Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Available Funding Under The Vehicle Programs) (Detail) $ in Millions	Sep. 30, 2019 USD ($)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	$ 14,077
Outstanding Borrowings (b)	11,642
Available Capacity	2,435
Debt Due To Avis Budget Rental Car Funding (Member)
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	10,000
Outstanding Borrowings (b)	7,910
Available Capacity	2,090
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	9,400
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	935
Outstanding Borrowings (b)	923
Available Capacity	12
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	1,200
International Debt Borrowings [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	2,889
Outstanding Borrowings (b)	2,592
Available Capacity	297
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	3,000
International Capital Leases [Domain]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity (a)	253
Outstanding Borrowings (b)	217
Available Capacity	36
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 300