Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Property, Plant and Equipment [Abstract]
Rental vehicles	$ 15,768	$ 14,612
Less: Accumulated depreciation	(1,955)	(1,911)
Rental Vehicles Net, Total	13,813	12,701
Vehicles held for sale	174	165
Vehicles, net	13,987	$ 12,866
Liabilities under vehicle programs	150		$ 344
Other receivables	$ 64		$ 195