Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Property and equipment, net
Property, Plant and Equipment [Line Items]
Equipment	$ 1,819	$ 1,480
Less accumulated depreciation and amortization	(980)	(868)
Property and equipment, net	839	612
Land
Property, Plant and Equipment [Line Items]
Equipment	131	117
Buildings
Property, Plant and Equipment [Line Items]
Equipment	230	222
Non-rental vehicles
Property, Plant and Equipment [Line Items]
Equipment	317	187
Machinery and equipment
Property, Plant and Equipment [Line Items]
Equipment	223	182
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Equipment	402	345
Leasehold improvements
Property, Plant and Equipment [Line Items]
Equipment	$ 516	$ 427