Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Debt Under Vehicle Programs) (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt under vehicle programs	$ 10,408	$ 6,857
Deferred financing fees	(46)	(48)
Americas - Debt due to Avis Budget Rental Car Funding
Debt Instrument [Line Items]
Debt under vehicle programs	8,216	5,116
Americas - Debt borrowings
Debt Instrument [Line Items]
Debt under vehicle programs	622	509
International - Debt borrowings
Debt Instrument [Line Items]
Debt under vehicle programs	1,443	1,115
International - Finance leases
Debt Instrument [Line Items]
Debt under vehicle programs	175	162
Other
Debt Instrument [Line Items]
Debt under vehicle programs	1	0
Vehicle backed debt
Debt Instrument [Line Items]
Deferred financing fees	(49)	(45)
Avis budget rental car funding | Vehicle backed debt
Debt Instrument [Line Items]
Deferred financing fees	$ (43)	$ (36)