Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Vehicle Rental Activities [Abstract]
Rental vehicles	$ 14,400	$ 10,937
Less: Accumulated depreciation	(1,431)	(1,454)
Rental Vehicles Net, Total	12,969	9,483
Vehicles held for sale	353	981
Vehicles, net	13,322	$ 10,464
Accounts Payable, Other, Current	658		$ 557
Other Receivables	$ 235		$ 251