Identified intangible assets, net of accumulated amortization Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Additional Capital Additional Paid-in Capital [Member] Tabular List, Table Tabular List [Table Text Block] Unsecured Term Loan July 2025 through October 2026 Unsecured Term Loan Expiring October 2026 [Member] Unsecured Term Loan Expiring October 2026 Gross amount Finite Lived Intangible Liability Gross This element represents the identifiable intangible liability established upon acquisition based on an unfavorable difference between the terms of an acquired lease and the current market terms for that lease at the acquisition date. Recently Issued Accounting Literature New Accounting Pronouncements, Policy [Policy Text Block] LTPP Long-Term Performance Award 2023 [Member] Long-Term Performance Award 2023 Real estate impairment losses Impairment Of Real Estate And Related Write-Offs Impairment Of Real Estate And Related Write-Offs Transaction related costs and other, net Real Estate Acquisition and Related Transaction Cost Acquisition and related transaction cost associate with Real Estate business activities. Realized and unrealized losses Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Realized And Unrealized Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Realized And Unrealized Schedule of Carrying Amounts and Fair Values of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Maximum exposure to loss Guarantor Obligations, Maximum Exposure, Undiscounted Measurement Basis [Axis] Measurement Basis [Axis] Adjustment to Compensation: Adjustment to Compensation [Axis] Property management fee agreement escalation percentage (as a percent) Property Management Fee Agreement Escalation Percentage Of Income Property Management Fee Agreement Escalation Percentage Of Income Related Party Transactions Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Equity method investment debt of partially owned entities Equity Method Investment Debt Of Partially Owned Entities Equity Method Investment Debt Of Partially Owned Entities Revenue Recognition Revenue from Contract with Customer [Text Block] 131-135 West 33rd Street One Three One to One Three Five West Thirty Three [Member] Alexander's Alexander’s, Inc [Member] Alexander’s, Inc Dividends paid on preferred shares Distributions to preferred unitholders Payments of Ordinary Dividends, Preferred Stock and Preference Stock Buildings and improvements SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Percent vested, year four Share Based Compensation, Percent Vested, Year Two Share Based Compensation, Percent Vested, Year Two JV Corporate Joint Venture [Member] Percentage of affiliated entity owned by related parties Percentage Of Affiliated Entity Owned By Related Parties Percentage Of Affiliated Entity Owned By Related Parties Interest Rate Cap Interest Rate Cap [Member] Square footage of real estate property (in sqft) Area of Real Estate Property Payment guarantees Guarantees And Master Leases Guarantees And Master Leases Percentage breakdown of awards Share-based Compensation Arrangement by Share-based Payment Award, Percentage Breakdown Share-based Compensation Arrangement by Share-based Payment Award, Percentage Breakdown Adjustment to Compensation, Amount Adjustment to Compensation Amount Multiemployer Pension Plans Pension Plan [Member] Initial cost to company SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract] Other assets Increase (Decrease) in Other Operating Assets Mortgage , 888 Seventh Avenue Mortgage, 888 Seventh Avenue [Member] Mortgage, 888 Seventh Avenue Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Notional amount and swapped balance Derivative Asset, Notional Amount Interest rate (in percent) Loans Receivable, Interest Rate, Stated Percentage Loans Receivable, Interest Rate, Stated Percentage Total, net Finite Lived Intangible Liabilities Net The aggregate sum of gross carrying value of a major finite-lived intangible liabiltiy class, less accumulated amortization. A major class is composed of intangible liabilities that can be grouped together because they are similar, either by their nature or by their use in the operations of a company Revolving Credit Facility, 2031 Revolving Credit Facility, 2031 [Member] Revolving Credit Facility, 2031 Vornado stock options Share-Based Payment Arrangement, Option [Member] Additions during the period SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Addition Cash And Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Cash payments for income taxes Income Taxes Paid Total shareholders' / partners' equity Equity Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Common shares of beneficial interest: authorized shares (in shares) Common Stock, Shares Authorized Recurring Fair Value, Recurring [Member] Senior unsecured notes Senior unsecured notes Senior Unsecured Notes [Member] Senior Unsecured Notes [Member] LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY Liabilities and Equity [Abstract] State and Local Jurisdiction State and Local Jurisdiction [Member] Cover [Abstract] Cover [Abstract] Cash equivalents, fair value Cash and Cash Equivalents, Fair Value Disclosure Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Rego Park 2 Property Rego Park 2 Property [Member] Rego Park 2 Property [Member] Dispositions Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Maximum Maximum [Member] Options exercisable at end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price 3 East 54th Street 3 East 54th Street [Member] 3 East 54th Street Farley Office And Retail Building Farley Office And Retail Building [Member] Farley Office And Retail Building Identified