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Financial Instruments (Schedule of Carrying Amounts and Estimated Fair Values) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Long-term debt | $ 6,020 | $ 5,373
Carrying Amount | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term debt and current portion of long-term debt | 38 | 20
Long-term debt | 6,020 | 5,373
Carrying Amount | Interest rate swaps and interest rate caps | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest rate swaps and interest rate caps | 0 | 12
Carrying Amount | Vehicle-backed debt due to Avis Budget Rental Car Funding | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | 4,368 | 3,441
Carrying Amount | Avis Budget Rental Car Funding | Vehicle-backed debt due to Avis Budget Rental Car Funding | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | 14,894 | 14,083
Estimated Fair Value | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term debt and current portion of long-term debt | 38 | 20
Long-term debt | 6,181 | 5,452
Estimated Fair Value | Interest rate swaps and interest rate caps | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest rate swaps and interest rate caps | 0 | 12
Estimated Fair Value | Vehicle-backed debt due to Avis Budget Rental Car Funding | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | 4,397 | 3,469
Estimated Fair Value | Avis Budget Rental Car Funding | Vehicle-backed debt due to Avis Budget Rental Car Funding | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | $ 15,134 | $ 14,154

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