| Commitments and Contingencies | 9 Months Ended | 
|---|---|
| Sep. 30, 2025 | |
| Commitments and Contingencies Disclosure [Abstract] | |
| Commitments and Contingencies | Commitments and Contingencies Contingencies In 2006, we completed the spin-offs of our Realogy and Wyndham subsidiaries (now known as Anywhere Real Estate, Inc., and Wyndham Hotels and Resorts, Inc. and Travel + Leisure Co., respectively). We do not believe that the impact of any resolution of pre-existing contingent liabilities in connection with the spin-offs should result in a material liability to us in relation to our consolidated financial position or liquidity, as Anywhere Real Estate, Inc., Wyndham Hotels and Resorts, Inc. and Travel + Leisure Co. have agreed to assume responsibility for these liabilities.  We are also involved in litigation that is primarily related to the businesses of our former subsidiaries, including Realogy and Wyndham. We are entitled to indemnification from such entities for any liability resulting from such litigation. In September 2014, Dawn Valli et al. v. Avis Budget Group Inc., et al. was filed in U.S. District Court for the District of New Jersey. The plaintiffs seek to represent a purported nationwide class of certain renters of vehicles from our Avis and Budget subsidiaries from September 30, 2008 through the present. The plaintiffs seek damages in connection with claims relating to alleged misrepresentations and omissions concerning charging customers for traffic infractions and related administrative fees. In October 2023, plaintiffs’ motion for class certification was denied as to their proposed nationwide class and granted as to a subclass, created at the Court’s discretion, of Avis Preferred and Budget Fastbreak members. We have been named as a defendant in other purported consumer class action lawsuits, including a class action filed against us in New Jersey seeking damages in connection with a breach of contract claim, which the Company intends to vigorously defend. As previously reported, several shareholder plaintiffs sued the Company and management in New Jersey federal court under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, alleging misstatements and omissions about the Company’s fleet strategy in 2024. Those cases were consolidated, co-lead plaintiffs were appointed, and an amended complaint was due to be filed in October 2025. Rather than file an amended complaint, on October 13, 2025, co-lead plaintiffs dismissed the action without prejudice. On October 16, 2025, the Court entered an order dismissing the action without prejudice and closing the case.   Two shareholders filed derivative suits in the United States District Court for the District of New Jersey alleging that the Company’s directors and officers breached their fiduciary duties in connection with the Company’s fleet strategy in 2024. The Company is named as a nominal defendant. On October 23, 2025, plaintiffs agreed to dismiss their cases without prejudice, which is subject to court approval.  In September 2025, we received a net pro rata settlement distribution of approximately $114 million in connection with the Company’s participation in a class action settlement in the In re Automotive Parts Antitrust Litigation, No. 2:12-md-02311 (E.D. Mich.), which is included within operating expenses in the Condensed Consolidated Statements of Comprehensive Income.  We are currently involved, and in the future may be involved, in claims and/or legal proceedings, including class actions, and governmental inquiries that are incidental to our vehicle rental and car sharing operations, including, among others, contract and licensee disputes, competition matters, employment and wage-and-hour claims, insurance and liability claims, intellectual property claims, business practice disputes and other regulatory, environmental, commercial and tax matters. In addition, we are a defendant in a number of legal proceedings for personal injury arising from the operation of our vehicles.  Litigation is inherently unpredictable and, although we believe that our accruals are adequate and/or that we have valid defenses in these matters, unfavorable resolutions could occur. We estimate that the potential exposure resulting from adverse outcomes of current legal proceedings in which it is reasonably possible that a loss may be incurred could, in the aggregate, be up to approximately $45 million in excess of amounts accrued as of September 30, 2025. We do not believe that the impact should result in a material liability to us in relation to our consolidated financial condition or results of operations. Commitments to Purchase Vehicles We maintain agreements with vehicle manufacturers under which we have agreed to purchase approximately $4.2 billion of vehicles from manufacturers over the next 12 months, a $2.1 billion decrease compared to December 31, 2024, financed primarily through the issuance of vehicle-backed debt and cash received upon the disposition of vehicles. Certain of these commitments are subject to the vehicle manufacturers satisfying their obligations under their respective repurchase and guaranteed depreciation agreements. Concentrations Concentrations of credit risk as of September 30, 2025 include risks related to our repurchase and guaranteed depreciation agreements with domestic and foreign car manufacturers and primarily with respect to receivables for program cars that have been disposed of, but for which we have not yet received payment from the manufacturers. |