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Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2020	May 01, 2020
Document Information [Line Items]
Entity Central Index Key	0000891103
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	0-20570
Entity Registrant Name	IAC/INTERACTIVECORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	59-2712887
Entity Address, Address Line One	555 West 18th Street
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10011
City Area Code	212
Local Phone Number	314-7300
Title of 12(b) Security	Common Stock, par value $0.001
Trading Symbol	IAC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		79,175,691
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		5,789,499

CONSOLIDATED BALANCE SHEET - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 2,822,729	$ 3,139,295
Short-term investments	20,000	0
Marketable securities	49,912	19,993
Accounts receivable, net of allowance and reserves of $28,669 and $24,726, respectively	375,854	298,334
Other current assets	267,814	249,367
Total current assets	3,536,309	3,706,989
Property, capitalized software and equipment, net of accumulated depreciation and amortization	373,561	371,353
Goodwill	3,042,139	2,854,462
Intangible assets, net of accumulated amortization	671,467	578,474
Long-term investments	301,592	353,052
Deferred income taxes	190,849	167,054
Other non-current assets	318,832	301,441
TOTAL ASSETS	8,434,749	8,332,825
LIABILITIES:
Current portion of long-term debt	13,750	13,750
Accounts payable, trade	102,367	94,356
Deferred revenue	433,728	397,490
Accrued expenses and other current liabilities	514,571	502,003
Total current liabilities	1,064,416	1,007,599
Long-term debt, net	3,625,008	3,121,572
Income taxes payable	18,398	36,489
Deferred income taxes	19,398	21,388
Other long-term liabilities	210,274	202,932
Redeemable noncontrolling interests	42,431	44,527
Commitments and contingencies
SHAREHOLDERS' EQUITY:
Additional paid-in capital	11,412,142	11,683,799
Retained earnings	1,478,885	1,689,925
Accumulated other comprehensive loss	(157,285)	(136,349)
Treasury stock 194,708 shares	(10,309,612)	(10,309,612)
Total IAC shareholders' equity	2,424,410	2,928,042
Noncontrolling interests	1,030,414	970,276
Total shareholders' equity	3,454,824	3,898,318
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	8,434,749	8,332,825
Common stock $.001 par value; authorized 1,600,000 shares; issued 263,502 and 263,230 shares, respectively, and outstanding 79,162 and 78,890 shares, respectively
SHAREHOLDERS' EQUITY:
Common stock	264	263
Class B convertible common stock $.001 par value; authorized 400,000 shares; issued 16,157 shares and outstanding 5,789 shares
SHAREHOLDERS' EQUITY:
Common stock	$ 16	$ 16

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Allowance for credit loss	$ 28,669	$ 24,726
Treasury stock (shares)	194,708,000	194,708,000
Common stock $.001 par value; authorized 1,600,000 shares; issued 263,502 and 263,230 shares, respectively, and outstanding 79,162 and 78,890 shares, respectively
Par value of common stock (USD per share)	$ 0.001	$ 0.001
Common stock authorized (shares)	1,600,000,000	1,600,000,000
Common stock issued (shares)	263,502,000	263,230,000
Common stock outstanding (shares)	79,162,000	78,890,000
Class B convertible common stock $.001 par value; authorized 400,000 shares; issued 16,157 shares and outstanding 5,789 shares
Par value of common stock (USD per share)	$ 0.001	$ 0.001
Common stock authorized (shares)	400,000,000	400,000,000
Common stock issued (shares)	16,157,000	16,157,000
Common stock outstanding (shares)	5,789,000	5,789,000

CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue	$ 1,228,765	$ 1,105,843
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	323,221	260,071
Selling and marketing expense	432,697	421,860
General and administrative expense	256,021	213,616
Product development expense	105,733	88,700
Depreciation	24,738	18,971
Amortization of intangibles	52,162	22,752
Goodwill impairment	211,973	0
Total operating costs and expenses	1,406,545	1,025,970
Operating (loss) income	(177,780)	79,873
Interest expense	(44,866)	(31,143)
Other (expense) income, net	(49,893)	651
(Loss) earnings before income taxes	(272,539)	49,381
Income tax benefit	89,896	63,604
Net (loss) earnings	(182,643)	112,985
Net earnings attributable to noncontrolling interests	(28,397)	(24,290)
Net (loss) earnings attributable to IAC shareholders	$ (211,040)	$ 88,695
Per share information attributable to IAC shareholders:
Basic earnings per share (USD per share)	$ (2.49)	$ 1.06
Diluted earnings per share (USD per share)	$ (2.49)	$ 0.91
Stock-based compensation expense by function:
Stock-based compensation expense	$ 58,464	$ 67,444
Cost of revenue
Stock-based compensation expense by function:
Stock-based compensation expense	1,185	1,289
Selling and marketing expense
Stock-based compensation expense by function:
Stock-based compensation expense	2,424	2,717
General and administrative expense
Stock-based compensation expense by function:
Stock-based compensation expense	44,637	45,010
Product development expense
Stock-based compensation expense by function:
Stock-based compensation expense	$ 10,218	$ 18,428

CONSOLIDATED STATEMENT OF COMPREHENSIVE OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) earnings	$ (182,643)	$ 112,985
Other comprehensive (loss) income, net of income taxes:
Change in foreign currency translation adjustment	(26,093)	1,309
Change in unrealized gains and losses of available-for-sale securities	(12)	1
Total other comprehensive (loss) income, net of income taxes	(26,105)	1,310
Comprehensive (loss) income, net of income taxes	(208,748)	114,295
Components of comprehensive (income) loss attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(28,397)	(24,290)
Change in foreign currency translation adjustment attributable to noncontrolling interests	4,766	(316)
Change in unrealized gains and losses of available-for-sale debt securities attributable to noncontrolling interests	0	1
Comprehensive income attributable to noncontrolling interests	(23,631)	(24,605)
Comprehensive (loss) income attributable to IAC shareholders	$ (232,379)	$ 89,690

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Redeemable Noncontrolling Interests	Total IAC Shareholders' Equity	Common Stock Common Stock $.001 Par Value	Common Stock Class B Convertible Common Stock $.001 Par Value	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Noncontrolling Interests	Match Group and ANGI Homeservices	Match Group and ANGI Homeservices Total IAC Shareholders' Equity	Match Group and ANGI Homeservices Additional Paid-in Capital	Match Group and ANGI Homeservices Accumulated Other Comprehensive (Loss) Income	Match Group and ANGI Homeservices Noncontrolling Interests
Balance at beginning of period at Dec. 31, 2018		$ 65,687
Increase (Decrease) in Redeemable Noncontrolling Interests
Net (loss) earnings		(1,051)
Other comprehensive income (loss), net of income taxes		186
Stock-based compensation expense		42
Purchase of redeemable noncontrolling interests		(3,182)
Adjustment of redeemable noncontrolling interests to fair value		10,242
Other		(10)
Balance at end of period at Mar. 31, 2019		71,914
Balance at beginning of period at Dec. 31, 2018	$ 3,551,801		$ 2,843,125	$ 262	$ 16	$ 12,022,387	$ 1,258,794	$ (128,722)	$ (10,309,612)	$ 708,676
Balance at beginning of period (shares) at Dec. 31, 2018				262,303,000	16,157,000
Increase (Decrease) in Shareholders' Equity
Net (loss) earnings	114,036		88,695				88,695			25,341
Other comprehensive income (loss), net of income taxes	1,124		995					995		129
Stock-based compensation expense	67,402		20,165			20,165				47,237
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares)				326,000
Issuance of common stock pursuant to stock-based awards, net of withholding taxes	(4,910)		(4,910)	$ 1		(4,911)
Adjustment of redeemable noncontrolling interests to fair value	(10,242)		(10,242)			(10,242)
Issuance of common stock pursuant to stock-based awards, net of withholding taxes											$ (147,858)	$ (157,950)	$ (158,958)	$ 1,008	$ 10,092
Other	(17)		(17)			(17)
Balance at end of period at Mar. 31, 2019	3,571,336		2,779,861	$ 263	$ 16	11,868,424	1,347,489	(126,719)	(10,309,612)	791,475
Balance at end of period (shares) at Mar. 31, 2019				262,629,000	16,157,000
Balance at beginning of period at Dec. 31, 2019	44,527	44,527
Increase (Decrease) in Redeemable Noncontrolling Interests
Net (loss) earnings		(1,462)
Other comprehensive income (loss), net of income taxes		99
Stock-based compensation expense		15
Purchase of redeemable noncontrolling interests		(3,165)
Adjustment of redeemable noncontrolling interests to fair value		2,418
Other		(1)
Balance at end of period at Mar. 31, 2020	42,431	$ 42,431
Balance at beginning of period at Dec. 31, 2019	3,898,318		2,928,042	$ 263	$ 16	11,683,799	1,689,925	(136,349)	(10,309,612)	970,276
Balance at beginning of period (shares) at Dec. 31, 2019				263,230,000	16,157,000
Increase (Decrease) in Shareholders' Equity
Net (loss) earnings	(181,181)		(211,040)				(211,040)			29,859
Other comprehensive income (loss), net of income taxes	(26,204)		(21,339)					(21,339)		(4,865)
Stock-based compensation expense	56,085		11,499			11,499				44,586
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (shares)				272,000
Issuance of common stock pursuant to stock-based awards, net of withholding taxes	(20,515)		(20,515)	$ 1		(20,516)
Adjustment of redeemable noncontrolling interests to fair value	(2,418)		(2,418)			(2,418)
Issuance of common stock pursuant to stock-based awards, net of withholding taxes											(148,604)	(139,162)	(139,565)	$ 403	$ (9,442)
Purchase of treasury stock											$ (120,658)	$ (120,658)	$ (120,658)
Other	1		1			1
Balance at end of period at Mar. 31, 2020	$ 3,454,824		$ 2,424,410	$ 264	$ 16	$ 11,412,142	$ 1,478,885	$ (157,285)	$ (10,309,612)	$ 1,030,414
Balance at end of period (shares) at Mar. 31, 2020				263,502,000	16,157,000

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Parenthetical)	Mar. 31, 2020 $ / shares
Common Stock $.001 Par Value
Par value of common stock (USD per share)	$ 0.001
Class B Convertible Common Stock $.001 Par Value
Par value of common stock (USD per share)	0.001
Common Stock \| Common Stock $.001 Par Value
Par value of common stock (USD per share)	0.001
Common Stock \| Class B Convertible Common Stock $.001 Par Value
Par value of common stock (USD per share)	$ 0.001

CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net (loss) earnings	$ (182,643)	$ 112,985
Adjustments to reconcile net earnings to net cash provided by operating activities:
Stock-based compensation expense	58,464	67,444
Amortization of intangibles	52,162	22,752
Depreciation	24,738	18,971
Bad debt expense	19,931	15,005
Goodwill impairment	211,973	0
Deferred income taxes	(59,166)	(65,107)
Losses on equity securities, net	51,473	44
Other adjustments, net	20,690	18,697
Changes in assets and liabilities, net of effects of acquisitions and dispositions:
Accounts receivable	(79,799)	(88,367)
Other assets	10,172	6,730
Accounts payable and other liabilities	(24,720)	(26,829)
Income taxes payable and receivable	(47,787)	(6,154)
Deferred revenue	25,487	26,770
Net cash provided by operating activities	80,975	102,941
Cash flows from investing activities:
Acquisitions, net of cash acquired	(532,857)	(21,555)
Capital expenditures	(24,591)	(25,855)
Proceeds from maturities of marketable debt securities	20,000	123,500
Purchases of marketable debt securities	(49,806)	(39,740)
Net proceeds from the sale of businesses and investments	1,476	20,472
Purchases of investments	(25)	0
Other, net	(203)	(1,215)
Net cash (used in) provided by investing activities	(586,006)	55,607
Cash flows from financing activities:
Debt issuance costs	(8,977)	(5,542)
Purchase of noncontrolling interests	(3,165)	(3,182)
Other, net	(464)	27
Net cash provided by (used in) financing activities	194,663	(73,660)
Total cash (used) provided	(310,368)	84,888
Effect of exchange rate changes on cash and cash equivalents and restricted cash	(5,996)	815
Net (decrease) increase in cash and cash equivalents and restricted cash	(316,364)	85,703
Cash and cash equivalents and restricted cash at beginning of period	3,140,358	2,133,685
Cash and cash equivalents and restricted cash at end of period	2,823,994	2,219,388
IAC/InterActiveCorp
Cash flows from financing activities:
Proceeds from the exercise of stock options	412	9,298
Withholding taxes paid on behalf of employees on net settled stock-based awards	(20,927)	(14,062)
Match Group and ANGI Homeservices
Cash flows from financing activities:
Purchase of treasury stock	(120,198)	(24,186)
Proceeds from the exercise of stock options	0	573
Withholding taxes paid on behalf of employees on net settled stock-based awards	(148,580)	(123,148)
Match Group
Cash flows from financing activities:
Proceeds from issuance of Match Group debt	500,000	350,000
Borrowings under Match Group Credit Facility	0	40,000
Principal payments on debt	0	(300,000)
ANGI Homeservices
Cash flows from financing activities:
Principal payments on debt	$ (3,438)	$ (3,438)

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

IAC operates Vimeo, Dotdash and Care.com, among many other online businesses, and has majority ownership of both Match Group, which includes Tinder, Match, PlentyOfFish, OkCupid and Hinge, and ANGI Homeservices, which includes HomeAdvisor, Angie’s List and Handy.

Separation

On December 19, 2019, IAC/InterActiveCorp ("IAC") entered into a Transaction Agreement (as amended as of April 28, 2020, the "Transaction Agreement") with Match Group, Inc. ("MTCH"), IAC Holdings, Inc., a direct wholly owned subsidiary of IAC ("New IAC"), and Valentine Merger Sub LLC, an indirect wholly owned subsidiary of IAC. Subject to the terms and conditions set forth in the Transaction Agreement, the businesses of MTCH will be separated from the remaining businesses of IAC through a series of transactions that will result in the pre-transaction stockholders of IAC owning shares in two, separate public companies—(1) IAC, which will be renamed Match Group, Inc. ("New Match") and which will own the businesses of MTCH and certain IAC financing subsidiaries, and (2) New IAC, which will be renamed IAC/InterActiveCorp and which will own IAC's other businesses—and the pre-transaction stockholders of MTCH (other than IAC) owning shares in New Match. Completion of the separation, which is expected to occur in the second quarter of 2020, is subject to a number of conditions, including approval by a majority of the disinterested shareholders of MTCH, approval of IAC’s shareholders and other customary conditions and approvals. This transaction is referred to as the "Separation".

As used herein, "IAC," the "Company," "we," "our" or "us" and similar terms refer to IAC/InterActiveCorp and its subsidiaries (unless the context requires otherwise).

As of March 31, 2020, IAC’s economic interest and voting interest in:


•	Match Group were 80.4%, and 97.4%, respectively. All references to "Match Group" or "MTCH" in this report are to Match Group, Inc.


•	ANGI Homeservices were 84.9%, and 98.3%, respectively. All reference to "ANGI Homeservices" or "ANGI" in this report are to ANGI Homeservices Inc.

COVID-19 Update

The Company's business could be materially and adversely affected by the outbreak of COVID-19, which has been declared a "pandemic" by the World Health Organization.

To date, the Company's ANGI Homeservices business has experienced a decline in demand for home services requests, driven primarily by decreases in demand in certain categories of jobs (particularly non-essential projects) and decreases in demand in regions most affected by the COVID-19 outbreak, which the Company attributes both to the unwillingness of consumers to interact with service professionals face-to-face or have service professionals in their homes, and to lower levels of consumer confidence and discretionary income generally. In addition, with respect to the Company's ad-supported businesses, the Company has experienced a meaningful decrease in advertising rates across the Company's various properties (as much as 30% year over year). And while the Company's Match Group business has experienced improved user and engagement metrics, it has also experienced a decline in new users and paying subscribers during the pandemic.

In connection with the first quarter close of its books, the Company determined that the effects of COVID-19 were an indicator of possible impairment for certain of its assets. The Company determined, as of March 31, 2020, the fair value for those assets for which COVID-19 was deemed to be an indicator of possible impairment and identified the following impairments:


•	a $212.0 million impairment related to the goodwill of the Desktop reporting unit;


•	a $21.4 million impairment related to certain indefinite-lived intangible assets of the Desktop reporting unit;


•	a $4.6 million impairment related to certain indefinite-lived intangible assets of the Match Group reporting unit;


•	a $51.5 million impairment of certain equity securities without readily determinable fair values; and


•	a $7.5 million impairment of a note receivable and a warrant related to certain investees.

The extent to which developments related to the COVID-19 outbreak and measures designed to curb its spread continue to impact the Company’s business, financial condition and results of operations will depend on future developments, all of which are highly uncertain and many of which are beyond the Company’s control, including the speed of contagion, the development and implementation of effective preventative measures and possible treatments, the scope of governmental and other restrictions on travel, non-essential services and other activity, and public reactions to these developments. For example, these developments and measures have resulted in rapid and adverse changes to the operating environment in which we do business, as well as significant uncertainty concerning the near and long term economic ramifications of the COVID-19 outbreak, which have adversely impacted our ability to forecast our results and respond in a timely and effective manner to trends related to the COVID-19 outbreak. The longer the global outbreak and measures designed to curb the spread of the virus continue to adversely affect levels of consumer confidence, discretionary spending and the willingness of consumers to interact with other consumers, vendors and service providers face-to-face (and in turn, adversely affect demand for the Company’s various products and services), the greater the adverse impact is likely to be on the Company’s business, financial condition and results of operations and the more limited will be the Company’s ability to try and make up for delayed or lost revenues.

Basis of Presentation and Consolidation

The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles ("GAAP").

The consolidated financial statements include the accounts of the Company, all entities that are wholly-owned by the Company and all entities in which the Company has a controlling financial interest. Intercompany transactions and accounts have been eliminated.

In management's opinion, the unaudited interim consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements and reflect all adjustments, consisting of normal and recurring adjustments, necessary for the fair presentation of the Company's consolidated financial position, consolidated results of operations and consolidated cash flows for the periods presented. Interim results are not necessarily indicative of the results that may be expected for the full year. The accompanying unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2019.

Accounting Estimates

Management of the Company is required to make certain estimates, judgments and assumptions during the preparation of its consolidated financial statements in accordance with GAAP. These estimates, judgments and assumptions impact the reported amounts of assets, liabilities, revenue and expenses and the related disclosure of contingent assets and liabilities. Actual results could differ from these estimates.

On an ongoing basis, the Company evaluates its estimates and judgments, including those related to: the fair values of cash equivalents and marketable debt securities; the carrying value of accounts receivable, including the determination of the allowance for doubtful accounts; the determination of revenue reserves; the carrying value of right-of-use assets ("ROU assets"); the useful lives and recoverability of definite-lived intangible assets and property, capitalized software and equipment; the recoverability of goodwill and indefinite-lived intangible assets; the fair value of equity securities without readily determinable fair values; contingencies; the fair value of acquisition-related contingent consideration arrangements; unrecognized tax benefits; the valuation allowance for deferred income tax assets; and the fair value of and forfeiture rates for stock-based awards, among others. The Company bases its estimates and judgments on historical experience, its forecasts and budgets and other factors that the Company considers relevant.

Accounting for Investments in Equity Securities

Investments in equity securities, other than those of the Company's consolidated subsidiaries and those accounted for under the equity method, if applicable, are accounted for at fair value or under the measurement alternative of Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, following its adoption on January 1, 2018, with any changes to fair value recognized within other income (expense), net each reporting period. Under the measurement alternative, equity investments without readily determinable fair values are carried at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for identical or similar securities of the same issuer; value is generally determined based on a market approach as of the transaction date. A security will be considered identical or similar if it has identical or similar rights to the equity securities held by the Company. The Company reviews its investments in equity securities without readily determinable fair values for impairment each reporting period when there are qualitative factors or events that indicate possible impairment. Factors the Company considers in making this determination include negative changes in industry and market conditions, financial performance, business prospects, and other relevant events and factors. When indicators of impairment exist, the Company prepares quantitative assessments of the fair value of the its investments in equity securities, which require judgment and the use of estimates. When the Company's assessment indicates that the fair value of the investment is below its carrying value, the Company writes down the investment to its fair value and records the corresponding charge within other income (expense), net. See "Note 4—Financial Instruments and Fair Value Measurements" for additional information on the impairments of certain equity securities without readily determinable fair values recorded in the quarter ended March 31, 2020.

