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ACQUISITIONS AND DIVESTITURES - Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 22, 2022 | May 17, 2022 | Dec. 31, 2021
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Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] |  |  |  |  |
Goodwill | $ 5,142,838 | $ 5,029,312 |  |  | $ 3,480,997
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Goodwill | $ 5,142,838 | $ 5,029,312 |  |  | $ 3,480,997
LeoVegas |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] |  |  |  |  |
Cash and cash equivalents |  |  | $ 93,407 |  |
Receivables and other current assets |  |  | 36,872 |  |
Goodwill |  |  | 288,367 |  |
Other long-term assets |  |  | 19,181 |  |
Accounts payable, accrued liabilities, and other current liabilities |  |  | (118,302) |  |
Debt |  |  | (104,439) |  |
Other long-term liabilities |  |  | (36,457) |  |
Noncontrolling interests |  |  | (2,861) |  |
Total assets acquired and liabilities assumed less noncontrolling interest |  |  | 555,695 |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Cash and cash equivalents |  |  | 93,407 |  |
Receivables and other current assets |  |  | 36,872 |  |
Goodwill |  |  | 288,367 |  |
Other long-term assets |  |  | 19,181 |  |
Accounts payable, accrued liabilities, and other current liabilities |  |  | (118,302) |  |
Other long-term liabilities |  |  | (36,457) |  |
Assets acquired and liabilities assumed |  |  | 556,000 |  |
LeoVegas | Technology |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] |  |  |  |  |
Technology |  |  | 109,027 |  |
LeoVegas | Trademarks |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] |  |  |  |  |
Intangible assets, other than goodwill |  |  | 144,374 |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Intangible assets, other than goodwill |  |  | 144,374 |  |
LeoVegas | Customer lists |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] |  |  |  |  |
Intangible assets, other than goodwill |  |  | 126,526 |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Intangible assets, other than goodwill |  |  | $ 126,526 |  |
Cosmopolitan of Las Vegas |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] |  |  |  |  |
Cash and cash equivalents |  |  |  | $ 80,670 |
Receivables and other current assets |  |  |  | 94,354 |
Goodwill |  |  |  | 1,289,468 |
Other long-term assets |  |  |  | 23,709 |
Accounts payable, accrued liabilities, and other current liabilities |  |  |  | (145,136) |
Other long-term liabilities |  |  |  | (1,570) |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Cash and cash equivalents |  |  |  | 80,670 |
Receivables and other current assets |  |  |  | 94,354 |
Property and equipment |  |  |  | 120,912 |
Goodwill |  |  |  | 1,289,468 |
Operating lease right-of-use-assets, net |  |  |  | 3,404,894 |
Other long-term assets |  |  |  | 23,709 |
Accounts payable, accrued liabilities, and other current liabilities |  |  |  | (145,136) |
Operating lease liabilities |  |  |  | (3,401,815) |
Other long-term liabilities |  |  |  | (1,570) |
Assets acquired and liabilities assumed |  |  |  | 1,690,486 |
Cosmopolitan of Las Vegas | Trademarks |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] |  |  |  |  |
Intangible assets, other than goodwill |  |  |  | 130,000 |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Intangible assets, other than goodwill |  |  |  | 130,000 |
Cosmopolitan of Las Vegas | Customer lists |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] |  |  |  |  |
Intangible assets, other than goodwill |  |  |  | 95,000 |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Intangible assets, other than goodwill |  |  |  | $ 95,000 |

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