intangible assets, net of accumulated amortization of $81,962 and $75,002 Total, net Finite-Lived Intangible Assets, Net Vornado restricted stock Restricted Stock [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Change in deferred tax liability Change in Valuation of Deferred Tax Liabilities Change in Valuation of Deferred Tax Liabilities Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, by Property [Table] SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, by Property [Table] Debt Instrument Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] 339 Greenwich Street Three Three Nine Greenwich [Member] Three Three Nine Greenwich [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Other Assets Other Assets [Member] Expense from deferred compensation plan liability Mark-to-market Expense (Benefit) of Investments in Deferred Compensation Plan Mark-to-market Expense (Benefit) of Investments in Deferred Compensation Plan Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income before income taxes Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward] SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward] Recourse Status [Domain] Recourse Status [Domain] 435 Seventh Avenue mortgage loan 435 Seventh Avenue mortgage loan [Member] 435 Seventh Avenue mortgage loan Redeemable Class A unit measurement adjustment Redeemable Class A unit measurement adjustment Adjustments to Additional Paid in Capital, Redeemable Stock Unit Measurement Adjustment Adjustments to Additional Paid in Capital, Redeemable Stock Unit Measurement Adjustment Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Schedule of Performance AO LTIP Units Activity Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block] Percentage share of mortgage loan Debt Instrument, Ownership Percentage Debt Instrument, Ownership Percentage Less comprehensive (income) loss attributable to noncontrolling interests Less comprehensive loss attributable to noncontrolling interests in consolidated subsidiaries Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] 731 Lexington Avenue Lexington Avenue 731 [Member] Dow Jones U.S. Real Estate Office Index Dow Jones U.S. Real Estate Office Index [Member] Dow Jones U.S. Real Estate Office Index Change in fair value of marketable securities Debt Securities, Available-for-Sale, Gain (Loss) Document Fiscal Period Focus Document Fiscal Period Focus Award Timing Method Award Timing Method [Text Block] Award Type [Axis] Award Type [Axis] 2028 Sales-Type and Direct Financing Leases, Payment to be Received, Year Three Investment, Name [Domain] Investment, Name [Domain] Operating Lease, Variable Component Two Operating Lease, Variable Component Two [Member] Operating Lease, Variable Component Two Trading Symbol Trading Symbol 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four Leases [Table] Leases [Table] Leases [Table] Deferred compensation shares and options (in shares) Deferred compensation units and options (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract] Entity Address, City or Town Entity Address, City or Town 770 Broadway 770 Broadway [Member] 770 Broadway Receivable [Axis] Loan Receivable [Axis] Loan Receivable Identified Intangible Assets and Liabilities Intangible Assets Disclosure [Text Block] Lease fee percentage of rent twenty first to thirty years Lease Fee Percentage Of Rent Twenty First To Thirty Years Percentage of rent receivable from related party for leasing services for the twenty-first through thirtieth years of the lease. Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount 1131 Third Avenue One One Three One Third Avenue [Member] One One Three One Third Avenue [Member] Less: Accumulated depreciation on assets sold, written-off and deconsolidated SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation, Investment in Real Estate Sold Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] 888 Seventh Avenue 888 Seventh Avenue [Member] 888 Seventh Avenue Entity Emerging Growth Company Entity Emerging Growth Company Other (Including Signage) Other Including Signage [Member] New York Office Other Including Signage [Member] 2028 Long-Term Debt, Maturity, Year Three Options outstanding at beginning of period (in shares) Options outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Mortgage Loan Encumbering The Property Mortgage Loan Encumbering The Property [Member] Mortgage Loan Encumbering The Property Deferred financing costs, net and other Deferred financing costs, net and other Debt Issuance Costs, Net Interest and Debt Expense Interest And Debt Expense [Text Block] This disclosure relates to the details of interest and debt expense of the company. The interest expense relates to secured and unsecured debt of the company Restricted cash Restricted cash at beginning of period Restricted cash at end of period Restricted Cash and Cash Equivalent 527 West Kinzie, Illinois Merchandise Mart IL 527 W. Kinzie, Chicago [Member] Merchandise Mart IL 527 W. Kinzie, Chicago [Member] Residential Properties Residential Properties [Member] Residential Property [Member] Common shares of beneficial interest: outstanding shares (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Insurance Insurance [Abstract] Chief Executive Officer Chief Executive Officer [Member] Percentage of company owned by related party Percentage Of Company Owned By Related Party his element represents the percentage of the company owned by related party Schedule of Share Based Compensation Restricted Operating Partnership Units Activity Schedule Of Sharebased Compensation Restricted Operating Partnership Units Activity [Table Text Block] For restricted operating partnership