Schedule Of Available Funding Under Vehicle Programs (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 8,600
Debt under vehicle programs	8,860	$ 8,056
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	8,400
Total Capacity	8,892
Debt under vehicle programs	6,837	6,340
Available Capacity	2,055
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	900
Total Capacity	983
Debt under vehicle programs	643	746
Available Capacity	340
International Debt Borrowings
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	1,500
Total Capacity	2,109
Debt under vehicle programs	1,187	685
Available Capacity	922
International Capital Leases
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	200
Total Capacity	259
Debt under vehicle programs	238	314
Available Capacity	21
Other
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity	8
Debt under vehicle programs	8	$ 31
Available Capacity	0
Debt Under Vehicle Programs [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity	12,251
Debt under vehicle programs	8,913
Available Capacity	$ 3,338