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Disclosure - Organization link:presentationLink link:calculationLink link:definitionLink 995465 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 995475 - Disclosure - Lease Intangible Assets and Liabilities link:presentationLink link:calculationLink link:definitionLink 995485 - Disclosure - Investments in Unconsolidated Entities link:presentationLink link:calculationLink link:definitionLink 995495 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 995505 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 995515 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 995525 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 995535 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 995545 - Disclosure - Related Party Disclosure link:presentationLink link:calculationLink link:definitionLink 995555 - Disclosure - Non-Controlling Interests link:presentationLink link:calculationLink link:definitionLink 995565 - Disclosure - Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 995575 - Disclosure - Earnings (Loss) per Share link:presentationLink link:calculationLink link:definitionLink 995585 - Disclosure - Share Based Compensation link:presentationLink link:calculationLink link:definitionLink 995595 - Disclosure - Segment Reporting link:presentationLink link:calculationLink link:definitionLink 995605 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 995615 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 995625 - Disclosure - Lease Intangible Assets and Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 995635 - Disclosure - Investments in Unconsolidated Entities (Tables) link:presentationLink link:calculationLink link:definitionLink 995645 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 995655 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 995665 - Disclosure - Shareholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 995675 - Disclosure - Earnings (Loss) per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 995685 - Disclosure - Share Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 995695 - Disclosure - Segment Reporting (Tables) link:presentationLink link:calculationLink link:definitionLink 995705 - Disclosure - Organization - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995715 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995725 - Disclosure - Summary of Significant Accounting Policies - Summary of Estimated Useful Lives (Detail) link:presentationLink link:calculationLink link:definitionLink 995735 - Disclosure - Summary of Significant Accounting Policies - Schedule of Gain on Sale of Real Estate (Detail) link:presentationLink link:calculationLink link:definitionLink 995745 - Disclosure - Lease Intangible Assets and Liabilities - Summary of Lease Intangible Assets (Detail) link:presentationLink link:calculationLink link:definitionLink 995755 - Disclosure - Lease Intangible Assets and Liabilities - Summary of Lease Intangible Liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 995765 - Disclosure - Lease Intangible Assets and Liabilities - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995775 - Disclosure - Lease Intangible Assets and Liabilities - Schedule of Future Amortization of Intangibles (Detail) link:presentationLink link:calculationLink link:definitionLink 995785 - Disclosure - Investments in Unconsolidated Entities - Summary of Company's Investments in Unconsolidated Entities (Detail) link:presentationLink link:calculationLink link:definitionLink 995795 - Disclosure - Investments in Unconsolidated Entities - Summary of Properties Contributed In Unconsolidated Entities (Detail) link:presentationLink link:calculationLink link:definitionLink 995805 - Disclosure - Investments in Unconsolidated Entities - Summary of Properties Contributed In Unconsolidated Entities (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 995815 - Disclosure - Investments in Unconsolidated Entities - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995825 - Disclosure - Investments in Unconsolidated Entities - Summary of Combined Condensed Financial Data of Unconsolidated Entities (Detail) link:presentationLink link:calculationLink link:definitionLink 995835 - Disclosure - Investments in Unconsolidated Entities - Summary of Combined Condensed Financial Data of Unconsolidated Entities (Detail) 2 link:presentationLink link:calculationLink link:definitionLink 995845 - Disclosure - Leases - Schedule of Future Minimum Rental Receipts excluding Variable Payments and Tenant Reimbursements of Expenses Under Non-cancelable Operating Leases (Detail) link:presentationLink link:calculationLink link:definitionLink 995855 - Disclosure - Leases - Components of Lease Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 995865 - Disclosure - Leases - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995875 - Disclosure - Leases - Information Related to Measurement of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 995885 - Disclosure - Leases - Summary of Revenue from Master Lease (Detail) link:presentationLink link:calculationLink link:definitionLink 995895 - Disclosure - Debt - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995905 - Disclosure - Income Taxes - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995915 - Disclosure - Fair Value Measurements - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995925 - Disclosure - Fair Value Measurements - Schedule of Assets Measured at Fair Value on Nonrecurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 995935 - Disclosure - Commitments and Contingencies - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995945 - Disclosure - Related Party Disclosure - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995955 - Disclosure - Non-controlling Interests - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995965 - Disclosure - Shareholders' Equity - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995975 - Disclosure - Shareholders' Equity - Summary of Preferred Stock Dividends and Distributions (Detail) link:presentationLink link:calculationLink link:definitionLink 995985 - Disclosure - Earnings (Loss) per Share - Reconciliation of Net Loss and Number of Common Shares Used in Computations of Basic Earnings Per Share (Detail) link:presentationLink link:calculationLink link:definitionLink 995995 - Disclosure - Earnings (Loss) Per Share - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996005 - Disclosure - Share Based Compensation - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996015 - Disclosure - Share Based Compensation - Summary of Restricted Share (Detail) link:presentationLink link:calculationLink link:definitionLink 996025 - Disclosure - Segment Reporting - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 996035 - Disclosure - Segment Reporting - Schedule Of Reconciliation Of Total Revenue to Consolidated Net Loss (Details) link:presentationLink link:calculationLink link:definitionLink Weighted-Average Grant Date Fair Value, Restricted shares vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Number of variable interest entity consolidated. Number of Variable Interest Entity Consolidated Number of VIEs consolidated Gross proceeds from sale of property Proceeds from Sale of Property, Plant, and Equipment Proceeds from Sale of Property, Plant, and Equipment, Total S 2024 Q2 Dividends. S 2024 Q2 Dividends [Member] Dividends, Preferred Stock, Total Preferred dividends declared Dividends, Preferred Stock Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Preferred Stock, Shares Issued, Total Preferred shares, issued Preferred Stock, Shares Issued Line of credit facility extended expiration date. Line Of Credit Facility Extended Expiration Date Line of credit, extended maturity date Below Market Lease, Net [Abstract] Below-Market Leases [Abstract] Plan Name Plan Name [Axis] Equity [Abstract] Entity Current Reporting Status Entity Current Reporting Status Number Of Consolidated Properties Acquired Number of consolidated properties acquired. Number of consolidated properties acquired EXPENSES Operating Expenses [Abstract] Unconsolidated entities excluding UTC JV. Unconsolidated Entities Excluding UTC JV [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Common shares, authorized Common