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Summary of Significant Accounting Policies | 9 Months Ended
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Sep. 30, 2025
Summary Of Significant Accounting Policies [Abstract] |
Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States (“GAAP”) for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) and certain reclassifications considered necessary for a fair presentation have been included. Operating results for the nine months ended September 30, 2025 are not necessarily indicative of the results that may be expected for the year ending December 31, 2025. In preparation of the Company’s financial statements in conformity with accounting principles generally accepted in the United States, management makes estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. The balance sheets at December 31, 2024 have been derived from the audited financial statements at that date but do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. For further information, including definitions of capitalized terms not defined herein, refer to the consolidated financial statements and footnotes thereto included in the Company’s and the Operating Partnership’s Annual Report on Form 10-K for the year ended December 31, 2024. Income and Other Taxes EQR has elected to be taxed as a REIT. This, along with the nature of the operations of its operating properties, resulted in no provision for federal income taxes at the EQR level. In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their allocable share of income or loss in their tax returns; therefore no provision for federal income taxes has been made at the ERPOP level. Historically, the Company has generally only incurred certain state and local income, excise and franchise taxes. The Company has elected taxable REIT subsidiary (“TRS”) status for certain of its corporate subsidiaries and, as a result, these entities will incur both federal and state income taxes on any taxable income of such entities after consideration of any net operating losses. Recent Accounting Pronouncements In November 2024, the Financial Accounting Standards Board (“FASB”) issued a new standard on disaggregation of income statement expenses, which requires an entity to disclose, on an annual and interim basis, disaggregated information about certain income statement expense line items in a tabular format in the notes to the financial statements. The standard will be effective for annual reporting periods beginning after December 15, 2026 and for interim reporting periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted, and may be applied either prospectively or retrospectively. The Company is currently evaluating the impact of the new rules on its disclosures. In March 2024, the Securities and Exchange Commission ("SEC") adopted final rules that will require certain climate-related information in registration statements and annual reports. In April 2024, the SEC voluntarily stayed the new rules as a result of pending legal challenges. In March 2025, the SEC voted to end its defense of the rules. The new rules include a requirement to disclose material climate-related risks, descriptions of board and management oversight and risk management activities, the material impacts of these risks on a registrant’s strategy, business model and outlook, and any material climate-related targets or goals, as well as material effects and costs of severe weather events and other natural conditions and greenhouse gas emissions. Prior to the stay of the new rules, they would have been effective for annual periods beginning January 1, 2025, except for the greenhouse gas emissions disclosures, which would have been effective for annual periods beginning January 1, 2026. The Company is currently monitoring the legal challenges and evaluating the potential impact of the new rules on its disclosures. In December 2023, the FASB issued an amendment to the income tax standards which requires disclosure enhancements and further transparency to certain income tax disclosures, most notably the tax rate reconciliation and income taxes paid. The new standard will be effective for annual periods beginning January 1, 2025 and will be applied on a prospective basis with the option to apply the standard retrospectively. Due to the nature of the Company's operations and the immaterial amount of income taxes incurred/paid due to its status as a REIT, we expect the adoption of the standard to have no impact on its disclosures. See the Income and Other Taxes section above for additional discussion. In November 2023, the FASB issued an amendment to the segment reporting standards which requires disclosure for each reportable segment, on an interim and annual basis, of the significant expense categories and amounts that are regularly provided to the chief operating decision maker and included in each reported measure of a segment’s profit or loss. Additionally, it requires disclosure of the title and position of the individual or the name of the group or committee identified as the chief operating decision maker. The Company adopted the standard when effective for annual periods beginning January 1, 2024 and interim periods beginning January 1, 2025 on a retrospective basis. See Note 12 for further discussion. In March 2020, the FASB issued an amendment to the reference rate reform standard which provides the option for a limited period of time to ease the potential burden in accounting for, or recognizing the effects of, reference rate reform on contract modifications and hedge accounting. The new standard was effective for the Company upon issuance and elections could be made through December 31, 2024. The Company elected to apply the hedge accounting expedients and application of these expedients preserves the presentation of derivatives consistent with past presentation.

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- Definition The entire disclosure for all significant accounting policies of the reporting entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/235/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483426/235-10-50-1 + Details
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