RECEIVABLES - Schedule of Allowance for Losses and Impairments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Allowance for Losses and Impairments
Allowance beginning of period			$ 36
Allowance end of period	$ 37
Unsecured financing to hotel owners
Allowance for Losses and Impairments
Allowance beginning of period	43	$ 38	36	$ 42
Provisions (reversals), net	(1)	1	6	0
Foreign currency exchange, net			1	(1)
Write-offs	(5)	0	0	(3)
Allowance end of period	$ 37	$ 39	$ 43	$ 38

Amount of foreign currency translation gain (loss) which decreases (increases) allowance for credit loss on financing receivable. Excludes net investment in lease.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of writeoff of financing receivable, charged against allowance for credit loss.

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- Definition

Amount of credit loss expense (reversal of expense) for financing receivable.

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