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ACQUISITIONS AND DISPOSITIONS - Schedule of Net Assets Acquired (Details) € in Millions, $ in Millions			6 Months Ended		12 Months Ended
	Dec. 27, 2024 USD ($)	Oct. 01, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 EUR (€)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)
Business Combination [Line Items]
Cash paid, net of cash acquired			$ 1,267	$ 28
Fair value of deferred consideration			22			$ 38
Fair value of contingent consideration			$ 208			$ 214
Bahia Principe
Business Combination [Line Items]
Cash paid, net of cash acquired	$ 372
Cash acquired	2
Fair value of deferred consideration	58						€ 60
Fair value of contingent consideration	33
Total purchase consideration	$ 465				€ 419
Standard International Management, LLC
Business Combination [Line Items]
Cash paid, net of cash acquired		$ 148
Cash acquired		3
Fair value of contingent consideration		108
Total purchase consideration		$ 259

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