Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Available Funding Under The Vehicle Programs) (Detail) $ in Millions	Mar. 31, 2020 USD ($)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	$ 13,388
Outstanding Borrowings (b)	12,048
Available Capacity	1,340
Debt Due To Avis Budget Rental Car Funding (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	9,392
Outstanding Borrowings (b)	9,392
Available Capacity	0
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	10,500
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	909
Outstanding Borrowings (b)	702
Available Capacity	207
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	800
International Debt Borrowings [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	2,880
Outstanding Borrowings (b)	1,779
Available Capacity	1,101
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	2,100
International Capital Leases [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	204
Outstanding Borrowings (b)	172
Available Capacity	32
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	200
Other Debt Obligations [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	3
Outstanding Borrowings (b)	3
Available Capacity	$ 0