units, disclosure of the number and weighted-average grant date fair value for restricted operating partnership units that were outstanding at the beginning and end of the year, and the number of restricted operating partnership units that were granted, vested, or forfeited during the year. Unearned 2020 Out-Performance Plan and 2019 Performance AO LTIP awards Adjustments to Additional Paid in Capital, Unearned Performance Awards Adjustments to Additional Paid in Capital, Unearned Performance Awards Schedule of Revenues by Segment Disaggregation of Revenue [Table Text Block] Supervisory fee (as a percent) Supervisory Fee, Percent Supervisory Fee, Percent Operating Partnership Operating Partnership [Member] Operating Partnership [Member] THE MART, Illinois Merchandise Mart Chicago [Member] Merchandise Mart Merchandise Mart [Member] Development fee (as a percent) Development Fee Percent Development fee as a percentage of the property development costs Buildings and improvements SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Schedule of Estimated Annual Amortization Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Increase in share price (as a percent) Percentage Increase In Share Price Percentage Increase In Share Price Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Weighted average interest rate Weighted Average Interest Rate Interest rate, effective percentage (in percent) Debt Instrument, Interest Rate, Effective Percentage Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Income tax expense Income tax expense Income Tax Expense (Benefit) Investment in loan receivable Payments to Acquire Loans Receivable Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Real estate and accumulated depreciation life used for depreciation (in years) SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation 280 Park Avenue Mezzanine Loan 280 Park Avenue Mezzanine Loan [Member] 280 Park Avenue Mezzanine Loan Other assets Other Assets Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 666 Fifth Avenue, At Grade 666 Fifth Avenue, At Grade [Member] 666 Fifth Avenue, At Grade Preferred shares of beneficial interest: issued shares (in shares) Preferred Stock, Shares Issued Unsecured term loan, net Unsecured Debt Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Designated as a Hedge Designated as Hedging Instrument [Member] 555 California Street, Forward Swap 555 California Street, Forward Swap [Member] 555 California Street, Forward Swap Details Of Preferred Shares Of Beneficial Interest Details Of Preferred Shares Of Beneficial Interest [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Change in fair value of consolidated interest rate hedges and other Change in fair value of consolidated interest rate hedges and other Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Transaction Related Costs, Impairment Losses and Other [Abstract] Transaction Related Costs, Impairment Losses and Other [Abstract] Transaction Related Costs, Impairment Losses and Other [Abstract] Unsecured term loan Unsecured Term Loan [Member] Unsecured Term Loan Benchmark [Axis] Share-Based Compensation Arrangement Benchmark [Axis] Share-Based Compensation Arrangement Benchmark Grant-date fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period, Fair Value The fair value at grant date for equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Contributions Redeemable Noncontrolling Interest, Increase from Contributions to Noncontrolling Interest Holders Redeemable Noncontrolling Interest, Increase from Contributions to Noncontrolling Interest Holders Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Proceeds from stock options exercised Proceeds from Stock Options Exercised Dividends to Vornado (in dollars per share) Dividends Payable, Amount Per Share All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Preferred share dividends/unit distributions Preferred unit distributions Preferred Stock Dividends, Income Statement Impact SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract] SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract] Outstanding at December 31 , 2024 (in shares) Outstanding at December 31 , 2025 (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Multiemployer Plan, Pension, Significant [Abstract] Below Market Leases Net Of Above Market Leases Below Market Leases Net Of Above Market Leases, Netting [Member] Below Market Leases Net Of Above Market Leases, Netting Equity method investment fair value Equity Method Investment, Quoted Market Value Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Debt term Debt Instrument, Term Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Proceeds from sales of real estate and other Proceeds from Sale of Other Real Estate Return of capital from real estate fund investments Return of Capital from Real Estate Fund Investments Return of Capital from Real Estate Fund Investments Buildings & improvements and other Building Improvements [Member] Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Schedule of Multiemployer Plans [Table] Multiemployer Plan [Table] Subsequent Event Subsequent Event [Member] Real Estate [Line Items] Real Estate [Line Items] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Proceeds from maturities of U.S. Treasury bills Proceeds from Sale of Short-Term Investments PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Loan balance Loans Payable to Bank Equity Components [Axis] Equity Components [Axis] Real Estate Properties Real Estate Properties [Line Items] Collateral property, net carrying value Collateral Property Net Carrying Value The net carrying value of property collateralizing the notes and mortgages