Debt under Vehicle Programs and Borrowing Arrangements - Schedule Of Debt Under Vehicle Programs (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total	$ 17,536	$ 18,937
Deferred financing fees	60	55
Americas – Debt due to Avis Budget Rental Car Funding
Debt Instrument [Line Items]
Total	14,143	15,502
Debt Due To Rental Car Funding, Class R Notes
Debt Instrument [Line Items]
Total	751	841
Americas – Debt borrowings
Debt Instrument [Line Items]
Total	1,160	1,075
International – Debt borrowings
Debt Instrument [Line Items]
Total	2,159	2,203
International – Finance leases
Debt Instrument [Line Items]
Total	143	172
Other
Debt Instrument [Line Items]
Total	8	55
Deferred financing fees
Debt Instrument [Line Items]
Deferred financing fees	(77)	(70)
Deferred financing fees | Avis Budget Rental Car Funding
Debt Instrument [Line Items]
Deferred financing fees	$ 60	$ 61