Debt Under Vehicle Programs And Borrowing Arrangements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended	36 Months Ended
	Dec. 31, 2013	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Avis Budget Rental Car Funding Program March 2022 [Member]
Debt Instrument [Line Items]
Asset-Backed Securities, at Carrying Value				$ 600
Avis Budget Rental Car Funding Program September 2024 [Member]
Debt Instrument [Line Items]
Asset-Backed Securities, at Carrying Value				$ 650
Avis Budget Rental Car Funding Program March 2025 [Member]
Debt Instrument [Line Items]
Asset-Backed Securities, at Carrying Value			$ 650
Avis Budget Rental Car Funding Program [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate		3.16%			3.20%
European Rental Fleet Securitization [Member]
Debt Instrument [Line Items]
Newly Issued European Credit Facility	$ 500	$ 1,300
Americas Debt Borrowings [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate		2.87%			3.33%
International Debt Borrowings
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate		1.87%			2.02%