payable Operational Operational [Member] Operational Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Period allowed for termination of automatic renewal of management agreement Period Allowed For Termination Of Automatic Renewal Of Management Agreement Maximum Period Allowed For Termination Of Automatic Renewal Of Management Agreement Expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period Mortgages payable, net Total, net Loans payable Loans Payable Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Entity Address, State or Province Entity Address, State or Province Thereafter Sales-Type and Direct Financing Leases, Payment to be Received, after Year Five Numerator for diluted income per common share/Class A unit Undistributed Earnings (Loss) Available to Common Shareholders, Diluted Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Dividends on common shares Distribution, common stock Dividends, Common Stock Loans receivable (included in investments in partially owned entities and in other assets) Loans Receivable, Fair Value Disclosure Special allocation (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Special Allocation Share-based Compensation Arrangement by Share-based Payment Award, Special Allocation Weighted average units outstanding (in shares) Denominator for diluted income per Class A unit – weighted average units and assumed conversions (in shares) Weighted Average Limited Partnership Units Outstanding, Diluted A-Note A-Note [Member] A-Note Rental revenues Rental revenues Rental Revenue [Member] Rental Revenue [Member] Individual: Individual [Axis] Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract] Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Abstract] Income Tax Authority [Domain] Income Tax Jurisdiction [Domain] Other, net Other Net Attributable To Redeemable Noncontrolling Interest Other Net Attributable To Redeemable Noncontrolling Interest Dividends paid on common shares Distributions to Vornado Payments of Ordinary Dividends, Common Stock Document Annual Report Document Annual Report Entities [Table] Entities [Table] 90 Park Avenue Ninety Park Avenue [Member] New York Office 90 Park Avenue [Member] Deferred leasing costs, net of accumulated amortization Decrease In Assets Resulting From Deconsolidation, Deferred Leasing Costs, Net Decrease In Assets Resulting From Deconsolidation, Deferred Leasing Costs, Net Amortization of below-market leases, net Amortization of Below Market Lease Extension term Debt Instrument, Extension Term Debt Instrument, Extension Term Contributions from noncontrolling interests in consolidated subsidiaries Proceeds from Noncontrolling Interests 40 East 66th Street Residential, New York Four Zero East 66th Street Residential [Member] Seven Five Nine - Seven Seven One Madison Avenue Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayments of borrowings Repayments of long-term debt Repayments of Long-Term Debt 770 Broadway Lessor, Sales-type Leases [Text Block] Entity Interactive Data Current Entity Interactive Data Current Weighted- Average Remaining Contractual Term Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Distributions of capital from partially owned entities Distributions Of Capital From Partially Owned Entities This item represents disclosure of the amount of capital distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. The Farley Building The Farley Building [Member] The Farley Building Options exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Deferred tax assets, net Deferred Tax Assets, Operating Loss Carryforwards Costs capitalized subsequent to acquisition SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Improvements New York University (“NYU”) New York University (“NYU”) [Member] New York University (“NYU”) 435 Seventh Avenue Four Three Five 7th Avenue [Member] New York Office 435 7th Avenue [Member] Ownership [Domain] Ownership [Domain] Land SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land Net loss attributable to nonredeemable noncontrolling interests in consolidated subsidiaries Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest Schedule of Future Undiscounted Cash Flows Under Non-Cancelable Operating Leases Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Per unit liquidation preference (in dollars per share) Temporary Equity, Liquidation Preference Per Share Auditor [Table] Auditor [Table] Schedule of Unrecognized Compensation Expense Share-Based Payment Arrangement, Nonvested Award, Cost [Table Text Block] Entity Central Index Key Entity Central Index Key PEO Name PEO Name Schedule of Principal Maturities of Mortgages Payable and Unsecured Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Total revenues Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] One Park Avenue Mortgage Loan due March 2026 One Park Avenue Mortgage Loan due March 2026 [Member] One Park Avenue Mortgage Loan due March 2026 Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Right-of-use assets Decrease In Assets Resulting From Deconsolidation, Right-Of-Use Assets Decrease In Assets Resulting From Deconsolidation, Right-Of-Use Assets Interest and Other Income [Abstract] Interest and Other Income [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Performance condition 1 Share-Based Payment Arrangement, Tranche One [Member] Office Building Office Building [Member] Exercise Price Award Exercise Price Funding Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Funding Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Funding Entity Filer Category Entity Filer Category Class of Stock [Domain] Class of Stock [Domain] Change in fair value of consolidated interest rate hedges and other Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges And Other, Net of Tax Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges And Other, Net of Tax Unrecognized stock-based compensation expense Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Prepaid lease payment (net of initial direct costs) Prepaid lease payment Lessor, Sales-Type Lease, Prepaid Lease Payments Lessor, Sales-Type Lease, Prepaid Lease Payments Subsequent Event Type [Axis] Subsequent Event Type [Axis] Schedule of Preferred Units Schedule of Preferred Units [Table Text Block] Consideration received Disposal Group, Including Discontinued Operation, Consideration Balance Sheet Location [Axis] Statement of Financial Position Location, Balance [Axis] 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Three Vesting [Domain] Vesting [Domain] Note Financing Receivable, before Allowance for Credit Loss Loan balance applied Debt Instrument, Loan Payable Credited To Purchase Price Debt Instrument, Loan Payable Credited To Purchase Price Insurance limit per occurrence Insurance Limit Per Occurrence Insurance Limit Per Occurrence Gross amount Finite-Lived Intangible Assets, Gross Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Entity Address, Address Line One Entity Address, Address Line One Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Deferred Charges Deferred Charges, Policy [Policy Text Block] Total redeemable noncontrolling interests Noncontrolling interests Beginning balance Ending balance Redeemable Noncontrolling Interest, Equity, Carrying Amount Ownership [Axis] Ownership [Axis] Transaction related costs, impairment losses and other Transaction related costs, impairment losses and other Restructuring, Settlement and Impairment Provisions Name of Property [Domain] Name of Property [Domain] Fair Value as of Grant Date Award Grant Date Fair Value 138-142 West 32nd Street One Three Eight - 142 West 32nd Street [Member] One Three Eight - 142 West 32nd Street Property. Income per common share: Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax [Abstract] 150 East 58th Street One Five Zero East 58th Street [Member] New York Office 150 East 58th Street [Member] Net operating loss carryforwards Operating Loss Carryforwards Deferred compensation plan Deferred Compensation Liability, Current and Noncurrent Schedule of Debt Schedule of Long-Term Debt Instruments [Table Text Block] Share/unit-based awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Title of Individual [Domain] Title and Position [Domain] Related Party Transaction Related Party Transaction [Line Items] Fixed rate Fixed Rate [Member] Fixed Rate [Member] Impact of assumed conversion of dilutive potential convertible securities Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities Schedule of Stock-based Compensation Expense Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] Debt, carrying amount Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Schedule of Sales-Type and Direct Financing Leases, Payment to be Received, Maturity Sales-Type and Direct Financing Leases, Payment to be Received, Maturity [Table Text Block] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two 1535 Broadway 1535 Broadway [Member] 1535 Broadway Investments, All Other Investments [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Partially Owned Properties Partially Owned Properties [Member] OPP Units OPP Units Out Performance Plan [Member] Out Performance Plan. Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Number of units in real estate property Number of units Number of Units in Real Estate Property Interest on cash and cash equivalents and restricted cash Interest on Cash and Cash Equivalents and Restricted Cash Interest on Cash and Cash Equivalents and Restricted Cash Interest and debt expense Interest and debt expense, total Interest and debt expense Interest and Debt Expense Equity method effective ownership percentage Equity Method Investment, Effective Ownership Percentage Equity Method Investment, Effective Ownership Percentage Non-PEO NEO Non-PEO NEO [Member] Outstanding letters of credit Letters of Credit Outstanding, Amount General Liability General Liability [Member] Aggregate intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value 100 West 33rd Street Hundred West 33rd Street [Member] New York Office 100 West 33rd Street [Member] 512 West 22nd Street 512 West 22nd Street [Member] 512 West 22nd Street Preferred stock dividend rate Preferred Stock, Dividend Rate, Percentage Prior Alexander's Loan, Maturing in December 2025 Prior Alexander's Loan, Maturing in December 2025 [Member] Prior Alexander's Loan, Maturing in December 2025 Lease term Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Asset unguaranteed residual value Sales-type Lease, Unguaranteed Residual Asset Independence Plaza Independence Plaza [Member] Independence Plaza Unswapped Balance Derivative Liability, Notional Amount Land Land [Member] Insurance deductible percentage of balance of covered loss Insurance Deductible Percentage Of Balance Of Covered Loss Insurance deductible, percentage of balance of a covered loss Award Type [Domain] Award Type [Domain] Management and leasing fees Management And Leasing Fees [Member] Management And Leasing Fees [Member] 2026 Lessee, Operating Lease, Liability, to be Paid, Year One Noncontrolling interests in consolidated subsidiaries Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Other non-cash adjustments Other Noncash Income (Expense) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Preferred or annual distribution rate (in dollars per share) Redeemable Noncontrolling Interest Operating Partnership Units Distribution Rate Preference or annual distribution rate of the operating partnership units held by third parties that are included in the redeemable noncontrolling interests on the consolidated balance sheet. Net realized and unrealized gain on real estate fund investments Net Realized and Unrealized Gain (Loss) On Real Estate Fund Investments This element represents the realized and unrealized gains included in the earnings resulting from assets that are measured at fair value, that relate to the real estate funds assets. