XML 40 R2.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Pay vs Performance Disclosure - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |
Pay vs Performance Disclosure, Table |
​ | Pay Versus Performance Disclosure | ​
Overview ​ As required by Item 402(v) of Regulation S-K (“Item 402(v)”), we are providing certain disclosure regarding executive compensation for our Chief Executive Officer, Mr. Levin, and our other current and former NEOs as a group (collectively, the “non-CEO NEOs”) on an average basis, as well as certain performance measures, for the fiscal years ended December 31, 2023, 2022, 2021 and 2020. Amounts for Compensation Actually Paid (“CAP”) in the tables below have been calculated in accordance with Item 402(v) and do not represent amounts actually earned by or paid to our current and former NEOs for the fiscal years ended December 31, 2023, 2022, 2021 and 2020. A substantial portion of the amounts reported in the CAP columns in the tables below relates to changes in the fair value of unvested IAC equity awards over the course of the relevant fiscal year and fiscal year over fiscal year. The fair value of such awards changes as the market price of IAC common stock changes, and the vesting of such awards is subject to continued service through the applicable vesting dates (and in the case of Mr. Levin only, the satisfaction of certain IAC stock price targets). As a result, the value that may be realized by our current NEOs related to their unvested IAC equity awards cannot be determined as of the date of this proxy statement and can only be determined on the applicable vesting dates for such awards. The valuation assumptions and/or methodologies used to calculate the fair value of IAC equity awards as of the end of each fiscal year did not materially differ from those used to calculate the value of such awards as of the applicable grant dates. The fair value of outstanding IAC equity awards at vesting is calculated by multiplying the closing price of IAC common stock on the vesting date by the number of awards so vesting. Pay Versus Performance Table ​
​ | Year | ​ | ​ | Summary Compensation Table Total for CEO(1) ($) | ​ | ​ | Compensation Actually Paid to CEO(2) ($) | ​ | ​ | Average Summary Compensation Table Total for Non-CEO NEOs(3) ($) | ​ | ​ | Average Compensation Actually Paid to Non-CEO NEOs(4) ($) | ​ | ​ | Value of Initial Fixed $100 Investment based on: | ​ | ​ | GAAP Net Earnings (Loss) | ​
​ | Company TSR(5) ($) | ​ | ​ | Industry Index TSR(5) ($) | ​
​ | 2023 | ​ | ​ | ​ | $ | 5,040,756 | ​ | ​ | ​ | ​ | $ | 16,132,356 | ​ | ​ | ​ | ​ | $ | 5,008,736 | ​ | ​ | ​ | ​ | $ | 6,606,274 | ​ | ​ | ​ | ​ | $ | 125.65 | ​ | ​ | ​ | ​ | $ | 222.87 | ​ | ​ | ​ | ​ | $ | 265,942,000 | ​ | ​
​ | 2022 | ​ | ​ | ​ | $ | 4,477,703 | ​ | ​ | ​ | ​ | $ | (156,075,397) | ​ | ​ | ​ | ​ | $ | 7,730,392 | ​ | ​ | ​ | ​ | $ | (9,642,661) | ​ | ​ | ​ | ​ | $ | 106.50 | ​ | ​ | ​ | ​ | $ | 133.55 | ​ | ​ | ​ | ​ | $ | (1,170,170,000) | ​ | ​
​ | 2021 | ​ | ​ | ​ | $ | 5,365,063 | ​ | ​ | ​ | ​ | $ | (93,995,837) | ​ | ​ | ​ | ​ | $ | 2,798,740 | ​ | ​ | ​ | ​ | $ | (5,183,712) | ​ | ​ | ​ | ​ | $ | 313.54 | ​ | ​ | ​ | ​ | $ | 204.24 | ​ | ​ | ​ | ​ | $ | 597,547,000 | ​ | ​
​ | 2020 | ​ | ​ | ​ | $ | 202,403,426 | ​ | ​ | ​ | ​ | $ | 333,730,467 | ​ | ​ | ​ | ​ | $ | 32,166,360 | ​ | ​ | ​ | ​ | $ | 40,668,833 | ​ | ​ | ​ | ​ | $ | 302.20 | ​ | ​ | ​ | ​ | $ | 148.89 | ​ | ​ | ​ | ​ | $ | 269,726,000 | ​ | ​
​ (1) Represents the amount of total compensation reported for Mr. Levin for each fiscal year in the Total column of the Summary Compensation Table on page 39. Mr. Levin has served as our Chief Executive Officer for all fiscal years shown in the table above. ​ (2) In accordance with Item 402(v), the following adjustments were made to the amounts reported for Mr. Levin for each applicable fiscal year in the Total column of the Summary Compensation Table on page 39 to arrive at CAP: ​
