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RELATED-PARTY TRANSACTIONS - Equity Method Investments Narrative (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	Feb. 28, 2024	Feb. 27, 2024
Related Party Transaction
Net receivables	$ 930		$ 930		$ 1,121
Total long-term financing receivables, net of allowances	$ 459		$ 459		368
Unconsolidated Hospitality Ventures
Related Party Transaction
Equity method investment, ownership percentage						38.80%	50.00%
Minimum | Unconsolidated Hospitality Ventures
Related Party Transaction
Equity method investment, ownership percentage	20.00%		20.00%
Maximum | Unconsolidated Hospitality Ventures
Related Party Transaction
Equity method investment, ownership percentage	50.00%		50.00%
Related Party
Related Party Transaction
Net financing receivables	$ 152		$ 152		112
Net receivables	36		36		67
Total long-term financing receivables, net of allowances	116		116		$ 45
Interest income, operating	2	$ 1	5	$ 3
Franchise or License Fees | Related Party
Related Party Transaction
Related party amounts	23	22	$ 71	$ 61
Related Parties Guarantees | Related Party
Related Party Transaction
Related party amounts	$ 0	$ 0

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