In the event the Company has investments in the common stock or in-substance common stock of entities in which the Company has the ability to exercise significant influence over the operating and financial matters of the investee, but does not have a controlling financial interest, are accounted for using the equity method and are included in "Long-term investments" in the accompanying consolidated balance sheet. At March 31, 2020 and December 31, 2019, the Company did not have any investments accounted for using the equity method.

General Revenue Recognition

Revenue is recognized when control of the promised services or goods is transferred to the Company's customers and in the amount that reflects the consideration the Company expects to be entitled to in exchange for those services or goods.

The Company's disaggregated revenue disclosures are presented in "Note 8—Segment Information."

Prior to January 1, 2020, ANGI's Handy business recorded revenue on a net basis. Effective January 1, 2020, the Company modified the Handy terms and conditions so that Handy, rather than the service professional, has the contractual relationship with the consumer to deliver the service and Handy, rather than the consumer, has the contractual relationship with the service professional. Consumers request services and pay for such services directly through the Handy platform and then Handy fulfills the request with independently established home services providers engaged in a trade, occupation and/or business that customarily provides such services. This change in contractual terms requires gross revenue accounting treatment effective January 1, 2020. Also, in the case of certain tasks, HomeAdvisor provides a pre-priced product offering, pursuant to which consumers can request services through a HomeAdvisor platform and pay HomeAdvisor for the services directly. HomeAdvisor then fulfills the request with independently established home services providers engaged in a trade, occupation and/or business that customarily provides such services. Revenue from HomeAdvisor’s pre-priced product offering is also recorded on a gross basis effective January 1, 2020. In addition to changing the presentation of revenue to gross from net, the timing of revenue recognition will change for pre-priced jobs and will be later than the timing of existing consumer connection revenue for HomeAdvisor because the Company will not be able to record revenue, generally, until the service professional completes the job on the Company's behalf. The change to gross revenue reporting for Handy and HomeAdvisor’s pre-priced product offering, effective January 1, 2020, resulted in an increase in revenue of $15.2 million during the three months ended March 31, 2020.

Deferred Revenue

Deferred revenue consists of advance payments that are received or are contractually due in advance of the Company's performance. The Company’s deferred revenue is reported on a contract by contract basis at the end of each reporting period. The Company classifies deferred revenue as current when the term of the applicable subscription period or expected completion of the Company's performance obligation is one year or less. The current and non-current deferred revenue balances at December 31, 2019 are $397.5 million and $1.3 million, respectively. During the three months ended March 31, 2020, the

Company recognized $258.2 million of revenue that was included in the deferred revenue balance as of December 31, 2019. During the three months ended March 31, 2019, the Company recognized $234.8 million of revenue that was included in the deferred revenue balance as of December 31, 2018. The current and non-current deferred revenue balances at March 31, 2020 are $433.7 million and $1.3 million, respectively. Non-current deferred revenue is included in “Other long-term liabilities” in the accompanying consolidated balance sheet.

Practical Expedients and Exemptions

As permitted under the practical expedient available under ASU No. 2014-09, Revenue from Contracts with Customers, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less, (ii) contracts with variable consideration that is allocated entirely to unsatisfied performance obligations or to a wholly unsatisfied promise accounted for under the series guidance, and (iii) contracts for which the Company recognizes revenue at the amount which the Company has the right to invoice for services performed.

For sales incentive programs where the customer relationship period is one year or less, the Company has elected the practical expedient to expense the costs as incurred. The amount of capitalized sales commissions where the customer relationship period is greater than one year is $47.5 million and $42.4 million at March 31, 2020 and December 31, 2019, respectively.

Certain Risks and Concentrations—Services Agreement with Google

A meaningful portion of the Company's revenue is attributable to a services agreement with Google (the "Services Agreement"). In addition, the Company earns certain other advertising revenue from Google that is not attributable to the Services Agreement. For the three months ended March 31, 2020 and 2019, consolidated revenue earned from Google was $138.9 million and $195.8 million, representing 11% and 18%, respectively, of the Company's consolidated revenue. Accounts receivable related to revenue earned from Google totaled $48.7 million and $53.0 million at March 31, 2020 and December 31, 2019, respectively.

Revenue attributable to the Services Agreement is earned by the Desktop business within the Applications segment and Ask Media Group within the Emerging & Other segment. For the three months ended March 31, 2020 and 2019, revenue earned from the Services Agreement was $46.1 million and $88.1 million, respectively, within the Applications segment and $80.5 million and $94.8 million, respectively, within the Emerging & Other segment.

The Services Agreement was scheduled to expire on March 31, 2020. On February 11, 2019, the Company and Google amended the Services Agreement, effective as of April 1, 2020. The amendment extends the expiration date of the agreement to March 31, 2023; provided that during September 2020 and during each September thereafter, either party may, after discussion with the other party, terminate the Services Agreement, effective on September 30 of the year following the year such notice is given. The Company believes that the amended agreement, taken as a whole, is comparable to the pre-amendment agreement with Google. The Services Agreement requires that the Company comply with certain guidelines promulgated by Google. Google may generally unilaterally update its policies and guidelines without advance notice. These updates may be specific to the Services Agreement or could be more general and thereby impact the Company as well as other companies. These policy and guideline updates could in turn require modifications to, or prohibit and/or render obsolete certain of the Company's products, services and/or business practices, which could be costly to address or otherwise have an adverse effect on the Company's consolidated financial condition and results of operations, particularly the Desktop business and Ask Media Group. From time to time, Google has made changes to the policies under the Services Agreement and has also made industry-wide changes that have negatively impacted the Desktop business and may do so in the future.

Adoption of ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes

The Company adopted ASU No. 2019-12 effective January 1, 2020, which simplifies the accounting for income taxes, eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. Most amendments within ASU No. 2019-12 are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. The Company adopted ASU No. 2019-12 on January 1, 2020 using the modified retrospective basis for those amendments that are not applied on a

prospective basis. The adoption of ASU No. 2019-12 did not have a material impact on the Company’s consolidated financial statements.

Reclassifications

Certain prior year amounts have been reclassified to conform to the current year presentation.

INCOME TAXES

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

INCOME TAXES

At the end of each interim period, the Company estimates the annual expected effective income tax rate and applies that rate to its ordinary year-to-date earnings or loss. The income tax provision or benefit related to significant, unusual, or extraordinary items, if applicable, that will be separately reported or reported net of their related tax effects are individually computed and recognized in the interim period in which they occur. In addition, the effect of changes in enacted tax laws or rates, tax status, judgment on the realizability of a beginning-of-the-year deferred tax asset in future years or unrecognized tax benefits is recognized in the interim period in which the change occurs.

The computation of the annual expected effective income tax rate at each interim period requires certain estimates and assumptions including, but not limited to, the expected pre-tax income (or loss) for the year, projections of the proportion of income (and/or loss) earned and taxed in foreign jurisdictions, permanent and temporary differences, and the likelihood of the realization of deferred tax assets generated in the current year. The accounting estimates used to compute the provision or benefit for income taxes may change as new events occur, more experience is acquired, additional information is obtained or the Company's tax environment changes. To the extent that the expected annual effective income tax rate changes during a quarter, the effect of the change on prior quarters is included in income tax provision in the quarter in which the change occurs.

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law. The CARES Act provides opportunities for additional liquidity, loan guarantees, and other government programs to support companies affected by the COVID-19 pandemic and their employees. Based on the Company's preliminary analysis of the CARES Act, IAC expects to avail itself of the following:


•	a refund of federal income taxes due to a five-year carryback of net operating loss incurred in 2019;


•	accelerated depreciation deductions;


•	a relaxation of interest expense deduction limitations for income tax purposes; and


•	a deferral of 2020 employer social security payroll taxes.

The Company continues to review and consider worldwide government programs related to the COVID-19 pandemic; however, the Company does not expect the impact of these programs to be material.

For the three months ended March 31, 2020, the Company recorded an income tax benefit of $89.9 million due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards and a revaluation of net operating loss deferred taxes due to the CARES Act, partially offset by the non-deductible portion of the Desktop goodwill impairment charge and unbenefited losses related to other investment impairments. For the three months ended March 31, 2019, the Company recorded an income tax benefit, despite pre-tax income, of $63.6 million, due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards.

The Company recognizes interest and, if applicable, penalties related to unrecognized tax benefits in the income tax provision. Accruals for interest and penalties are not material.

The Company is routinely under audit by federal, state, local and foreign authorities in the area of income tax. These audits include questioning the timing and the amount of income and deductions and the allocation of income and deductions among various tax jurisdictions. The Internal Revenue Service ("IRS") has substantially completed its audit of the Company’s federal income tax returns for the years ended December 31, 2010 through 2016, resulting in reductions to the manufacturing tax deduction and research credits claimed. The IRS is expected to begin an audit of the year ended December 31, 2017 in the second quarter. The statute of limitations for the years 2010 through 2012 has been extended to November 30, 2020 and the statute of limitations for the years 2013 through 2016 has been extended to March 31, 2021. Returns filed in various other jurisdictions are open to examination for tax years beginning with 2009. Income taxes payable include unrecognized tax

benefits considered sufficient to pay assessments that may result from examination of prior year tax returns. The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may not accurately anticipate actual outcomes and, therefore, may require periodic adjustment. Although management currently believes changes in unrecognized tax benefits from period to period and differences between amounts paid, if any, upon resolution of issues raised in audits and amounts previously provided will not have a material impact on the liquidity, results of operations, or financial condition of the Company, these matters are subject to inherent uncertainties and management’s view of these matters may change in the future.

At March 31, 2020 and December 31, 2019, unrecognized tax benefits, including interest and penalties, are $56.2 million and $74.4 million, respectively. Unrecognized tax benefits, including interest and penalties, at March 31, 2020 decreased by $18.2 million due primarily to the effective settlement of certain prior year tax positions with the IRS relating to the manufacturing tax deduction and research credits. If unrecognized tax benefits at March 31, 2020 are subsequently recognized, $51.1 million, net of related deferred tax assets and interest, would reduce income tax expense. The comparable amount as of December 31, 2019 was $69.2 million. The Company believes it is reasonably possible that its unrecognized tax benefits could decrease by $9.9 million by March 31, 2021, due primarily to expirations of statutes of limitations and other settlements, $9.7 million of which would reduce the income tax provision.

GOODWILL AND INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

Goodwill and intangible assets, net are as follows:



	March 31,		December 31,
	2020		2019
	(In thousands)
Goodwill	$	3,042,139	$	2,854,462
Intangible assets with indefinite lives	473,208		446,495
Intangible assets with definite lives, net of accumulated amortization	198,259		131,979
Total goodwill and intangible assets, net	$	3,713,606	$	3,432,936

The following table presents the balance of goodwill by reportable segment, including the changes in the carrying value of goodwill, for the year ended March 31, 2020:



	Balance at December 31, 2019		Additions		(Deductions)			Impairment			Foreign Exchange Translation			Balance at March 31, 2020
	(In thousands)
Match Group	$	1,239,840	$	—	$	—		$	—		$	(12,108	)	$	1,227,732
ANGI Homeservices	882,051		—		—			—			(4,867		)	877,184
Vimeo	219,374		—		(38		)	—			—			219,336
Applications:
Desktop	265,146		—		—			(211,973		)	—			53,173
Mosaic Group	239,602		—		—			—			(134		)	239,468
Total Applications	504,748		—		—			(211,973		)	(134		)	292,641
Emerging & Other	8,449		416,797		—			—			—			425,246
Total	$	2,854,462	$	416,797	$	(38	)	$	(211,973	)	$	(17,109	)	$	3,042,139

Additions are related to the acquisition of Care.com (included in Emerging & Other Segment).

In connection with the first quarter close of its books, the Company determined that the effects of COVID-19 were an indicator of possible impairment for certain of its reporting units and indefinite-lived intangible assets. The Company

determined the fair value of these reporting units and indefinite-lived intangible assets as of March 31, 2020 and identified the following impairments:


•	a $212.0 million impairment related to the goodwill of the Desktop reporting unit;


•	a $21.4 million impairment related to certain indefinite-lived intangible assets of the Desktop reporting unit; and


•	a $4.6 million impairment related to certain indefinite-lived intangible assets of the Match Group reporting unit.

In addition, the updated valuation of the Mosaic Group reporting unit indicates that the fair value of this reporting unit approximates its carrying value. The goodwill of the Desktop and Mosaic Group reporting units is $53.2 million and $239.5 million, respectively, as of March 31, 2020. To the extent there is a decline in the fair value of these reporting units, a goodwill impairment would be recorded to the extent the carrying value exceeds the fair value.

The fair value of the Desktop and Mosaic Group reporting units was determined using both an income approach based on discounted cash flows ("DCF") and a market approach. Determining fair value using a DCF analysis requires the exercise of significant judgment with respect to several items, including the amount and timing of expected future cash flows and appropriate discount rates. The expected cash flows used in the DCF analyses were based on the most recent forecasts for Desktop and Mosaic Group for 2020 and each of the years in the forecast period, which were updated in light of COVID-19. For years beyond the forecast period, Desktop and Mosaic Group estimates were based, in part, on forecasted growth rates. The discount rates used in the DCF analyses were intended to reflect the risks inherent in the expected future cash flows of the Desktop and Mosaic Group reporting units. The discount rate used for determining the fair value of both the Desktop and Mosaic Group reporting units was 15.0%. Determining fair value using a market approach considers multiples of financial metrics based on both acquisitions and trading multiples of a selected peer group of companies. From the comparable companies, a representative market multiple is determined, which is applied to financial metrics to estimate the fair value of the Desktop and Mosaic Group reporting units. To determine a peer group of companies for Desktop and Mosaic Group, the Company considered companies relevant in terms of consumer use, monetization model, margin and growth characteristics, and brand strength operating in their respective sectors. The aggregate carrying value of goodwill for which the most recent estimate of the excess of fair value over carrying value is less than 20% is approximately $709.4 million.

The following table presents the balance of goodwill by reportable segment, including the changes in the carrying value of goodwill, for the year ended December 31, 2019:



	Balance at December 31, 2018		Additions		(Deductions)			Impairment			Foreign Exchange Translation			Balance at December 31, 2019
	(In thousands)
Match Group	$	1,245,013	$	3,553	$	—		$	—		$	(8,726	)	$	1,239,840
ANGI Homeservices	892,800		18,326		(29,267		)	—			192			882,051
Vimeo	77,152		142,222		—			—			—			219,374
Applications:
Desktop	265,146		—		—			—			—			265,146
Mosaic Group	239,746		—		—			—			(144		)	239,602
Total Applications	504,892		—		—			—			(144		)	504,748
Emerging & Other	7,002		4,765		—			(3,318		)	—			8,449
Total	$	2,726,859	$	168,866	$	(29,267	)	$	(3,318	)	$	(8,678	)	$	2,854,462

Additions primarily relate to the acquisitions of Magisto (included in the Vimeo segment) and Fixd Repair (included in the ANGI Homeservices segment). Deductions primarily relate to tax benefits of acquired attributes related to the acquisition of Handy (included in the ANGI Homeservices segment). During the fourth quarter of 2019, the Company recorded an impairment charge of $3.3 million related to the goodwill of the College Humor Media business (included in the Emerging & Other Segment).

The March 31, 2020 and December 31, 2019 goodwill balances reflect accumulated impairment losses of $741.1 million and $529.1 million, respectively, at Applications. The March 31, 2020 and December 31, 2019 goodwill balances also reflect accumulated impairment losses of $399.7 million, $198.3 million, and $14.9 million at the businesses previously included in

the IAC Publishing segment (excluding Dotdash, included in the Emerging & Other segment), Dotdash and College Humor Media (included in the Emerging & Other segment), respectively.

As described above, since the effects of COVID-19 were an indicator of impairment, the Company updated its calculations of the fair value of its indefinite-lived intangible assets as of March 31, 2020. The Company recorded impairment charges of $21.4 million and $4.6 million at Desktop and MTCH, respectively, related to indefinite-lived trade names. The impairment of indefinite-lived intangible assets is included in “Amortization of intangibles” in the accompanying consolidated statement of operations. The Company determines the fair value of indefinite-lived intangible assets using an avoided royalty DCF valuation analysis. Significant judgments inherent in this analysis include the selection of appropriate royalty and discount rates and estimating the amount and timing of expected future cash flows. The discount rates used in the DCF analyses were intended to reflect the risks inherent in the expected future cash flows generated by the respective intangible assets. The royalty rates used in the DCF analyses were based upon an estimate of the royalty rates that a market participant would pay to license the Company's trade names and trademarks. The discount rates used to value the trade names, including those that were impaired, in the first quarter of 2020 ranged from 10.5% to 15.0% and the royalty rates used ranged from 1.0% to 6.0%. The aggregate carrying value of indefinite-lived intangible assets for which the most recent estimate of the excess of fair value over carrying value is less than 20% is approximately $162.5 million.

At March 31, 2020 and December 31, 2019, intangible assets with definite lives are as follows:



	March 31, 2020
	Gross Carrying Amount		Accumulated Amortization			Net		Weighted-Average Useful Life (Years)
	(In thousands)
Technology	$	203,737	$	(87,442	)	$	116,295	4.7
Service professional relationships	99,850		(83,560		)	16,290		3.0
Customer lists and user base	79,768		(26,804		)	52,964		4.0
Trade names	21,868		(15,544		)	6,324		2.7
Memberships	15,900		(13,264		)	2,636		3.0
Other	14,703		(10,953		)	3,750		3.7
Total	$	435,826	$	(237,567	)	$	198,259	4.0



	December 31, 2019
	Gross Carrying Amount		Accumulated Amortization			Net		Weighted-Average Useful Life (Years)
	(In thousands)
Technology	$	154,052	$	(79,358	)	$	74,694	4.6
Service professional relationships	99,651		(76,445		)	23,206		2.9
Customer lists and user base	44,548		(24,488		)	20,060		3.3
Trade names	19,074		(13,068		)	6,006		3.2
Memberships	15,900		(11,940		)	3,960		3.0
Other	13,952		(9,899		)	4,053		3.7
Total	$	347,177	$	(215,198	)	$	131,979	3.8

At March 31, 2020, amortization of intangible assets with definite lives is estimated to be as follows:



	(In thousands)
Remainder of 2020	$	60,498
2021	45,014
2022	39,859
2023	30,119
2024	15,841
Thereafter	6,928
Total	$	198,259

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS

Marketable Securities

At March 31, 2020 and December 31, 2019, the fair value of marketable securities are as follows:



	March 31, 2020		December 31, 2019
	(In thousands)
Available-for-sale marketable debt securities	$	49,912	$	19,993
Total marketable securities	$	49,912	$	19,993

At March 31, 2020, current available-for-sale marketable debt securities are as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
Treasury discount notes	$	49,924	$	—	$	(12	)	$	49,912
Total available-for-sale marketable debt securities	$	49,924	$	—	$	(12	)	$	49,912

The contractual maturities of debt securities classified as current available-for-sale at March 31, 2020 are within one year. There are no investments in available-for-sale marketable debt securities that have been in a continuous unrealized loss position for longer than twelve months as of March 31, 2020 and December 31, 2019.

At December 31, 2019, current available-for-sale marketable debt securities were as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Commercial paper	19,993		—		—		19,993
Total available-for-sale marketable debt securities	$	19,993	$	—	$	—	$	19,993

Equity Securities Without Readily Determinable Fair Values

At March 31, 2020 and December 31, 2019, the carrying values of the Company's investments in equity securities without readily determinable fair values totaled $301.6 million and $353.1 million, respectively, and are included in "Long-term investments" in the accompanying consolidated balance sheet. During the first quarter of 2020, the Company recorded unrealized impairments of $51.5 million related to certain equity securities without readily determinable fair values due to the impact of COVID-19. All gains and losses on equity securities without readily determinable fair values, realized and unrealized, are recognized in "Other (expense) income, net" in the accompanying consolidated statement of operations.

