Related Party Transactions - Equity Method Investment in Balance Sheet and Statements of Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Other (income) expense, net	$ (18)	$ (9)	$ (3)
Vehicles, net	18,720	17,619
Other non-current assets	403	422
Vehicles, net investment in lease	136	74
Avis Mobility Ventures LLC (AMV) | Related Party | Avis Mobility Ventures LLC (AMV)
Related Party Transaction [Line Items]
Other (income) expense, net	18	9	3
Other non-current assets	30	28
Avis Mobility Ventures LLC (AMV) | Administrative Services | Related Party | Avis Mobility Ventures LLC (AMV)
Related Party Transaction [Line Items]
Other (income) expense, net	11	2	(22)
Avis Mobility Ventures LLC (AMV) | Equipment Investment | Related Party | Avis Mobility Ventures LLC (AMV)
Related Party Transaction [Line Items]
Other (income) expense, net	7	7	$ 25
Avis Mobility Ventures LLC (AMV) | Receivables From Related Party | Related Party
Related Party Transaction [Line Items]
Vehicles, net	$ 6	$ 3