Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Debt Under Vehicle Programs) (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	$ 7,462		$ 6,806
Debt Due To Avis Budget Rental Car Funding (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	5,873	[1]	5,203	[1]
Budget Truck Financing (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	236		253
Capital Leases (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	298		315
European Rental Fleet Securitization [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	142		0
Other (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	$ 913		$ 1,035

[1] The increase principally reflects increased borrowing to fund an increase in the size of the Company’s U.S. car rental fleet.