​ | Year | ​ | ​ | Summary Compensation Table Total for CEO ($) | ​ | ​ | Minus Reported Value of Equity Awards ($) | ​ | ​ | Plus (Minus) Equity Award Adjustments(a) ($) | ​ | ​ | Compensation Actually Paid to CEO ($) | ​
​ | 2023 | ​ | ​ | ​ | $ | 5,040,756 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | 11,091,600 | ​ | ​ | ​ | ​ | $ | 16,132,356 | ​ | ​
​ | 2022 | ​ | ​ | ​ | $ | 4,477,703 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (160,553,100) | ​ | ​ | ​ | ​ | $ | (156,075,397) | ​ | ​
​ | 2021 | ​ | ​ | ​ | $ | 5,365,063 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (99,360,900) | ​ | ​ | ​ | ​ | $ | (93,995,837) | ​ | ​
​ | 2020 | ​ | ​ | ​ | $ | 202,403,426 | ​ | ​ | ​ | ​ | $ | 196,080,294 | ​ | ​ | ​ | ​ | $ | 327,407,335 | ​ | ​ | ​ | ​ | $ | 333,730,467 | ​ | ​
​ (a) Represents adjustments to the fair value of Mr. Levin’s IAC equity award holdings shown in the table above in accordance with Item 402(v), which were as follows: ​
​ | Year | ​ | ​ | Year End Fair Value of Equity Awards Granted in the Year ($) | ​ | ​ | Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards ($) | ​ | ​ | Year over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in Year ($) | ​ | ​ | Total Equity Award Adjustments ($) | ​
​ | 2023 | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | 11,091,600 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | 11,091,600 | ​ | ​
​ | 2022 | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (160,553,100) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (160,553,100) | ​ | ​
​ | 2021 | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (99,360,900) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (99,360,900) | ​ | ​
​ | 2020 | ​ | ​ | ​ | $ | 311,192,400 | ​ | ​ | ​ | ​ | $ | (45,322,181) | ​ | ​ | ​ | ​ | $ | 61,537,116 | ​ | ​ | ​ | ​ | $ | 327,407,335 | ​ | ​
The Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards from and after 2021 reflects adjustments to Mr. Levin’s equity awards in connection with the Vimeo Spin-Off. (3) Represents the average of total compensation reported for our non-CEO NEOs as a group for each fiscal year in the Total column of the Summary Compensation Table on page 39 (and, in the case of former non-CEO NEOs, in the Total column of the Summary Compensation Table in prior years’ proxy statements). ​ The names of each non-CEO NEO included for purposes of calculating the average amounts of total compensation in each fiscal year are as follows: (i) for 2023, Messrs. Diller, Halpin and Stein and Ms. Handler, (ii) for 2022, Messrs. Diller, Halpin and Stein and Ms. Handler, (iii) for 2021, Messrs. Diller and Stein, Ms. Handler and our former Executive Vice President and Chief Financial Officer, Glenn H. Schiffman, and (iv) for 2020, Messrs. Diller, Schiffman and Stein and our former Executive Vice President and General Counsel, Gregg Winiarski. (4) The dollar amounts reported in the Average CAP to Non-CEO NEOs column in the table above represent the average amount of CAP to our non-CEO NEOs as a group, calculated in accordance with Item 402(v) for each fiscal year shown in the table above. In accordance with Item 402(v), the following adjustments were made to the average amount of total compensation reported for our non-CEO NEOs as a group for each fiscal year in the Total column of the Summary Compensation Table on page 39 (and, in the case of former non-CEO NEOs, in the Total column of the Summary Compensation Table in prior years’ proxy statements): ​
