Debt (Summary Of Outstanding Debt Maturities) (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
||
|---|---|---|---|---|
| Debt Instrument [Line Items] | ||||
| Within 1 year | $ 636 | |||
| Between 1 and 2 years | 291 | |||
| Between 2 and 3 years | 439 | |||
| Between 3 and 4 years | 2,387 | |||
| Between 4 and 5 years | 1,093 | |||
| Thereafter | 1,220 | |||
| Total long-term debt | 6,066 | |||
| Non-Recourse Vacation Ownership Debt [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Within 1 year | 216 | |||
| Between 1 and 2 years | 275 | |||
| Between 2 and 3 years | 426 | |||
| Between 3 and 4 years | 182 | |||
| Between 4 and 5 years | 201 | |||
| Thereafter | 725 | |||
| Total long-term debt | 2,025 | |||
| Debt | ||||
| Debt Instrument [Line Items] | ||||
| Within 1 year | 420 | |||
| Between 1 and 2 years | 16 | |||
| Between 2 and 3 years | 13 | |||
| Between 3 and 4 years | 2,205 | |||
| Between 4 and 5 years | 892 | |||
| Thereafter | 495 | |||
| Total long-term debt | [1] | $ 4,041 | $ 3,474 | |
| ||||
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|