Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Vehicle Rental Activities [Abstract]
Rental vehicles	$ 15,466	$ 12,548
Less: Accumulated depreciation	(1,482)	(1,670)
Rental Vehicles Net, Total	13,984	10,878
Vehicles held for sale	294	596
Vehicles, net	14,278	$ 11,474
Accounts Payable, Other, Current	782		$ 856
Other Receivables	$ 214		$ 248