FINANCIAL INSTRUMENTS - Carrying Values and Estimated Fair Values (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Vacation ownership notes receivable, net	$ 2,440	$ 2,343
Contracts receivable for financed VOI sales, net	46	37
Other assets	131	99
Total financial assets	2,617	2,479
Total financial liabilities	(5,026)	(4,956)
Carrying Amount \| Securitized debt, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	(2,136)	(2,096)
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Vacation ownership notes receivable, net	2,508	2,427
Contracts receivable for financed VOI sales, net	46	37
Other assets	131	99
Total financial assets	2,685	2,563
Total financial liabilities	(4,958)	(4,749)
Fair Value \| Securitized debt, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	(2,147)	(2,068)
2028 Notes \| Carrying Amount \| Senior notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	(348)	(348)
2028 Notes \| Fair Value \| Senior notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	(336)	(322)
2029 Notes \| Carrying Amount \| Senior notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	(496)	(495)
2029 Notes \| Fair Value \| Senior notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	(467)	(445)
2026 Convertible Notes \| Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Convertible notes, net	(572)	(568)
2026 Convertible Notes \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Convertible notes, net	(546)	(508)
2027 Convertible Notes \| Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Convertible notes, net	(566)	(563)
2027 Convertible Notes \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Convertible notes, net	(541)	(513)
Non-interest bearing note payable, net \| Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	0	(4)
Non-interest bearing note payable, net \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	0	(4)
Line of Credit \| Term Loan, net \| Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	(786)	(781)
Line of Credit \| Term Loan, net \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	(796)	(784)
Line of Credit \| Revolving Corporate Credit Facility, net \| Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	(122)	(101)
Line of Credit \| Revolving Corporate Credit Facility, net \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	$ (125)	$ (105)

Fair value portion of asset recognized for present right to economic benefit.

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Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

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Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date.

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- Definition

Fair value portion of other assets.

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- Definition

Contracts Receivable, Fair Value Disclosure

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