Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property and equipment, net
Property, Plant and Equipment [Line Items]
Equipment	$ 2,200	$ 1,988
Less accumulated depreciation and amortization	(1,166)	(1,085)
Property and equipment, net	1,034	903
Land
Property, Plant and Equipment [Line Items]
Equipment	170	157
Buildings
Property, Plant and Equipment [Line Items]
Equipment	310	296
Non-rental vehicles
Property, Plant and Equipment [Line Items]
Equipment	318	268
Machinery and equipment
Property, Plant and Equipment [Line Items]
Equipment	329	265
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Equipment	463	435
Leasehold improvements
Property, Plant and Equipment [Line Items]
Equipment	$ 610	$ 567