Basis of Presentation and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies Basis of Presentation The Company prepares its condensed consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP"). In the opinion of management, the condensed consolidated financial statements reflect all adjustments of a normal recurring nature that are necessary for a fair statement of the results for the interim periods presented. Interim results are not necessarily indicative of results for a full year. The year-end condensed consolidated balance sheet data was derived from audited financial statements, however, these condensed consolidated financial statements do not include all of the disclosures required for complete annual financial statements and, accordingly, certain information, footnotes and disclosures normally included in annual financial statements, prepared in accordance with U.S. GAAP, have been condensed or omitted in accordance with Securities and Exchange Commission ("SEC") rules and regulations. The Company believes that the disclosures made are adequate to make the information not misleading. Accordingly, the condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023, filed with the SEC on February 13, 2024. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and footnotes. Actual results could differ materially from those estimates. Significant estimates inherent in the preparation of the condensed consolidated financial statements include receivables allowances, depreciation of rental equipment, the recoverability of long-lived assets, useful lives and impairment of long-lived tangible and intangible assets including goodwill and trade name, valuation of acquired intangible assets, pension and postretirement benefits, valuation of stock-based compensation, reserves for litigation and other contingencies and accounting for income taxes, among others. Principles of Consolidation The condensed consolidated financial statements include the accounts of Herc Holdings and its wholly owned subsidiaries. In the event that the Company is a primary beneficiary of a variable interest entity, the assets, liabilities and results of operations of the variable interest entity are included in the Company's condensed consolidated financial statements. The Company accounts for investments in joint ventures using the equity method when it has significant influence but not control and is not the primary beneficiary. All significant intercompany transactions have been eliminated in consolidation. Recently Issued Accounting Pronouncements and Disclosure Rules Not Yet Adopted Improvements to Reportable Segment Disclosures In November 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update No. 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures” (“ASU 2023-07”), which is intended to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The guidance is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The guidance is to be applied retrospectively to all prior periods presented in the financial statements. Upon transition, the segment expense categories and amounts disclosed in the prior periods should be based on the significant segment expense categories identified and disclosed in the period of adoption. The Company is currently evaluating the potential impact of adopting this new guidance on its consolidated financial statements and related disclosures. Improvements to Income Tax Disclosures In December 2023, the FASB issued Accounting Standards Update No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures” (“ASU 2023-09”), which modifies the rules on income tax disclosures to require entities to disclose (1) specific categories in the rate reconciliation, (2) the income or loss from continuing operations before income tax expense or benefit (separated between domestic and foreign) and (3) income tax expense or benefit from continuing operations (separated by federal, state and foreign). ASU 2023-09 also requires entities to disclose their income tax payments to international, federal, state and local jurisdictions, among other changes. The guidance is effective for annual periods beginning after December 15, 2024. Early adoption is permitted for annual financial statements that have not yet been issued or made available for issuance. ASU 2023-09 should be applied on a prospective basis, but retrospective application is permitted. The Company is currently evaluating the potential impact of adopting this new guidance on its consolidated financial statements and related disclosures. Climate-Related Disclosure Rules In March 2024, the SEC issued final climate-related disclosure rules that will require disclosure of material climate-related risks and material direct greenhouse gas emissions from operations owned or controlled (Scope 1) and material indirect greenhouse gas emissions from purchased energy consumed in owned or controlled operations (Scope 2). Additionally, the rules require disclosure in the notes to the financial statements of the effects of severe weather events and other natural conditions, subject to certain materiality thresholds. The disclosure requirements will begin phasing in for annual periods beginning in calendar year 2025. Currently, it is uncertain whether the SEC's new climate-related disclosure rules will withstand pending and future legal challenges. In April 2024, the SEC issued an order staying implementation of the new disclosure regulations pending the resolution of certain challenges. The Company is currently in the process of analyzing the impact of the rules on its related disclosures.