Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Available Funding Under The Vehicle Programs) (Detail) $ in Millions	Sep. 30, 2020 USD ($)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	$ 12,691
Outstanding Borrowings (b)	8,384
Available Capacity	4,307
Debt Due To Avis Budget Rental Car Funding (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	8,894
Outstanding Borrowings (b)	6,144
Available Capacity	2,750
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	6,900
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	719
Outstanding Borrowings (b)	634
Available Capacity	85
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	900
International Debt Borrowings [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	2,859
Outstanding Borrowings (b)	1,449
Available Capacity	1,410
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	1,700
International Capital Leases [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	219
Outstanding Borrowings (b)	157
Available Capacity	62
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 200