Vehicle Rental Activities (Components Of Vehicle Depreciation And Lease Charges) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Vehicle Rental Activities [Abstract]
Other Receivables	$ 217	$ 170	$ 217	$ 170
Depreciation expense	490	491	913	898
Lease charges	35	39	68	76
Gain on sales of vehicles, net	(27)	(13)	(51)	(24)
Vehicle depreciation and lease charges, net	$ 498	$ 517	$ 930	$ 950