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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Ownership interest (in percent) |  |  | 100.00% |  |
Fair value of investment | $ 415 |  | $ 415 |  | $ 388
Net gain (loss) on equity investments | (6) | $ 48 | 27 | $ (2) |
Loss reserve for accounts receivable | 142 |  | 142 |  | 135
Accrual for property and equipment within accounts payable | 82 |  | 82 |  | 109
Write-downs and impairment | 93 |  |  |  |
Empire City Gaming License | Empire City Reporting Unit |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Impairment of intangible assets | 52 |  |  |  |
Food and Beverage Revenue |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Lease revenue | 18 | 21 | 54 | 62 |
Entertainment Retail and Other Revenue |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Lease revenue | 30 | 28 | 88 | 86 |
MGM Grand Paradise SA | June 2022 Sub Concession Extension Contract |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Obligation amount | 87 |  | 87 |  | 87
Foreign Exchange Forward |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Derivative asset | 1 |  | 1 |  |
Derivative liability | 39 |  | 39 |  | 96
Derivative liability current |  |  |  |  | 57
Derivative liability noncurrent |  |  |  |  | $ 39
Net gain (loss) on derivative | $ (41) | $ 87 | $ 34 | $ (13) |
Bellagio REIT Venture |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Ownership interest by noncontrolling owner (in percent) | 5.00% |  | 5.00% |  |

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