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Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values) (Detail) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term debt and current portion of long-term debt | $ 21 | $ 19
Long-term debt | 4,277 | 4,191
Carrying Amount | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term debt and current portion of long-term debt | 21 | 19
Long-term debt | 4,277 | 4,191
Carrying Amount | Interest rate caps | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest rate swaps and interest rate caps | 4 | 2
Carrying Amount | Vehicle-backed debt due to Avis Budget Rental Car Funding | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | 2,231 | 1,775
Carrying Amount | Avis budget rental car funding | Vehicle-backed debt due to Avis Budget Rental Car Funding | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | 8,173 | 5,080
Estimated Fair Value | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term debt and current portion of long-term debt | 21 | 18
Long-term debt | 4,440 | 4,337
Estimated Fair Value | Interest rate caps | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest rate swaps and interest rate caps | 4 | 2
Estimated Fair Value | Vehicle-backed debt due to Avis Budget Rental Car Funding | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | 2,247 | 1,796
Estimated Fair Value | Avis budget rental car funding | Vehicle-backed debt due to Avis Budget Rental Car Funding | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | $ 8,450 | $ 5,317

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