Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Vehicle Rental Activities [Abstract]
Rental vehicles	$ 12,285	$ 11,006
Less: Accumulated depreciation	(1,474)	(1,465)
Rental Vehicles Net, Total	10,811	9,541
Vehicles held for sale	793	674
Vehicles, net	11,604	$ 10,215
Accounts Payable, Other, Current	183		$ 192
Other Receivables	$ 635		$ 627