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Related Party Transactions (Schedule of Equity Method Investment in Balance Sheet and Statements of Comprehensive (Income) Expense) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Related Party Transaction [Line Items] |  |  |  |  |
Other (income) expense, net | $ (5) | $ (2) | $ (11) | $ (3) |
Receivables from AMV | 20,510 |  | 20,510 |  | $ 17,619
Equity method investment in AMV | 413 |  | 413 |  | 422
Vehicles, net investment in lease with AMV | 92 |  | 92 |  | 74
Avis Mobility Ventures LLC (AMV) | Related Party | Avis Mobility Ventures LLC (AMV) |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Other (income) expense, net | 5 | 2 | 11 | 3 |
Equity method investment in AMV | 25 |  | 25 |  | 28
Avis Mobility Ventures LLC (AMV) | Administrative Services | Related Party | Avis Mobility Ventures LLC (AMV) |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Other (income) expense, net | 4 | 0 | 8 | (2) |
Avis Mobility Ventures LLC (AMV) | Equipment Investment | Related Party | Avis Mobility Ventures LLC (AMV) |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Other (income) expense, net | 1 | $ 2 | 3 | $ 5 |
Avis Mobility Ventures LLC (AMV) | Receivables from AMV | Related Party |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Receivables from AMV | $ 7 |  | $ 7 |  | $ 3

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