Schedule Of Available Funding Under Vehicle Programs (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Capital Leases of Lessee, Contingent Rentals, Basis Spread on Variable Rate	2.00%	2.00%
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 8,500
Debt under vehicle programs	$ 8,878	$ 8,860
Avis Budget Rental Car Funding Program [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt, Weighted Average Interest Rate	3.00%	3.00%
Debt Due To Rental Car Funding [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 8,200
Total Capacity	9,083
Debt under vehicle programs	6,733	$ 6,837
Available Capacity	$ 2,350
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt, Weighted Average Interest Rate	4.00%	3.00%
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 800
Total Capacity	895
Debt under vehicle programs	577	$ 643
Available Capacity	$ 318
International Debt Borrowings
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt, Weighted Average Interest Rate	2.00%	3.00%
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 1,900
Total Capacity	2,373
Debt under vehicle programs	1,449	$ 1,187
Available Capacity	924
International Capital Leases
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	200
Total Capacity	194
Debt under vehicle programs	162	238
Available Capacity	32
Other
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity	7
Debt under vehicle programs	7	$ 8
Available Capacity	0
Debt Under Vehicle Programs [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity	12,552
Debt under vehicle programs	8,928
Available Capacity	$ 3,624