Stock, Shares Authorized Invesco Real Estate [Member] Invesco Real Estate [Member] Invesco Real Estate. Finite-Lived Intangible Asset, Expected Amortization, Year Four 2030 S 2024 Q1 Dividends. S 2024 Q1 Dividends [Member] Product and Service [Axis] Document Fiscal Period Focus Document Fiscal Period Focus Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Debt instrument, base annual interest rate Debt Instrument, Interest Rate, Stated Percentage Base annual interest rate Real Estate Insurance Expenses Net Real Estate Insurance Expenses Net. Property insurance Entity Shell Company Entity Shell Company Default interest rate on overdue amounts excess of base interest rate Default Interest Rate On Overdue Amounts Excess Of Base Interest Rate Default interest rate on overdue amounts excess of base interest rate. Organization And Basis Of Presentation [Table] Organization And Basis Of Presentation [Table] Organization And Basis Of Presentation [Table] Segment Reporting, Policy [Policy Text Block] Segment Reporting Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Cash and Cash Equivalent Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Tenant Improvements [Member] Tenant Improvements [Member] Tenant Improvements [Member] Property Subject to or Available for Operating Lease [Line Items] Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items] Number of acres held under development. Number of Acres Held Under Development Number of acres held under development OP Unit exchanges, shares Stock Issued During Period, Shares, Conversion of Units OP Units issued and exchanged, shares Common Stock, Shares, Issued, Total Common shares, issued Common Stock, Shares, Issued Asset Class [Domain] Expected cash payments on operating leases, thereafter Lessee Operating Lease Liability Payments Due After Year Four Lessee operating lease liability payments due after year four. Statement [Table] Statement [Table] Other-than-temporary Impaired Investments in Unconsolidated Entities [Member] Other-than-temporary Impaired Investments in Unconsolidated Entities [Member] Other-than-temporary impaired investments in unconsolidated entities. Other Liability, Related Party [Extensible Enumeration] Minority Interest [Table] Noncontrolling Interest [Table] Fair value inputs capitalization rate. Fair Value Inputs Capitalization Rate Fair value inputs capitalization rate Statement [Line Items] Statement [Line Items] Summary of Finite Lived Intangible Assets and Liabilities [Table Text Block] Summary of Finite Lived Intangible Assets and Liabilities. Summary of Finite Lived Intangible Assets and Liabilities Business Acquisition, Acquiree Business Combination [Domain] Entity Filer Category Entity Filer Category Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Percentage of Operating Partnership Payment on Extension Fee Percentage of operating partnership payment on extension fee. Percentage of operating partnership payment on extension fee Unamortized Extension Fee Amount Unamortized extension fee amount. Unamortized extension fee Liabilities and Equity Total liabilities and equity Debt Instrument [Line Items] Debt Instrument [Line Items] Final contribution value Contribution value Investments In And Advance To Affiliates Subsidiaries Associates And Joint Ventures After Revaluation Investments in and advance to affiliates, subsidiaries, associates, and joint ventures after revaluation. Long-Lived Tangible Asset Long-Lived Tangible Asset [Axis] PENNSYLVANIA Investment Building and Building Improvements, Total Buildings and improvements Investment Building and Building Improvements Contribution Value Real Estate Investments Entity Real estate investments entity. Deferred Tax Assets, Valuation Allowance, Total Deferred Tax Assets, Valuation Allowance Valuation allowance Valuation allowance Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent U.S. statutory rate Preferred shares public offering price per share Shares Issued, Price Per Share Effective federal tax rate Effective Income Tax Rate Reconciliation, Percent Total Tax, Percent Geographical [Domain] Geographical Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Rental revenue recognition and tenant receivables. Rental Revenue Recognition And Tenant Receivables Policy [Text Block] Rental Revenue Recognition and Tenant Receivables Repaid by preferred distributions from the joint venture Unconsolidated Entities Loan Oustanding Unconsolidated entities loan oustanding Landmark land holdings, LLC. Landmark Land Holdings, LLC [Member] Landmark Land Holdings, LLC [Member] Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Additional paid-in capital Additional Paid in Capital, Common Stock Advance To Unconsolidated Entities Advance to unconsolidated entities. Advance to unconsolidated entities Noncontrolling Interest [Abstract] Debt Instrument, Interest Rate During Period Collateral interest rate Impairment investments recorded to equity in loss of unconsolidated entities Impairment Investments in Unconsolidated Entities Impairment investments in unconsolidated entities. Impairment investments in unconsolidated entities Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Mark 302 JV [Member] Mark Three Hundred Two Joint Venture Limited Liability Company [Member] Mark 302 JV LLC. Unusual or Infrequent Item, or Both Unusual or Infrequent Item, or Both [Domain] Impaired real estate assets. Impaired Real Estate Assets [Member] Impaired Real Estate Assets [Member] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Reconciliation of Net Loss and Number of Common Shares Used in Computations of Basic Earnings Per Share Initial lease end date. Initial Lease End Date Initial lease end date Increase (Decrease) in Other Receivables Tenants and other receivables Tenant and other receivables Investment, Name Investment, Name [Axis] Liabilities Related To Real Estate Held For Sale Liabilities related to real estate held for sale Liabilities related to real estate held for sale. Earnings Per Share, Basic, Total Earnings Per Share, Basic Net income/(loss) per share attributable to Seritage Class A common shareholders - Basic Net loss per share attributable to Seritage Class A common shareholders - Basic Percentage of Occupancy Threshold To Exercise Put Rights Percentage of occupancy threshold to exercise put rights. Percentage of occupancy threshold to exercise put rights Real estate investments expense. Real Estate Investments Expense Real estate investments expense costs previously capitalized Gross proceeds Proceeds From Sale Of Real Estate Discontinued Operations The cash inflow from the sale of real estate from discontinued operations. Repayments of Secured Debt Repayment of term loan Revolving Credit Facility [Member] Operating Lease, Lease Income Total rental revenues Impairment of Leasehold Impairment Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Lessee, Operating Lease, Liability, to be Paid, Year Five Expected cash payments on operating leases in 2031 S 2023 Q3 Dividends. S 2023 Q3 Dividends [Member] Dividends Payable Date Of Record Day Month And Year Dividends Payable, Date of Record Record Date Consolidation Items [Domain] Shareholders' Equity Equity, Attributable to Parent [Abstract] Entity Small Business Entity Small Business Brookfield Properties Retail II [Member] Brookfield Properties Retail Two [Member] Brookfield Properties Retail Two. Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Accumulated deficit Retained Earnings (Accumulated Deficit) Retained earnings (accumulated deficit) Revenue performance obligation satisfied over time method used description Revenue, Performance Obligation Satisfied over Time, Method Used, Description Restricted Stock, Value, Shares Issued Net of Tax Withholdings Restricted stock withholdings Restricted stock withholdings Preferred Stock [Member] Net proceeds from public offering Proceeds from Issuance Initial Public Offering Tenant One [Member] Tenant One Tenant One Schedule of Gain on Sale of Real Estate Schedule Of Gain Losses On Sale Of Real Estate Table [Text Block] Tabular disclosure of gain (loss) on real estate properties and units in those properties that are included in the discussion of the nature of an entity's operations. Earning Per Share [Line Items] Earning Per Share [Line Items] Earning Per Share [Line Items] Share Based Compensation Share-Based Payment Arrangement [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Interest and other income (expense), net. Interest and Other Income (Expense), Net [Member] Leases [Abstract] Class A Common Shares [Member] Common Class A [Member] Amendment Flag Amendment Flag Impairment of real estate assets Impairment of real estate assets Impairment of Real Estate Impairment of real estate assets Santa Monica, CA [Member] Santa Monica C A [Member] Santa Monica, CA. Product and Service [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Earnings Per Share, Policy [Policy Text Block] Earnings (Loss) per Share LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Net cash provided by (used in) operating activities Net cash (used in) provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash used in operating activities Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description Common Stock [Member] Common Stock [Member] Lessee, Operating Lease, Liability, to be Paid, Year Three Expected cash payments on operating leases in 2029 Escrow Deposit Cash collateral held in restricted account with lender Additional impairment on sale of properties. Additional Impairment on Sale of Properties Additional impairment on sale of properties Entity Address, Address Line One Entity Address, Address Line One Cost, Depreciation, Amortization and Depletion, Total Depreciation and amortization Cost, Depreciation, Amortization and Depletion Dividends Payable [Table] Dividends Payable [Table] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Earnings Per Share [Abstract] Income Tax, Policy [Policy Text Block] Income Taxes SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Loss Contingency [Abstract] ROU assets Operating Lease, Right-of-Use Asset S 2025 Q3 Dividends [Member] S 2025 Q3 dividends. Mortgage loans payable, net Mortgage Loans Payable Net Mortgage loans payable, net. Chief Financial Officer [Member] Chief Financial Officer [Member] Impairment resulting from monetization of assets Impairment Resulting From Monetization Of Assets Impairment resulting from monetization of assets. Land Land Document Type Document Type S 2026 Q1 Dividends [Member] S 2026 Q1 Dividends. Income Taxes Paid, Net, Total Income taxes paid Income Taxes Paid, Net Operating loss Gross Profit Operating income (loss) Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Percentage of operating partnership interest held by parent Subsidiary, Ownership Percentage, Parent Net investment in real estate Real Estate Investment Property, Net Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Entity Central Index Key Entity Central Index Key Reduction in initial lease term. Reduction in Initial Lease Term Reduction in initial lease term Voting and support agreement. Voting and Support Agreement [Member] Voting and Support Agreement [Member] Valuation Approach and Technique [Axis] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net increase (decrease) in cash and cash equivalents, and restricted cash Subsequent Event Type Subsequent Event Type [Domain] LIABILITIES AND MEMBERS' INTERESTS Liabilities And Members Interests [Abstract] Liabilities and members interests. Class B Non-Economic Common Shares [Member] Class B Non Economic Common Shares [Member] Class B Non Economic Common Shares [Member] Common shares, par value Common Stock, Par or Stated Value Per Share Cockeysville JV [Member] Cockeysville J V [Member] Cockeysville JV. Real Estate Investment Trust [Member] Real Estate Investment Trust [Member] Real estate investment trust. Liabilities Liabilities [Abstract] Gain (Loss) on Termination of Lease Termination of lease Debt Disclosure [Abstract] Number of tenant. Number of Tenant Number of tenant Ownership Ownership [Domain] Maximum leverage ratio Line Of Credit Facility Leverage Ratio Line of credit facility leverage ratio. Current Fiscal Year End Date Current Fiscal Year End Date Debt Instrument [Table] Schedule of Long-Term Debt Instruments [Table] Payments to Noncontrolling Interests Distributions to non-controlling member of consolidated variable interest entities Document Quarterly Report Document Quarterly Report Restricted Cash and Cash Equivalents Restricted Cash and Cash Equivalents [Axis] Entity Address, State or Province Entity Address, State or Province Non-vested restricted shares outstanding Unvested restricted shares at beginning of period Unvested restricted shares at end of period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Line of Credit Facility, Remaining Borrowing Capacity Remaining unfunded amount Investment, Name Investment, Name [Domain] Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding, Beginning Balance Preferred shares, outstanding Preferred Stock, Shares Outstanding Common Stock, Capital Shares Reserved for Future Issuance Number of shares of common stock reserved for issuance Geographical [Axis] Geographical Line of Credit Facility, Lender Line of Credit Facility, Lender [Domain] Number of entities acquired Number Of Entities Acquired Number of entities acquired. S 2024 Q4 Dividends. S 2024 Q4 Dividends [Member] Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity Attributable to Noncontrolling Interest, Total Non-controlling interests Equity, Attributable to Noncontrolling Interest Series A Cumulative Redeemable Preferred Shares [Member] Series A Cumulative Redeemable Preferred Shares [Member] Series A cumulative redeemable preferred shares. Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Preferred shares redemption price per share plus any accrued and unpaid dividends Preferred Stock, Redemption Price Per Share Net loss per share attributable to Class A common shareholders - Basic Income (Loss) from Continuing Operations, Per Outstanding Share, Total Earnings (loss) per share attributable to Class A common shareholders - Basic Loss per share attributable to Class A common shareholders - Basic Subsequent Event [Member] Subsequent Event [Member] Subsequent Event Equity Method Investment, Nonconsolidated Investee Equity Method Investment, Nonconsolidated Investee [Domain] Construction in progress Development In Process1 The current amount of expenditures for a real estate project that has not yet been completed. Type of Revenue [Extensible List] Revenue, Product and Service [Extensible Enumeration] Number of Properties Number Of Entities Properties Number of entities properties Related Party Transaction Related Party Transaction [Axis] Customer [Domain] Finite-Lived Intangible Assets, Major Class Name Finite-Lived Intangible Assets, Major Class Name [Domain] Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Cash and Cash Equivalents Cash and Cash Equivalents [Domain] Business Combination, Consideration Transferred, Total Business acquisition fair value, purchase price Business Combination, Consideration Transferred Lease Intangible Assets and Liabilities Real Estate Disclosure [Text Block] Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Preferred shares Preferred Stock, Value, Issued Property Operating Expense Property Operating Expense [Member] Property operating expense. Number of properties interested in the portfolio Number Of Properties Interested Number of properties interested. Minimum [Member] Minimum [Member] Weighted-Average Grant Date Fair Value, Share units granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Summary of Lease Intangible Liabilities Schedule Of Below Market Leases Table [Text Block] Tabular disclosure of below market leases. Accumulated Amortization Below Market Lease Liability Accumulated Amortization Below market lease liability accumulated amortization. Summary of Company's Investments in Unconsolidated Entities Equity Method Investments [Table Text Block] Earning Per Share [Table] Earning Per Share [Table] Earning Per Share [Table] Investment in real estate Real Estate Investments, Net [Abstract] Payment of Monthly fee and reimburesement expense. Payment Of Monthly Fee and Reimburesement Expense Payment of monthly fee and reimburesement expense Amortization of Intangible Assets, Total Amortization expense of intangible assets Amortization of Intangible Assets Class B Common Shares [Member] Common Class B [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Nonrecurring [Member] Non-recurring Basis [Member] Increase (reduction) to rental income Increase Decrease In Rental Revenue (Increase) decrease in rental revenue. Reduction of rental income Segment Reporting [Abstract] Preferred Stock, Dividends Per Share, Declared Preferred dividends declared, per share Preferred Share Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Exercise Price And Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options Outstanding, Weighted Average Exercise Price, and Additional Disclosures [Abstract] Loan and Security Agreement Loan and Security Agreement [Member] Loan and security agreement member. Mark 302 JV, UTC JV and Tech Ridge JV [Member] Mark 302 JV, UTC JV and Tech Ridge JV [Member] Mark 302 JV, UTC JV and Tech Ridge JV. Related Party Transactions [Abstract] Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Schedule of Future Minimum Rental Receipts excluding Variable Payments and Tenant Reimbursements of Expenses Under Non-cancelable Operating Leases Lessee, Operating Lease, Renewal Term Operating lease extend term Restricted cash at end of period Restricted Cash and Cash Equivalents, Total Restricted cash Restricted Cash and Cash Equivalent Restricted cash at beginning of period Weighted-Average Grant Date Fair Value, Restricted shares forefeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Weighted Average Grant Date Fair Value Share based compensation arrangement by share based payment award equity instruments other than options forfeited in period weighted average grant date fair value Commitments and Contingencies Commitments and Contingencies (Note 9) Number of joint venture acquired Number Of Joint Ventures Acquired Number of joint ventures acquired. S 2023 Q4 Dividends. S 2023 Q4 Dividends [Member] Weighted-Average Grant Date Fair Value, Unvested restricted shares at beginning of period Weighted-Average Grant Date Fair Value, Unvested restricted shares at end of period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Operating Partnership Payment on Extension Fee Operating Partnership Payment on Extension Fee. Operating partnership payment on extension fee General and Administrative Expenses [Member] General and Administrative Expense [Member] Operating Lease, Liability, Total Operating Lease, Liability Outstanding lease liabilities Allowance for Deferral Agreements. Allowance for Deferral Agreements [Member] Unconsolidated Entities [Member] Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Annual spread rate Debt Instrument, Basis Spread on Variable Rate Annual interest rate Percentage of preferred dividend rate Preferred Stock, Dividend Rate, Percentage Dividends Payable [Line Items] Dividends Payable [Line Items] Scenario Forecast [Member] Forecast [Member] Leases Leases Of Lessor And Lessee Disclosure [Text Block] The entire disclosure for lessee and lessor entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing. S 2023 Q2 Dividends. S 2023 Q2 Dividends [Member] Variable Interest Entities Variable Interest Entity, Primary Beneficiary [Member] Proceeds from Legal Settlements Gross proceeds from litigation settlement Accounts Payable and Accrued Liabilities, Noncurrent Accounts Payable and Accrued Liabilities, Noncurrent Accounts Payable and Accrued Liabilities, Noncurrent, Total Capital Expenditures Incurred but Not yet Paid Accounts payable related to development of real estate Investment in unconsolidated entities Payments to Acquire Equity Method Investments Net (loss) Net loss Net income / (loss) Net loss Schedule Of Basic And Diluted Net Income Loss Per Share [Table] Schedule Of Basic And Diluted Net Income Loss Per Share [Table] Schedule Of Basic And Diluted Net Income Loss Per Share [Table] Original And Holdco Master Lease [Member] Original and holdco master lease. Original and Holdco Master Lease [Member] Real Estate Held for Sale Real Estate Held for Development and Sale, Policy [Policy Text Block] In-Place Leases, Net [Member] Leases, Acquired-in-Place [Member] In-Place Leases [Member] Real Estate, Policy [Policy Text Block] Real Estate Geographic Distribution [Axis] Long-term Debt, Type Long-Term Debt, Type [Domain] Simon JV [Member] SPS Portfolio Holdings II LLC [Member] SPS Portfolio Holdings II LLC. Loss Contingencies [Table] Loss Contingencies [Table] Weighted average Class A common shares outstanding Weighted Average Number of Shares Outstanding, Basic, Total Weighted average common shares outstanding Weighted average Class A common shares outstanding - Basic Debt instrument extended maturity term. Debt Instrument Extended Maturity Term Debt instrument extended maturity term Scenario [Axis] Scenario Liability. Liability Liabilities Document Information [Line Items] Document Information [Line Items] Negotiating Sales [Member] Negotiating Sales Member Negotiating sales. Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year Remainder of 2026 Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Long-Lived Tangible Asset Long-Lived Tangible Asset [Domain] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] S 2026 Q3 Dividends [Member] S 2026 Q3 Dividends. Related Party Disclosure Related Party Transactions Disclosure [Text Block] Cash, Ending Balance Cash, Beginning Balance Available cash Cash Number of properties subject to corporate office lease Number Of Properties Subject To Corporate Office Leases Number of properties subject to corporate office leases. APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Variable Rate [Domain] Vesting of restricted share units Vesting Of Restricted Stock Units Value Vesting of restricted stock units value. Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Deferred tax assets valuation allowance Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total shareholders' equity Equity, Attributable to Parent Preferred shares, par value Preferred Stock, Par or Stated Value Per Share Summary of Combined Condensed Financial Data of Unconsolidated Entities Schedule of Investments in and Advances to Affiliates, Schedule of Investments [Table Text Block] Number of properties with put rights. Number of Properties with Put Rights Put rights for number of assets Put rights for number of properties Statement of Stockholders' Equity [Abstract] Real estate taxes Real Estate Tax Expense Real estate taxes Gain Loss On Sale Of Real Estate Net Gain (loss) on sale of real estate, net. Loss on disposition of real estate Gain on sale of real estate Operating leases expiration year Operating Leases Expiration Year Operating Leases Expiration Year Impairment of investments in unconsolidated entities Impairment loss Impairment Of Unconsolidated Joint Venture Impairment of unconsolidated joint venture. Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Remainder of 2026 Valuation Approach and Technique [Domain] Series A Preferred Stock [Member] Series A Preferred Shares [Member] Deferred Payment Obligation Interest Payment Deferred payment obligation, interest payment. Deferred interest Use of Estimates Use of Estimates, Policy [Policy Text Block] Number Of Real Estate Properties Acquisition Exercised Number of real estate properties acquisition exercised. Number of real estate properties acquisition exercised Schedule Of Equity Method Investments [Table] Equity Method Investment [Table] S 2026 Q2 Dividends [Member] S 2026 Q2 Dividends [Member] Interests in joint ventures acquired Joint Venture Interest In Acquired Business Joint venture interest in acquired business. Entity Address, Address Line Two Entity Address, Address Line Two Fair Value Measurements Fair Value Disclosures [Text Block] Dividends Payable Date Declared Day And Month Dividends Payable, Date Declared Declaration Date Equity method investments in uncosolidated entities. Equity Method Investments in Uncosolidated Entities Carrying value of Company's investments in unconsolidated entities Non-Controlling Interest [Member] Noncontrolling Interest [Member] Debt Instrument, Name Debt Instrument, Name [Domain] SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES Noncash Investing and Financing Items [Abstract] Income (Loss) from Equity Method Investments, Total Income (Loss) from Equity Method Investments Equity in (loss) income of unconsolidated entities Equity in loss of unconsolidated entities Equity in income (loss) of