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Commitments And Contingencies (Narrative) (Detail) $ in Millions | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Nov. 30, 2017 lawsuit | Nov. 30, 2011 class | Sep. 30, 2022 USD ($) | Sep. 30, 2021 USD ($)
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |
Range of possible loss (up to) |  |  | $ 35 |
Purchase obligation over the next twelve months |  |  | 4,200 |
Purchase commitment period decrease |  |  | 1,700 |
Other receivables |  |  | 225 | $ 145
Electronic Toll Service Dispute | Jose Mendez v Avis Budget Group Inc |  |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |
Number of cases brought by plaintiffs | class |  | 2 |  |
Breach of Contract | Jose Mendez v Avis Budget Group Inc |  |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |
Number of claims filed | lawsuit | 2 |  |  |
Fines And Fees Charged To Renters | Jose Mendez v Avis Budget Group Inc |  |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |
Number of claims filed | lawsuit | 1 |  |  |
Realogy |  |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |
Other receivables |  |  | 26 |
Wyndham |  |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |
Other receivables |  |  | $ 16 |

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