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COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Loss Contingencies
Guarantees, fair value disclosure	$ 175		$ 213
Self insurance reserve, current	50		46
Self-insurance liabilities, noncurrent	86		83
Surety bonds	117
Loss contingency, estimate of possible loss	0
Renovation Project
Loss Contingencies
Other commitment	32
Letter of Credit
Loss Contingencies
Maximum borrowing capacity	109
Reducing capacity under revolving credit facility	$ 3
Various US
Loss Contingencies
Multiemployer plans, collective-bargaining arrangement, percentage of participants	22.00%
Contingent Consideration
Loss Contingencies
Contingent consideration	$ 202	$ 209	217	$ 95	$ 104	$ 115
Bahia Principe
Loss Contingencies
Outstanding liability balance	355
Playa Hotels Acquisition
Loss Contingencies
Outstanding liability balance	7
Playa Hotels Acquisition | Minimum Purchase Of Liquified Natural Gas
Loss Contingencies
Recorded unconditional purchase obligation	7
Guarantee Type, Other
Loss Contingencies
Maximum potential future payments	145		142
Financial Guarantee
Loss Contingencies
Maximum potential future payments	52		67
Other Long-term liabilities | Contingent Consideration
Loss Contingencies
Contingent consideration	202		214
Other Current Liabilities | Contingent Consideration
Loss Contingencies
Contingent consideration	0		3
Performance Guarantee
Loss Contingencies
Maximum potential future payments	148
Guarantor obligations, liability, current carrying value	115		113
Performance Guarantee | Other Long-term liabilities
Loss Contingencies
Guarantor obligations, liability, current carrying value	101		104
Performance Guarantee | Accrued Expenses and Other Current Liabilities
Loss Contingencies
Guarantor obligations, liability, current carrying value	14		9
Performance Test Clause Guarantee
Loss Contingencies
Guarantor obligations, liability, current carrying value	3		$ 0
Various Business Ventures
Loss Contingencies
Commitment to loan or investment	$ 666

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Loan or investment commitments that we have extended to various business ventures.

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