Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Vehicle Rental Activities [Abstract]
Rental vehicles	$ 12,262	$ 11,195
Less: Accumulated depreciation	(1,347)	(1,500)
Rental Vehicles Net, Total	10,915	9,695
Vehicles held for sale	1,038	963
Vehicles, net	11,953	$ 10,658
Accounts Payable, Other, Current	467		$ 428
Other Receivables	$ 331		$ 246