Organization, Description of Business and Basis of Presentation	6 Months Ended
	Jun. 30, 2022
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, 2021 (the “2021 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 2021 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. COVID-19 The novel coronavirus (“COVID-19”) was first identified in people in late 2019. COVID-19 spread rapidly throughout the world and, in March 2020, the World Health Organization characterized COVID-19 as a pandemic. COVID-19 is a pandemic of respiratory disease spreading from person-to-person that poses a serious public health risk. The COVID-19 pandemic has significantly disrupted supply chains and businesses around the world. Uncertainty remains regarding the ongoing impact of existing and emerging variant strains of COVID-19 on the operations and financial position of United Rentals, and on the global economy. Uncertainty also remains regarding the length of time it will take for the COVID-19 pandemic to ultimately subside or become viewed as endemic, which will be impacted by the effectiveness of vaccines against COVID-19 (including against emerging variant strains), and by measures that may in the future be implemented to protect public health. The health and safety of our employees and customers remains our top priority, and we have implemented a detailed COVID-19 response plan, which is explained in more detail in “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and which we believe helped mitigate the impact of COVID-19 on our results. We began to experience a decline in revenues in March 2020, when rental volume declined in response to shelter-in-place orders and other market restrictions. The volume declines were more pronounced in 2020 than 2021, and we have seen continuing evidence of recovery across our construction and industrial markets, as well as encouraging gains in end-market indicators, as reflected in our 2022 forecast and performance through June 30, 2022. COVID-19 is discussed in more detail throughout “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”