Subsequent Events (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Oct. 31, 2012
Subsequent Event [Line Items]
Acquisition of apex car rentals	$ 29
Subsequent Event [Member]
Subsequent Event [Line Items]
Term loan borrowings offering	200
Floating rate	1.00%
Basis spread over variable rate	3.25%
Debt instrument maturity date	Oct. 31, 2019
Cash used to repay outstanding term loan	40
Repayments of long term borrowings	240
Asset-backed bank conduit facility, capacity decrease	250
Asset-backed bank conduit facility, capacity renewed	2,250
Asset-backed bank conduit facility, expiration date	Oct. 31, 2014
Subsequent Event [Member] | Senior Notes [Member]
Subsequent Event [Line Items]
Debt instrument maturity date	Nov. 15, 2017
Term loan borrowings offering	$ 300
Loan borrowings rate	4.875%
Interest paid semi-annually	May 15 and November15