Vehicle Rental Activities - Components of Company's Vehicles (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Rental vehicles	$ 21,011	$ 20,094
Less: Accumulated depreciation	(2,859)	(3,143)
Rental Vehicles net, total	18,152	16,951
Vehicles held for sale	432	594
Vehicles, net investment in lease	136	74
Vehicles, net	$ 18,720	$ 17,619