Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Debt Under Vehicle Programs) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Document Period End Date	Mar. 31, 2017
Debt under vehicle programs	$ 9,501	$ 8,878
Debt Due To Avis Budget Rental Car Funding (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt Instrument, Maturity Date	Sep. 01, 2022
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 8,700
Debt under vehicle programs	7,146	6,733
Deferred Finance Costs, Net	(40)	(38)
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	900
Debt under vehicle programs	689	577
International Debt Borrowings [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	1,800
Debt under vehicle programs	1,560	1,449
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	154	162
Other (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	3	7
Debt Under Vehicle Programs [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Deferred Finance Costs, Net	$ (51)	$ (50)