Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2025
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Principles of Consolidation and Basis of Presentation The accompanying condensed consolidated financial statements of EQC have been prepared without audit. Certain information and footnote disclosures required by U.S. generally accepted accounting principles, or GAAP, for complete financial statements have been condensed or omitted. We believe the disclosures made are appropriate. The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes contained in our Annual Report on Form 10-K, or our Annual Report, for the year ended December 31, 2024. Capitalized terms used, but not defined in this Quarterly Report, have the same meanings as in our Annual Report. In the opinion of management, all adjustments, which include only normal recurring adjustments considered necessary for a fair presentation, have been included. All intercompany transactions and balances with or among our subsidiaries have been eliminated. Operating results for interim periods are not necessarily indicative of the results that may be expected for the full year. The accompanying condensed consolidated financial statements and notes thereto have been prepared in accordance with GAAP, as contained within the Financial Accounting Standards Board, or FASB, Accounting Standards Codification, or ASC, including Subtopic 205-30, “Liquidation Basis of Accounting,” as indicated, and the rules and regulations of the SEC. Pursuant to the Company’s shareholders’ approval of the Plan of Sale on November 12, 2024, the Company adopted the liquidation basis of accounting as of and for the periods subsequent to November 1, 2024 (as the approval of the Plan of Sale by the Company’s shareholders became imminent in early November 2024 based on the results of the Company’s solicitation of proxies from its shareholders for their approval of the Plan of Sale). Accordingly, on November 1, 2024, assets were adjusted to their estimated net realizable value, or liquidation value, which represents the estimated amount of cash or other consideration that the Company expected to realize through the disposal of assets. The liquidation values of the Company’s real estate properties are presented on a net realizable value basis. Liabilities are carried at their contractual amounts due or estimated settlement amounts. The Company accrues costs and revenues that it expects to incur and earn as it carries out its liquidation activities through the end of the projected liquidation period to the extent it has a reasonable basis for estimation. Estimated costs expected to be incurred through the end of the liquidation period include budgeted property expenses and corporate overhead, costs to dispose of its real estate property, costs associated with satisfying known and contingent liabilities and other costs associated with the winding down and dissolution of the Company. Revenues are based on the in place leases at properties prior to their sale. These amounts are classified as a liability for estimated costs in excess of estimated receipts during liquidation on the consolidated statement of net assets. Actual costs and income may differ from amounts reflected in the financial statements because of the inherent uncertainty in estimating future events. These differences may be material. See Note 2, “Plan of Sale” and Note 4, “Liabilities for Estimated Costs in Excess of Estimated Receipts During Liquidation” for further discussion. Actual costs incurred but unpaid prior to the Company’s adoption of the liquidation basis of accounting on November 1, 2024, are included in accounts payable and accrued expenses and distributions payable on the consolidated statement of net assets. All our liabilities under either the going concern basis of accounting or the liquidation basis of accounting are derecognized when we pay the obligation or when we are legally released from being the primary obligor under the liability. Net assets in liquidation represents the remaining estimated liquidation value available to shareholders upon liquidation. Due to the uncertainty in the estimated cash flows from operations and the time required to complete the Plan of Sale, actual liquidation costs and sale proceeds may differ materially from the amounts estimated. As a result of the change to the liquidation basis of accounting, the Company no longer presents a consolidated balance sheet, a consolidated statement of operations, a consolidated statement of equity or a consolidated statement of cash flows subsequent to October 31, 2024. These statements are only presented for prior year periods. Dollar amounts presented may be approximate. Share amounts are presented in whole numbers, except where noted. Use of Estimates Preparation of these financial statements in conformity with GAAP requires us to make estimates and assumptions that may affect the amounts reported in these financial statements and related notes. The Company is required to estimate all costs and revenue it expects to incur and earn through the end of liquidation. All of the estimates and evaluations are susceptible to change and actual results could differ from these estimates. New Accounting Pronouncements In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which enhances the transparency and decision usefulness of income tax disclosures. This update 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. We do not expect the adoption of ASU 2023-09 to have a material impact on our consolidated financial statements.