Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Available Funding Under The Vehicle Programs) (Detail) $ in Millions	Mar. 31, 2019 USD ($)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	$ 13,355
Outstanding Borrowings (b)	11,253
Available Capacity	2,102
Debt Due To Avis Budget Rental Car Funding (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	9,236
Outstanding Borrowings (b)	8,576
Available Capacity	660
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	9,900
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	926
Outstanding Borrowings (b)	655
Available Capacity	271
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	700
International Debt Borrowings [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	2,985
Outstanding Borrowings (b)	1,835
Available Capacity	1,150
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	2,000
International Capital Leases [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	207
Outstanding Borrowings (b)	186
Available Capacity	21
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	200
Other (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	1
Outstanding Borrowings (b)	1
Available Capacity	$ 0