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DEBT AND NON-RECOURSE DEBT - Additional Information (Details) $ in Millions, ¥ in Billions			9 Months Ended
	Jan. 31, 2025	Jan. 30, 2025	Sep. 30, 2025 USD ($)	Aug. 31, 2025 USD ($)	Jul. 31, 2025 USD ($)	Jul. 31, 2025 JPY (¥)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Remaining borrowing capacity			$ 632
Accumulated other comprehensive loss, qualifying as hedge			21					$ 37
Reserves Related to Non-Recourse Debt
Debt Instrument [Line Items]
Restricted cash			97					193
Securitized
Debt Instrument [Line Items]
Timeshare financing receivables, gross				$ 400	$ 65	¥ 9.5	$ 300
Line of Credit
Debt Instrument [Line Items]
Debt issuance costs			35					39
Secured Debt
Debt Instrument [Line Items]
Debt issuance costs			$ 27					21
Term loan B due 2028 | Line of Credit
Debt Instrument [Line Items]
Debt instrument, stated interest rate (as a percent)			6.316%
4.88% Timeshare Facility
Debt Instrument [Line Items]
Debt instrument, face amount							$ 166
Debt instrument, stated interest rate (as a percent)							4.88%
5.18% Timeshare Facility
Debt Instrument [Line Items]
Debt instrument, face amount							$ 87
Debt instrument, stated interest rate (as a percent)							5.18%
5.52% Timeshare Facility
Debt Instrument [Line Items]
Debt instrument, face amount							$ 47
Debt instrument, stated interest rate (as a percent)							5.52%
Timeshare Facility
Debt Instrument [Line Items]
Debt issuance costs				6	$ 3		$ 6
Repayments of debt			$ 1,868
1.41% Timeshare Facility
Debt Instrument [Line Items]
Debt instrument, stated interest rate (as a percent)					1.41%	1.41%
4.54% Timeshare Facility
Debt Instrument [Line Items]
Debt instrument, face amount				$ 210
Debt instrument, stated interest rate (as a percent)				4.54%
4.73% Timeshare Facility
Debt Instrument [Line Items]
Debt instrument, face amount				$ 125
Debt instrument, stated interest rate (as a percent)				4.73%
5.12% Timeshare Facility
Debt Instrument [Line Items]
Debt instrument, face amount				$ 65
Debt instrument, stated interest rate (as a percent)				5.12%
Timeshare Facility Due 2025 | Secured Debt
Debt Instrument [Line Items]
Remaining borrowing capacity			300
Securitized Debt
Debt Instrument [Line Items]
Repayments of debt			730
Revolving Credit Facility
Debt Instrument [Line Items]
Debt issuance costs			4					$ 3
Revolving Credit Facility | Senior Secured Credit Facilities
Debt Instrument [Line Items]
Letters of credit outstanding, amount			$ 68
Revolving Credit Facility | Term loan B due 2028 | Line of Credit
Debt Instrument [Line Items]
Debt instrument, basis spread percent	2.00%	2.50%
Derivative fixed interest rate			1.55%
Derivative, notional amount			$ 550
Revolving Credit Facility | Term Loan B due 2031 | Line of Credit
Debt Instrument [Line Items]
Debt instrument, basis spread percent	2.00%	2.25%
Revolving Credit Facility | Term Loan A Due 2028 | Line of Credit
Debt Instrument [Line Items]
Debt instrument, basis spread percent	1.65%	1.75%
Cash Collateral Secured Credit Facilities
Debt Instrument [Line Items]
Letters of credit outstanding, amount			$ 1

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