​ | Year | ​ | ​ | Average Reported Summary Compensation Table Total for Non-CEO NEOs ($) | ​ | ​ | Minus Average Reported Value of Equity Awards ($) | ​ | ​ | Plus (Minus) Average Equity Award Adjustments(x) ($) | ​ | ​ | Average Compensation Actually Paid to Non-CEO NEOs ($) | ​
​ | 2023 | ​ | ​ | ​ | $ | 5,008,736 | ​ | ​ | ​ | ​ | $ | 2,624,988 | ​ | ​ | ​ | ​ | $ | 4,222,526 | ​ | ​ | ​ | ​ | $ | 6,606,274 | ​ | ​
​ | 2022 | ​ | ​ | ​ | $ | 7,730,392 | ​ | ​ | ​ | ​ | $ | 6,249,975 | ​ | ​ | ​ | ​ | $ | (11,123,079) | ​ | ​ | ​ | ​ | $ | (9,642,661) | ​ | ​
​ | 2021 | ​ | ​ | ​ | $ | 2,798,740 | ​ | ​ | ​ | ​ | $ | 562,484 | ​ | ​ | ​ | ​ | $ | (7,419,968) | ​ | ​ | ​ | ​ | $ | (5,183,712) | ​ | ​
​ | 2020 | ​ | ​ | ​ | $ | 32,166,360 | ​ | ​ | ​ | ​ | $ | 28,735,300 | ​ | ​ | ​ | ​ | $ | 37,237,773 | ​ | ​ | ​ | ​ | $ | 40,668,833 | ​ | ​
​ (x) Represents adjustments to the average fair value of non-CEO NEO equity award holdings shown in the table above in accordance with Item 402(v), which were as follows: ​
​ | Year | ​ | ​ | Average Year End Fair Value of Equity Awards Granted in the Year ($) | ​ | ​ | Year over Year Average Change in Fair Value of Outstanding and Unvested Equity Awards ($) | ​ | ​ | Year over Year Average Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year ($) | ​ | ​ | Total Average Equity Award Adjustments ($) | ​
​ | 2023 | ​ | ​ | ​ | $ | 2,588,908 | ​ | ​ | ​ | ​ | $ | 1,577,648 | ​ | ​ | ​ | ​ | $ | 55,970 | ​ | ​ | ​ | ​ | $ | 4,222,526 | ​ | ​
​ | 2022 | ​ | ​ | ​ | $ | 2,157,174 | ​ | ​ | ​ | ​ | $ | (13,289,474) | ​ | ​ | ​ | ​ | $ | 9,222 | ​ | ​ | ​ | ​ | $ | (11,123,079) | ​ | ​
​ | 2021 | ​ | ​ | ​ | $ | 581,986 | ​ | ​ | ​ | ​ | $ | (8,019,698) | ​ | ​ | ​ | ​ | $ | 17,744 | ​ | ​ | ​ | ​ | $ | (7,419,968) | ​ | ​
​ | 2020 | ​ | ​ | ​ | $ | 30,613,635 | ​ | ​ | ​ | ​ | $ | (19,857,568) | ​ | ​ | ​ | ​ | $ | 26,481,707 | ​ | ​ | ​ | ​ | $ | 37,237,773 | ​ | ​
​ (5) Total shareholder return (“TSR”) reflects the cumulative total return (assuming dividend reinvestment, as applicable) of IAC common stock and the Russell 1000 Technology Index (a peer issuer selected in accordance with applicable SEC rules), in each case, based on $100.00 invested at the close of trading on December 31, 2019 through December 30, 2023. All historical prices for IAC common stock have been adjusted to reflect the Match Separation and the Vimeo Spin-Off. Historical stock performance is not necessarily indicative of future stock performance. |  |  |
Named Executive Officers, Footnote | (1) Represents the amount of total compensation reported for Mr. Levin for each fiscal year in the Total column of the Summary Compensation Table on page 39. Mr. Levin has served as our Chief Executive Officer for all fiscal years shown in the table above. (3) Represents the average of total compensation reported for our non-CEO NEOs as a group for each fiscal year in the Total column of the Summary Compensation Table on page 39 (and, in the case of former non-CEO NEOs, in the Total column of the Summary Compensation Table in prior years’ proxy statements). ​ The names of each non-CEO NEO included for purposes of calculating the average amounts of total compensation in each fiscal year are as follows: (i) for 2023, Messrs. Diller, Halpin and Stein and Ms. Handler, (ii) for 2022, Messrs. Diller, Halpin and Stein and Ms. Handler, (iii) for 2021, Messrs. Diller and Stein, Ms. Handler and our former Executive Vice President and Chief Financial Officer, Glenn H. Schiffman, and (iv) for 2020, Messrs. Diller, Schiffman and Stein and our former Executive Vice President and General Counsel, Gregg Winiarski. |  |  |
