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Financial Instruments (Schedule of Carrying Amounts and Estimated Fair Values) (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Long-term debt | $ 5,465 | $ 4,791
Carrying Amount | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term debt and current portion of long-term debt | 540 | 32
Long-term debt | 5,465 | 4,791
Carrying Amount | Interest rate caps | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest rate swaps and interest rate caps | 13 | 74
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 | 4,043 | 3,422
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 | 13,837 | 15,441
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 | 546 | 32
Long-term debt | 5,517 | 4,812
Estimated Fair Value | Interest rate caps | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest rate swaps and interest rate caps | 13 | 74
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 | 4,075 | 3,435
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 | $ 13,981 | $ 15,238

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