Organization, Description of Business and Basis of Presentation	6 Months Ended
	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Description of Business and Basis of Presentation	Organization, Description of Business and Basis of Presentation United Rentals, Inc. (“Holdings,” “URI” or the “Company”) is principally a holding company and conducts its operations primarily through its wholly owned subsidiary, United Rentals (North America), Inc. (“URNA”), and subsidiaries of URNA. Holdings’ primary asset is its sole ownership of all issued and outstanding shares of common stock of URNA. URNA’s various credit agreements and debt instruments place restrictions on its ability to transfer funds to its shareholder. We rent equipment to a diverse customer base that includes construction and industrial companies, manufacturers, utilities, municipalities, homeowners and government entities. We primarily operate in the United States and Canada, and have a limited presence in Europe, Australia and New Zealand. In addition to renting equipment, we sell new and used rental equipment, as well as related contractor supplies, parts and service. We have prepared the accompanying unaudited condensed consolidated financial statements in accordance with the accounting policies described in our annual report on Form 10-K for the year ended December 31, 2023 (the “2023 Form 10-K”) and the interim reporting requirements of Form 10-Q. Accordingly, certain information and note disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted. These unaudited condensed consolidated financial statements should be read in conjunction with the 2023 Form 10-K. In our opinion, all adjustments, consisting only of normal recurring adjustments, which are necessary for a fair presentation of financial condition, operating results and cash flows for the interim periods presented have been made. Interim results of operations are not necessarily indicative of the results of the full year. New Accounting Pronouncements Improvements to Reportable Segment Disclosures. In November 2023, the FASB issued ASU 2023-07, which expands reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The amendments in the ASU require, among other things, disclosure of significant segment expenses that are regularly provided to an entity's chief operating decision maker (“CODM”) and a description of other segment items (the difference between segment revenue less the segment expenses disclosed under the significant expense principle and each reported measure of segment profit or loss) by reportable segment, as well as disclosure of the title and position of the CODM, and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. Annual disclosures are required for fiscal years beginning after December 15, 2023 and interim disclosures are required for periods within fiscal years beginning after December 15, 2024. Retrospective application is required, and early adoption is permitted. These requirements are not expected to have an impact on our financial statements, but will result in significantly expanded reportable segment disclosures. Improvements to Income Tax Disclosures. In December 2023, the FASB issued ASU 2023-09, which requires disclosure of disaggregated income taxes paid, prescribes standard categories for the components of the effective tax rate reconciliation, and modifies other income tax-related disclosures. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024, may be applied prospectively or retrospectively, and allows for early adoption. These requirements are not expected to have an impact on our financial statements, but will impact our income tax disclosures.