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Expected dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Straight-lining of rents Straight Line Rent Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] Options exercisable, Number of options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options,, Exercisable, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options,, Exercisable, Number Multiemployer Plans Type [Domain] Retirement Plan Type [Domain] Number of properties sold Number of Properties Sold Number of Properties Sold MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Senior Unsecured Notes Due 2033 Senior Unsecured Notes Due 2033 [Member] Senior Unsecured Notes Due 2033 Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] REVENUES: Revenues [Abstract] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Encumbrances SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances Paramus, New Jersey Paramus, New Jersey [Member] Paramus, New Jersey Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Net of Tax 2026 Long-Term Debt, Maturity, Year One Deconsolidation of cash and restricted cash held by a previously consolidated entity Deconsolidation of cash and restricted cash held by a previously consolidated entity Cash Divested from Deconsolidation Purchases Investment in loan receivable Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Award Date [Domain] Award Date [Domain] 2030 Long-Term Debt, Maturity, Year Five Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Options exercisable, Weighted average exercise price per share December 31, 2025 (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Exercisable, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Exercisable, Weighted Average Exercise Price Net Investment Income [Line Items] Net Investment Income [Line Items] Equity method investment pro rata share debt of partially owned entities Equity Method Investment Pro Rata Share Debt Of Partially Owned Entities 825 Seventh Avenue Eight Two Five 7th Avenue [Member] New York Office 825 7th Avenue [Member] Term of management agreement Term Of Management Agreement Renewal Term Of Management Agreement Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] 2029 Sales-Type and Direct Financing Leases, Payment to be Received, Year Four 49 West 57th Street 49 West 57th Street [Member] 49 West 57th Street Minimum Minimum [Member] Management, leasing and development fees Management Leasing And Development Fees Management Leasing And Development Fees Partnership Interest Partnership Interest [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Aggregate of preferred equity interests Real Estate Investments, Joint Ventures Company Selected Measure Name Company Selected Measure Name Vornado Realty L.P. Vornado Realty L.P. [Member] Leasehold improvements, equipment and other Leasehold Improvements Equipment and Other [Member] Leasehold Improvements Equipment and Other [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Debt Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Cash paid for operating leases Operating Lease, Payments Percentage of lease fee, related party Percentage of Lease Fee, Related Party Percentage of Lease Fee, Related Party Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Collateral Held [Domain] Collateral Held [Domain] PENN 11 PENN 11 [Member] PENN 11 Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Performance condition 2 Share-Based Payment Arrangement, Tranche Two [Member] Tenant services Tenant Services [Member] Tenant Services [Member] Weighted average shares outstanding (in shares) Denominator for diluted income per common share - weighted average shares and assumed conversions (in shares) Weighted Average Number of Shares Outstanding, Diluted Net income (loss) allocation Income Tax, Allocation Ratio Income Tax, Allocation Ratio Upon redemption of Class A units, at redemption value (in shares) Upon redemption of redeemable Class A units, at redemption value (in shares) Stock Issued During Period, Shares, Conversion of Units Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Options outstanding, Weighted average remaining contractual term Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Derivative [Table] Derivative [Table] Default interest waived, period Debt Instrument, Default Interest, Waived, Period Debt Instrument, Default Interest, Waived, Period Additional default stated rate (as a percent) Debt Instrument, Default Interest Rate, Stated Percentage Debt Instrument, Default Interest Rate, Stated Percentage 2023 Performance AO LTIP Units 2023 Performance Conditioned Appreciation Only Long Term Incentive Plan Units [Member] 2023 Performance Conditioned Appreciation Only Long Term Incentive Plan Units Entity Small Business Entity Small Business Operating Partnership Net income attributable to redeemable partnership units Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Schedule of Amounts Included in Measurement of Lease Liability Schedule Of Amounts Included In Measurement Of Lease Liability [Table Text Block] Schedule of Amounts Included in Measurement of Lease Liability [Table Text