Debt under Vehicle Programs And Borrowing Arrangements - Debt Issued by AESOP (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Weighted Average Interest Rate	6.04%	5.81%
Asset-backed securities, at carrying value	$ 2,839	$ 3,852
Avis Budget Rental Car Funding Program June 2029
Debt Instrument [Line Items]
Weighted Average Interest Rate	5.51%
Asset-backed securities, at carrying value	$ 1,200
Avis Budget Rental Car Funding Program April 2026
Debt Instrument [Line Items]
Weighted Average Interest Rate	6.24%
Asset-backed securities, at carrying value	$ 53
Avis Budget Rental Car Funding Program April 2028
Debt Instrument [Line Items]
Weighted Average Interest Rate	6.23%	5.36%
Asset-backed securities, at carrying value	$ 52	$ 500
Avis Budget Rental Car Funding Program October 2026
Debt Instrument [Line Items]
Weighted Average Interest Rate	6.18%	5.31%
Asset-backed securities, at carrying value	$ 37	$ 350
Avis Budget Rental Car Funding Program October 2027
Debt Instrument [Line Items]
Weighted Average Interest Rate	5.26%
Asset-backed securities, at carrying value	$ 400
Avis Budget Rental Car Funding Program December 2029
Debt Instrument [Line Items]
Weighted Average Interest Rate	5.35%
Asset-backed securities, at carrying value	$ 700
Avis Budget Rental Car Funding Program February 2026
Debt Instrument [Line Items]
Weighted Average Interest Rate	9.56%
Asset-backed securities, at carrying value	$ 88
Avis Budget Rental Car Funding Program April 2026
Debt Instrument [Line Items]
Weighted Average Interest Rate	9.56%
Asset-backed securities, at carrying value	$ 75
Avis Budget Rental Car Funding Program October 2026
Debt Instrument [Line Items]
Weighted Average Interest Rate	9.61%
Asset-backed securities, at carrying value	$ 53
Avis Budget Rental Car Funding Program February 2027
Debt Instrument [Line Items]
Weighted Average Interest Rate	9.65%	5.67%
Asset-backed securities, at carrying value	$ 61	$ 450
Avis Budget Rental Car Funding Program April 2027
Debt Instrument [Line Items]
Weighted Average Interest Rate	9.66%	5.91%
Asset-backed securities, at carrying value	$ 65	$ 476
Avis Budget Rental Car Funding Program October 2027
Debt Instrument [Line Items]
Weighted Average Interest Rate	9.67%
Asset-backed securities, at carrying value	$ 55
Avis Budget Rental Car Funding Program June 2028
Debt Instrument [Line Items]
Weighted Average Interest Rate		5.76%
Asset-backed securities, at carrying value		$ 550
Avis Budget Rental Car Funding Program December 2028
Debt Instrument [Line Items]
Weighted Average Interest Rate		5.98%
Asset-backed securities, at carrying value		$ 526
Avis Budget Rental Car Funding Program August 2027
Debt Instrument [Line Items]
Weighted Average Interest Rate		6.09%
Asset-backed securities, at carrying value		$ 300
Avis Budget Rental Car Funding Program February 2029
Debt Instrument [Line Items]
Weighted Average Interest Rate		6.21%
Asset-backed securities, at carrying value		$ 700