Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Available Funding Under The Vehicle Programs) (Detail) $ in Millions	Mar. 31, 2017 USD ($)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	$ 12,735
Outstanding Borrowings	9,552
Available Capacity	3,183
Debt Due To Avis Budget Rental Car Funding (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	9,312
Outstanding Borrowings	7,146
Available Capacity	2,166
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	8,700
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	897
Outstanding Borrowings	689
Available Capacity	208
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)	2,351
Outstanding Borrowings	1,560
Available Capacity	791
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	1,800
International Capital Leases [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	172
Outstanding Borrowings	154
Available Capacity	18
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	200
Other (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	3
Outstanding Borrowings	3
Available Capacity	$ 0