SEGMENT INFORMATION - Reconciliation of Adjusted EBITDA to Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	$ (55,473)	$ (166,140)	$ (191,069)	$ (274,954)
Stock-based compensation expense	30,193	31,656	59,134	61,343
Depreciation			102,455	59,288
Amortization of intangibles	54,183	56,081	108,789	113,271
Goodwill impairment	0	86,748	0	86,748
Interest expense	(39,077)	(23,517)	(77,249)	(45,429)
Unrealized (loss) gain on investment in MGM Resorts International	(32,362)	(825,305)	672,478	(1,012,635)
Other income (expense), net	10,985	(89,425)	34,734	(82,726)
(Loss) earnings before income taxes	(115,927)	(1,104,387)	438,894	(1,415,744)
Income tax benefit (provision)	24,297	228,988	(115,205)	299,452
Net (loss) earnings	(91,630)	(875,399)	323,689	(1,116,292)
Net loss attributable to noncontrolling interests	2,585	6,269	5,041	11,364
Net (loss) earnings attributable to IAC shareholders	(89,045)	(869,130)	328,730	(1,104,928)
Operating Segments \| Dotdash Meredith
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	(17,820)	(27,507)	(129,054)	(83,752)
Operating Segments \| Dotdash Meredith \| Digital
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	6,059	11,096	(11,828)	9,228
Stock-based compensation expense	2,092	4,879	3,787	9,075
Depreciation	7,332	8,203	12,576	15,692
Amortization of intangibles	35,351	27,138	70,702	52,733
Acquisition-related Contingent Consideration Fair Value Adjustments				(612)
Adjusted EBITDA	50,834	51,316	75,237	86,116
Operating Segments \| Dotdash Meredith \| Print
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	(944)	(20,099)	(6,700)	(58,434)
Stock-based compensation expense	376	204	522	268
Depreciation	3,855	4,632	6,490	10,164
Amortization of intangibles	14,123	21,528	28,432	43,787
Acquisition-related Contingent Consideration Fair Value Adjustments				0
Adjusted EBITDA	17,410	6,265	28,744	(4,215)
Operating Segments \| Dotdash Meredith \| Other
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	(22,935)	(18,504)	(110,526)	(34,546)
Stock-based compensation expense	3,102	27	6,352	39
Depreciation	5,681	63	31,168	307
Amortization of intangibles	0	0	0	0
Acquisition-related Contingent Consideration Fair Value Adjustments				0
Adjusted EBITDA	(14,152)	(18,414)	(73,006)	(34,200)
Operating Segments \| Angi Inc.
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	(16,683)	(20,886)	(27,153)	(54,843)
Operating Segments \| Angi Inc. \| Other
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	(16,568)	(18,091)	(31,507)	(31,113)
Stock-based compensation expense	3,459	2,989	6,044	5,561
Depreciation	0	0	0	0
Amortization of intangibles	0	0	0	0
Acquisition-related Contingent Consideration Fair Value Adjustments				0
Goodwill impairment		0		0
Adjusted EBITDA	(13,109)	(15,102)	(25,463)	(25,552)
Operating Segments \| Angi Inc. \| Ads and Leads
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	4,791	23,292	18,271	38,778
Stock-based compensation expense	5,307	5,404	10,798	10,324
Depreciation	15,394	10,805	33,612	22,062
Amortization of intangibles	2,663	2,663	5,325	5,325
Acquisition-related Contingent Consideration Fair Value Adjustments				0
Goodwill impairment		0		0
Adjusted EBITDA	28,155	42,164	68,006	76,489
Operating Segments \| Angi Inc. \| Services
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	(5,175)	(21,051)	(17,627)	(46,801)
Stock-based compensation expense	1,192	4,513	5,401	9,053
Depreciation	5,683	1,650	11,758	3,318
Amortization of intangibles	0	975	0	1,950
Acquisition-related Contingent Consideration Fair Value Adjustments				0
Goodwill impairment		0		0
Adjusted EBITDA	1,700	(13,913)	(468)	(32,480)
Operating Segments \| Angi Inc. \| Roofing
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	(1,302)	(3,789)	(891)	(9,939)
Stock-based compensation expense	(167)	385	(2)	1,215
Depreciation	175	148	420	275
Amortization of intangibles	0	166	0	333
Acquisition-related Contingent Consideration Fair Value Adjustments				0
Goodwill impairment		0		0
Adjusted EBITDA	(1,294)	(3,090)	(473)	(8,116)
Operating Segments \| Angi Inc. \| International
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	1,571	(1,247)	4,601	(5,768)
Stock-based compensation expense	339	126	766	249
Depreciation	927	751	1,824	1,698
Amortization of intangibles	0	0	0	0
Acquisition-related Contingent Consideration Fair Value Adjustments				0
Goodwill impairment		0		0
Adjusted EBITDA	2,837	(370)	7,191	(3,821)
Operating Segments \| Search
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	13,961	26,297	24,731	51,376
Stock-based compensation expense	0	0	0	0
Depreciation	21	20	42	41
Amortization of intangibles	0	0	0	0
Acquisition-related Contingent Consideration Fair Value Adjustments				0
Goodwill impairment		0		0
Adjusted EBITDA	13,982	26,317	24,773	51,417
Operating Segments \| Emerging & Other
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	3,353	(107,781)	14,798	(112,825)
Stock-based compensation expense	355	83	707	108
Depreciation	555	279	1,252	682
Amortization of intangibles	2,046	3,611	4,330	9,143
Acquisition-related Contingent Consideration Fair Value Adjustments				0
Goodwill impairment		86,748		86,748
Adjusted EBITDA	6,309	(17,060)	21,087	(16,144)
Corporate
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	(38,284)	(36,263)	(74,391)	(74,910)
Stock-based compensation expense	14,138	13,046	24,759	25,451
Depreciation	1,660	2,501	3,313	5,049
Amortization of intangibles	0	0	0	0
Acquisition-related Contingent Consideration Fair Value Adjustments				0
Goodwill impairment		0		0
Adjusted EBITDA	$ (22,486)	$ (20,716)	$ (46,319)	$ (44,410)

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 our performance and that of our competitors. Moreover, our management uses this measure internally to evaluate the performance of our business as a whole and our individual business segments, and this measure is one of the primary metrics by which our internal budgets are based and by which management is compensated. The above items are excluded from our Adjusted EBITDA measure because these items are non-cash in nature, and we believe that by excluding these items, Adjusted EBITDA corresponds more closely to the cash operating income generated from our business, from which capital investments are made and debt is serviced. Adjusted EBITDA has certain limitations in that it does not take into account the impact to IAC's statement of operations of certain expenses.

No definition available.