Block] Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Component Type [Domain] Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Component Type [Domain] Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Component Type [Domain] 1290 Avenue of the Americas One Two Nine Zero Avenue Of Americas [Member] New York Office 1290 Avenue Of The Americas [Member] Derivative, average remaining maturity Derivative, Average Remaining Maturity Preferred shares of beneficial interest: outstanding shares (in shares) Beginning balance (in shares) Ending balance (in shares) Preferred shares/units outstanding (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Interest expense Interest Costs Incurred Lease fee percentage of rent eleven to twenty years Lease Fee Percentage Of Rent Eleven To Twenty Years Percentage of rent receivable from related party for leasing services for the eleventh through twentieth years of the lease. Other comprehensive loss of nonconsolidated subsidiaries Other comprehensive income (loss) of nonconsolidated subsidiaries Other Comprehensive Income (Loss), Nonconsolidated Subsidiaries, after Tax This element represents the company's pro-rata share of other comprehensive income (loss) adjustments related to non-consolidated subsidiaries Other Commitments Other Commitments [Abstract] Underlying Securities Award Underlying Securities Amount Long-Term Performance Award 2022 Long-Term Performance Award 2022 [Member] Long-Term Performance Award 2022 Insurance maximum coverage limit in aggregate Insurance Maximum Coverage In Aggregate Insurance maximum coverage limit in aggregate. Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Leasehold improvements and equipment Fixtures and Equipment, Gross Proceeds on loan Proceeds from Lines of Credit SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Axis] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Acquisitions and Dispositions [Line Items] Acquisitions and Dispositions [Line Items] Acquisitions and Dispositions [Line Items] Lease liabilities Increase (Decrease) in Operating Lease Liability Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Average price per share (in dollars per share) Shares Acquired, Average Cost Per Share Northeast Peer Group Custom Index Northeast Peer Group Custom Index [Member] Northeast Peer Group Custom Index Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Farley Office and Retail Building Farley Office and Retail Building [Member] Farley Office and Retail Building [Member] Income Per Share and Per Class A Unit Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Additional capital Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] Revenues Revenue from Contract with Customer, Excluding Assessed Tax Litigation Status [Domain] Litigation Status [Domain] Amount representing interest Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount Percentage reduction threshold Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage Reduction Threshold Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage Reduction Threshold 966 Third Avenue Nine Six Six Third Avenue [Member] New York Office 966 Third Avenue [Member] Investment Income [Table] Investment Income [Table] Terrorism Acts Terrorism Acts [Member] Terrorism Acts [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Income from deferred compensation plan assets Gain Loss of investments in deferred compensation plan Gain Loss of investments in deferred compensation plan Variable billings Operating Lease, Variable Lease Income Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount All-In Swapped Rate Derivative, Fixed Interest Rate Net income per Class A unit (in dollars per unit) Basic (in dollars per share) Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Mortgage loans on real estate, face amount of mortgages SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages Disposal Group Name [Axis] Disposal Group Name [Axis] Exercises in period, intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net income attributable to common shareholders/Class A unitholders Net Income (Loss) Available to Common Stockholders, Basic Audit Information [Abstract] Audit Information Common shares issued: Class A units issued to Vornado: Common Shares Issued [Abstract] Entity Information [Line Items] Entity Information [Line Items] Deduct: NOI attributable to noncontrolling interests in consolidated subsidiaries NOI attributable to noncontrolling interests in consolidated subsidiaries Net Operating Income (Loss), Portion Attributable to Noncontrolling Interest, Total Net Operating Income (Loss), Portion Attributable to Noncontrolling Interest, Total Sales-type lease income Sales Type Lease Income [Member] Sales Type Lease Income Transaction Related Costs, Impairment losses and Other Transaction Related Costs, Impairment Losses and Other [Text Block] Transaction Related Costs, Impairment Losses and Other [Text Block] Total expenses Operating Expenses Decrease in assets and liabilities resulting from the derecognition of 770 Broadway: Decrease In Assets And Liabilities Resulting From The Derecognition of 770 Broadway [Abstract] Decrease In Assets And Liabilities Resulting From The Derecognition of 770 Broadway Level 1 Fair Value, Inputs, Level 1 [Member] Net gains on disposition of wholly owned and partially owned assets Net gains on disposition of wholly owned and partially owned assets Gain (Loss) on Disposition of Assets Unsecured revolving credit facilities Long-Term Line of Credit Insurance Coverage Type Name [Domain] Insurance Coverage Type Name [Domain] Preferred stock, redemption price per share (in dollars per share) Preferred Stock, Redemption Price Per Share Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Net income per common share (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Real estate accumulated depreciation Real Estate Accumulated Depreciation Before Accumulated Depreciation On Asset Sold And Written Off The subtotal of accumulated depreciation balance excluding accumulated depreciation on assets sold and write-off of accumulated depreciation on fully depreciated assets. 