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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Goodwill And Intangible Assets [Line Items] |  |  |
Goodwill | $ 4,945,188 | $ 3,480,997 | $ 2,091,278
Total indefinite-lived intangible assets | 1,147,562 | 857,336 |
Finite-lived intangible assets, net | 1,658,601 | 2,759,049 |
Other intangible assets, net | 2,806,163 | 3,616,385 |
Gaming Subconcession | M G M Grand Paradise |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, gross | 4,491,735 | 4,516,532 |
Less: Accumulated amortization | (3,275,181) | (1,865,219) |
Finite-lived intangible assets, net | 1,216,554 | 2,651,313 |
Customer lists |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, gross | 285,841 | 52,000 |
Less: Accumulated amortization | (47,314) | (32,188) |
Finite-lived intangible assets, net | 238,527 | 19,812 |
Other gaming rights |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, gross | 106,600 | 106,600 |
Less: Accumulated amortization | (31,539) | (26,209) |
Finite-lived intangible assets, net | 75,061 | 80,391 |
Technology and other |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, gross | 136,051 | 13,207 |
Less: Accumulated amortization | (7,592) | (5,674) |
Finite-lived intangible assets, net | 128,459 | 7,533 |
Trademarks |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Total indefinite-lived intangible assets | 762,969 | 479,238 |
Gaming rights and other |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Total indefinite-lived intangible assets | $ 384,593 | $ 378,098 |

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