Peer Group Issuers, Footnote | (5) Total shareholder return (“TSR”) reflects the cumulative total return (assuming dividend reinvestment, as applicable) of IAC common stock and the Russell 1000 Technology Index (a peer issuer selected in accordance with applicable SEC rules), in each case, based on $100.00 invested at the close of trading on December 31, 2019 through December 30, 2023. All historical prices for IAC common stock have been adjusted to reflect the Match Separation and the Vimeo Spin-Off. Historical stock performance is not necessarily indicative of future stock performance. |  |  |
PEO Total Compensation Amount | $ 5,040,756 | $ 4,477,703 | $ 5,365,063 | $ 202,403,426
PEO Actually Paid Compensation Amount | $ 16,132,356 | (156,075,397) | (93,995,837) | 333,730,467
Adjustment To PEO Compensation, Footnote | (2) In accordance with Item 402(v), the following adjustments were made to the amounts reported for Mr. Levin for each applicable fiscal year in the Total column of the Summary Compensation Table on page 39 to arrive at CAP: ​
​ | Year | ​ | ​ | Summary Compensation Table Total for CEO ($) | ​ | ​ | Minus Reported Value of Equity Awards ($) | ​ | ​ | Plus (Minus) Equity Award Adjustments(a) ($) | ​ | ​ | Compensation Actually Paid to CEO ($) | ​
​ | 2023 | ​ | ​ | ​ | $ | 5,040,756 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | 11,091,600 | ​ | ​ | ​ | ​ | $ | 16,132,356 | ​ | ​
​ | 2022 | ​ | ​ | ​ | $ | 4,477,703 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (160,553,100) | ​ | ​ | ​ | ​ | $ | (156,075,397) | ​ | ​
​ | 2021 | ​ | ​ | ​ | $ | 5,365,063 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (99,360,900) | ​ | ​ | ​ | ​ | $ | (93,995,837) | ​ | ​
​ | 2020 | ​ | ​ | ​ | $ | 202,403,426 | ​ | ​ | ​ | ​ | $ | 196,080,294 | ​ | ​ | ​ | ​ | $ | 327,407,335 | ​ | ​ | ​ | ​ | $ | 333,730,467 | ​ | ​
​ (a) Represents adjustments to the fair value of Mr. Levin’s IAC equity award holdings shown in the table above in accordance with Item 402(v), which were as follows: ​
​ | Year | ​ | ​ | Year End Fair Value of Equity Awards Granted in the Year ($) | ​ | ​ | Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards ($) | ​ | ​ | Year over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in Year ($) | ​ | ​ | Total Equity Award Adjustments ($) | ​
​ | 2023 | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | 11,091,600 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | 11,091,600 | ​ | ​
​ | 2022 | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (160,553,100) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (160,553,100) | ​ | ​
​ | 2021 | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (99,360,900) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | (99,360,900) | ​ | ​
​ | 2020 | ​ | ​ | ​ | $ | 311,192,400 | ​ | ​ | ​ | ​ | $ | (45,322,181) | ​ | ​ | ​ | ​ | $ | 61,537,116 | ​ | ​ | ​ | ​ | $ | 327,407,335 | ​ | ​
Non-PEO NEO Average Total Compensation Amount | $ 5,008,736 | 7,730,392 | 2,798,740 | 32,166,360
Non-PEO NEO Average Compensation Actually Paid Amount | $ 6,606,274 | (9,642,661) | (5,183,712) | 40,668,833
Adjustment to Non-PEO NEO Compensation Footnote | (4) The dollar amounts reported in the Average CAP to Non-CEO NEOs column in the table above represent the average amount of CAP to our non-CEO NEOs as a group, calculated in accordance with Item 402(v) for each fiscal year shown in the table above. In accordance with Item 402(v), the following adjustments were made to the average amount of total compensation reported for our non-CEO NEOs as a group for each fiscal year in the Total column of the Summary Compensation Table on page 39 (and, in the case of former non-CEO NEOs, in the Total column of the Summary Compensation Table in prior years’ proxy statements): ​
