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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 | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Related Party Transaction [Line Items] |  |  |  |  |
Other (income) expense, net | $ (2) | $ (3) | $ (13) | $ (6) |
Receivables from AMV | 19,640 |  | 19,640 |  | $ 17,619
Equity method investment in AMV | 405 |  | 405 |  | 422
Vehicles, net investment in lease with AMV | 100 |  | 100 |  | 74
Avis Mobility Ventures LLC (AMV) | Related Party | Avis Mobility Ventures LLC (AMV) |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Other (income) expense, net | 2 | 3 | 13 | 6 |
Equity method investment in AMV | 23 |  | 23 |  | 28
Avis Mobility Ventures LLC (AMV) | (Income) expense for services to AMV, net | Related Party | Avis Mobility Ventures LLC (AMV) |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Other (income) expense, net | 1 | 1 | 9 | (1) |
Avis Mobility Ventures LLC (AMV) | (Income) loss on equity method investment in AMV, net | Related Party | Avis Mobility Ventures LLC (AMV) |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Other (income) expense, net | 1 | $ 2 | 4 | $ 7 |
Avis Mobility Ventures LLC (AMV) | Receivables from AMV | Related Party |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Receivables from AMV | $ 4 |  | $ 4 |  | $ 3

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