Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Property, Plant and Equipment [Abstract]
Rental vehicles	$ 19,365	$ 17,819
Less: Accumulated depreciation	(2,244)	(2,211)
Rental Vehicles Net, Total	17,121	15,608
Vehicles held for sale	277	317
Vehicle, net investment in lease receivables	36	36
Vehicles, net	17,434	$ 15,961
Liabilities under vehicle programs	314		$ 150
Other receivables	$ 137		$ 64