Vehicle Rental Activities - Components of Company's Vehicles (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Rental vehicles	$ 23,114	$ 17,819
Less: Accumulated depreciation	(2,639)	(2,211)
Rental Vehicles net, total	20,475	15,608
Vehicles held for sale	734	317
Vehicles, net investment in lease	31	36
Vehicles, net	21,240	15,961
Other accounts payables	287	265	$ 142
Receivables due from former subsidiaries	$ 237	$ 212	$ 134