Debt Under Vehicle Programs and Borrowing Arrangements (Schedule of Available Funding Under the Vehicle Programs) (Details) $ in Millions	Jun. 30, 2024 USD ($)
Debt Instrument [Line Items]
Total Capacity	$ 22,527
Outstanding Borrowings	19,626
Available Capacity	2,901
Americas - Debt due to Avis Budget Rental Car Funding | Affiliated Entity
Debt Instrument [Line Items]
Total Capacity	17,773
Outstanding Borrowings	15,633
Available Capacity	2,140
Americas - Debt due to Avis Budget Rental Car Funding | Affiliated Entity | Secured Debt
Debt Instrument [Line Items]
Outstanding Borrowings	18,000
Americas - Debt borrowings
Debt Instrument [Line Items]
Total Capacity	1,318
Outstanding Borrowings	1,237
Available Capacity	81
Americas - Debt borrowings | Secured Debt
Debt Instrument [Line Items]
Outstanding Borrowings	1,700
International - Debt borrowings
Debt Instrument [Line Items]
Total Capacity	3,146
Outstanding Borrowings	2,533
Available Capacity	613
International - Debt borrowings | Secured Debt
Debt Instrument [Line Items]
Outstanding Borrowings	3,200
International - Finance leases
Debt Instrument [Line Items]
Total Capacity	253
Outstanding Borrowings	186
Available Capacity	67
International - Finance leases | Secured Debt
Debt Instrument [Line Items]
Outstanding Borrowings	200
Other
Debt Instrument [Line Items]
Total Capacity	37
Outstanding Borrowings	37
Available Capacity	$ 0