unconsolidated entities Prepaid expenses, deferred expenses and other assets, net Prepaid Expense and Other Assets Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Segment Reporting, Other Segment Item, Amount Other segment items Other segment items Plan Name Plan Name [Domain] Sale Leaseback Transaction Base Rent Amount Sale Leaseback Transaction Base Rent Amount Sale leaseback base rent Below Market Lease Liability Net Below market lease liability net. Balance Below-market lease liabilities, net Interest and other income (expense), net Interest and other income (expense), net Interest Expense, Total Interest expense Interest Expense, Operating and Nonoperating Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Tenant and Other Receivables Receivable [Policy Text Block] Entity Entity [Domain] Unconsolidated Entities Ventures [Member] Unconsolidated Entities Ventures [Member] Unconsolidated entities ventures. Credit Facility [Axis] Seritage % Ownership Equity Method Investment, Ownership Percentage Lessor, Operating Lease, Payment to be Received, Year Two 2028 Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Restricted stock withholdings, shares Restricted stock withholdings, shares Related Party Related and Nonrelated Parties [Axis] Gain (Loss) Entity Capital Gain Losses Net Entity capital gain losses net. Area of real estate property (in square feet) Area of Real Estate Property Entity Address, City or Town Entity Address, City or Town Number of Reportable Segments Number of reportable segments Security Exchange Name Security Exchange Name Credit Facility [Domain] Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Contract for sale customary due diligence. Contract for Sale Customary Due Diligence [Member] Contract for Sale Customer Due Diligence [Member] Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income earned from servicing activities. Income Earned From Servicing Activities Income earned from servicing activities Distributions from unconsolidated entities Proceeds from Equity Method Investment, Distribution, Return of Capital Gain (Loss) on Revaluation for Unconsolidated Entities Gain (loss) on revaluation for unconsolidated entities. Gain (loss) recognized on revaluation Preferred shares redemption threshold period Preferred Shares Threshold Period Preferred shares threshold period. Real Estate [Abstract] Accounts Payable and Accrued Liabilities, Total Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities Cash payments for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statistical Measurement Statistical Measurement [Domain] Compensation expense recognized Share-Based Payment Arrangement, Expense Document Period End Date Document Period End Date Equity Method Investments and Joint Ventures [Abstract] Title and Position [Axis] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Property operating Cost of Property Repairs and Maintenance Statement of Financial Position [Abstract] Variable rental income Operating Lease, Variable Lease Income Tech Ridge JV [Member] Tech Ridge J V [Member] Tech Ridge JV [Member] RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Class of Stock Class of Stock [Axis] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies [Line Items] Receivables from unconsolidated entities for reimbursable costs Other Receivables Real Estate Liabilities Associated with Assets Held for Development and Sale, Total Real estate held for sale, liabilities Real Estate Liabilities Associated with Assets Held for Development and Sale Abandoned project costs. Abandoned Project Costs [Member] Total liabilities Liabilities shorter of the estimated useful life or non-cancelable term of lease Unconsolidated Entities. Unconsolidated Entities [Member] Unconsolidated Entities [Member] Schedule Of Operating Leases Future Minimum Payments Receivable [Line Items] Schedule Of Operating Leases Future Minimum Payments Receivable [Line Items] Schedule Of Operating Leases Future Minimum Payments Receivable [Line Items] Unencumbered Fixed Charge Coverage Ratio To Each Fiscal Quarter After Three Years Unencumbered fixed charge coverage ratio to each fiscal quarter for after three years. Unencumbered fixed charge coverage ratio to each fiscal quarter after December 31, 2023 Operating Lease, Lease Income, Lease Payments Fixed rental revenues Real Estate Properties Real Estate Properties [Domain] Minimum percentage of outstanding common stock required for affirmative vote to approve plan of sale. Minimum Percentage Of Outstanding Common Stock Required For Affirmative Vote To Approve Plan Of Sale Minimum percentage of outstanding common stock required for affirmative vote to approve plan of sale Lessee, Operating Lease, Liability, to be Paid, Year Two Expected cash payments on operating leases in 2028 Vesting of restricted share units, shares Vesting Of Restricted Stock Units Shares Vesting of restricted stock units shares. Vesting of restricted share units, shares Restricted Share [Member] Restricted Stock [Member] Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability Non cash deferred tax benefit due to revocation of REIT status Variable Rate [Axis] COVID-19 Pandemic [Member] Covid19 Pandemic [Member] Covid19 Pandemic [Member] Finite-Lived Intangible Assets, Gross, Total Gross Asset Finite-Lived Intangible Assets, Gross Amortization Of Below Market Lease Additional Property Expense Amortization Of Below Market Lease Additional Property Expense Additional property expense Weighted average Class A common shares outstanding - Diluted Weighted average Class A common shares outstanding - Diluted Weighted Average Number of Shares Outstanding, Diluted Entity File Number Securities Act File Number Cover [Abstract] Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Accounts payable, accrued expenses and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Restricted shares forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Schedule Of Other Related Party Transactions [Table] Schedule Of Other Related Party Transactions [Table] Schedule of Other Related Party Transactions [Table] Property operating expenses Cost of Other Property Operating Expense Distribution of taxable income to qualify as REIT, percent Distribution Of Taxable Income To Qualify As Reit Distribution of taxable income to qualify as REIT. Net Proceeds from Sale of Interests in Unconsolidated Entities Net proceeds from sale of interests in unconsolidated entities. Net proceeds from sale of interests in unconsolidated entities Seritage Growth Properties 2015 Share Plan [Member] Seritage Growth Properties2015 Share Plan [Member] Seritage Growth Properties 2015 Share Plan. Scenario Scenario [Domain] Number of Operating Segments Number of operating segments Segment Reporting Disclosure [Text Block] Segment Reporting General and Administrative Expense, Total General and administrative General and Administrative Expense Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Percentage of revenue earned from unconsolidated joint ventures Percentage Of Revenue Earned From Unconsolidated Joint Ventures Percentage of revenue earned from unconsolidated joint ventures. Summary of Restricted Share Nonvested Restricted Stock Shares Activity [Table Text Block] Finite-Lived Intangible Assets, Net, Ending Balance Finite-Lived Intangible Assets, Net, Beginning Balance Balance Lease intangible assets, net Finite-Lived Intangible Assets, Net Berkshire Hathaway [Member] Berkshire Hathaway Life Insurance Company [Member] Berkshire Hathaway Life Insurance Company. Equity Method Investment, Realized Gain (Loss) on Disposal Loss on sale of interests in unconsolidated entities Loss on sale of interests in unconsolidated entities Operating Lease, Expense Rent expense Number of real estate properties Number of properties classified Number of Real Estate Properties The Howard Hughes Corporation and Foulger-Pratt [Member] The Howard Hughes Corporation and Foulger-Pratt. Estimated useful lives Property, Plant and Equipment, Useful Life Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Ownership Ownership [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Vesting period Equity In Loss Of Unconsolidated Entities Equity in loss of unconsolidated entities Equity in income (loss) of unconsolidated entities Equity in loss of