​ | Year | ​ | ​ | Average Reported Summary Compensation Table Total for Non-CEO NEOs ($) | ​ | ​ | Minus Average Reported Value of Equity Awards ($) | ​ | ​ | Plus (Minus) Average Equity Award Adjustments(x) ($) | ​ | ​ | Average Compensation Actually Paid to Non-CEO NEOs ($) | ​
​ | 2023 | ​ | ​ | ​ | $ | 5,008,736 | ​ | ​ | ​ | ​ | $ | 2,624,988 | ​ | ​ | ​ | ​ | $ | 4,222,526 | ​ | ​ | ​ | ​ | $ | 6,606,274 | ​ | ​
​ | 2022 | ​ | ​ | ​ | $ | 7,730,392 | ​ | ​ | ​ | ​ | $ | 6,249,975 | ​ | ​ | ​ | ​ | $ | (11,123,079) | ​ | ​ | ​ | ​ | $ | (9,642,661) | ​ | ​
​ | 2021 | ​ | ​ | ​ | $ | 2,798,740 | ​ | ​ | ​ | ​ | $ | 562,484 | ​ | ​ | ​ | ​ | $ | (7,419,968) | ​ | ​ | ​ | ​ | $ | (5,183,712) | ​ | ​
​ | 2020 | ​ | ​ | ​ | $ | 32,166,360 | ​ | ​ | ​ | ​ | $ | 28,735,300 | ​ | ​ | ​ | ​ | $ | 37,237,773 | ​ | ​ | ​ | ​ | $ | 40,668,833 | ​ | ​
​ (x) Represents adjustments to the average fair value of non-CEO NEO equity award holdings shown in the table above in accordance with Item 402(v), which were as follows: ​
​ | Year | ​ | ​ | Average Year End Fair Value of Equity Awards Granted in the Year ($) | ​ | ​ | Year over Year Average Change in Fair Value of Outstanding and Unvested Equity Awards ($) | ​ | ​ | Year over Year Average Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year ($) | ​ | ​ | Total Average Equity Award Adjustments ($) | ​
​ | 2023 | ​ | ​ | ​ | $ | 2,588,908 | ​ | ​ | ​ | ​ | $ | 1,577,648 | ​ | ​ | ​ | ​ | $ | 55,970 | ​ | ​ | ​ | ​ | $ | 4,222,526 | ​ | ​
​ | 2022 | ​ | ​ | ​ | $ | 2,157,174 | ​ | ​ | ​ | ​ | $ | (13,289,474) | ​ | ​ | ​ | ​ | $ | 9,222 | ​ | ​ | ​ | ​ | $ | (11,123,079) | ​ | ​
​ | 2021 | ​ | ​ | ​ | $ | 581,986 | ​ | ​ | ​ | ​ | $ | (8,019,698) | ​ | ​ | ​ | ​ | $ | 17,744 | ​ | ​ | ​ | ​ | $ | (7,419,968) | ​ | ​
​ | 2020 | ​ | ​ | ​ | $ | 30,613,635 | ​ | ​ | ​ | ​ | $ | (19,857,568) | ​ | ​ | ​ | ​ | $ | 26,481,707 | ​ | ​ | ​ | ​ | $ | 37,237,773 | ​ | ​
Compensation Actually Paid vs. Total Shareholder Return |  |  |  |
Compensation Actually Paid vs. Net Income |  |  |  |
Total Shareholder Return Vs Peer Group |  |  |  |
Tabular List, Table | Financial Performance Measures ​ All IAC NEOs are generally eligible for annual cash bonuses and long-term incentives on a discretionary basis. For the fiscal years covered in the tables above, IAC’s executive compensation program did not link compensation to be paid to our NEOs to the achievement of one or more specified financial performance measures, nor did it rely on other formulaic or other arithmetic approaches to determine such compensation. See Compensation Discussion and Analysis for more information on annual cash bonuses paid for 2023 performance and IAC equity awards granted to our NEOs in 2023. |  |  |
Total Shareholder Return Amount | $ 125.65 | 106.5 | 313.54 | 302.2
Peer Group Total Shareholder Return Amount | 222.87 | 133.55 | 204.24 | 148.89
Net Income (Loss) | $ 265,942,000 | (1,170,170,000) | 597,547,000 | 269,726,000
PEO Name | Mr. Levin |  |  |
PEO | Equity Awards Value In Summary Compensation Table (Grant Date Value) [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  | (196,080,294)
PEO | Total Equity Awards Adjustments [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 11,091,600 | (160,553,100) | (99,360,900) | 327,407,335
PEO | Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  | 311,192,400
PEO | Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 11,091,600 | (160,553,100) | (99,360,900) | (45,322,181)
PEO | Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  | 61,537,116
Non-PEO NEO | Equity Awards Value In Summary Compensation Table (Grant Date Value) [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (2,624,988) | (6,249,975) | (562,484) | (28,735,300)
