Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Vehicle Rental Activities [Abstract]
Rental vehicles	$ 11,924	$ 10,234
Less: Accumulated depreciation	(1,434)	(1,411)
Rental Vehicles Net, Total	10,490	8,823
Vehicles held for sale	994	759
Vehicles, net	11,484	9,582
Accounts Payable, Other, Current	192		221
Other Receivables	$ 627		$ 500