unconsolidated entities Loss on Impairment [Member] Loss On Impairment Loss On Impairment [Member] Loss on impairment. Wholly Owned Properties [Member] Wholly Owned Properties [Member] Unrecognized compensation costs Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Other Receivables, Net, Current, Total Tenant and other receivables, net Other Receivables, Net, Current Common shares, outstanding Beginning balance, shares Ending balance, shares Common Stock, Shares, Outstanding Dividends [Domain] Document Transition Report Document Transition Report Asset Impairment Charges Asset Impairment Charges, Total Cash flow discounted rate [Member] Valuation Technique, Discounted Cash Flow [Member] S 2025 Q2 Dividends [Member] S 2025 Q2 Dividends. S 2025 Q2 Dividends [Member] Statement of Cash Flows [Abstract] Amortization of below-market leases, net of above-market leases Amortization Of Acquired Below Market Lease Net Of Acquired Above Market Lease Amortization of acquired below market lease net of acquired above market lease. Preferred shares, liquidation preference Preferred Stock, Liquidation Preference, Value Equity Method Investment, Summarized Financial Information [Abstract] Fixed Charge Coverage Ratio To Each Fiscal Quarter After Three Years Fixed charge coverage ratio to each fiscal quarter after three years. Fixed charge coverage ratio for each fiscal quarter after December 31, 2023 Shareholders' Equity Equity [Text Block] Term loan facility. Term Loan Facility [Member] Term Loan Facility [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Earnings (Loss) per Share Earnings Per Share [Text Block] Unencumbered fixed charge coverage ratio Unencumbered Fixed Charge Coverage Ratio Unencumbered fixed charge coverage ratio. Debt Instrument Interest Rate Outstanding Balance Debt instrument interest rate outstanding balance. Debt instrument outstanding balance Partner Type of Partners' Capital Account, Name [Domain] Other assets, net Other Intangible Assets, Net Unrestricted Cash [Member] Unrestricted cash. Unrestricted cash [Member] Distributions from consolidated VIEs Distributions from Consolidated Variable Interest Entity Distributions from consolidated variable interest entity. Office space cost Operating Lease, Cost Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] S 2024 Q3 Dividends. S 2024 Q3 Dividends [Member] Litigation settlement payment Litigation Settlement, Amount Awarded to Other Party Cash paid for operating leases (in thousands) Operating Lease, Payments ASSETS Assets [Abstract] Partner Type [Axis] Increase (Decrease) in Prepaid Expense and Other Assets, Total Prepaid expenses, deferred expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses, deferred expenses and other assets Repayments of principal balance Repayments of Debt Repayments of debt Document Fiscal Year Focus Document Fiscal Year Focus Real Estate Investment Property Accumulated Depreciation, Total Accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Contributions to consolidated VIEs Contributions To Consolidated Variable Interest Entity Contributions to consolidated variable interest entity. CASH FLOW FROM INVESTING ACTIVITIES Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Total GLA Land Subject to Ground Leases Preferred dividends paid Payments of Ordinary Dividends, Preferred Stock and Preference Stock Lessor, Operating Lease, Payment to be Received, Year One 2027 Geographic Distribution [Domain] Lessor Disclosure [Abstract] Property, Plant, and Equipment, Lessor Asset under Operating Lease [Abstract] Finite-Lived Intangible Asset, Expected Amortization, Year One 2027 Abandoned project costs Abandoned project costs Abandoned project costs Abandoned project costs Debt instrument principal reduction amount by maturity date. Debt Instrument Principal Reduction Amount by Maturity Date Principal reduction amount by maturity date Principal reduced by maturity date Other Liabilities Payables to unconsolidated entities Other Liabilities, Total Assets Held-for-sale, Not Part of Disposal Group, Total Real estate held for sale, assets Real estate held for sale Asset, Held-for-Sale, Not Part of Disposal Group Fair Value Disclosures [Abstract] Commitments and Contingencies Disclosure [Abstract] ESL [Member] Beneficial Owner [Member] Lessee, Operating Lease, Liability, to be Paid, Year One Expected cash payments on operating leases in 2027 Real Estate Property Ownership Real Estate Property Ownership [Axis] Aventura, FL [Member] FLORIDA Joint Venture Partners One [Member] Joint venture partners one. Net Income (Loss) Available to Common Stockholders, Basic Net income/(loss) attributable to Seritage common shareholders Net loss attributable to Seritage common shareholders Net loss attributable to common shareholders - Basic Long-term Line of Credit, Total Principal amount outstanding Long-Term Line of Credit Debt Instrument Debt Instrument [Axis] Lessee, Operating Lease, Liability, to be Paid, after Year Five Expected cash payments on operating leases, thereafter Income Statement Equity Method Investments [Line Items] Income Statement Equity Method Investments [Line Items] Income statement equity method investments. Share-Based Payment Arrangement [Abstract] Assets, Fair Value Disclosure, Total Assets, Fair Value Disclosure Assets measured at fair value Investment in real estate SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract] Debt Instrument, Fair Value Disclosure, Total Debt obligations, fair value Debt Instrument, Fair Value Disclosure Investments in Unconsolidated Entities Equity Method Investments and Joint Ventures Disclosure [Text Block] Revenues Revenues Total revenue Total revenue Net cash provided by investing activities Net cash (used in) provided by investing activities Net cash (used in) provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Gain (loss) on sale of real estate, net Gain (Loss) on Disposition of Real Estate, Discontinued Operations Gain on sale of real estate Title of 12(b) Security Title of 12(b) Security Schedule of Segment Reporting Information, by Segment [Table] Brookfield Properties Retail I [Member] Brookfield Properties Retail One [Member] Brookfield Properties Retail One. Contribution Date Investment In Entity Revaluation Date Investment in entity revaluation date. Income Statement Equity Method Investments [Table] Income Statement Equity Method Investments [Table] Income Statement Equity Method Investments [Table] Related Party Related and Nonrelated Parties [Domain] Income Taxes Income Tax Disclosure [Text Block] Non Cash Lease Expenses Non-cash lease expenses. Non-cash lease expense Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Expected cash payments on operating leases for the remainder of 2026 Total Lessor, Operating Lease, Payment to be Received Document Information [Table] Document Information [Table] Consolidated Entities [Axis] Invesco Real Estate II [Member] Invesco Real Estate Two [Member] Invesco Real Estate Two. Legal Entity Legal Entity [Axis] Change in operating assets and liabilities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Preferred dividends declared and unpaid Preferred Dividends Declared And Unpaid Preferred dividends declared and unpaid. Summary of Estimated Useful Lives Property, Plant and Equipment [Table Text Block] Income Tax Disclosure [Abstract] Fair Value, Recurring and Nonrecurring [Table] Below Market Lease Gross Liability Below market lease gross liability. Gross Liability Unconsolidated Properties [Member] Unconsolidated Property [Member] Unconsolidated Property. Lessor, Operating Lease, Payment to be Received, Year Four 2030 Additional Paid-In Capital [Member] Additional Paid-in Capital [Member] Measurement Frequency [Domain] Number of properties subject to ground lease Number of Properties Subject to Ground Leases Income Statement Location Statement of Income Location, Balance [Axis] Trading Symbol Trading Symbol Schedule Of Finite Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Schedule Of Related Party Transactions By Related Party [Table] Related Party Transaction [Table] Subsequent Event Type Subsequent Event Type [Axis] Lessor, Operating Lease, Payment to be Received, Year Five 2031 Reduction of rental income Reduction of rental income Schedule of Other Related Party Transactions [Line