Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Available Funding Under The Vehicle Programs) (Detail) $ in Millions	Jun. 30, 2018 USD ($)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	$ 13,275
Outstanding Borrowings (b)	11,824
Available Capacity	1,451
Debt Due To Avis Budget Rental Car Funding (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	8,988
Outstanding Borrowings (b)	8,298
Available Capacity	690
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	9,800
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	971
Outstanding Borrowings (b)	912
Available Capacity	59
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	1,300
International Debt Borrowings [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	3,081
Outstanding Borrowings (b)	2,399
Available Capacity	682
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	2,600
International Capital Leases [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	231
Outstanding Borrowings (b)	211
Available Capacity	20
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	200
Other (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	4
Outstanding Borrowings (b)	4
Available Capacity	$ 0