Non-PEO NEO | Total Equity Awards Adjustments [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 4,222,526 | (11,123,079) | (7,419,968) | 37,237,773
Non-PEO NEO | Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 2,588,908 | 2,157,174 | 581,986 | 30,613,635
Non-PEO NEO | Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 1,577,648 | (13,289,474) | (8,019,698) | (19,857,568)
Non-PEO NEO | Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ 55,970 | $ 9,222 | $ 17,744 | $ 26,481,707

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToNonPeoNeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToPeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph ii + Details
Name: | ecd_CompActuallyPaidVsNetIncomeTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph i + Details
Name: | ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_NamedExecutiveOfficersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_NonPeoNeoAvgCompActuallyPaidAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_NonPeoNeoAvgTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupIssuersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupTotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_PeoActuallyPaidCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_PeoName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_PeoTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTable
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 6 + Details
Name: | ecd_TabularListTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnVsPeerGroupTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-28 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482765/220-10-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-3 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480175/815-40-65-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-8 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-9 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-11 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-11 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-4 Reference 13: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480167/946-830-55-10 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section 45 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483581/946-220-45-7 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(9)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(1)(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-3 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 20: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 60B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482689/260-10-45-60B Reference 32: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-31 Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 34: http://www.xbrl.org/2003/role/disclosureRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483499/205-20-50-7 Reference 35: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 36: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-1A Reference 37: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-1B Reference 38: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 39: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_PeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=iac_EquityAwardsValueInCompensationTableForTheApplicableYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=iac_EquityAwardsAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=iac_EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=iac_EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=iac_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_NonPeoNeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |