Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Debt Under Vehicle Programs) (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	$ 8,341,000,000	$ 8,116,000,000
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	8,500,000,000
Debt under vehicle programs	6,838,000,000	6,340,000,000
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	832,000,000
Debt under vehicle programs	602,000,000	746,000,000
International Debt Borrowings [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	1,100,000,000
Debt under vehicle programs	591,000,000	685,000,000
International Capital Leases [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	283,000,000
Debt under vehicle programs	289,000,000	314,000,000
Other (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	$ 21,000,000	$ 31,000,000