Debt under Vehicle Programs And Borrowing Arrangements - Debt Issued by AESOP (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023	Apr. 30, 2023	Jan. 31, 2023	Nov. 30, 2022	Jul. 31, 2022	May 31, 2022	Apr. 30, 2022
Avis Budget Rental Car Funding Program August 2027
Debt Instrument [Line Items]
Asset-backed securities, at carrying value								$ 660
Weighted Average Interest Rate								3.96%
Avis Budget Rental Car Funding Program March 2025
Debt Instrument [Line Items]
Asset-backed securities, at carrying value							$ 87
Weighted Average Interest Rate							5.43%
Avis Budget Rental Car Funding Program March 2023
Debt Instrument [Line Items]
Asset-backed securities, at carrying value							$ 68
Weighted Average Interest Rate							4.56%
Avis Budget Rental Car Funding Program September 2023
Debt Instrument [Line Items]
Asset-backed securities, at carrying value							$ 55
Weighted Average Interest Rate							5.25%
Avis Budget Rental Car Funding Program February 2026
Debt Instrument [Line Items]
Asset-backed securities, at carrying value						$ 389
Weighted Average Interest Rate						4.81%
Avis Budget Rental Car Funding Program February 2028
Debt Instrument [Line Items]
Asset-backed securities, at carrying value						$ 374
Weighted Average Interest Rate						4.99%
Avis Budget Rental Car Funding Program April 2026
Debt Instrument [Line Items]
Asset-backed securities, at carrying value					$ 500
Weighted Average Interest Rate					6.25%
Avis Budget Rental Car Funding Program April 2028
Debt Instrument [Line Items]
Asset-backed securities, at carrying value				$ 500
Weighted Average Interest Rate				5.36%
Avis Budget Rental Car Funding Program October 2026
Debt Instrument [Line Items]
Asset-backed securities, at carrying value				$ 350
Weighted Average Interest Rate				5.31%
Avis Budget Rental Car Funding Program February 2027
Debt Instrument [Line Items]
Asset-backed securities, at carrying value			$ 450
Weighted Average Interest Rate			5.67%
Avis Budget Rental Car Funding Program June 2028
Debt Instrument [Line Items]
Asset-backed securities, at carrying value			$ 550
Weighted Average Interest Rate			5.76%
Avis Budget Rental Car Funding Program April 2027
Debt Instrument [Line Items]
Asset-backed securities, at carrying value		$ 476
Weighted Average Interest Rate		5.91%
Avis Budget Rental Car Funding Program December 2028
Debt Instrument [Line Items]
Asset-backed securities, at carrying value		$ 526
Weighted Average Interest Rate		5.98%
Avis Budget Rental Car Funding Program August
Debt Instrument [Line Items]
Asset-backed securities, at carrying value	$ 300
Weighted Average Interest Rate	6.09%
Avis Budget Rental Car Funding Program February 2029
Debt Instrument [Line Items]
Asset-backed securities, at carrying value	$ 700
Weighted Average Interest Rate	6.21%