The following table presents a summary of unrealized gains and losses recorded in "Other (expense) income, net," as adjustments to the carrying value of equity securities without readily determinable fair values held as of March 31, 2020 and 2019.



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Upward adjustments (gross unrealized gains)	$	—		$	—
Downward adjustments including impairment (gross unrealized losses)	(51,484		)	(150		)
Total	$	(51,484	)	$	(150	)

The cumulative upward and downward adjustments (including impairments) to the carrying value of equity securities without readily determinable fair values held at March 31, 2020 were $19.9 million and $58.1 million, respectively.

Realized and unrealized gains and losses for the Company's marketable equity securities and investments without readily determinable fair values for the three months ended March 31, 2020 and 2019 are as follows:



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Realized gains, net, for equity securities sold	$	12		$	78
Unrealized losses, net, on equity securities held	(51,484		)	(122		)
Total losses, net recognized in other (expense) income, net	$	(51,472	)	$	(44	)

Fair Value Measurements

The Company categorizes its financial instruments measured at fair value into a fair value hierarchy that prioritizes the inputs used in pricing the asset or liability. The three levels of the fair value hierarchy are:


•	Level 1: Observable inputs obtained from independent sources, such as quoted market prices for identical assets and liabilities in active markets.

•

Level 2: Other inputs, which are observable directly or indirectly, such as quoted market prices for similar assets or liabilities in active markets, quoted market prices for identical or similar assets or liabilities in markets that are not active and inputs that are derived principally from or corroborated by observable market data. The fair values of the Company's Level 2 financial assets are primarily obtained from observable market prices for identical underlying securities that may not be actively traded. Certain of these securities may have different market prices from multiple market data sources, in which case an average market price is used.


•	Level 3: Unobservable inputs for which there is little or no market data and require the Company to develop its own assumptions, based on the best information available in the circumstances, about the assumptions market participants would use in pricing the assets or liabilities.

The following tables present the Company's financial instruments that are measured at fair value on a recurring basis:



	March 31, 2020
	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)			Total Fair Value Measurements
	(In thousands)
Assets:
Cash equivalents:
Money market funds	$	2,007,519	$	—	$	—		$	2,007,519
Treasury discount notes	—		99,882		—			99,882
Time deposits	—		72,809		—			72,809
Short-term investments	—		20,000		—			20,000
Marketable securities:
Treasury discount notes	—		49,912		—			49,912
Other non-current assets:
Warrant	—		—		6,489			6,489
Total	$	2,007,519	$	242,603	$	6,489		$	2,256,611

Liabilities:
Contingent consideration arrangement	$	—	$	—	$	(636	)	$	(636	)



	December 31, 2019
	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)			Total Fair Value Measurements
	(In thousands)
Assets:
Cash equivalents:
Money market funds	$	2,164,576	$	—	$	—		$	2,164,576
Treasury discount notes	—		199,896		—			199,896
Time deposits	—		128,075		—			128,075
Commercial paper	—		29,960		—			29,960
Marketable securities:
Commercial paper	—		19,993		—			19,993
Other non-current assets:
Warrant	—		—		8,495			8,495
Total	$	2,164,576	$	377,924	$	8,495		$	2,550,995

Liabilities:
Contingent consideration arrangement	$	—	$	—	$	(6,918	)	$	(6,918	)

The following table presents the changes in the Company's financial instruments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3):



	Three Months Ended March 31,
	2020						2019
	Warrant			Contingent Consideration Arrangements			Contingent Consideration Arrangement
	(In thousands)
Balance at January 1	$	8,495		$	(6,918	)	$	(28,631	)
Total net (losses) gains:
Included in earnings:
Fair value adjustments	(2,006		)	6,282			(1,529		)
Included in other comprehensive loss	—			—			(14		)
Fair value at date of acquisition	—			(1,000		)	—
Settlements	—			1,000			1,988
Balance at March 31	$	6,489		$	(636	)	$	(28,186	)

Warrant

As part of the Company’s investment in Turo, a peer-to-peer car sharing marketplace, the Company received a warrant that is net settleable at the Company's option and is recorded at fair value each reporting period with any change included in "Other (expense) income, net" in the accompanying consolidated statement of operations. The warrant is measured using significant unobservable inputs and is classified in the fair value hierarchy table as Level 3. The warrant is included in "Other non-current assets" in the accompanying consolidated balance sheet.

Contingent Consideration Arrangements

At March 31, 2020, the Company has one outstanding contingent consideration arrangement related to a business acquisition. The arrangement has a remaining total maximum contingent payment of $30.0 million. At March 31, 2020, the gross fair value of this arrangement, before unamortized discount, is $1.3 million. In connection with the Care.com acquisition on February 11, 2020, the Company assumed a contingent consideration arrangement liability of $1.0 million, which was subsequently paid during the first quarter of 2020. During the first quarter of 2019, the Company paid $2.0 million to settle a contingent consideration arrangement that was outstanding at December 31, 2018.

Generally, the Company's contingent consideration arrangements are based upon financial performance and/or operating metric targets and the Company generally determines the fair value of the contingent consideration arrangements by using probability-weighted analyses to determine the amounts of the gross liability, and, if the arrangements are initially long-term in nature, applying a discount rate that appropriately captures the risks associated with the obligations to determine the net amount reflected in the consolidated financial statements. The fair values of the contingent consideration arrangement at March 31, 2020 and December 31, 2019 reflect a discount rate of 25%.

The fair value of contingent consideration arrangements is sensitive to changes in the expected achievement of the applicable targets and changes in discount rates. The Company remeasures the fair value of the contingent consideration arrangements each reporting period, including the accretion of the discount, if applicable, and changes are recognized in "General and administrative expense" in the accompanying consolidated statement of operations. The contingent consideration arrangement liability at March 31, 2020 and December 31, 2019 includes a non-current portion of $0.6 million and $6.9 million, respectively. The non-current portion of the contingent consideration liability is included in “Other long-term liabilities” in the accompanying consolidated balance sheet.

Assets measured at fair value on a nonrecurring basis

The Company's non-financial assets, such as goodwill, intangible assets, ROU assets and property, capitalized software and equipment, are adjusted to fair value only when an impairment is recognized. The Company's financial assets, comprising equity securities without readily determinable fair values, are adjusted to fair value when observable price changes are identified or an impairment is recognized. Such fair value measurements are based predominantly on Level 3 inputs. See "Note 3—Goodwill and Intangible Assets" for a detailed description of the Desktop goodwill and indefinite-lived intangible asset impairments recorded in the quarter ended March 31, 2020.

Financial instruments measured at fair value only for disclosure purposes

The following table presents the carrying value and the fair value of financial instruments measured at fair value only for disclosure purposes:



	March 31, 2020						December 31, 2019
	Carrying Value			Fair Value			Carrying Value			Fair Value
	(In thousands)
Current portion of long-term debt	$	(13,750	)	$	(13,750	)	$	(13,750	)	$	(13,681	)
Long-term debt, net^(a)	(3,625,008		)	(4,017,844		)	(3,121,572		)	(4,136,988		)

_____________________


^(a)	At March 31, 2020 and December 31, 2019, the carrying value of long-term debt, net includes unamortized original issue discount and debt issuance costs of $397.8 million and $404.7 million, respectively.

At March 31, 2020 and December 31, 2019, the fair value of long-term debt is estimated using observable market prices or indices for similar liabilities, which are Level 2 inputs.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

LONG-TERM DEBT

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

LONG-TERM DEBT

Long-term debt consists of:



	March 31, 2020		December 31, 2019
	(In thousands)
MTCH debt:
MTCH Term Loan due February 13, 2027	$	425,000	$	425,000
6.375% Senior Notes due June 1, 2024 (the "6.375% MTCH Senior Notes"); interest payable each June 1 and December 1	400,000		400,000
5.00% Senior Notes due December 15, 2027 (the "5.00% MTCH Senior Notes"); interest payable each June 15 and December 15	450,000		450,000
5.625% Senior Notes due February 15, 2029 (the "5.625% MTCH Senior Notes"); interest payable each February 15 and August 15	350,000		350,000
4.125% Senior Notes due August 1, 2030 (the "4.125% MTCH Senior Notes"); interest payable each February 1 and August 1; commencing August 1, 2020	500,000		—
Total MTCH long-term debt	2,125,000		1,625,000
Less: unamortized original issue discount	6,618		6,282
Less: unamortized debt issuance costs	20,428		15,235
Total MTCH debt, net	2,097,954		1,603,483

ANGI debt:
ANGI Term Loan due November 5, 2023	244,063		247,500
Less: current portion of ANGI Term Loan	13,750		13,750
Less: unamortized debt issuance costs	1,670		1,804
Total ANGI debt, net	228,643		231,946

IAC debt:
0.875% Exchangeable Senior Notes due October 1, 2022 (the "2022 Exchangeable Notes"); interest payable each April 1 and October 1	517,500		517,500
0.875% Exchangeable Senior Notes due June 15, 2026 (the "2026 Exchangeable Notes"); interest payable each June 15 and December 15	575,000		575,000
2.00% Exchangeable Senior Notes due January 15, 2030 (the "2030 Exchangeable Notes"); interest payable each January 15 and July 15	575,000		575,000
Total IAC long-term debt	1,667,500		1,667,500
Less: unamortized original issue discount	340,688		351,605
Less: unamortized debt issuance costs	28,401		29,752
Total IAC debt, net	1,298,411		1,286,143

Total long-term debt, net	$	3,625,008	$	3,121,572

MTCH Senior Notes

The 6.375% MTCH Senior Notes were issued on June 1, 2016 and are currently redeemable. These notes may be redeemed at redemption prices set forth in the indenture governing the notes, together with accrued and unpaid interest thereon to the applicable redemption date.

The 5.00% MTCH Senior Notes were issued on December 4, 2017. At any time prior to December 15, 2022, these notes may be redeemed at a redemption price equal to the sum of the principal amount thereof, plus accrued and unpaid interest and a make-whole premium set forth in the indenture governing the notes. Thereafter, these notes may be redeemed at redemption prices set forth in the indenture governing the notes, together with accrued and unpaid interest thereon to the applicable redemption date.

The 5.625% MTCH Senior Notes were issued on February 15, 2019. The proceeds were used to repay outstanding borrowings under the MTCH Credit Facility, to pay expenses associated with the offering, and for general corporate purposes. At any time prior to February 15, 2024, these notes may be redeemed at a redemption price equal to the sum of the principal amount thereof, plus accrued and unpaid interest and a make-whole premium set forth in the indenture governing the notes. Thereafter, these notes may be redeemed at redemption prices set forth in the indenture governing the notes, together with accrued and unpaid interest thereon to the applicable redemption date.

The 4.125% MTCH Senior Notes were issued on February 11, 2020. The proceeds from the offering will be used to fund a portion of the cash consideration of $3.00 per MTCH common share that will be payable in connection with the Separation. If the Separation is not consummated, the proceeds will be used by MTCH for general corporate purposes. At any time prior to May 1, 2025, these notes may be redeemed at a redemption price equal to the sum of the principal amount thereof, plus accrued and unpaid interest and a make-whole premium set forth in the indenture governing the notes. Thereafter, these notes may be redeemed at redemption prices set forth in the indenture governing the notes, together with accrued and unpaid interest thereon to the applicable redemption date.

The indentures governing the 6.375% and 5.00% MTCH Senior Notes contain covenants that would limit MTCH's ability to pay dividends, make distributions or repurchase MTCH stock in the event a default has occurred or MTCH's consolidated leverage ratio (as defined in the indentures) exceeds 5.0 to 1.0. At March 31, 2020, there were no limitations pursuant thereto. There are additional covenants in these indentures that limit MTCH's ability and the ability of its subsidiaries to, among other things, (i) incur indebtedness, make investments, or sell assets in the event MTCH is not in compliance with certain ratios set forth in the indentures, and (ii) incur liens, enter into agreements restricting MTCH subsidiaries' ability to pay dividends, enter into transactions with affiliates and consolidate, merge or sell substantially all of their assets. The indentures governing the 5.625% and 4.125% MTCH Senior Notes are less restrictive than the indentures governing the 6.375% and 5.00% MTCH Senior Notes and generally only limits MTCH's ability and the ability of its subsidiaries to, among other things, create liens on assets and limits MTCH's ability to consolidate, merge, sell or otherwise dispose of all or substantially all of its assets.

MTCH's Senior Notes are ranked equally with each other.

MTCH Term Loan and MTCH Credit Facility

At both March 31, 2020 and December 31, 2019, the outstanding balance on the MTCH Term Loan was $425 million. On February 13, 2020, the MTCH Term Loan was amended to reprice the outstanding balance to LIBOR plus 1.75% and extend its maturity to February 13, 2027. Prior to the amendment, the MTCH Term Loan bore interest at LIBOR plus 2.50%. The interest rate was 3.46% and 4.44% at March 31, 2020 and December 31, 2019, respectively. The MTCH Term Loan provides for annual principal payments as part of an excess cash flow sweep provision, the amount of which, if any, is governed by the secured net leverage ratio contained in the credit agreement. Interest payments are due at least quarterly through the term of the loan.

At March 31, 2020, MTCH has a $750 million revolving credit facility (the "MTCH Credit Facility"). On February 13, 2020, the MTCH Credit Facility was amended to increase the available borrowing capacity from $500 million to $750 million, reduce interest rate margins by 0.125%, and extend its maturity from December 7, 2023 to February 13, 2025. At March 31, 2020 and December 31, 2019, there were no outstanding borrowings under the MTCH Credit Facility. The annual commitment fee on undrawn funds is based on the current consolidated net leverage ratio and was 30 basis points and 25 basis points at March 31, 2020 and December 31, 2019, respectively. Borrowings under the MTCH Credit Facility bear interest, at MTCH's option, at a base rate or LIBOR, in each case plus an applicable margin, which is based on MTCH's consolidated net leverage ratio. The terms of the MTCH Credit Facility require MTCH to maintain a consolidated net leverage ratio of not more than 5.0 to 1.0.

The MTCH Term Loan and MTCH Credit Facility contain covenants that would limit MTCH’s ability to pay dividends, make distributions or repurchase MTCH stock in the event MTCH’s secured net leverage ratio exceeds 2.0 to 1.0, while the MTCH Term Loan remains outstanding and, thereafter, if the consolidated net leverage ratio exceeds 4.0 to 1.0, or in the event a default has occurred. At March 31, 2020, there were no limitations pursuant thereto. There are additional covenants under these MTCH debt agreements that limit the ability of MTCH and its subsidiaries to, among other things, incur indebtedness, pay dividends or make distributions. Obligations under the MTCH Credit Facility and MTCH Term Loan are unconditionally guaranteed by certain MTCH wholly-owned domestic subsidiaries and are also secured by the stock of certain MTCH domestic and foreign subsidiaries. The MTCH Term Loan and outstanding borrowings, if any, under the MTCH Credit Facility rank equally with each other, and have priority over the MTCH Senior Notes to the extent of the value of the assets securing the borrowings under the MTCH credit agreement.

ANGI Term Loan and ANGI Credit Facility

The outstanding balance of the ANGI Term Loan was $244.1 million and $247.5 million at March 31, 2020 and December 31, 2019, respectively. There are quarterly principal payments of $3.4 million through December 31, 2021, $6.9 million for the one-year period ending December 31, 2022 and $10.3 million through maturity of the loan when the final amount of $161.6 million is due. Additionally, interest payments are due at least quarterly through the term of the loan. At both March 31, 2020 and December 31, 2019, the ANGI Term Loan bore interest at LIBOR plus 1.50%, or 2.28% and 3.25%, respectively. The spread over LIBOR is subject to change in future periods based on ANGI's consolidated net leverage ratio.

The terms of the ANGI Term Loan require ANGI to maintain a consolidated net leverage ratio of not more than 4.5 to 1.0 and a minimum interest coverage ratio of not less than 2.0 to 1.0 (in each case as defined in the credit agreement). The ANGI Term Loan also contains covenants that would limit ANGI’s ability to pay dividends, make distributions or repurchase ANGI stock in the event a default has occurred or ANGI’s consolidated net leverage ratio exceeds 4.25 to 1.0. At March 31, 2020, there were no limitations pursuant thereto. There are additional covenants under the ANGI Term Loan that limit the ability of ANGI and its subsidiaries to, among other things, incur indebtedness, pay dividends or make distributions.

The $250 million revolving credit facility (the "ANGI Credit Facility") expires on November 5, 2023. At March 31, 2020 and December 31, 2019, there were no outstanding borrowings under the ANGI Credit Facility. The annual commitment fee on undrawn funds is based on ANGI's consolidated net leverage ratio most recently reported and was 25 basis points at both March 31, 2020 and December 31, 2019. Borrowings under the ANGI Credit Facility bear interest, at ANGI's option, at either a base rate or LIBOR, in each case plus an applicable margin, which is based on ANGI's consolidated net leverage ratio. The financial and other covenants are the same as those for the ANGI Term Loan.

The ANGI Term Loan and ANGI Credit Facility are guaranteed by ANGI's wholly-owned material domestic subsidiaries and are secured by substantially all assets of ANGI and the guarantors, subject to certain exceptions.

IAC Exchangeable Notes

On October 2, 2017, IAC FinanceCo, Inc., a direct, wholly-owned subsidiary of the Company issued $517.5 million aggregate principal amount of its 2022 Exchangeable Notes. During 2019, IAC FinanceCo 2, Inc. and IAC FinanceCo 3, Inc., direct, wholly-owned subsidiaries of the Company, issued $575.0 million aggregate principal amount of its 2026 Exchangeable Notes and $575.0 million aggregate principal amount of its 2030 Exchangeable Notes, respectively.

The 2022, 2026 and 2030 Exchangeable Notes (collectively the "Exchangeable Notes") are guaranteed by the Company.

The following table presents detail of the exchangeable feature:



	Number of shares of the Company's Common Stock into which each $1,000 of Principal of the Exchangeable Notes is Exchangeable*	Approximate Equivalent Exchange Price per Share*		Exchangeable Date
2022 Exchangeable Notes	6.5713	$	152.18	July 1, 2022
2026 Exchangeable Notes	3.3028	$	302.77	March 15, 2026
2030 Exchangeable Notes	3.4323	$	291.35	October 15, 2029

_____________________

* Subject to adjustment upon the occurrence of specified events.

The Exchangeable Notes are exchangeable under the following circumstances:

(1) during any calendar quarter (and only during such calendar quarter), if the last reported sale price of the Company's common stock for at least 20 trading days during the period of 30 consecutive trading days during the immediately preceding calendar quarter is greater than or equal to 130% of the exchange price on each applicable trading day;

(2) during the five-business day period after any five-consecutive trading day period in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company's common stock and the exchange rate on each such trading day;

(3) if the issuer calls the notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or

(4) upon the occurrence of specified corporate events as further described under the indentures governing the respective Exchangeable Notes.

On or after the respective exchangeable dates noted in the table above, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may exchange all or any portion of their Exchangeable Notes regardless of the foregoing conditions. Upon exchange, the Company, in its sole discretion, has the option to settle the Exchangeable Notes with any of the three following alternatives: (1) shares of the Company's common stock, (2) cash or (3) a combination of cash and shares of the Company's common stock. It is the Company's intention to settle the Exchangeable Notes with cash equal to the face amount of the notes upon exchange; any shares issued would be offset by shares received upon exercise of the Exchangeable Note Hedges (described below).

The Company’s 2022 Exchangeable Notes are currently exchangeable; during the three months ended March 31, 2020, no notes were exchanged. The if-converted value of the 2022 Exchangeable Notes exceeded its principal amount of $517.5 million by $92.0 million and $329.6 million based on the Company's stock price on March 31, 2020 and December 31, 2019, respectively. Any dilution arising from the 2022 Exchangeable Notes would be mitigated by the 2022 Exchangeable Notes Hedge.

