Schedule Of Available Funding Under Vehicle Programs (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 10,200
Debt under vehicle programs	$ 11,068	$ 10,232
Avis Budget Rental Car Funding Program [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt, Weighted Average Interest Rate	3.16%	3.20%
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	$ 8,000
Total Capacity	9,761
Debt under vehicle programs	7,975	$ 7,393
Available Capacity	$ 1,786
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt, Weighted Average Interest Rate	2.87%	3.33%
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 900
Total Capacity	1,009
Debt under vehicle programs	827	$ 635
Available Capacity	$ 182
International Debt Borrowings
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt, Weighted Average Interest Rate	1.87%	2.02%
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	$ 2,300
Total Capacity	3,003
Debt under vehicle programs	2,100	$ 2,060
Available Capacity	903
International Capital Leases
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Leasing Vehicles And Related Assets Pledged As Collateralized Debt	200
Total Capacity	237
Debt under vehicle programs	215	191
Available Capacity	22
Other
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	0	$ 2
Debt Under Vehicle Programs [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Total Capacity	14,010
Debt under vehicle programs	11,117
Available Capacity	$ 2,893