Vehicle Rental Activities - Components of Company's Vehicles (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Rental vehicles	$ 20,094	$ 23,114
Less: Accumulated depreciation	(3,143)	(2,639)
Rental Vehicles net, total	16,951	20,475
Vehicles held for sale	594	734
Vehicles, net investment in lease	74	31
Vehicles, net	17,619	21,240
Other accounts payables	203	287	$ 265
Receivables due from former subsidiaries	$ 287	$ 237	$ 212