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DEBT AND NON-RECOURSE DEBT - Additional Information (Details) - USD ($) $ in Millions			6 Months Ended
	Jan. 31, 2025	Jan. 30, 2025	Jun. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Remaining borrowing capacity			$ 794
Accumulated other comprehensive loss, qualifying as hedge			24	$ 37
Reserves Related to Non-Recourse Debt
Debt Instrument [Line Items]
Restricted cash			84	193
Securitized
Debt Instrument [Line Items]
Timeshare financing receivables, gross			300
Line of Credit
Debt Instrument [Line Items]
Debt issuance costs			38	39
Secured Debt
Debt Instrument [Line Items]
Debt issuance costs			$ 22	21
Term loan B with a rate of 6.327%, due 2028 \| Line of Credit
Debt Instrument [Line Items]
Debt instrument, stated interest rate (as a percent)			6.327%
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
Repayments of debt			1,088
Timeshare Facility Due 2025 \| Secured Debt
Debt Instrument [Line Items]
Remaining borrowing capacity			120
Securitized Debt
Debt Instrument [Line Items]
Repayments of debt			423
Revolving Credit Facility
Debt Instrument [Line Items]
Debt issuance costs			5	$ 3
Revolving Credit Facility \| Senior Secured Credit Facilities
Debt Instrument [Line Items]
Letters of credit outstanding, amount			$ 46
Revolving Credit Facility \| Term loan B with a rate of 6.327%, 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