Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Vehicle Rental Activities [Abstract]
Rental vehicles	$ 11,964	$ 13,461
Less: Accumulated depreciation	(1,525)	(1,621)
Rental Vehicles Net, Total	10,439	11,840
Vehicles held for sale	371	337
Vehicles, net	10,810	$ 12,177
Accounts Payable, Other, Current	150		$ 782
Other Receivables	$ 419		$ 214