Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Vehicle Rental Activities [Abstract]
Rental vehicles	$ 13,691	$ 12,548
Less: Accumulated depreciation	(1,524)	(1,670)
Rental Vehicles Net, Total	12,167	10,878
Vehicles held for sale	585	596
Vehicles, net	12,752	$ 11,474
Accounts Payable, Other, Current	297		$ 269
Other Receivables	$ 693		$ 757