Items] Schedule Of Other Related Party Transactions [Line Items] Schedule of Other Related Party Transactions [Line Items] Summary of Lease Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Extension period Debt Instrument Extension Period Debt instrument extension period. CASH FLOW FROM FINANCING ACTIVITIES Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] S 2025 Q4 Dividends [Member] S 2025 Q4 dividends. Initial Funding [Member] Initial Funding [Member] Initial funding. Schedule Of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Non-Controlling Interests Noncontrolling Interest Disclosure [Text Block] Management and Related Fees Income [Member] Management Service [Member] Management and Other Fee Income [Member] Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value discount Holdco Master Lease [Member] Holdco Master Lease [Member] Holdco master lease. Tenant Two Tenant Two Tenant Two [Member] Sale leaseback transaction interest rate. Sale Leaseback Transaction Interest Rate Sale leaseback Interest rate Investment in unconsolidated entities Real Estate Investments, Unconsolidated Real Estate and Other Joint Ventures Information Related to Measurement of Lease Liabilities Schedule Of Information Related To Measurement Of Lease Liabilities Table [Text Block] Schedule of information related to measurement of lease liabilities. Equity Components Equity Components [Axis] Payment to terminate lease. Payment to Terminate Lease Payment to terminate lease Equity Component Equity Component [Domain] Asset Class [Axis] Goodwill and Intangible Assets Disclosure [Abstract] Contributions from non-controlling member of consolidated variable interest entities Proceeds from Noncontrolling Interests Date of senior secured term loan agreement. Date of senior secured term loan agreement Date Of Senior Secured Term Loan Agreement Investments Investments, Total Business Acquisition Business Combination [Axis] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Lease Income, Total Lease Income Rental income Customer [Axis] Depreciation, Depletion and Amortization, Nonproduction, Total Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Building and Building Improvements [Member] Investments in Unconsolidated Joint Ventures Investment In Unconsolidated Joint Ventures Policy [Text Block] Investment in unconsolidated joint ventures policy. Property development expenditures receivable Tenant and other receivables, net Accounts and Other Receivables, Net, Current Equity Method Investment, Nonconsolidated Investee Equity Method Investment, Nonconsolidated Investee [Axis] Impairment Equity Method Investment, Other-than-Temporary Impairment Maximum [Member] Maximum [Member] Dividend Payable Date To Be Paid Day Month And Year Dividends Payable, Date to be Paid Payment Date Real Estate Insurance Property insurance Property insurance Statistical Measurement Statistical Measurement [Axis] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Lease intangible assets Organization And Basis Of Presentation [Line Items] Organization And Basis Of Presentation [Line Items] Organization And Basis Of Presentation [Line Items] Sales-leaseback financing obligations Sale Leaseback Financing Obligations Sales-leaseback financing obligations. Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Total Common shares Common Stock, Value, Issued Number of states in properties located Number of States in which Entity Operates Net Income (Loss) Available to Common Stockholders, Diluted Net loss attributable to common shareholders - Diluted Line of credit, maturity date Line of Credit Facility, Expiration Date Dividends [Axis] Common Area Maintenance Common area maintenance. Common area maintenance Common area maintenance Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Secured Overnight Financing Rate (SOFR) [Member] Income Tax Contingency [Table] Income Tax Contingency [Table] Thereafter Lessor, Operating Lease, Payment to be Received, after Year Five Preferred dividends Preferred Stock Dividends, Income Statement Impact Net loss per share attributable to Class A common shareholders - Diluted Earnings (loss) per share attributable to Class A common shareholders - Diluted Loss per share attributable to Class A common shareholders - Diluted Minimum rental income to achieve from tenants for succeeding four consecutive fiscal quarters to access incremental funding facility Minimum Rental Income To Achieve From Tenants For Succeeding Four Consecutive Fiscal Quarters To Access Incremental Funding Facility Minimum rental income to achieve from tenants for succeeding four consecutive fiscal quarters to access incremental funding facility. Contract for sale. Contract For Sale [Member] Contract for Sale [Member] Operating Lease Variable Lease Income Expense Operating lease variable lease income expense. Variable rental revenues Amortization of Debt Issuance Costs Amortization of deferred financing costs Sears Holdings Corporation [Member] Sears Holdings Corporation [Member] Sears Holdings Corporation. Schedule of Future Amortization of Acquired Leases Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Summary of Properties Contributed In Unconsolidated Entities Summary Of Properties Contributed In Entities Table [Text Block] Summary of properties contributed in entities. Preferred shares, authorized Preferred Stock, Shares Authorized Total expenses Costs and Expenses Finite-Lived Intangible Assets by Major Class Finite-Lived Intangible Assets by Major Class [Axis] Two Partners [Member] Two Partners. Lender Name Lender Name [Axis] Summary of Dividends and Distributions Schedule of Dividends Payable [Table Text Block] Simon Property Group Inc [Member] Simon Property Group Inc [Member] Simon Property Group Inc. Accounts payable, accrued expenses and other liabilities Accounts Payable and Other Accrued Liabilities Related Party Transaction [Line Items] Related Party Transaction [Line Items] Entity Registrant Name Entity Registrant Name Percentage of increase in annual rent Sale Leaseback Interest Annual Percentage Increase Sale leaseback interest annual percentage increase. Debt Debt Disclosure [Text Block] Principal payment on loan Debt Instrument, Periodic Payment, Principal Lessee Disclosure [Abstract] Finite-Lived Intangible Asset, Expected Amortization, Year Two 2028 Other Nonoperating Income (Expense), Total Other Nonoperating Income (Expense) Other income (expenses) Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional Paid in Capital, Total Additional paid in capital Additional Paid in Capital Incremental Funding Facility [Member] Incremental Funding Facility [Member] Incremental funding facility. Proceeds from Sale of Real Estate Held-for-investment, Total Net proceeds from sale of real estate Proceeds from sale of assets Gross proceeds from sale of assets Consolidated Entities [Domain] Finite-Lived Intangible Asset, Expected Amortization, Year Three 2029 (Provision for) / benefit from taxes (Provision for) / benefit from taxes Total Tax (Provision)/Benefit from income taxes Provision for income taxes Benefit (provision) from income taxes Measurement Frequency [Axis] RD Management [Member] R D Management [Member] RD Management [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Subsidiary, Ownership Percentage, Noncontrolling Owner Ownership interest percentage held by related party Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Former Chairman. Former Chairman [Member] Former Chairman [Member] Share-Based Compensation Compensation Related Costs, Policy [Policy Text Block] Consolidated Properties [Member] Consolidation Items [Axis] Share units granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Total assets Assets Finite-Lived Intangible Assets, Net [Abstract] Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment [Table] Income Statement [Abstract] Additional deferred tax benefit Deferred Income Tax Expense (Benefit), Total Deferred income tax expense (benefit) Deferred income tax benefit Restricted shares vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Earnings Per Share, Diluted, Total Earnings Per Share, Diluted Net income/(loss) per share attributable to Seritage Class A common shareholders - Diluted Net loss per share attributable to Seritage Class A common shareholders - Diluted Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Reconciliation of Total Revenue to consolidated Net Loss Operating Segments [Member] Operating Segments [Member] Finite-Lived Intangible Asset, Expected Amortization, Year Five 2031 Title and Position [Domain] Real Estate Term Loan [Member] Real estate term loan. Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] City Area Code City Area Code S 2025 Q1 Dividends [Member] S 2025 Q1 Dividends [Member] S 2025 Q1 Dividends [Member] Proceeds from Lines of Credit Proceeds from Lines of Credit, Total Amount drawn under credit facility Buildings and Improvements, Gross, Total Buildings and improvements Buildings and Improvements, Gross Property Subject To Or Available For Operating Lease By Major Property Class [Table] Property, Plant, and Equipment, Lessor Asset under Operating Lease [Table] Unusual or Infrequent Item, or Both Unusual or Infrequent Item, or Both [Axis] Real Estate Investment Property At Cost1 Real Estate Investment Property, at Cost, Total Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. Basis of Presentation and Principles of Consolidation Basis Of Presentation And Principles Of Consolidation Policy [Text Block] Basis Of Presentation And Principles Of Consolidation Policy [Text Block] Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Real Estate [Domain] Below Market Ground Leases [Member] Below Market Ground Leases [Member] Below Market Ground Lease [Member] Segment Reporting Information [Line Items] Site Improvement [Member] Land Improvements [Member] Lease Expiration Date Revised lease end date Amortization of above and below market leases, net Amortization of above and below Market Leases Fair value discount rate Fair Value Inputs Discount Rate Fair value inputs discount rate. Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Distributions from unconsolidated entities Proceeds from Equity Method Investment, Distribution Development of real estate Payments to Develop Real Estate Assets Cash and cash equivalents, and restricted cash, beginning of period Cash and cash equivalents, and restricted cash, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Cash and cash equivalents and restricted cash Cash and cash equivalents and restricted cash at end of period Accumulated Deficit [Member] Retained Earnings [Member] Investment in real estate, gross Assets, Noncurrent Class C Common Shares [Member] Common Class C [Member] Share-based Payment Arrangement, Noncash Expense, Total Share-based compensation Share-Based Payment Arrangement, Noncash Expense Number of Variable Interest Entity Unconsolidated Has Investments Number of variable interest entity unconsolidated has investments. Number of variable interest entity unconsolidated has investments Stock issued and exchanged during period shares conversion of units. Stock Issued and Exchanged During Period Shares Conversion Of Units OP Units issued and exchanged, shares Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Minimum net worth required for loan documentation on book basis Minimum Net Worth Required For Loan Documentation On Book Basis Minimum net worth required for loan documentation on book basis. Class of Stock [Line Items] Class of Stock [Line Items] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash used in financing activities Minimum rental income to achieve from tenants on annual basis to access incremental funding facility Minimum Rental Income To Achieve From Tenants On Annual Basis To Access Incremental Funding Facility Minimum rental income to achieve from tenants on annual basis to access incremental funding facility. Lessor, Operating Lease, Payment to be Received, Year Three 2029 Sale leaseback term Sale Leaseback Transaction, Lease Terms Lease termination, description Master Lease Termination Description Master lease termination description. Schedule Of Basic And Diluted Net Income Loss Per Share [Line Items] Schedule Of Basic And Diluted Net Income Loss Per Share [Line Items] Schedule Of Basic And Diluted Net Income Loss Per Share [Line Items] Sale Leaseback Transaction, Description of Asset(s) Sale leaseback description Operating Partnership [Member] Operating Partnership [Member] Operating Partnership [Member] Management and Other Fee Income Management and Investment Advisory Fees, Policy [Policy Text Block] Entity Interactive Data Current Entity Interactive Data Current Unconsolidated entities including UTC JV. Unconsolidated Entities Including UTC JV [Member] Components of Lease Revenues Operating Lease, Lease Income [Table Text Block] Income Statement Location Statement of Income Location, Balance [Domain] Schedule Of Operating Leases Future Minimum Payments Receivable [Table] Schedule Of Operating Leases Future Minimum Payments Receivable [Table] Schedule Of Operating Leases Future Minimum Payments Receivable [Table] CASH FLOW FROM OPERATING ACTIVITIES Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Other Receivable, after Allowance for Credit Loss, Related Party [Extensible Enumeration] Real Estate, Type of Property [Axis] Term Loan Facility Net Term loan Ffacility net. Term loan facility, net Term loan facility Concentration risk annualized base rent percentage. Concentration Risk Annualized Base Rent Percentage Annualized base rent Number of properties Number Of Joint Venture Properties Number of joint venture properties. Above-Market Leases [Member] (Above)/ Below Market Leases, Net [Member] Above-market leases, Net [Member] Borrowing capacity amount Line of Credit Facility, Current Borrowing Capacity Hialeah Hialeah [Member] Hialeah. Gain on sale of real estate Gains (Losses) on Sales of Investment Real Estate Gain (loss) on sale Gain on sale of real estate Entity Tax Identification Number Entity Tax Identification Number Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Members' Interest REVENUE Revenues [Abstract] Long-term Debt, Type Long-Term Debt, Type [Axis] Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Schedule of Assets Measured at Fair Value on Nonrecurring Basis Straight-line rent adjustment Straight Line Rent Adjustments S 2023 Q1 Dividends. S 2023 Q1 Dividends [Member] Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Construction in progress Construction in Progress, Gross Local Phone Number Local Phone Number Related Party Transaction Related Party Transaction [Domain] Denominator - Basic and Diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Payment of Incremental Facility Fees Payment of incremental facility fees Payment of incremental facility fee Time Based Restricted Shares and Share Units [Member] Time Based Restricted Shares And Restricted Share Units [Member] Time based restricted shares and restricted share units. Percentage ownership of outstanding common shares after effect of exchange of operating partnership interest. Percentage Ownership Of Outstanding Common Shares After Effect Of Exchange Of Operating Partnership Interest Percentage ownership of outstanding common shares after effect of exchange of operating partnership interest Payment of deferred financing costs Payments of Financing Costs Payments of Financing Costs, Total Gain or loss on sale of real estate based on final contribution value Gains Losses On Sales Of Investment Real Estate On Final Contribution Value Gains (losses) on sales of investment real estate on final contribution value. Gain or loss on sale of real estate based on final contribution value Accounting Policies [Abstract] Management and related fees income Revenue from Contract with Customer, Excluding Assessed Tax, Total Revenue from Contract with Customer, Excluding Assessed Tax Management and other fee income Numerator - Basic and Diluted Net Income (Loss) Attributable to Parent [Abstract] Lessee, Operating Lease, Liability, to be Paid, Year Four Expected cash payments on operating leases in 2030 Class of Stock Class of Stock [Domain] Labor and Related Expense Personnel expenses Personnel expenses Unrecognized compensation costs, weighted average expected recognition period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Schedule Of Stock By Class [Table] Stock, Class of Stock [Table] Entity Emerging Growth Company Entity Emerging Growth Company Interest and Other Income [Member] Interest and Other Income [Member] Interest and other income.