Related Party Transactions (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Oct. 31, 2023	Aug. 31, 2023	Sep. 01, 2022
Related Party Transaction [Line Items]
Contributions from non-controlling interests			$ 24.0	$ 38.0
Non-controlling interests		$ 6.0	3.0
Assets		32,569.0	25,927.0
Other (income) expense, net		(3.0)	7.0	$ 0.0
Vehicles, net		21,240.0	15,961.0
Vehicles, net investment in lease		31.0	36.0
Other non-current assets		441.0	499.0
Avis Mobility Ventures LLC (AMV) | Receivables From Related Party | Related Party
Related Party Transaction [Line Items]
Vehicles, net		2.0	6.0
Avis Mobility Ventures LLC (AMV) | Avis Mobility Ventures LLC (AMV) | Related Party
Related Party Transaction [Line Items]
Other non-current assets		24.0	49.0
Avis Mobility Ventures LLC (AMV) | Avis Mobility Ventures LLC (AMV) | Administrative Services | Related Party
Related Party Transaction [Line Items]
Other (income) expense, net		(22.0)	(7.0)
Avis Mobility Ventures LLC (AMV) | Avis Mobility Ventures LLC (AMV) | Equipment Investment | Related Party
Related Party Transaction [Line Items]
Other (income) expense, net		(25.0)	$ (10.0)
Subsidiary Equity
Related Party Transaction [Line Items]
Assets		49.0
Gain on deconsolidation		$ 10.0
Subsidiary Equity | SRS Mobility Ventures, LLC
Related Party Transaction [Line Items]
Contributions from non-controlling interests	$ 37.5
Non-controlling interests							$ 62.0
Subsidiary Equity | SRS Mobility Ventures, LLC | Company Subsidiary
Related Party Transaction [Line Items]
Ownership acquired percentage				33.34%
Ownership interest							51.00%
Subsidiary Equity | SRS Mobility Ventures, LLC | Subsidiary Equity | Maximum
Related Party Transaction [Line Items]
Ownership interest					65.00%	65.00%