Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Debt Under Vehicle Programs) (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	$ 11,998	$ 11,068
Debt Due To Avis Budget Rental Car Funding (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	10,500
Debt under vehicle programs	9,392	7,975
Deferred Finance Costs, Net	(42)	(40)
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	800
Debt under vehicle programs	702	827
International Debt Borrowings [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	2,100
Debt under vehicle programs	1,779	2,100
International Capital Leases [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	200
Debt under vehicle programs	172	215
Other (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	3	0
Debt Under Vehicle Programs [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Deferred Finance Costs, Net	$ (50)	$ (49)