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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Narrative (Details) shares in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 30, 2023 USD ($) | Jun. 30, 2023 USD ($) shares | Mar. 31, 2023 USD ($) | Jun. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) shares | Jun. 30, 2023 USD ($) investment shares | Jun. 30, 2022 USD ($) | Aug. 04, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 01, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Number of investments in marketable equity securities | investment |  |  |  |  |  | 2 |  |  |  |
Unrealized gains (loss) on marketable equity security |  | $ 1,300,000 |  | $ (28,700,000) |  | $ 100,000 | $ 5,700,000 |  |  |
Available-for-sale marketable debt securities in a continuous unrealized loss position for longer than twelve months |  | 0 |  |  |  | 0 |  |  | $ 0 |
Unrealized (loss) gain on investment in MGM Resorts International |  | (32,362,000) |  | (825,305,000) |  | 672,478,000 | (1,012,635,000) |  |  |
Investment in MGM Resorts International |  | 2,842,661,000 |  |  |  | 2,842,661,000 |  |  | $ 2,170,182,000 |
Purchases of additional preferred shares |  |  |  |  |  | 103,555,000 | 1,036,000 |  |  |
Total upward adjustments to equity securities without readily determinable fair value |  | 37,800,000 |  |  |  | 37,800,000 |  |  |  |
Total downward adjustments to equity securities without readily determinable fair value |  | (104,000,000) |  |  |  | (104,000,000) |  |  |  |
Operating lease impairment charges |  |  |  |  |  | 72,506,000 | 28,802,000 |  |  |
Mosaic Group |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Carrying amount of goodwill for which excess of fair value over carrying value is less than 20% |  | 153,600,000 |  |  |  | 153,600,000 |  |  |  |
Dotdash Meredith |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Carrying amount of indefinite-lived intangible asset for which excess of fair value over carrying value is less than 20% |  | $ 126,000,000 |  |  |  | 126,000,000 |  |  |  |
Meredith Corporation |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Contingent consideration arrangement liability |  |  |  |  |  |  |  |  |  | $ 600,000
Operating lease impairment charges |  |  | $ 44,700,000 |  |  | $ 44,700,000 |  |  |  |
Impairment of leasehold improvements |  |  | $ 25,300,000 |  |  |  |  |  |  |
MGM |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership percentage |  | 18.30% |  |  |  | 18.30% |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Investment in MGM Resorts International |  |  |  |  |  |  |  | $ 2,900,000,000 |  |
MGM |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Total number of equity securities owned (in shares) | shares |  | 64.7 |  |  |  | 64.7 |  |  |  |
Number of equity securities purchased (in shares) | shares |  |  |  |  | 4.5 |  |  |  |  |
Payments to acquire additional MGM shares |  |  |  |  | $ 202,500,000 |  |  |  |  |
Unrealized (loss) gain on investment in MGM Resorts International |  | $ (32,400,000) |  | $ (825,300,000) |  | $ 672,500,000 | $ (1,000,000,000) |  |  |
Cumulative unrealized pre-tax gain |  | 1,600,000,000 |  |  |  | 1,600,000,000 |  |  |  |
Unrealized gain (loss), impact in $2.00 change in share price |  | $ 129,400,000 |  |  |  | $ 129,400,000 |  |  |  |
Turo |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |
Purchases of additional preferred shares | $ 103,600,000 |  |  |  |  |  |  |  |  |
Ownership interest in equity method investment (as a percent) |  | 29.90% |  |  |  | 29.90% |  |  |  |

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