Additionally, each of IAC FinanceCo 2, Inc. and IAC FinanceCo 3, Inc. may redeem for cash all or any portion of its applicable notes, at its option, on or after June 20, 2023 and July 20, 2026, respectively, if the last reported sale price of the common stock underlying the respective notes has been at least 130% of the exchange price then in effect for at least 20 trading days (whether or not consecutive), including at least one of the five trading days immediately preceding the date on which the notice of redemption is provided, during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which the applicable issuer provides notice of redemption, at a redemption price equal to 100% of the principal amount to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date.

The Company separately accounts for the debt and equity components of the Exchangeable Notes, and therefore, the Company recorded an original issue discount and corresponding increase to additional paid-in capital, which is the fair value attributed to the exchange feature of each series of debt at issuance. The Company is amortizing the original issue discount and debt issuance costs utilizing the effective interest method over the life of the Exchangeable Notes. The effective interest rates for the 2022, 2026 and 2030 Exchangeable Notes are 4.73%, 5.35% and 6.59%, respectively.

The following table sets forth the components of the Exchangeable Notes as of March 31, 2020 and December 31, 2019 (in thousands):



	March 31, 2020
	2022 Exchangeable Notes		2026 Exchangeable Notes		2030 Exchangeable Notes
Liability component:
Principal	$	517,500	$	575,000	$	575,000
Less: unamortized original issue discount	37,314		124,820		178,554
Net carrying value of the liability component	$	480,186	$	450,180	$	396,446

Equity component	$	70,363	$	138,796	$	189,213

	December 31, 2019
	2022 Exchangeable Notes		2026 Exchangeable Notes		2030 Exchangeable Notes
Liability component:
Principal	$	517,500	$	575,000	$	575,000
Less: unamortized original issue discount	40,768		129,037		181,800
Net carrying value of the liability component	$	476,732	$	445,963	$	393,200

Equity component	$	70,363	$	138,796	$	189,213

The following table sets forth interest expense recognized related to the Exchangeable Notes (in thousands):



	Three Months Ended March 31, 2020
	2022 Exchangeable Notes		2026 Exchangeable Notes		2030 Exchangeable Notes
Contractual interest expense	$	1,132	$	1,258	$	2,875
Amortization of original issue discount	3,454		4,217		3,246
Amortization of debt issuance costs	855		319		176
Total interest expense recognized	$	5,441	$	5,794	$	6,297



	Three Months Ended March 31, 2019
	2022 Exchangeable Notes
Contractual interest expense	$	1,132
Amortization of original issue discount	3,363
Amortization of debt issuance costs	871
Total interest expense recognized	$	5,366

Exchangeable Notes Hedge and Warrants

In connection with the Exchangeable Notes offerings, the Company purchased call options allowing the Company to purchase initially (subject to adjustment upon the occurrence of specified events) the same number of shares that would be issuable upon the exchange of the applicable Exchangeable Notes at the price per share set forth below (the "Exchangeable

Notes Hedge"), and sold warrants allowing the counterparty to purchase (subject to adjustment upon the occurrence of specified events) shares at the per share price set forth below (the "Exchangeable Notes Warrants").

The Exchangeable Notes Hedges are expected to reduce the potential dilutive effect on the Company's common stock upon any exchange of notes and/or offset any cash payment IAC FinanceCo, Inc., IAC FinanceCo 2, Inc. or IAC FinanceCo 3, Inc. is required to make in excess of the principal amount of the exchanged notes. The Exchangeable Notes Warrants have a dilutive effect on the Company's common stock to the extent that the market price per share of the Company common stock exceeds their respective strike prices.

The following tables presents details of the Exchangeable Notes Hedges and Warrants (shares in millions):



	Number of Shares*	Approximate Equivalent Exchange Price per Share*
2022 Exchangeable Notes Hedge	3.4	$	152.18
2026 Exchangeable Notes Hedge	1.9	$	302.77
2030 Exchangeable Notes Hedge	2.0	$	291.35



	Number of Shares*	Strike Price per Share*
2022 Exchangeable Notes Warrants	3.4	$	229.70
2026 Exchangeable Notes Warrants	1.9	$	457.02
2030 Exchangeable Notes Warrants	2.0	$	457.02

_____________________

* Subject to adjustment upon the occurrence of specified events.

IAC Credit Facility

At March 31, 2020, IAC had a $250 million revolving credit facility (the "IAC Credit Facility"), under which IAC Group, LLC, a subsidiary of the Company, is the borrower ("Borrower"), that expires on November 5, 2023. At March 31, 2020 and December 31, 2019, there were no outstanding borrowings under the IAC Credit Facility. The annual commitment fee on undrawn funds is based on the consolidated net leverage ratio (as defined in the agreement) most recently reported and was 20 basis points at both March 31, 2020 and December 31, 2019. Borrowings under the IAC Credit Facility bear interest, at the Borrower's option, at a base rate or LIBOR, in each case, plus an applicable margin, which is based on the Borrower's consolidated net leverage ratio. The terms of the IAC Credit Facility require that the Borrower maintains a consolidated net leverage ratio of not more than 3.25 to 1.0 before the date on which the Borrower no longer holds majority of the outstanding voting stock of each of ANGI and MTCH ("Trigger Date") and no greater than 2.75 to 1.0 on or after the Trigger Date. The terms of the IAC Credit Facility also restrict the Company's ability to incur additional indebtedness. Borrowings under the IAC Credit Facility are unconditionally guaranteed by certain of the Company's wholly-owned domestic subsidiaries and are also secured by the stock of certain of its domestic and foreign subsidiaries, including the shares of MTCH and ANGI owned by the Borrower.

Long-term Debt Maturities

Long-term debt maturities as of March 31, 2020 are summarized in the table below:



	(In thousands)
Remainder of 2020	$	10,313
2021	13,750
2022	545,000
2023	192,500
2024	400,000
Thereafter	2,875,000
Total	4,036,563
Less: current portion of long-term debt	13,750
Less: unamortized original issue discount	347,306
Less: unamortized debt issuance costs	50,499
Total long-term debt, net	$	3,625,008

ACCUMULATED OTHER COMPREHENSIVE LOSS

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

ACCUMULATED OTHER COMPREHENSIVE LOSS

The following tables present the components of accumulated other comprehensive (loss) income and items reclassified out of accumulated other comprehensive loss into earnings:



	Three Months Ended March 31, 2020
	Foreign Currency Translation Adjustment			Unrealized Losses On Available-For-Sale Debt Securities			Accumulated Other Comprehensive Loss
	(In thousands)
Balance as of January 1	$	(136,349	)	$	—		$	(136,349	)
Other comprehensive loss before reclassifications	(21,307		)	(12		)	(21,319		)
Amounts reclassified to earnings	(20		)	—			(20		)
Net current period other comprehensive loss	(21,327		)	(12		)	(21,339		)
Allocation of accumulated other comprehensive loss related to noncontrolling interests	403			—			403
Balance as of March 31	$	(157,273	)	$	(12	)	$	(157,285	)



	Three Months Ended March 31, 2019
	Foreign Currency Translation Adjustment			Unrealized Gains On Available-For-Sale Debt Securities		Accumulated Other Comprehensive (Loss) Income
	(In thousands)
Balance as of January 1	$	(128,726	)	$	4	$	(128,722	)
Other comprehensive income	993			2		995
Net current period other comprehensive income	993			2		995
Allocation of accumulated other comprehensive income related to noncontrolling interests	1,008			—		1,008
Balance as of March 31	$	(126,725	)	$	6	$	(126,719	)

At both March 31, 2020 and 2019, there was no tax benefit or provision on the accumulated other comprehensive loss.

(LOSS) EARNINGS PER SHARE

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

(LOSS) EARNINGS PER SHARE

The following table sets forth the computation of basic and diluted (loss) earnings per share attributable to IAC shareholders:



	Three Months Ended March 31,
	2020						2019
	Basic			Diluted			Basic			Diluted
	(In thousands, except per share data)
Numerator:
Net (loss) earnings	$	(182,643	)	$	(182,643	)	$	112,985		$	112,985
Net earnings attributable to noncontrolling interests	(28,397		)	(28,397		)	(24,290		)	(24,290		)
Impact from public subsidiaries' dilutive securities ^(b)	—			—			—			(6,696		)
Net (loss) earnings attributable to IAC shareholders	$	(211,040	)	$	(211,040	)	$	88,695		$	81,999

Denominator:
Weighted average basic shares outstanding	84,839			84,839			83,905			83,905
Dilutive securities^{(a) (b) (c) (d) (e)}	—			—			—			6,435
Denominator for earnings per share—weighted average shares ^{(a) (b) (c) (d) (e)}	84,839			84,839			83,905			90,340

(Loss) earnings per share attributable to IAC shareholders:
(Loss) earnings per share	$	(2.49	)	$	(2.49	)	$	1.06		$	0.91

_____________________


^(a)	For the three months ended March 31, 2020, the Company had a loss from operations and as a result, approximately 19.7 million potentially dilutive securities were excluded from computing dilutive earnings per share because the impact would have been anti-dilutive. Accordingly, the weighted average basic shares outstanding were used to compute all earnings per share amounts.

^(b)

IAC has the option to settle certain MTCH and ANGI stock-based awards in its shares. For the three months ended March 31, 2020, the Company had a loss from operations, therefore, the impact on earnings related to MTCH and ANGI's dilutive securities under the if-converted method are excluded as the impact is anti-dilutive. For the three months ended March 31, 2019, it is more dilutive for IAC to settle these ANGI equity awards and MTCH to settle these MTCH equity awards.

^(c)

If the effect is dilutive, weighted average common shares outstanding include the incremental shares that would be issued upon the assumed exercise of stock options, warrants and subsidiary denominated equity, exchange of the Company's Exchangeable Notes and vesting of restricted stock units ("RSUs"). For the three months ended March 31, 2019, 3.4 million potentially dilutive securities are excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive.

^(d)

Market-based awards and performance-based stock units ("PSUs") are considered contingently issuable shares. Shares issuable upon exercise or vesting of market-based awards and PSUs are included in the denominator for earnings per share if (i) the applicable market or performance condition(s) has been met and (ii) the inclusion of the market-based awards and PSUs is dilutive for the respective reporting periods. For the three months ended March 31, 2019, 0.3 million shares underlying market-based awards and PSUs were excluded from the calculation of diluted earnings per share because the market or performance conditions had not been met.

^(e)

It is the Company's intention to settle the Exchangeable Notes through a combination of cash, equal to the face amount of the notes, and shares; therefore, the Exchangeable Notes are only dilutive for periods during which the average price of IAC common stock exceeds the approximate $152.18, $302.77 and $291.35 per share exchange price per $1,000 principal amount of the 2022 Exchangeable Notes, the 2026 Exchangeable Notes and the 2030 Exchangeable Notes, respectively. The average price of IAC common stock was $207.01 for the three months ended March 31, 2019 and the dilutive impact of the 2022 Exchangeable Notes, which was the only series of Exchangeable Notes that was outstanding for the period, was 0.9 million shares.

SEGMENT INFORMATION

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

SEGMENT INFORMATION

The overall concept that the Company employs in determining its operating segments is to present the financial information in a manner consistent with: how the chief operating decision maker views the businesses; how the businesses are organized as to segment management; and the focus of the businesses with regards to the types of services or products offered or the target market. Operating segments are combined for reporting purposes if they meet certain aggregation criteria, which principally relate to the similarity of their economic characteristics or, in the case of the Emerging & Other reportable segment, do not meet the quantitative thresholds that require presentation as separate reportable segments.

The following table presents revenue by reportable segment:



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Revenue:
Match Group	$	544,642		$	464,625
ANGI Homeservices	343,650			303,443
Vimeo	56,968			43,581
Dotdash	44,120			33,961
Applications	104,148			143,549
Emerging & Other	135,305			116,748
Inter-segment eliminations	(68		)	(64		)
Total	$	1,228,765		$	1,105,843

The following table presents the revenue of the Company's segments disaggregated by type of service:



	Three Months Ended March 31,
	2020		2019
	(In thousands)
Match Group
Direct revenue:
North America	$	263,347	$	237,773
International	271,477		216,189
Total Direct revenue	534,824		453,962
Indirect revenue (principally advertising revenue)	9,818		10,663
Total Match Group revenue	$	544,642	$	464,625

ANGI Homeservices
Marketplace:
Consumer connection revenue	$	239,830	$	201,582
Service professional membership subscription revenue	14,115		16,517
Other revenue	4,831		2,401
Total Marketplace revenue	258,776		220,500
Advertising and other revenue	65,356		61,494
Total North America revenue	324,132		281,994
Consumer connection revenue	15,689		17,123
Service professional membership subscription revenue	3,299		3,742
Advertising and other revenue	530		584



	Three Months Ended March 31,
	2020		2019
	(In thousands)
Total Europe revenue	19,518		21,449
Total ANGI Homeservices revenue	$	343,650	$	303,443

Vimeo
Platform revenue	$	56,968	$	41,302
Hardware revenue	—		2,279
Total Vimeo revenue	$	56,968	$	43,581

Dotdash
Display advertising revenue	$	29,889	$	26,008
Performance marketing revenue	14,231		7,953
Total Dotdash revenue	$	44,120	$	33,961

Applications
Desktop:
Advertising revenue:
Google advertising revenue	$	46,091	$	88,050
Non-Google advertising revenue	3,223		3,348
Total advertising revenue	49,314		91,398
Subscription and other revenue	4,157		4,588
Total Desktop revenue	53,471		95,986
Mosaic Group:
Subscription and other revenue	49,071		45,148
Advertising revenue	1,606		2,415
Total Mosaic Group revenue	50,677		47,563
Total Applications revenue	$	104,148	$	143,549

Emerging & Other
Advertising revenue:
Google advertising revenue	$	81,968	$	96,273
Non-Google advertising revenue	22,261		7,176
Total advertising revenue	104,229		103,449
Other revenue	31,076		13,299
Total Emerging & Other revenue	$	135,305	$	116,748

Revenue by geography is based on where the customer is located. Geographic information about revenue and long-lived assets is presented below:



	Three Months Ended March 31,
	2020		2019
	(In thousands)
Revenue:
United States	$	787,340	$	712,381
All other countries	441,425		393,462
Total	$	1,228,765	$	1,105,843



	March 31, 2020		December 31, 2019
	(In thousands)
Long-lived assets (excluding goodwill, intangible assets and ROU assets):
United States	$	348,146	$	345,937
All other countries	25,415		25,416
Total	$	373,561	$	371,353

The following tables present operating income (loss) and Adjusted EBTIDA by reportable segment:



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Operating income (loss):
Match Group	$	134,681		$	118,828
ANGI Homeservices	(16,296		)	(3,641		)
Vimeo	(14,589		)	(17,784		)
Dotdash	2,411			3,047
Applications	(218,588		)	25,356
Emerging & Other	(19,845		)	(2,520		)
Corporate	(45,554		)	(43,413		)
Total	$	(177,780	)	$	79,873



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Adjusted EBITDA ^(a):
Match Group	$	171,502		$	155,067
ANGI Homeservices	$	34,397		$	37,179
Vimeo	$	(11,408	)	$	(16,200	)
Dotdash	$	7,011		$	7,150
Applications	$	10,151		$	29,688
Emerging & Other	$	(16,980	)	$	(2,095	)
Corporate	$	(31,398	)	$	(20,220	)

_____________________

^(a)

The Company's primary financial measure is Adjusted EBITDA, which is defined as operating income excluding: (1) stock-based compensation expense; (2) depreciation; and (3) acquisition-related items consisting of (i) amortization of intangible assets and impairments of goodwill and intangible assets, if applicable, and (ii) gains and losses recognized on changes in the fair value of contingent consideration arrangements. The Company believes this measure is useful for analysts and investors as this measure allows a more meaningful comparison between the Company's performance and that of its competitors. The above items are excluded from the Company's Adjusted EBITDA measure because these items are non-cash in nature. Adjusted EBITDA has certain limitations because it excludes the impact of these expenses.

The following tables reconcile operating income (loss) for the Company's reportable segments and net (loss) earnings attributable to IAC shareholders to Adjusted EBITDA:



	Three Months Ended March 31, 2020
	Operating Income (Loss)			Stock-Based Compensation Expense		Depreciation		Amortization of Intangibles		Acquisition-related Contingent Consideration Fair Value Adjustments			Goodwill Impairment		Adjusted EBITDA
	(In thousands)
Match Group	$	134,681		$	21,172	$	9,246	$	6,403	$	—		$	—	$	171,502
ANGI Homeservices	(16,296		)	$	25,575	$	12,138	$	12,980	$	—		$	—	$	34,397
Vimeo	(14,589		)	$	—	$	58	$	3,123	$	—		$	—	$	(11,408	)
Dotdash	2,411			$	—	$	210	$	4,390	$	—		$	—	$	7,011
Applications	(218,588		)	$	—	$	237	$	22,811	$	(6,282	)	$	211,973	$	10,151
Emerging & Other	(19,845		)	$	25	$	385	$	2,455	$	—		$	—	$	(16,980	)
Corporate	(45,554		)	$	11,692	$	2,464	$	—	$	—		$	—	$	(31,398	)
Total	(177,780		)
Interest expense	(44,866		)
Other expense, net	(49,893		)
Loss before income taxes	(272,539		)
Income tax benefit	89,896
Net loss	(182,643		)
Net earnings attributable to noncontrolling interests	(28,397		)
Net loss attributable to IAC shareholders	$	(211,040	)



	Three Months Ended March 31, 2019
	Operating Income (Loss)			Stock-Based Compensation Expense		Depreciation		Amortization of Intangibles		Acquisition-related Contingent Consideration Fair Value Adjustments		Adjusted EBITDA
	(In thousands)
Match Group	$	118,828		$	27,997	$	7,831	$	411	$	—	$	155,067
ANGI Homeservices	(3,641		)	$	19,282	$	6,999	$	14,539	$	—	$	37,179
Vimeo	(17,784		)	$	—	$	193	$	1,391	$	—	$	(16,200	)
Dotdash	3,047			$	—	$	226	$	3,877	$	—	$	7,150
Applications	25,356			$	—	$	419	$	2,384	$	1,529	$	29,688
Emerging & Other	(2,520		)	$	—	$	275	$	150	$	—	$	(2,095	)
Corporate	(43,413		)	$	20,165	$	3,028	$	—	$	—	$	(20,220	)
Total	79,873
Interest expense	(31,143		)
Other income, net	651
Earnings before income taxes	49,381
Income tax benefit	63,604
Net earnings	112,985
Net earnings attributable to noncontrolling interests	(24,290		)
Net earnings attributable to IAC shareholders	$	88,695

CONSOLIDATED FINANCIAL STATEMENT DETAILS

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

CONSOLIDATED FINANCIAL STATEMENT DETAILS

Cash and Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the consolidated balance sheet to the total amounts shown in the consolidated statement of cash flows:



	March 31, 2020		December 31, 2019		March 31, 2019		December 31, 2018
	(In thousands)
Cash and cash equivalents	$	2,822,729	$	3,139,295	$	2,217,337	$	2,131,632
Restricted cash included in other current assets	867		654		1,635		1,633
Restricted cash included in other assets	398		409		416		420
Total cash and cash equivalents and restricted cash as shown on the consolidated statement of cash flows	$	2,823,994	$	3,140,358	$	2,219,388	$	2,133,685

Restricted cash at March 31, 2020 and December 31, 2019 primarily consists of a deposit related to corporate credit cards.

Restricted cash at March 31, 2019 and December 31, 2018 primarily consists of a cash collateralized letter of credit and a deposit related to corporate credit cards.

Accumulated Amortization and Depreciation

The following table provides the accumulated amortization and depreciation within the consolidated balance sheet:



Asset Category	March 31, 2020		December 31, 2019
	(In thousands)
Right-of-use assets (included in "other non-current assets")	$	59,237	$	47,815
Property, capitalized software and equipment	$	335,766	$	324,359
Intangible assets	$	237,567	$	215,198

Other (expense) income, net



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Other (expense) income, net	$	(49,893	)	$	651

Other expense, net in 2020 includes: $51.5 million in impairments (downward adjustments) related to investments in equity securities without readily determinable fair values and $7.5 million in impairments of a note receivable and a warrant related to certain investees due to the impact of COVID-19; and $10.1 million of interest income.

Other income, net in 2019 includes: $12.4 million of interest income; $8.1 million loss related to the sale of a business; and $1.9 million in net foreign currency exchange losses due primarily to the weakening of the U.S. dollar and the Euro relative to the British Pound during the three months ended March 31, 2019.

CONTINGENCIES	3 Months Ended
CONTINGENCIES	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	CONTINGENCIES In the ordinary course of business, the Company is a party to various lawsuits. The Company establishes reserves for specific legal matters when it determines that the likelihood of an unfavorable outcome is probable and the loss is reasonably estimable. Management has also identified certain other legal matters where the Company believes an unfavorable outcome is not probable and, therefore, no reserve is established. Although management currently believes that resolving claims against the Company, including claims where an unfavorable outcome is reasonably possible, will not have a material impact on the liquidity, results of operations, or financial condition of the Company, these matters are subject to inherent uncertainties and management's view of these matters may change in the future. The Company also evaluates other contingent matters, including income and non-income tax contingencies, to assess the likelihood of an unfavorable outcome and estimated extent of potential loss. It is possible that an unfavorable outcome of one or more of these lawsuits or other contingencies could have a material impact on the liquidity, results of operations, or financial condition of the Company. See "Note 2—Income Taxes" for additional information related to income tax contingencies. Tinder Optionholder Litigation against IAC and Match Group On August 14, 2018, ten then-current and former employees of Match Group, LLC or Tinder, Inc. ("Tinder"), an operating business of Match Group, filed a lawsuit in New York state court against IAC and Match Group. See Sean Rad et al. v. IAC/InterActiveCorp and Match Group, Inc., No. 654038/2018 (Supreme Court, New York County). The complaint alleges that in 2017, the defendants: (i) wrongfully interfered with a contractually established process for the independent valuation of Tinder by certain investment banks, resulting in a substantial undervaluation of Tinder and a consequent underpayment to the plaintiffs upon exercise of their Tinder stock options, and (ii) then wrongfully merged Tinder into Match Group, thereby depriving certain of the plaintiffs of their contractual right to later valuations of Tinder on a stand-alone basis. The complaint asserts claims for breach of contract, breach of the implied covenant of good faith and fair dealing, unjust enrichment, interference with contractual relations (as against Match Group only), and interference with prospective economic advantage, and seeks compensatory damages in the amount of at least $2 billion, as well as punitive damages. On August 31, 2018, four plaintiffs who were still employed by Match Group filed a notice of discontinuance of their claims without prejudice, leaving the six former employees as the remaining plaintiffs. On October 9, 2018, the defendants filed a motion to dismiss the complaint on various grounds, including that the 2017 valuation of Tinder by the investment banks was an expert determination any challenge to which is both time-barred under applicable law and available only on narrow substantive grounds that the plaintiffs have not pleaded in their complaint; the plaintiffs opposed the motion. On June 13, 2019, the court issued a decision and order (i) granting the motion to dismiss the claims for breach of the implied covenant of good faith and fair dealing and for unjust enrichment, (ii) granting the motion to dismiss the merger-related claim for breach of contract as to two of the remaining six plaintiffs, and (iii) otherwise denying the motion to dismiss. On June 21, 2019, the defendants filed a notice of appeal from the trial court’s partial denial of their motion to dismiss, and the parties thereafter briefed the appeal. On October 29, 2019, the Appellate Division, First Department, issued an order affirming the lower court’s decision. On November 22, 2019, the defendants filed a motion for reargument or, in the alternative, leave to appeal the Appellate Division's order to the New York Court of Appeals; the plaintiffs opposed the motion, which remains pending. On June 3, 2019, the defendants filed a second motion to dismiss based upon certain provisions of the plaintiffs' agreement with a litigation funding firm; the plaintiffs opposed the motion, which remains pending. Document discovery in the case is substantially complete; deposition discovery has begun but is currently in hiatus in light of the COVID-19 pandemic. On January 30, 2020, the parties participated in a mediation that did not result in resolution of the matter. IAC and Match Group believe that the allegations in this lawsuit are without merit and will continue to defend vigorously against it.

SUBSEQUENT EVENT	3 Months Ended
SUBSEQUENT EVENT	Mar. 31, 2020
Subsequent Events [Abstract]
SUBSEQUENT EVENT	SUBSEQUENT EVENT On May 6, 2020, IAC filed a registration statement on Form S-3 for an offering to sell from time to time up to $1.5 billion worth of shares of IAC Class M common stock (or New Match common stock). The net proceeds New Match receives pursuant to such sales, if any, will be transferred to New IAC following the closing of the offering (which closing would occur contemporaneously with the consummation of the Separation) and the number of shares of New Match to be received by IAC stockholders will be reduced to reflect the number of New Match shares sold in this offering.

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Nature of Operations IAC operates Vimeo, Dotdash and Care.com, among many other online businesses, and has majority ownership of both Match Group, which includes Tinder, Match, PlentyOfFish, OkCupid and Hinge, and ANGI Homeservices, which includes HomeAdvisor, Angie’s List and Handy.
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles ("GAAP"). The consolidated financial statements include the accounts of the Company, all entities that are wholly-owned by the Company and all entities in which the Company has a controlling financial interest. Intercompany transactions and accounts have been eliminated.
Accounting Estimates	Accounting Estimates Management of the Company is required to make certain estimates, judgments and assumptions during the preparation of its consolidated financial statements in accordance with GAAP. These estimates, judgments and assumptions impact the reported amounts of assets, liabilities, revenue and expenses and the related disclosure of contingent assets and liabilities. Actual results could differ from these estimates. On an ongoing basis, the Company evaluates its estimates and judgments, including those related to: the fair values of cash equivalents and marketable debt securities; the carrying value of accounts receivable, including the determination of the allowance for doubtful accounts; the determination of revenue reserves; the carrying value of right-of-use assets ("ROU assets"); the useful lives and recoverability of definite-lived intangible assets and property, capitalized software and equipment; the recoverability of goodwill and indefinite-lived intangible assets; the fair value of equity securities without readily determinable fair values; contingencies; the fair value of acquisition-related contingent consideration arrangements; unrecognized tax benefits; the valuation allowance for deferred income tax assets; and the fair value of and forfeiture rates for stock-based awards, among others. The Company bases its estimates and judgments on historical experience, its forecasts and budgets and other factors that the Company considers relevant.
Accounting for Investments and Equity Securities	Accounting for Investments in Equity Securities Investments in equity securities, other than those of the Company's consolidated subsidiaries and those accounted for under the equity method, if applicable, are accounted for at fair value or under the measurement alternative of Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, following its adoption on January 1, 2018, with any changes to fair value recognized within other income (expense), net each reporting period. Under the measurement alternative, equity investments without readily determinable fair values are carried at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for identical or similar securities of the same issuer; value is generally determined based on a market approach as of the transaction date. A security will be considered identical or similar if it has identical or similar rights to the equity securities held by the Company. The Company reviews its investments in equity securities without readily determinable fair values for impairment each reporting period when there are qualitative factors or events that indicate possible impairment. Factors the Company considers in making this determination include negative changes in industry and market conditions, financial performance, business prospects, and other relevant events and factors. When indicators of impairment exist, the Company prepares quantitative assessments of the fair value of the its investments in equity securities, which require judgment and the use of estimates. When the Company's assessment indicates that the fair value of the investment is below its carrying value, the Company writes down the investment to its fair value and records the corresponding charge within other income (expense), net. See "Note 4—Financial Instruments and Fair Value Measurements" for additional information on the impairments of certain equity securities without readily determinable fair values recorded in the quarter ended March 31, 2020. In the event the Company has investments in the common stock or in-substance common stock of entities in which the Company has the ability to exercise significant influence over the operating and financial matters of the investee, but does not have a controlling financial interest, are accounted for using the equity method and are included in "Long-term investments" in the accompanying consolidated balance sheet. At March 31, 2020 and December 31, 2019, the Company did not have any investments accounted for using the equity method.
General Revenue Recognition	General Revenue Recognition Revenue is recognized when control of the promised services or goods is transferred to the Company's customers and in the amount that reflects the consideration the Company expects to be entitled to in exchange for those services or goods. The Company's disaggregated revenue disclosures are presented in "Note 8—Segment Information." Prior to January 1, 2020, ANGI's Handy business recorded revenue on a net basis. Effective January 1, 2020, the Company modified the Handy terms and conditions so that Handy, rather than the service professional, has the contractual relationship with the consumer to deliver the service and Handy, rather than the consumer, has the contractual relationship with the service professional. Consumers request services and pay for such services directly through the Handy platform and then Handy fulfills the request with independently established home services providers engaged in a trade, occupation and/or business that customarily provides such services. This change in contractual terms requires gross revenue accounting treatment effective January 1, 2020. Also, in the case of certain tasks, HomeAdvisor provides a pre-priced product offering, pursuant to which consumers can request services through a HomeAdvisor platform and pay HomeAdvisor for the services directly. HomeAdvisor then fulfills the request with independently established home services providers engaged in a trade, occupation and/or business that customarily provides such services. Revenue from HomeAdvisor’s pre-priced product offering is also recorded on a gross basis effective January 1, 2020. In addition to changing the presentation of revenue to gross from net, the timing of revenue recognition will change for pre-priced jobs and will be later than the timing of existing consumer connection revenue for HomeAdvisor because the Company will not be able to record revenue, generally, until the service professional completes the job on the Company's behalf. The change to gross revenue reporting for Handy and HomeAdvisor’s pre-priced product offering, effective January 1, 2020, resulted in an increase in revenue of $15.2 million during the three months ended March 31, 2020. Deferred Revenue Deferred revenue consists of advance payments that are received or are contractually due in advance of the Company's performance. The Company’s deferred revenue is reported on a contract by contract basis at the end of each reporting period. The Company classifies deferred revenue as current when the term of the applicable subscription period or expected completion of the Company's performance obligation is one year or less. The current and non-current deferred revenue balances at December 31, 2019 are $397.5 million and $1.3 million, respectively. During the three months ended March 31, 2020, the Company recognized $258.2 million of revenue that was included in the deferred revenue balance as of December 31, 2019. During the three months ended March 31, 2019, the Company recognized $234.8 million of revenue that was included in the deferred revenue balance as of December 31, 2018. The current and non-current deferred revenue balances at March 31, 2020 are $433.7 million and $1.3 million, respectively. Non-current deferred revenue is included in “Other long-term liabilities” in the accompanying consolidated balance sheet. Practical Expedients and Exemptions As permitted under the practical expedient available under ASU No. 2014-09, Revenue from Contracts with Customers, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less, (ii) contracts with variable consideration that is allocated entirely to unsatisfied performance obligations or to a wholly unsatisfied promise accounted for under the series guidance, and (iii) contracts for which the Company recognizes revenue at the amount which the Company has the right to invoice for services performed. For sales incentive programs where the customer relationship period is one year or less, the Company has elected the practical expedient to expense the costs as incurred.
Certain Risks and Concentrations - Services Agreement with Google	Certain Risks and Concentrations—Services Agreement with Google A meaningful portion of the Company's revenue is attributable to a services agreement with Google (the "Services Agreement"). In addition, the Company earns certain other advertising revenue from Google that is not attributable to the Services Agreement.
Adoption of ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes	Adoption of ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes The Company adopted ASU No. 2019-12 effective January 1, 2020, which simplifies the accounting for income taxes, eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. Most amendments within ASU No. 2019-12 are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. The Company adopted ASU No. 2019-12 on January 1, 2020 using the modified retrospective basis for those amendments that are not applied on a prospective basis. The adoption of ASU No. 2019-12 did not have a material impact on the Company’s consolidated financial statements.
Reclassifications	Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation.

GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill and Intangible Assets, Net

Goodwill and intangible assets, net are as follows:



	March 31,		December 31,
	2020		2019
	(In thousands)
Goodwill	$	3,042,139	$	2,854,462
Intangible assets with indefinite lives	473,208		446,495
Intangible assets with definite lives, net of accumulated amortization	198,259		131,979
Total goodwill and intangible assets, net	$	3,713,606	$	3,432,936

Schedule of Goodwill by Reportable Segment

The following table presents the balance of goodwill by reportable segment, including the changes in the carrying value of goodwill, for the year ended December 31, 2019:



	Balance at December 31, 2018		Additions		(Deductions)			Impairment			Foreign Exchange Translation			Balance at December 31, 2019
	(In thousands)
Match Group	$	1,245,013	$	3,553	$	—		$	—		$	(8,726	)	$	1,239,840
ANGI Homeservices	892,800		18,326		(29,267		)	—			192			882,051
Vimeo	77,152		142,222		—			—			—			219,374
Applications:
Desktop	265,146		—		—			—			—			265,146
Mosaic Group	239,746		—		—			—			(144		)	239,602
Total Applications	504,892		—		—			—			(144		)	504,748
Emerging & Other	7,002		4,765		—			(3,318		)	—			8,449
Total	$	2,726,859	$	168,866	$	(29,267	)	$	(3,318	)	$	(8,678	)	$	2,854,462

The following table presents the balance of goodwill by reportable segment, including the changes in the carrying value of goodwill, for the year ended March 31, 2020:



	Balance at December 31, 2019		Additions		(Deductions)			Impairment			Foreign Exchange Translation			Balance at March 31, 2020
	(In thousands)
Match Group	$	1,239,840	$	—	$	—		$	—		$	(12,108	)	$	1,227,732
ANGI Homeservices	882,051		—		—			—			(4,867		)	877,184
Vimeo	219,374		—		(38		)	—			—			219,336
Applications:
Desktop	265,146		—		—			(211,973		)	—			53,173
Mosaic Group	239,602		—		—			—			(134		)	239,468
Total Applications	504,748		—		—			(211,973		)	(134		)	292,641
Emerging & Other	8,449		416,797		—			—			—			425,246
Total	$	2,854,462	$	416,797	$	(38	)	$	(211,973	)	$	(17,109	)	$	3,042,139

Schedule of Intangible Assets with Definite Lives

At March 31, 2020 and December 31, 2019, intangible assets with definite lives are as follows:



	March 31, 2020
	Gross Carrying Amount		Accumulated Amortization			Net		Weighted-Average Useful Life (Years)
	(In thousands)
Technology	$	203,737	$	(87,442	)	$	116,295	4.7
Service professional relationships	99,850		(83,560		)	16,290		3.0
Customer lists and user base	79,768		(26,804		)	52,964		4.0
Trade names	21,868		(15,544		)	6,324		2.7
Memberships	15,900		(13,264		)	2,636		3.0
Other	14,703		(10,953		)	3,750		3.7
Total	$	435,826	$	(237,567	)	$	198,259	4.0



	December 31, 2019
	Gross Carrying Amount		Accumulated Amortization			Net		Weighted-Average Useful Life (Years)
	(In thousands)
Technology	$	154,052	$	(79,358	)	$	74,694	4.6
Service professional relationships	99,651		(76,445		)	23,206		2.9
Customer lists and user base	44,548		(24,488		)	20,060		3.3
Trade names	19,074		(13,068		)	6,006		3.2
Memberships	15,900		(11,940		)	3,960		3.0
Other	13,952		(9,899		)	4,053		3.7
Total	$	347,177	$	(215,198	)	$	131,979	3.8

Schedule of Expected Amortization of Intangible Assets

At March 31, 2020, amortization of intangible assets with definite lives is estimated to be as follows:



	(In thousands)
Remainder of 2020	$	60,498
2021	45,014
2022	39,859
2023	30,119
2024	15,841
Thereafter	6,928
Total	$	198,259

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Marketable Securities

At March 31, 2020 and December 31, 2019, the fair value of marketable securities are as follows:



	March 31, 2020		December 31, 2019
	(In thousands)
Available-for-sale marketable debt securities	$	49,912	$	19,993
Total marketable securities	$	49,912	$	19,993

Schedule of Current Available-for-sale Marketable Securities

At December 31, 2019, current available-for-sale marketable debt securities were as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Commercial paper	19,993		—		—		19,993
Total available-for-sale marketable debt securities	$	19,993	$	—	$	—	$	19,993

At March 31, 2020, current available-for-sale marketable debt securities are as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
Treasury discount notes	$	49,924	$	—	$	(12	)	$	49,912
Total available-for-sale marketable debt securities	$	49,924	$	—	$	(12	)	$	49,912

Schedule of Realized and Unrealized Gains and Losses



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Upward adjustments (gross unrealized gains)	$	—		$	—
Downward adjustments including impairment (gross unrealized losses)	(51,484		)	(150		)
Total	$	(51,484	)	$	(150	)



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Realized gains, net, for equity securities sold	$	12		$	78
Unrealized losses, net, on equity securities held	(51,484		)	(122		)
Total losses, net recognized in other (expense) income, net	$	(51,472	)	$	(44	)

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables present the Company's financial instruments that are measured at fair value on a recurring basis:



	March 31, 2020
	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)			Total Fair Value Measurements
	(In thousands)
Assets:
Cash equivalents:
Money market funds	$	2,007,519	$	—	$	—		$	2,007,519
Treasury discount notes	—		99,882		—			99,882
Time deposits	—		72,809		—			72,809
Short-term investments	—		20,000		—			20,000
Marketable securities:
Treasury discount notes	—		49,912		—			49,912
Other non-current assets:
Warrant	—		—		6,489			6,489
Total	$	2,007,519	$	242,603	$	6,489		$	2,256,611

Liabilities:
Contingent consideration arrangement	$	—	$	—	$	(636	)	$	(636	)



	December 31, 2019
	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)			Total Fair Value Measurements
	(In thousands)
Assets:
Cash equivalents:
Money market funds	$	2,164,576	$	—	$	—		$	2,164,576
Treasury discount notes	—		199,896		—			199,896
Time deposits	—		128,075		—			128,075
Commercial paper	—		29,960		—			29,960
Marketable securities:
Commercial paper	—		19,993		—			19,993
Other non-current assets:
Warrant	—		—		8,495			8,495
Total	$	2,164,576	$	377,924	$	8,495		$	2,550,995

Liabilities:
Contingent consideration arrangement	$	—	$	—	$	(6,918	)	$	(6,918	)

Schedule of Changes in Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)

The following table presents the changes in the Company's financial instruments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3):



	Three Months Ended March 31,
	2020						2019
	Warrant			Contingent Consideration Arrangements			Contingent Consideration Arrangement
	(In thousands)
Balance at January 1	$	8,495		$	(6,918	)	$	(28,631	)
Total net (losses) gains:
Included in earnings:
Fair value adjustments	(2,006		)	6,282			(1,529		)
Included in other comprehensive loss	—			—			(14		)
Fair value at date of acquisition	—			(1,000		)	—
Settlements	—			1,000			1,988
Balance at March 31	$	6,489		$	(636	)	$	(28,186	)

Schedule of Carrying Value and the Fair Value of Financial Instruments Measured at Fair Value Only for Disclosure Purposes

The following table presents the carrying value and the fair value of financial instruments measured at fair value only for disclosure purposes:



	March 31, 2020						December 31, 2019
	Carrying Value			Fair Value			Carrying Value			Fair Value
	(In thousands)
Current portion of long-term debt	$	(13,750	)	$	(13,750	)	$	(13,750	)	$	(13,681	)
Long-term debt, net^(a)	(3,625,008		)	(4,017,844		)	(3,121,572		)	(4,136,988		)

_____________________

^(a)

At March 31, 2020 and December 31, 2019, the carrying value of long-term debt, net includes unamortized original issue discount and debt issuance costs of $397.8 million and $404.7 million, respectively.

LONG-TERM DEBT (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of Long-term Debt

The following table presents detail of the exchangeable feature:



	Number of shares of the Company's Common Stock into which each $1,000 of Principal of the Exchangeable Notes is Exchangeable*	Approximate Equivalent Exchange Price per Share*		Exchangeable Date
2022 Exchangeable Notes	6.5713	$	152.18	July 1, 2022
2026 Exchangeable Notes	3.3028	$	302.77	March 15, 2026
2030 Exchangeable Notes	3.4323	$	291.35	October 15, 2029

_____________________

* Subject to adjustment upon the occurrence of specified events.

The following table sets forth the components of the Exchangeable Notes as of March 31, 2020 and December 31, 2019 (in thousands):



	March 31, 2020
	2022 Exchangeable Notes		2026 Exchangeable Notes		2030 Exchangeable Notes
Liability component:
Principal	$	517,500	$	575,000	$	575,000
Less: unamortized original issue discount	37,314		124,820		178,554
Net carrying value of the liability component	$	480,186	$	450,180	$	396,446

Equity component	$	70,363	$	138,796	$	189,213

	December 31, 2019
	2022 Exchangeable Notes		2026 Exchangeable Notes		2030 Exchangeable Notes
Liability component:
Principal	$	517,500	$	575,000	$	575,000
Less: unamortized original issue discount	40,768		129,037		181,800
Net carrying value of the liability component	$	476,732	$	445,963	$	393,200

Equity component	$	70,363	$	138,796	$	189,213

The following table sets forth interest expense recognized related to the Exchangeable Notes (in thousands):



	Three Months Ended March 31, 2020
	2022 Exchangeable Notes		2026 Exchangeable Notes		2030 Exchangeable Notes
Contractual interest expense	$	1,132	$	1,258	$	2,875
Amortization of original issue discount	3,454		4,217		3,246
Amortization of debt issuance costs	855		319		176
Total interest expense recognized	$	5,441	$	5,794	$	6,297



	Three Months Ended March 31, 2019
	2022 Exchangeable Notes
Contractual interest expense	$	1,132
Amortization of original issue discount	3,363
Amortization of debt issuance costs	871
Total interest expense recognized	$	5,366

Long-term debt consists of:



	March 31, 2020		December 31, 2019
	(In thousands)
MTCH debt:
MTCH Term Loan due February 13, 2027	$	425,000	$	425,000
6.375% Senior Notes due June 1, 2024 (the "6.375% MTCH Senior Notes"); interest payable each June 1 and December 1	400,000		400,000
5.00% Senior Notes due December 15, 2027 (the "5.00% MTCH Senior Notes"); interest payable each June 15 and December 15	450,000		450,000
5.625% Senior Notes due February 15, 2029 (the "5.625% MTCH Senior Notes"); interest payable each February 15 and August 15	350,000		350,000
4.125% Senior Notes due August 1, 2030 (the "4.125% MTCH Senior Notes"); interest payable each February 1 and August 1; commencing August 1, 2020	500,000		—
Total MTCH long-term debt	2,125,000		1,625,000
Less: unamortized original issue discount	6,618		6,282
Less: unamortized debt issuance costs	20,428		15,235
Total MTCH debt, net	2,097,954		1,603,483

ANGI debt:
ANGI Term Loan due November 5, 2023	244,063		247,500
Less: current portion of ANGI Term Loan	13,750		13,750
Less: unamortized debt issuance costs	1,670		1,804
Total ANGI debt, net	228,643		231,946

IAC debt:
0.875% Exchangeable Senior Notes due October 1, 2022 (the "2022 Exchangeable Notes"); interest payable each April 1 and October 1	517,500		517,500
0.875% Exchangeable Senior Notes due June 15, 2026 (the "2026 Exchangeable Notes"); interest payable each June 15 and December 15	575,000		575,000
2.00% Exchangeable Senior Notes due January 15, 2030 (the "2030 Exchangeable Notes"); interest payable each January 15 and July 15	575,000		575,000
Total IAC long-term debt	1,667,500		1,667,500
Less: unamortized original issue discount	340,688		351,605
Less: unamortized debt issuance costs	28,401		29,752
Total IAC debt, net	1,298,411		1,286,143

Total long-term debt, net	$	3,625,008	$	3,121,572

Schedule of Exchangeable Notes Hedges and Warrants

The following tables presents details of the Exchangeable Notes Hedges and Warrants (shares in millions):



	Number of Shares*	Approximate Equivalent Exchange Price per Share*
2022 Exchangeable Notes Hedge	3.4	$	152.18
2026 Exchangeable Notes Hedge	1.9	$	302.77
2030 Exchangeable Notes Hedge	2.0	$	291.35



	Number of Shares*	Strike Price per Share*
2022 Exchangeable Notes Warrants	3.4	$	229.70
2026 Exchangeable Notes Warrants	1.9	$	457.02
2030 Exchangeable Notes Warrants	2.0	$	457.02

_____________________

* Subject to adjustment upon the occurrence of specified events.

Schedule of Maturities of Long-term Debt

Long-term debt maturities as of March 31, 2020 are summarized in the table below:



	(In thousands)
Remainder of 2020	$	10,313
2021	13,750
2022	545,000
2023	192,500
2024	400,000
Thereafter	2,875,000
Total	4,036,563
Less: current portion of long-term debt	13,750
Less: unamortized original issue discount	347,306
Less: unamortized debt issuance costs	50,499
Total long-term debt, net	$	3,625,008

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 505
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Schedule of Accumulated Other Comprehensive (Loss) Income

The following tables present the components of accumulated other comprehensive (loss) income and items reclassified out of accumulated other comprehensive loss into earnings:



	Three Months Ended March 31, 2020
	Foreign Currency Translation Adjustment			Unrealized Losses On Available-For-Sale Debt Securities			Accumulated Other Comprehensive Loss
	(In thousands)
Balance as of January 1	$	(136,349	)	$	—		$	(136,349	)
Other comprehensive loss before reclassifications	(21,307		)	(12		)	(21,319		)
Amounts reclassified to earnings	(20		)	—			(20		)
Net current period other comprehensive loss	(21,327		)	(12		)	(21,339		)
Allocation of accumulated other comprehensive loss related to noncontrolling interests	403			—			403
Balance as of March 31	$	(157,273	)	$	(12	)	$	(157,285	)



	Three Months Ended March 31, 2019
	Foreign Currency Translation Adjustment			Unrealized Gains On Available-For-Sale Debt Securities		Accumulated Other Comprehensive (Loss) Income
	(In thousands)
Balance as of January 1	$	(128,726	)	$	4	$	(128,722	)
Other comprehensive income	993			2		995
Net current period other comprehensive income	993			2		995
Allocation of accumulated other comprehensive income related to noncontrolling interests	1,008			—		1,008
Balance as of March 31	$	(126,725	)	$	6	$	(126,719	)

(LOSS) EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Earnings (Loss) Per Share

The following table sets forth the computation of basic and diluted (loss) earnings per share attributable to IAC shareholders:



	Three Months Ended March 31,
	2020						2019
	Basic			Diluted			Basic			Diluted
	(In thousands, except per share data)
Numerator:
Net (loss) earnings	$	(182,643	)	$	(182,643	)	$	112,985		$	112,985
Net earnings attributable to noncontrolling interests	(28,397		)	(28,397		)	(24,290		)	(24,290		)
Impact from public subsidiaries' dilutive securities ^(b)	—			—			—			(6,696		)
Net (loss) earnings attributable to IAC shareholders	$	(211,040	)	$	(211,040	)	$	88,695		$	81,999

Denominator:
Weighted average basic shares outstanding	84,839			84,839			83,905			83,905
Dilutive securities^{(a) (b) (c) (d) (e)}	—			—			—			6,435
Denominator for earnings per share—weighted average shares ^{(a) (b) (c) (d) (e)}	84,839			84,839			83,905			90,340

(Loss) earnings per share attributable to IAC shareholders:
(Loss) earnings per share	$	(2.49	)	$	(2.49	)	$	1.06		$	0.91

_____________________


^(a)	For the three months ended March 31, 2020, the Company had a loss from operations and as a result, approximately 19.7 million potentially dilutive securities were excluded from computing dilutive earnings per share because the impact would have been anti-dilutive. Accordingly, the weighted average basic shares outstanding were used to compute all earnings per share amounts.

^(b)

^(c)

^(d)

^(e)

SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

The following tables present operating income (loss) and Adjusted EBTIDA by reportable segment:



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Operating income (loss):
Match Group	$	134,681		$	118,828
ANGI Homeservices	(16,296		)	(3,641		)
Vimeo	(14,589		)	(17,784		)
Dotdash	2,411			3,047
Applications	(218,588		)	25,356
Emerging & Other	(19,845		)	(2,520		)
Corporate	(45,554		)	(43,413		)
Total	$	(177,780	)	$	79,873



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Adjusted EBITDA ^(a):
Match Group	$	171,502		$	155,067
ANGI Homeservices	$	34,397		$	37,179
Vimeo	$	(11,408	)	$	(16,200	)
Dotdash	$	7,011		$	7,150
Applications	$	10,151		$	29,688
Emerging & Other	$	(16,980	)	$	(2,095	)
Corporate	$	(31,398	)	$	(20,220	)

_____________________

^(a)

The following table presents revenue by reportable segment:



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Revenue:
Match Group	$	544,642		$	464,625
ANGI Homeservices	343,650			303,443
Vimeo	56,968			43,581
Dotdash	44,120			33,961
Applications	104,148			143,549
Emerging & Other	135,305			116,748
Inter-segment eliminations	(68		)	(64		)
Total	$	1,228,765		$	1,105,843

Schedule of Disaggregation of Revenue

The following table presents the revenue of the Company's segments disaggregated by type of service:



	Three Months Ended March 31,
	2020		2019
	(In thousands)
Match Group
Direct revenue:
North America	$	263,347	$	237,773
International	271,477		216,189
Total Direct revenue	534,824		453,962
Indirect revenue (principally advertising revenue)	9,818		10,663
Total Match Group revenue	$	544,642	$	464,625

ANGI Homeservices
Marketplace:
Consumer connection revenue	$	239,830	$	201,582
Service professional membership subscription revenue	14,115		16,517
Other revenue	4,831		2,401
Total Marketplace revenue	258,776		220,500
Advertising and other revenue	65,356		61,494
Total North America revenue	324,132		281,994
Consumer connection revenue	15,689		17,123
Service professional membership subscription revenue	3,299		3,742
Advertising and other revenue	530		584



	Three Months Ended March 31,
	2020		2019
	(In thousands)
Total Europe revenue	19,518		21,449
Total ANGI Homeservices revenue	$	343,650	$	303,443

Vimeo
Platform revenue	$	56,968	$	41,302
Hardware revenue	—		2,279
Total Vimeo revenue	$	56,968	$	43,581

Dotdash
Display advertising revenue	$	29,889	$	26,008
Performance marketing revenue	14,231		7,953
Total Dotdash revenue	$	44,120	$	33,961

Applications
Desktop:
Advertising revenue:
Google advertising revenue	$	46,091	$	88,050
Non-Google advertising revenue	3,223		3,348
Total advertising revenue	49,314		91,398
Subscription and other revenue	4,157		4,588
Total Desktop revenue	53,471		95,986
Mosaic Group:
Subscription and other revenue	49,071		45,148
Advertising revenue	1,606		2,415
Total Mosaic Group revenue	50,677		47,563
Total Applications revenue	$	104,148	$	143,549

Emerging & Other
Advertising revenue:
Google advertising revenue	$	81,968	$	96,273
Non-Google advertising revenue	22,261		7,176
Total advertising revenue	104,229		103,449
Other revenue	31,076		13,299
Total Emerging & Other revenue	$	135,305	$	116,748

Schedule of Revenue and Long-lived Assets, Excluding Goodwill and Intangible Assets, by Geography

Revenue by geography is based on where the customer is located. Geographic information about revenue and long-lived assets is presented below:



	Three Months Ended March 31,
	2020		2019
	(In thousands)
Revenue:
United States	$	787,340	$	712,381
All other countries	441,425		393,462
Total	$	1,228,765	$	1,105,843



	March 31, 2020		December 31, 2019
	(In thousands)
Long-lived assets (excluding goodwill, intangible assets and ROU assets):
United States	$	348,146	$	345,937
All other countries	25,415		25,416
Total	$	373,561	$	371,353

Schedule of Reconciliation of Operating Income to Adjusted EBITDA

The following tables reconcile operating income (loss) for the Company's reportable segments and net (loss) earnings attributable to IAC shareholders to Adjusted EBITDA:



	Three Months Ended March 31, 2020
	Operating Income (Loss)			Stock-Based Compensation Expense		Depreciation		Amortization of Intangibles		Acquisition-related Contingent Consideration Fair Value Adjustments			Goodwill Impairment		Adjusted EBITDA
	(In thousands)
Match Group	$	134,681		$	21,172	$	9,246	$	6,403	$	—		$	—	$	171,502
ANGI Homeservices	(16,296		)	$	25,575	$	12,138	$	12,980	$	—		$	—	$	34,397
Vimeo	(14,589		)	$	—	$	58	$	3,123	$	—		$	—	$	(11,408	)
Dotdash	2,411			$	—	$	210	$	4,390	$	—		$	—	$	7,011
Applications	(218,588		)	$	—	$	237	$	22,811	$	(6,282	)	$	211,973	$	10,151
Emerging & Other	(19,845		)	$	25	$	385	$	2,455	$	—		$	—	$	(16,980	)
Corporate	(45,554		)	$	11,692	$	2,464	$	—	$	—		$	—	$	(31,398	)
Total	(177,780		)
Interest expense	(44,866		)
Other expense, net	(49,893		)
Loss before income taxes	(272,539		)
Income tax benefit	89,896
Net loss	(182,643		)
Net earnings attributable to noncontrolling interests	(28,397		)
Net loss attributable to IAC shareholders	$	(211,040	)



	Three Months Ended March 31, 2019
	Operating Income (Loss)			Stock-Based Compensation Expense		Depreciation		Amortization of Intangibles		Acquisition-related Contingent Consideration Fair Value Adjustments		Adjusted EBITDA
	(In thousands)
Match Group	$	118,828		$	27,997	$	7,831	$	411	$	—	$	155,067
ANGI Homeservices	(3,641		)	$	19,282	$	6,999	$	14,539	$	—	$	37,179
Vimeo	(17,784		)	$	—	$	193	$	1,391	$	—	$	(16,200	)
Dotdash	3,047			$	—	$	226	$	3,877	$	—	$	7,150
Applications	25,356			$	—	$	419	$	2,384	$	1,529	$	29,688
Emerging & Other	(2,520		)	$	—	$	275	$	150	$	—	$	(2,095	)
Corporate	(43,413		)	$	20,165	$	3,028	$	—	$	—	$	(20,220	)
Total	79,873
Interest expense	(31,143		)
Other income, net	651
Earnings before income taxes	49,381
Income tax benefit	63,604
Net earnings	112,985
Net earnings attributable to noncontrolling interests	(24,290		)
Net earnings attributable to IAC shareholders	$	88,695

CONSOLIDATED FINANCIAL STATEMENT DETAILS (Tables)

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Cash and Cash Equivalents



	March 31, 2020		December 31, 2019		March 31, 2019		December 31, 2018
	(In thousands)
Cash and cash equivalents	$	2,822,729	$	3,139,295	$	2,217,337	$	2,131,632
Restricted cash included in other current assets	867		654		1,635		1,633
Restricted cash included in other assets	398		409		416		420
Total cash and cash equivalents and restricted cash as shown on the consolidated statement of cash flows	$	2,823,994	$	3,140,358	$	2,219,388	$	2,133,685

Schedule of Accumulated Amortization and Depreciation

The following table provides the accumulated amortization and depreciation within the consolidated balance sheet:



Asset Category	March 31, 2020		December 31, 2019
	(In thousands)
Right-of-use assets (included in "other non-current assets")	$	59,237	$	47,815
Property, capitalized software and equipment	$	335,766	$	324,359
Intangible assets	$	237,567	$	215,198

Schedule of Restricted Cash



	March 31, 2020		December 31, 2019		March 31, 2019		December 31, 2018
	(In thousands)
Cash and cash equivalents	$	2,822,729	$	3,139,295	$	2,217,337	$	2,131,632
Restricted cash included in other current assets	867		654		1,635		1,633
Restricted cash included in other assets	398		409		416		420
Total cash and cash equivalents and restricted cash as shown on the consolidated statement of cash flows	$	2,823,994	$	3,140,358	$	2,219,388	$	2,133,685

Schedule of Other (Expense) Income, Net

Other (expense) income, net



	Three Months Ended March 31,
	2020			2019
	(In thousands)
Other (expense) income, net	$	(49,893	)	$	651

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenue and Other [Line Items]
Goodwill impairment	$ 211,973	$ 0	$ 3,318
Impairment of equity securities without readily determinable fair value	(51,500)
Write-off of notes receivable	(7,500)
Consolidated revenue	1,228,765	1,105,843
Current deferred revenue	433,728		397,490
Non-current deferred revenue	1,300		1,300
Deferred revenue recognized during period	258,200	234,800
Capitalized sales commissions where customer relationship period is greater than one year	47,500		42,400
Accounts receivable related to revenue earned	375,854		298,334
Applications
Revenue and Other [Line Items]
Goodwill impairment	211,973		0
Emerging & Other
Revenue and Other [Line Items]
Goodwill impairment			3,318
Google Inc. \| Revenue \| Customer concentration risk
Revenue and Other [Line Items]
Consolidated revenue	$ 138,900	$ 195,800
Concentration risk (as a percent)	11.00%	18.00%
Google Inc. \| Revenue \| Customer concentration risk \| Applications
Revenue and Other [Line Items]
Consolidated revenue	$ 46,100	$ 88,100
Google Inc. \| Revenue \| Customer concentration risk \| Emerging & Other
Revenue and Other [Line Items]
Consolidated revenue	80,500	$ 94,800
Google Inc. \| Accounts Receivable \| Customer concentration risk
Revenue and Other [Line Items]
Accounts receivable related to revenue earned	$ 48,700		53,000
Match Group
Revenue and Other [Line Items]
Economic interest (as a percent)	80.40%
Voting interest (as a percent)	97.40%
ANGI Homeservices
Revenue and Other [Line Items]
Economic interest (as a percent)	84.90%
Voting interest (as a percent)	98.30%
Desktop \| Applications
Revenue and Other [Line Items]
Goodwill impairment	$ 211,973		$ 0
Impairment of indefinite-lived intangible assets	21,400
Revenue Change \| Handy
Revenue and Other [Line Items]
Consolidated revenue	$ 15,200

INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ (89,896)	$ (63,604)
Unrecognized tax benefits, including interest and penalties	56,200		$ 74,400
Increase (decrease) in unrecognized tax benefits, including interest and penalties during the period	(18,200)
Unrecognized tax benefits, if subsequently recognized would reduce income tax expense	51,100		$ 69,200
Decrease in unrecognized tax benefit, reasonably possible within twelve months	9,900
Decrease in unrecognized tax benefit, reasonably possible within twelve months which would reduce the income tax provision	$ 9,700

GOODWILL AND INTANGIBLE ASSETS - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 3,042,139	$ 2,854,462	$ 2,726,859
Intangible assets with indefinite lives	473,208	446,495
Intangible assets with definite lives, net of accumulated amortization	198,259	131,979
Total goodwill and intangible assets, net	$ 3,713,606	$ 3,432,936

GOODWILL AND INTANGIBLE ASSETS - Goodwill by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Goodwill
Balance at beginning of period	$ 2,854,462	$ 2,726,859	$ 2,726,859
Additions	416,797		168,866
(Deductions)	(38)		(29,267)
Impairment	(211,973)	0	(3,318)
Foreign Exchange Translation	(17,109)		(8,678)
Balance at end of period	3,042,139		2,854,462
Match Group
Goodwill
Balance at beginning of period	1,239,840	1,245,013	1,245,013
Additions			3,553
(Deductions)	0		0
Foreign Exchange Translation	(12,108)		(8,726)
Balance at end of period	1,227,732		1,239,840
ANGI Homeservices
Goodwill
Balance at beginning of period	882,051	892,800	892,800
Additions	0		18,326
(Deductions)	0		(29,267)
Impairment	0		0
Foreign Exchange Translation	(4,867)		192
Balance at end of period	877,184		882,051
Vimeo
Goodwill
Balance at beginning of period	219,374	77,152	77,152
Additions	0		142,222
(Deductions)	(38)		0
Impairment	0		0
Foreign Exchange Translation	0		0
Balance at end of period	219,336		219,374
Applications
Goodwill
Balance at beginning of period	504,748	504,892	504,892
Additions	0		0
(Deductions)	0		0
Impairment	(211,973)		0
Foreign Exchange Translation	(134)		(144)
Balance at end of period	292,641		504,748
Applications \| Desktop
Goodwill
Balance at beginning of period	265,146	265,146	265,146
Additions	0		0
(Deductions)	0		0
Impairment	(211,973)		0
Foreign Exchange Translation	0		0
Balance at end of period	53,173		265,146
Applications \| Mosaic Group
Goodwill
Balance at beginning of period	239,602	239,746	239,746
Additions	0		0
(Deductions)	0		0
Impairment	0		0
Foreign Exchange Translation	(134)		(144)
Balance at end of period	239,468		239,602
Emerging & Other
Goodwill
Balance at beginning of period	8,449	$ 7,002	7,002
Additions	416,797		4,765
(Deductions)	0		0
Impairment			(3,318)
Balance at end of period	$ 425,246		$ 8,449

GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Goodwill [Line Items]
Goodwill impairment	$ 211,973		$ 0	$ 3,318
Goodwill	3,042,139	$ 2,854,462		2,854,462	$ 2,726,859
Carrying amount of goodwill for which excess of fair value over carrying value is less than 10%	$ 709,400
Discount Rate \| Maximum \| Trade names
Goodwill [Line Items]
Measurement input (as a percent)	0.150
Discount Rate \| Minimum \| Trade names
Goodwill [Line Items]
Measurement input (as a percent)	0.105
Royalty Rate \| Maximum \| Trade names
Goodwill [Line Items]
Measurement input (as a percent)	0.060
Royalty Rate \| Minimum \| Trade names
Goodwill [Line Items]
Measurement input (as a percent)	0.010
Match Group
Goodwill [Line Items]
Impairment of indefinite-lived intangible assets	$ 4,600
Publishing
Goodwill [Line Items]
Accumulated impairment on goodwill	399,700	399,700		399,700
Applications
Goodwill [Line Items]
Goodwill impairment	211,973			0
Goodwill	292,641	504,748		504,748	504,892
Accumulated impairment on goodwill	741,100	529,100		529,100
Emerging & Other
Goodwill [Line Items]
Goodwill impairment				3,318
Goodwill	425,246	8,449		8,449	7,002
Dotdash
Goodwill [Line Items]
Accumulated impairment on goodwill	198,300	198,300		198,300
Desktop \| Applications
Goodwill [Line Items]
Goodwill impairment	211,973			0
Impairment of indefinite-lived intangible assets	21,400
Goodwill	$ 53,173	265,146		265,146	265,146
Desktop \| Applications \| Discount Rate
Goodwill [Line Items]
Measurement input (as a percent)	0.150
Mosaic Group \| Applications
Goodwill [Line Items]
Goodwill impairment	$ 0			0
Goodwill	239,468	239,602		239,602	$ 239,746
College Humor Media \| Emerging & Other
Goodwill [Line Items]
Goodwill impairment	0	3,300
Accumulated impairment on goodwill	$ 14,900	$ 14,900		$ 14,900

- Intangible Assets with Definite Lives (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Intangible assets with definite lives
Gross Carrying Amount	$ 435,826	$ 347,177
Accumulated Amortization	(237,567)	(215,198)
Total	$ 198,259	$ 131,979
Weighted-Average Useful Life (Years)	4 years	3 years 9 months 18 days
Technology
Intangible assets with definite lives
Gross Carrying Amount	$ 203,737	$ 154,052
Accumulated Amortization	(87,442)	(79,358)
Total	$ 116,295	$ 74,694
Weighted-Average Useful Life (Years)	4 years 8 months 12 days	4 years 7 months 6 days
Service professional relationships
Intangible assets with definite lives
Gross Carrying Amount	$ 99,850	$ 99,651
Accumulated Amortization	(83,560)	(76,445)
Total	$ 16,290	$ 23,206
Weighted-Average Useful Life (Years)	3 years	2 years 10 months 24 days
Customer lists and user base
Intangible assets with definite lives
Gross Carrying Amount	$ 79,768	$ 44,548
Accumulated Amortization	(26,804)	(24,488)
Total	$ 52,964	$ 20,060
Weighted-Average Useful Life (Years)	4 years	3 years 3 months 18 days
Trade names
Intangible assets with definite lives
Gross Carrying Amount	$ 21,868	$ 19,074
Accumulated Amortization	(15,544)	(13,068)
Total	$ 6,324	$ 6,006
Weighted-Average Useful Life (Years)	2 years 8 months 12 days	3 years 2 months 12 days
Memberships
Intangible assets with definite lives
Gross Carrying Amount	$ 15,900	$ 15,900
Accumulated Amortization	(13,264)	(11,940)
Total	$ 2,636	$ 3,960
Weighted-Average Useful Life (Years)	3 years	3 years
Other
Intangible assets with definite lives
Gross Carrying Amount	$ 14,703	$ 13,952
Accumulated Amortization	(10,953)	(9,899)
Total	$ 3,750	$ 4,053
Weighted-Average Useful Life (Years)	3 years 8 months 12 days	3 years 8 months 12 days

GOODWILL AND INTANGIBLE ASSETS - Expected Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
2020	$ 60,498
2021	45,014
2022	39,859
2023	30,119
2024	15,841
Thereafter	6,928
Total	$ 198,259	$ 131,979

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Narrative (Details)	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contractual maturity of current available-for-sale securities (less than)	1 year
Available-for-sale marketable debt securities in a continuous unrealized loss position for longer than twelve months	$ 0
Assets measured at fair value on a nonrecurring basis
Equity securities without readily determinable fair values	301,600,000		$ 353,100,000
Total upward adjustments to equity securities without readily determinable fair value	19,900,000
Total downward adjustments to equity securities without readily determinable fair value	58,100,000
Contingent Consideration Arrangements
Total maximum contingent payment	30,000,000.0
Gross fair value, before unamortized discount	1,300,000
Non-current portion of contingent consideration	600,000		$ 6,900,000
Impairment of equity securities without readily determinable fair value	51,500,000
Contingent Consideration Arrangements
Contingent Consideration Arrangements
Assumption of contingent consideration arrangement liability	1,000,000	$ 0
Settlements of contingent consideration arrangements	$ 1,000,000	$ 1,988,000
Discount Rate \| Contingent Consideration Arrangements
Contingent Consideration Arrangements
Discount rate on contingent consideration (as a percent)	0.25		0.25

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Fair Value of Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Available-for-sale marketable debt securities	$ 49,912	$ 19,993
Total marketable securities	$ 49,912	$ 19,993

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Current Available-for-Sale Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Available-for-sale Marketable Securities
Amortized Cost	$ 49,924	$ 19,993
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(12)	0
Fair Value	49,912	19,993
Treasury discount notes
Schedule of Available-for-sale Marketable Securities
Amortized Cost	49,924
Gross Unrealized Gains	0
Gross Unrealized Losses	(12)
Fair Value	$ 49,912
Commercial paper
Schedule of Available-for-sale Marketable Securities
Amortized Cost		19,993
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		$ 19,993

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Realized and Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Adjustments to Carrying Value of Non-Marketable Equity Securities
Upward adjustments (gross unrealized gains)	$ 0	$ 0
Downward adjustments including impairment (gross unrealized losses)	(51,484)	(150)
Total	(51,484)	(150)
Adjustments to Carrying Value of Non-Marketable Equity Securities
Realized gains, net, for equity securities sold	12	78
Unrealized losses, net, on equity securities held	(51,484)	(122)
Total losses, net recognized in other (expense) income, net	$ (51,472)	$ (44)

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets:
Marketable securities	$ 49,912	$ 19,993
Other non-current assets	318,832	301,441
Total assets	2,256,611	2,550,995
Liabilities:
Contingent consideration arrangement	(636)	(6,918)
Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Total assets	2,007,519	2,164,576
Liabilities:
Contingent consideration arrangement	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Total assets	242,603	377,924
Liabilities:
Contingent consideration arrangement	0	0
Significant Unobservable Inputs (Level 3)
Assets:
Total assets	6,489	8,495
Liabilities:
Contingent consideration arrangement	(636)	(6,918)
Money market funds
Assets:
Cash equivalents	2,007,519	2,164,576
Money market funds \| Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash equivalents	2,007,519	2,164,576
Money market funds \| Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents	0	0
Money market funds \| Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	0	0
Treasury discount notes
Assets:
Cash equivalents	99,882	199,896
Marketable securities	49,912
Treasury discount notes \| Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash equivalents	0	0
Marketable securities	0
Treasury discount notes \| Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents	99,882	199,896
Marketable securities	49,912
Treasury discount notes \| Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	0	0
Marketable securities	0
Time deposits
Assets:
Cash equivalents	72,809	128,075
Time deposits \| Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash equivalents	0	0
Time deposits \| Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents	72,809	128,075
Time deposits \| Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	0	0
Short-term investments
Assets:
Short-term investments	20,000
Short-term investments \| Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Short-term investments	0
Short-term investments \| Significant Other Observable Inputs (Level 2)
Assets:
Short-term investments	20,000
Short-term investments \| Significant Unobservable Inputs (Level 3)
Assets:
Short-term investments	0
Commercial paper
Assets:
Cash equivalents		29,960
Marketable securities		19,993
Commercial paper \| Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash equivalents		0
Marketable securities		0
Commercial paper \| Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents		29,960
Marketable securities		19,993
Commercial paper \| Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents		0
Marketable securities		0
Warrant
Assets:
Other non-current assets	6,489	8,495
Warrant \| Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Other non-current assets	0	0
Warrant \| Significant Other Observable Inputs (Level 2)
Assets:
Other non-current assets	0	0
Warrant \| Significant Unobservable Inputs (Level 3)
Assets:
Other non-current assets	$ 6,489	$ 8,495

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Contingent Consideration Arrangements
Contingent Consideration Arrangements
Balance at beginning of period	$ 6,918	$ (28,631)
Fair value adjustments	6,282	(1,529)
Included in other comprehensive loss	0	(14)
Fair value at date of acquisition	(1,000)	0
Settlements	1,000	1,988
Balance at end of period	636	$ (28,186)
Warrant
Warrant
Balance at beginning of period	8,495
Fair value adjustments	(2,006)
Included in other comprehensive loss	0
Fair value at date of acquisition	0
Settlements	0
Balance at end of period	$ 6,489

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Carrying Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Balance Sheet Grouping, Financial Statement Captions [Line Items]
Current portion of long-term debt	$ (13,750)	$ (13,750)
Long-term debt, net	(3,625,008)	(3,121,572)
Unamortized original issue discount and debt issuance costs	397,800	404,700
Carrying Value
Balance Sheet Grouping, Financial Statement Captions [Line Items]
Current portion of long-term debt	(13,750)	(13,750)
Long-term debt, net	(3,625,008)	(3,121,572)
Fair Value
Balance Sheet Grouping, Financial Statement Captions [Line Items]
Current portion of long-term debt	(13,750)	(13,681)
Long-term debt, net	$ (4,017,844)	$ (4,136,988)

LONG-TERM DEBT - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Feb. 11, 2020	Dec. 31, 2019	Feb. 15, 2019	Dec. 04, 2017	Jun. 01, 2016
Debt Instrument [Line Items]
Less: unamortized original issue discount	$ 347,306
Less: current portion of ANGI Term Loan	13,750		$ 13,750
Less: unamortized debt issuance costs	50,499
Long-term debt, net	3,625,008		3,121,572
Match Group
Debt Instrument [Line Items]
Aggregate principal amount	2,125,000		1,625,000
Less: unamortized original issue discount	6,618		6,282
Less: unamortized debt issuance costs	20,428		15,235
Long-term debt, net	2,097,954		1,603,483
Match Group \| Term Loan \| MTCH Term Loan due February 13, 2027
Debt Instrument [Line Items]
Aggregate principal amount	425,000		425,000
Match Group \| Senior Notes \| 6.375% MTCH Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 400,000		400,000
Stated interest rate (as a percent)	6.375%					6.375%
Match Group \| Senior Notes \| 5.00% MTCH Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 450,000		450,000
Stated interest rate (as a percent)	5.00%				5.00%
Match Group \| Senior Notes \| 5.625% MTCH Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 350,000		350,000
Stated interest rate (as a percent)	5.625%			5.625%
Match Group \| Senior Notes \| 4.125% MTCH Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 500,000		0
Stated interest rate (as a percent)	4.125%	4.125%
ANGI Homeservices
Debt Instrument [Line Items]
Less: current portion of ANGI Term Loan	$ 13,750		13,750
Less: unamortized debt issuance costs	1,670		1,804
Long-term debt, net	228,643		231,946
ANGI Homeservices \| Term Loan \| ANGI Term Loan due November 5, 2023
Debt Instrument [Line Items]
Aggregate principal amount	244,063		247,500
IAC
Debt Instrument [Line Items]
Aggregate principal amount	1,667,500		1,667,500
Less: unamortized original issue discount	340,688		351,605
Less: unamortized debt issuance costs	28,401		29,752
Long-term debt, net	1,298,411		1,286,143
IAC \| Senior Notes \| 2022 Exchangeable Notes
Debt Instrument [Line Items]
Aggregate principal amount	517,500		517,500
Less: unamortized original issue discount	$ 37,314		40,768
Stated interest rate (as a percent)	0.875%
IAC \| Senior Notes \| 2026 Exchangeable Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 575,000		575,000
Less: unamortized original issue discount	$ 124,820		129,037
Stated interest rate (as a percent)	0.875%
IAC \| Senior Notes \| 2030 Exchangeable Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 575,000		575,000
Less: unamortized original issue discount	$ 178,554		$ 181,800
Stated interest rate (as a percent)	2.00%

LONG-TERM DEBT - Narrative (Details)							3 Months Ended	12 Months Ended			31 Months Ended
LONG-TERM DEBT - Narrative (Details)	Feb. 13, 2020 USD ($)	Feb. 11, 2020 $ / shares	May 21, 2019	Dec. 31, 2018	Nov. 05, 2018 USD ($)	Oct. 02, 2017 USD ($)	Mar. 31, 2020 USD ($)	Nov. 05, 2023 USD ($)	Nov. 05, 2022 USD ($)	Dec. 31, 2019 USD ($)	Nov. 05, 2021 USD ($)	Feb. 15, 2019	Dec. 07, 2018 USD ($)	Dec. 04, 2017	Jun. 01, 2016
Debt Instrument [Line Items]
Net unamortized discount (premium)							$ 347,306,000
Outstanding balance of debt instrument							4,036,563,000
IAC
Debt Instrument [Line Items]
Principal							1,667,500,000			$ 1,667,500,000
Net unamortized discount (premium)							$ 340,688,000			351,605,000
IAC Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum leverage ratio				2.75			3.25
Maximum borrowing capacity							$ 250,000,000
Borrowings outstanding of credit facility							$ 0			$ 0
Annual commitment fee on undrawn funds, basis points (as a percent)							0.20%			0.20%
Match Group
Debt Instrument [Line Items]
Cash paid to holders of related party common stock per share (USD per share) \| $ / shares		$ 3.00
Match Group
Debt Instrument [Line Items]
Principal							$ 2,125,000,000			$ 1,625,000,000
Net unamortized discount (premium)							$ 6,618,000			$ 6,282,000
Match Group \| MTCH Term Loan due February 13, 2027 \| Revolving Credit Facility
Debt Instrument [Line Items]
Leverage ratio limiting ability to pay dividends, make distributions, or repurchase stock							4.0
Match Group \| Match Group Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum leverage ratio							5.0
Maximum borrowing capacity	$ 750,000,000						$ 750,000,000						$ 500,000,000
Increase (decrease) in interest rate (as a percent)	(0.125%)
Leverage ratio limiting ability to pay dividends, make distributions, or repurchase stock							2.0
Match Group \| MTCH Credit Facility due December 7, 2023 \| Revolving Credit Facility
Debt Instrument [Line Items]
Annual commitment fee on undrawn funds, basis points (as a percent)							0.30%			0.25%
ANGI Homeservices \| ANGI Homeservices Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 250,000,000
Borrowings outstanding of credit facility							$ 0			$ 0
Annual commitment fee on undrawn funds, basis points (as a percent)							0.25%			0.25%
Debt instrument term					5 years
Senior Notes \| 0.875% Exchangeable Notes due 2026 & 2.00% Exchangeable Notes due 2030 \| IAC
Debt Instrument [Line Items]
Period of reported sale price of common stock (trading days)							5 days
Period of consecutive reported sale price of common stock (trading days)							5 days
Senior Notes \| 2026 Exchangeable Notes \| IAC
Debt Instrument [Line Items]
Stated interest rate (as a percent)							0.875%
Face amount of debt instrument						$ 575,000,000.0
Effective interest rate (as a percent)							5.35%
Principal							$ 575,000,000			$ 575,000,000
Net unamortized discount (premium)							124,820,000			129,037,000
Outstanding balance of debt instrument							$ 450,180,000			445,963,000
Senior Notes \| 2030 Exchangeable Notes \| IAC
Debt Instrument [Line Items]
Stated interest rate (as a percent)							2.00%
Face amount of debt instrument						575,000,000.0
Effective interest rate (as a percent)							6.59%
Principal							$ 575,000,000			575,000,000
Net unamortized discount (premium)							178,554,000			181,800,000
Outstanding balance of debt instrument							$ 396,446,000			393,200,000
Senior Notes \| 2022 Exchangeable Notes
Debt Instrument [Line Items]
Face amount of debt instrument						$ 517,500,000
Senior Notes \| 2022 Exchangeable Notes \| IAC
Debt Instrument [Line Items]
Stated interest rate (as a percent)							0.875%
Effective interest rate (as a percent)							4.73%
Principal							$ 517,500,000			517,500,000
Net unamortized discount (premium)							37,314,000			40,768,000
Outstanding balance of debt instrument							$ 480,186,000			476,732,000
Period of reported sale price of common stock (trading days)						20 days	5 days
Period of consecutive reported sale price of common stock (trading days)						30 days	5 days
Exchange price on applicable trading day (as a percent)						130.00%
Amount of product relative to last reported price (as a percent)						98.00%
If-converted value in excess of principal							$ 92,000,000.0			329,600,000
Senior Notes \| Match Group \| 6.375% MTCH Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)							6.375%								6.375%
Maximum leverage ratio							5.0
Principal							$ 400,000,000			400,000,000
Senior Notes \| Match Group \| 5.00% MTCH Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)							5.00%							5.00%
Principal							$ 450,000,000			450,000,000
Senior Notes \| Match Group \| 5.625% MTCH Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)							5.625%					5.625%
Principal							$ 350,000,000			350,000,000
Senior Notes \| Match Group \| 4.125% MTCH Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)		4.125%					4.125%
Principal							$ 500,000,000			$ 0
Senior Notes \| IAC FinanceCo 2, Inc.& IAC FinanceCo 3, Inc. \| 0.875% Exchangeable Notes due 2026 & 2.00% Exchangeable Notes due 2030 \| IAC
Debt Instrument [Line Items]
Period of reported sale price of common stock (trading days)			20 days
Period of consecutive reported sale price of common stock (trading days)			30 days
Exchange price on applicable trading day (as a percent)			130.00%
Redemption price (as a percent)			100.00%
Term Loan \| Match Group \| MTCH Term Loan due February 13, 2027
Debt Instrument [Line Items]
Face amount of debt instrument							$ 425,000,000
Basis spread on variable rate (as a percent)							3.46%			4.44%
Principal							$ 425,000,000			$ 425,000,000
Outstanding balance of debt instrument										$ 425,000,000
Term Loan \| Match Group \| MTCH Term Loan due February 13, 2027 \| LIBOR
Debt Instrument [Line Items]
Effective interest rate (as a percent)							1.75%			2.50%
Term Loan \| ANGI Homeservices \| ANGI Term Loan due November 5, 2023
Debt Instrument [Line Items]
Maximum leverage ratio							4.5
Basis spread on variable rate (as a percent)							2.28%			3.25%
Minimum interest coverage ratio							2.0
Leverage ratio limiting ability to pay dividends, make distributions, or repurchase stock							4.25
Principal							$ 244,063,000			$ 247,500,000
Term Loan \| ANGI Homeservices \| ANGI Term Loan due November 5, 2023 \| Forecast
Debt Instrument [Line Items]
Quarterly repayments of principal								$ 10,300,000	$ 6,900,000		$ 3,400,000
Final principal payment								$ 161,600,000
Term Loan \| ANGI Homeservices \| ANGI Term Loan due November 5, 2023 \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)							1.50%			1.50%
Credit Facility \| Match Group \| MTCH Credit Facility due December 7, 2023
Debt Instrument [Line Items]
Borrowings outstanding of credit facility							$ 0
Outstanding balance of debt instrument										$ 0

LONG-TERM DEBT - Exchangeable Notes (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Liability component:
Less: unamortized original issue discount	$ 347,306
Total	$ 4,036,563
Senior Notes \| 2022 Exchangeable Notes
Debt Instrument [Line Items]
Approximate Equivalent Exchange Price per Share (USD per share)	$ 152.18
Senior Notes \| 2026 Exchangeable Notes
Debt Instrument [Line Items]
Approximate Equivalent Exchange Price per Share (USD per share)	302.77
Senior Notes \| 2030 Exchangeable Notes
Debt Instrument [Line Items]
Approximate Equivalent Exchange Price per Share (USD per share)	$ 291.35
IAC
Liability component:
Principal	$ 1,667,500		$ 1,667,500
Less: unamortized original issue discount	$ 340,688		351,605
IAC \| Senior Notes \| 2022 Exchangeable Notes
Debt Instrument [Line Items]
Number of shares of the Company's Common Stock into which each $1,000 of Principal of the Exchangeable Notes is Exchangeable (shares)	6.5713
Approximate Equivalent Exchange Price per Share (USD per share)	$ 152.18
Liability component:
Principal	$ 517,500		517,500
Less: unamortized original issue discount	37,314		40,768
Total	480,186		476,732
Equity component	70,363		70,363
Interest expense recognized related to the Exchangeable Notes
Contractual interest expense	1,132	$ 1,132
Amortization of original issue discount	3,454	3,363
Amortization of debt issuance costs	855	871
Total interest expense recognized	$ 5,441	$ 5,366
IAC \| Senior Notes \| 2022 Exchangeable Notes \| Exchangeable Notes Hedge
Exchangeable Notes Hedges and Warrants
Number of Shares	3,400,000
Approximate Equivalent Exchange Price/Strike Price per Share (USD per share)	$ 152.18
IAC \| Senior Notes \| 2022 Exchangeable Notes \| Exchangeable Notes Warrants
Exchangeable Notes Hedges and Warrants
Number of Shares	3,400,000
Approximate Equivalent Exchange Price/Strike Price per Share (USD per share)	$ 229.70
IAC \| Senior Notes \| 2026 Exchangeable Notes
Debt Instrument [Line Items]
Number of shares of the Company's Common Stock into which each $1,000 of Principal of the Exchangeable Notes is Exchangeable (shares)	3.3028
Approximate Equivalent Exchange Price per Share (USD per share)	$ 302.77
Liability component:
Principal	$ 575,000		575,000
Less: unamortized original issue discount	124,820		129,037
Total	450,180		445,963
Equity component	138,796		138,796
Interest expense recognized related to the Exchangeable Notes
Contractual interest expense	1,258
Amortization of original issue discount	4,217
Amortization of debt issuance costs	319
Total interest expense recognized	$ 5,794
IAC \| Senior Notes \| 2026 Exchangeable Notes \| Exchangeable Notes Hedge
Exchangeable Notes Hedges and Warrants
Number of Shares	1,900,000
Approximate Equivalent Exchange Price/Strike Price per Share (USD per share)	$ 302.77
IAC \| Senior Notes \| 2026 Exchangeable Notes \| Exchangeable Notes Warrants
Exchangeable Notes Hedges and Warrants
Number of Shares	1,900,000
Approximate Equivalent Exchange Price/Strike Price per Share (USD per share)	$ 457.02
IAC \| Senior Notes \| 2030 Exchangeable Notes
Debt Instrument [Line Items]
Number of shares of the Company's Common Stock into which each $1,000 of Principal of the Exchangeable Notes is Exchangeable (shares)	3.4323
Approximate Equivalent Exchange Price per Share (USD per share)	$ 291.35
Liability component:
Principal	$ 575,000		575,000
Less: unamortized original issue discount	178,554		181,800
Total	396,446		393,200
Equity component	189,213		$ 189,213
Interest expense recognized related to the Exchangeable Notes
Contractual interest expense	2,875
Amortization of original issue discount	3,246
Amortization of debt issuance costs	176
Total interest expense recognized	$ 6,297
IAC \| Senior Notes \| 2030 Exchangeable Notes \| Exchangeable Notes Hedge
Exchangeable Notes Hedges and Warrants
Number of Shares	2,000,000.0
Approximate Equivalent Exchange Price/Strike Price per Share (USD per share)	$ 291.35
IAC \| Senior Notes \| 2030 Exchangeable Notes \| Exchangeable Notes Warrants
Exchangeable Notes Hedges and Warrants
Number of Shares	2,000,000.0
Approximate Equivalent Exchange Price/Strike Price per Share (USD per share)	$ 457.02

LONG-TERM DEBT - Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Remainder of 2020	$ 10,313
2021	13,750
2022	545,000
2023	192,500
2024	400,000
Thereafter	2,875,000
Total	4,036,563
Less: current portion of long-term debt	13,750	$ 13,750
Less: unamortized original issue discount	347,306
Less: unamortized debt issuance costs	50,499
Total long-term debt, net	$ 3,625,008	$ 3,121,572

ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	$ 3,898,318,000	$ 3,551,801,000
Total other comprehensive (loss) income, net of income taxes	(26,105,000)	1,310,000
Balance at end of period	3,454,824,000	3,571,336,000
Tax provision (benefit) on accumulated other comprehensive loss	0
Foreign Currency Translation Adjustment attributable to Parent
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	(136,349,000)	(128,726,000)
Balance at end of period	(157,273,000)	(126,725,000)
Foreign Currency Translation Adjustment including portion attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income (loss) before reclassifications	(21,307,000)	993,000
Amounts reclassified to earnings	(20,000)
Total other comprehensive (loss) income, net of income taxes	(21,327,000)	993,000
Foreign Currency Translation Adjustment attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss)
Total other comprehensive (loss) income, net of income taxes	403,000	1,008,000
Unrealized Gains (Losses) on Available-for-Sale Debt Securities attributable to Parent
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	0	4,000
Balance at end of period	(12,000)	6,000
Unrealized Gains (Losses) on Available-for-Sale Debt Securities including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income (loss) before reclassifications	(12,000)	2,000
Amounts reclassified to earnings	0
Total other comprehensive (loss) income, net of income taxes	(12,000)	2,000
Unrealized Gains (Losses) on Available-for-Sale Debt Securities attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss)
Total other comprehensive (loss) income, net of income taxes	0	0
Accumulated Other Comprehensive (Loss) Income attributable to Parent
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	(136,349,000)	(128,722,000)
Balance at end of period	(157,285,000)	(126,719,000)
Accumulated Other Comprehensive (Loss) Income including portion attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income (loss) before reclassifications	(21,319,000)	995,000
Amounts reclassified to earnings	(20,000)
Total other comprehensive (loss) income, net of income taxes	(21,339,000)	995,000
Accumulated Other Comprehensive (Loss) Income attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss)
Total other comprehensive (loss) income, net of income taxes	$ 403,000	$ 1,008,000

(LOSS) EARNINGS PER SHARE - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator: Basic
Net (loss) earnings	$ (182,643)	$ 112,985
Net earnings attributable to noncontrolling interests	(28,397)	(24,290)
Net (loss) earnings attributable to IAC shareholders	(211,040)	88,695
Numerator: Diluted
Net (loss) earnings	(182,643)	112,985
Net earnings attributable to noncontrolling interests	(28,397)	(24,290)
Impact from publicly-traded subsidiaries' dilutive securities	0	(6,696)
Net (loss) earnings attributable to IAC shareholders	$ (211,040)	$ 81,999
Denominator: Basic
Weighted average basic shares outstanding (shares)	84,839	83,905
Denominator: Diluted
Weighted average basic shares outstanding (shares)	84,839	83,905
Dilutive securities (shares)	0	6,435
Denominator for earnings per share - weighted average shares (shares)	84,839	90,340
Earnings per share attributable to IAC shareholders: Basic
Earnings per share (USD per share)	$ (2.49)	$ 1.06
Earnings per share attributable to IAC shareholders: Diluted
Earnings per share (USD per share)	$ (2.49)	0.91
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average share price (USD per share)		$ 207.01
Stock options, warrants, and subsidiary denominated equity exchange of Exchangeable Notes and vesting of RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (less than or equal to) (shares)	19,700
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (less than or equal to) (shares)		3,400
Market-based awards and PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (less than or equal to) (shares)		300
Senior Notes \| 2022 Exchangeable Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (less than or equal to) (shares)		900
Exchange price per share (USD per share)	$ 152.18
Senior Notes \| 2026 Exchangeable Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exchange price per share (USD per share)	302.77
Senior Notes \| 2030 Exchangeable Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exchange price per share (USD per share)	$ 291.35

SEGMENT INFORMATION - Financial Data by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 1,228,765	$ 1,105,843
Operating income (loss)	(177,780)	79,873
Operating segments \| Match Group
Segment Reporting Information [Line Items]
Revenue	544,642	464,625
Operating income (loss)	134,681	118,828
Adjusted EBITDA	171,502	155,067
Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	343,650	303,443
Operating income (loss)	(16,296)	(3,641)
Adjusted EBITDA	34,397	37,179
Operating segments \| Vimeo
Segment Reporting Information [Line Items]
Revenue	56,968	43,581
Operating income (loss)	(14,589)	(17,784)
Adjusted EBITDA	(11,408)	(16,200)
Operating segments \| Dotdash
Segment Reporting Information [Line Items]
Revenue	44,120	33,961
Operating income (loss)	2,411	3,047
Adjusted EBITDA	7,011	7,150
Operating segments \| Applications
Segment Reporting Information [Line Items]
Revenue	104,148	143,549
Operating income (loss)	(218,588)	25,356
Adjusted EBITDA	10,151	29,688
Operating segments \| Emerging & Other
Segment Reporting Information [Line Items]
Revenue	135,305	116,748
Operating income (loss)	(19,845)	(2,520)
Adjusted EBITDA	(16,980)	(2,095)
Inter-segment eliminations
Segment Reporting Information [Line Items]
Revenue	(68)	(64)
Corporate
Segment Reporting Information [Line Items]
Operating income (loss)	(45,554)	(43,413)
Adjusted EBITDA	$ (31,398)	$ (20,220)

SEGMENT INFORMATION - Revenue Disaggregated by Service (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 1,228,765	$ 1,105,843
Operating segments \| Match Group
Segment Reporting Information [Line Items]
Revenue	544,642	464,625
Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	343,650	303,443
Operating segments \| Vimeo
Segment Reporting Information [Line Items]
Revenue	56,968	43,581
Operating segments \| Dotdash
Segment Reporting Information [Line Items]
Revenue	44,120	33,961
Operating segments \| Applications
Segment Reporting Information [Line Items]
Revenue	104,148	143,549
Operating segments \| Applications \| Mosaic Group
Segment Reporting Information [Line Items]
Revenue	50,677	47,563
Operating segments \| Emerging & Other
Segment Reporting Information [Line Items]
Revenue	135,305	116,748
North America \| Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	324,132	281,994
International
Segment Reporting Information [Line Items]
Revenue	441,425	393,462
Europe \| Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	19,518	21,449
Direct revenue \| Operating segments \| Match Group
Segment Reporting Information [Line Items]
Revenue	534,824	453,962
Direct revenue \| North America \| Operating segments \| Match Group
Segment Reporting Information [Line Items]
Revenue	263,347	237,773
Direct revenue \| International \| Operating segments \| Match Group
Segment Reporting Information [Line Items]
Revenue	271,477	216,189
Indirect revenue (principally advertising revenue) \| Operating segments \| Match Group
Segment Reporting Information [Line Items]
Revenue	9,818	10,663
Total Marketplace revenue \| North America \| Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	258,776	220,500
Consumer connection revenue \| North America \| Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	239,830	201,582
Service professional membership subscription revenue \| North America \| Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	14,115	16,517
Other revenue \| North America \| Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	4,831	2,401
Advertising and other revenue \| North America \| Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	65,356	61,494
Advertising and other revenue \| Europe \| Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	530	584
Consumer connection revenue \| Europe \| Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	15,689	17,123
Service professional membership subscription revenue \| Europe \| Operating segments \| ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	3,299	3,742
Platform revenue \| Operating segments \| Vimeo
Segment Reporting Information [Line Items]
Revenue	56,968	41,302
Hardware revenue \| Operating segments \| Vimeo
Segment Reporting Information [Line Items]
Revenue	0	2,279
Display advertising revenue \| Operating segments \| Dotdash
Segment Reporting Information [Line Items]
Revenue	29,889	26,008
Display advertising revenue \| Operating segments \| Applications \| Mosaic Group
Segment Reporting Information [Line Items]
Revenue	1,606	2,415
Display advertising revenue \| Operating segments \| Emerging & Other
Segment Reporting Information [Line Items]
Revenue	104,229	103,449
Google advertising revenue \| Operating segments \| Emerging & Other
Segment Reporting Information [Line Items]
Revenue	81,968	96,273
Non-Google advertising revenue \| Operating segments \| Emerging & Other
Segment Reporting Information [Line Items]
Revenue	22,261	7,176
Performance marketing revenue \| Operating segments \| Dotdash
Segment Reporting Information [Line Items]
Revenue	14,231	7,953
Total Desktop revenue \| Operating segments \| Applications
Segment Reporting Information [Line Items]
Revenue	53,471	95,986
Total advertising revenue \| Operating segments \| Applications
Segment Reporting Information [Line Items]
Revenue	49,314	91,398
Google advertising revenue \| Operating segments \| Applications
Segment Reporting Information [Line Items]
Revenue	46,091	88,050
Non-Google advertising revenue \| Operating segments \| Applications
Segment Reporting Information [Line Items]
Revenue	3,223	3,348
Subscription and other revenue \| Operating segments \| Applications
Segment Reporting Information [Line Items]
Revenue	4,157	4,588
Subscription and other revenue \| Operating segments \| Applications \| Mosaic Group
Segment Reporting Information [Line Items]
Revenue	49,071	45,148
Other revenue \| Operating segments \| Emerging & Other
Segment Reporting Information [Line Items]
Revenue	$ 31,076	$ 13,299

SEGMENT INFORMATION - Geographic Information about Revenue and Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenue and long-lived assets by geography
Revenue	$ 1,228,765	$ 1,105,843
Long-lived assets (excluding goodwill and intangible assets)	373,561		$ 371,353
United States
Revenue and long-lived assets by geography
Revenue	787,340	712,381
Long-lived assets (excluding goodwill and intangible assets)	348,146		345,937
All other countries
Revenue and long-lived assets by geography
Revenue	441,425	$ 393,462
Long-lived assets (excluding goodwill and intangible assets)	$ 25,415		$ 25,416

SEGMENT INFORMATION - Reconciliation of Operating Income (Loss) to Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating (loss) income	$ (177,780)	$ 79,873
Stock-Based Compensation Expense	58,464	67,444
Depreciation	24,738	18,971
Amortization of Intangibles	52,162	22,752
Goodwill Impairment	211,973	0	$ 3,318
Interest expense	(44,866)	(31,143)
Other income (expense), net	(49,893)	651
(Loss) earnings before income taxes	(272,539)	49,381
Income tax benefit	89,896	63,604
Net (loss) earnings	(182,643)	112,985
Net earnings attributable to noncontrolling interests	(28,397)	(24,290)
Net (loss) earnings attributable to IAC shareholders	(211,040)	88,695
ANGI Homeservices
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill Impairment	0		0
Applications
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill Impairment	211,973		0
Emerging & Other
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill Impairment			$ 3,318
Operating segments \| Match Group
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating (loss) income	134,681	118,828
Stock-Based Compensation Expense	21,172	27,997
Depreciation	9,246	7,831
Amortization of Intangibles	6,403	411
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0
Goodwill Impairment	0
Adjusted EBITDA	171,502	155,067
Operating segments \| ANGI Homeservices
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating (loss) income	(16,296)	(3,641)
Stock-Based Compensation Expense	25,575	19,282
Depreciation	12,138	6,999
Amortization of Intangibles	12,980	14,539
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0
Goodwill Impairment	0
Adjusted EBITDA	34,397	37,179
Operating segments \| Vimeo
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating (loss) income	(14,589)	(17,784)
Stock-Based Compensation Expense	0	0
Depreciation	58	193
Amortization of Intangibles	3,123	1,391
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0
Goodwill Impairment	0
Adjusted EBITDA	(11,408)	(16,200)
Operating segments \| Dotdash
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating (loss) income	2,411	3,047
Stock-Based Compensation Expense	0	0
Depreciation	210	226
Amortization of Intangibles	4,390	3,877
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0
Goodwill Impairment	0
Adjusted EBITDA	7,011	7,150
Operating segments \| Applications
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating (loss) income	(218,588)	25,356
Stock-Based Compensation Expense	0	0
Depreciation	237	419
Amortization of Intangibles	22,811	2,384
Acquisition-related Contingent Consideration Fair Value Adjustments	(6,282)	1,529
Goodwill Impairment	211,973
Adjusted EBITDA	10,151	29,688
Operating segments \| Emerging & Other
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating (loss) income	(19,845)	(2,520)
Stock-Based Compensation Expense	25	0
Depreciation	385	275
Amortization of Intangibles	2,455	150
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0
Goodwill Impairment	0
Adjusted EBITDA	(16,980)	(2,095)
Corporate
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating (loss) income	(45,554)	(43,413)
Stock-Based Compensation Expense	11,692	20,165
Depreciation	2,464	3,028
Amortization of Intangibles	0	0
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0
Goodwill Impairment	0
Adjusted EBITDA	$ (31,398)	$ (20,220)

CONSOLIDATED FINANCIAL STATEMENT DETAILS - Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 2,822,729	$ 3,139,295	$ 2,217,337	$ 2,131,632
Restricted cash included in other current assets	867	654	1,635	1,633
Restricted cash included in other assets	398	409	416	420
Total cash and cash equivalents and restricted cash as shown on the consolidated statement of cash flows	$ 2,823,994	$ 3,140,358	$ 2,219,388	$ 2,133,685

CONSOLIDATED FINANCIAL STATEMENT DETAILS - Accumulated Amortization and Depreciation (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Depreciation, Depletion and Amortization [Abstract]
Right-of-use assets (included in other non-current assets)	$ 59,237	$ 47,815
Property, capitalized software and equipment	335,766	324,359
Intangible assets	$ 237,567	$ 215,198

CONSOLIDATED FINANCIAL STATEMENT DETAILS - Other (Expense) Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other (expense) income, net	$ (49,893)	$ 651

CONSOLIDATED FINANCIAL STATEMENT DETAILS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Impairment of equity securities without readily determinable fair value	$ (51.5)
Write-off of notes receivable	(7.5)
Interest income	$ 10.1	$ 12.4
Gain (loss) on sale of business		(8.1)
Net foreign currency exchange gain (loss)		$ (1.9)

CONTINGENCIES - Narrative (Details)	Jun. 13, 2019 plaintiff	Aug. 31, 2018 plaintiff	Aug. 14, 2018 USD ($) plaintiff	Mar. 31, 2020 USD ($) lawsuit
Loss Contingencies [Line Items]
Loss contingency reserve \| $				$ 0
Number of lawsuits with possible material impact (one or more) \| lawsuit				1
Tinder Optionholder Litigation
Loss Contingencies [Line Items]
Number of plaintiffs	6	6	10
Number of plaintiffs who filed a notice of discontinuance of their claims without prejudice		4
Number of plaintiffs that were granted motion to dismiss merger-related claim for breach of contract	2
Tinder Optionholder Litigation \| Pending Litigation
Loss Contingencies [Line Items]
Damages sought \| $			$ 2,000,000,000

SUBSEQUENT EVENT - Narrative (Details) $ in Billions	May 06, 2020 USD ($)
Class M Common Stock \| Subsequent Event
Subsequent Event [Line Items]
Authorized amount of sale of stock	$ 1.5