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Financial Instruments - Schedule Of Carrying Amounts And Estimated Fair Values (Detail) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term debt and current portion of long-term debt | $ 19 | $ 19
Long-term debt | 3,990 | 4,191
Carrying Amount | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term debt and current portion of long-term debt | 19 | 19
Long-term debt | 3,990 | 4,191
Carrying Amount | Level 2 | Interest rate swaps and interest rate caps |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest rate swaps and interest rate caps | 14 | 2
Carrying Amount | Vehicle-Backed Debt | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | 2,528 | 1,775
Carrying Amount | Vehicle-backed debt due to Avis Budget Rental Car Funding | Vehicle-Backed Debt | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | 8,848 | 5,080
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 | 18 | 18
Long-term debt | 4,153 | 4,337
Estimated Fair Value | Level 2 | Interest rate swaps and interest rate caps |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest rate swaps and interest rate caps | 14 | 2
Estimated Fair Value | Vehicle-Backed Debt | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | 2,559 | 1,796
Estimated Fair Value | Vehicle-backed debt due to Avis Budget Rental Car Funding | Vehicle-Backed Debt | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Vehicle-backed debt | $ 9,009 | $ 5,317

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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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