2030 Lessor, Operating Lease, Payment to be Received, Year Five Non-Cash Information: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Receivable arising from the straight-lining of rents Decrease In Assets Resulting From Deconsolidation, Receivable Arising From Straight-Lining Rents Decrease In Assets Resulting From Deconsolidation, Receivable Arising From Straight-Lining Rents Property rentals Property Rentals [Member] Property Rentals [Member] Cumulative Redeemable Preferred Unit Redeemable Noncontrolling Partnership Units Cumulative Redeemable Preferred Unit [Member] Cumulative Redeemable Preferred Unit [Member] Number of sales-type leases Number of Sales-Type Leases Number of Sales-Type Leases 715 Lexington Avenue Lexington Avenue 715 Retail [Member] Lexington Avenue 715 Retail [Member] Under dividend reinvestment plan Under Vornado's dividend reinvestment plan Stock Issued During Period, Value, Dividend Reinvestment Plan Real Estate And Accumulated Depreciation SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items] Unsecured Term Loan Expiring July 2027 Unsecured Term Loan Expiring July 2027 [Member] Unsecured Term Loan Expiring July 2027 Auditor Location Auditor Location Unconsolidated VIEs Variable Interest Entity, Not Primary Beneficiary [Member] San Francisco San Francisco [Member] Prepaid assets Increase (Decrease) in Prepaid Expense Investments in Partially Owned Entities Equity Method Investments and Joint Ventures Disclosure [Text Block] Net basis difference of assets and liabilities between tax basis and GAAP basis Net Basis Difference Of Assets And Liabilities Between Tax Basis And GAAP Basis Net Basis Difference Of Assets And Liabilities Between Tax Basis And GAAP Basis Repurchase of common shares Repurchase of Class A units owned by Vornado Stock Repurchased and Retired During Period, Value Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Other Stockholders' Equity, Other 825 Seventh Avenue Office Condominium 825 Seventh Avenue Office Condominium [Member] 825 Seventh Avenue Office Condominium Present value discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Debt Covenant [Axis] Debt Covenant [Axis] Debt Covenant [Axis] Receivable [Domain] Loan Receivable [Domain] Loan Receivable [Domain] 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Two Long-term debt, gross Long-Term Debt, Gross Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Total undiscounted cash flows Lessee, Operating Lease, Liability, to be Paid Distributions, share-based compensation Dividend, Share-Based Payment Arrangement Redeemable noncontrolling interest in a consolidated subsidiary Subsidiary Subsidiaries [Member] Distributions Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Ownership common shares, investee (in shares) Investment Owned, Balance, Shares Property management fee income Fee and other income from related parties Property Management Fee Revenue Schedule of Components of Lease Revenues Operating Lease, Lease Income [Table Text Block] Common Area 731 Lexington Avenue Common Area 731 Lexington Avenue [Member] Common Area 731 Lexington Avenue [Member] Expiration Date Trading Arrangement Expiration Date Junior C-Note Junior C-Note [Member] Junior C-Note Recourse Status [Axis] Recourse Status [Axis] Accumulated depreciation and amortization Accumulated depreciation, balance at beginning of period Accumulated depreciation, balance at end of period SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation Other liabilities Increase (Decrease) in Other Operating Liabilities 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Five 85 Tenth Avenue Eight Five Tenth Avenue [Member] Eight Five Tenth Avenue [Member] Less: Assets sold, written-off, reclassified to ready for sale and deconsolidated SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Cost of Investment in Real Estate Sold Sales-type lease income Sales-type Lease, Lease Income Schedule of Investments in Partially Owned Entities Equity Method Investments [Table Text Block] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Tenant and other receivables Increase (Decrease) in Accounts Receivable 6.5% Series A Series A Preferred Stock [Member] Entity Current Reporting Status Entity Current Reporting Status 606 Broadway Six Zero Six Broadway [Member] Property on 606 Broadway. Derivative [Line Items] Derivative [Line Items] Variable rent expense Variable Lease, Cost, Net of Adjustments Variable Lease, Cost, Net of Adjustments Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Collateral Held [Axis] Collateral Held [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Interstate Properties Interstate Properties [Member] Interstate Properties [Member] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Interest and other investment income, net Interest and other investment income, net Interest And Other Investment (Loss) Income, Net This element represents interest and other investment loss income net of tax including impairment losses, mark-to-market adjustments for derivatives or mark-to-market investments in deferred compensation. Repaid on loan Repayments of Debt Annapolis, Maryland Annapolis [Member] Annapolis [Member] Common limited partnership interest in the operating partnership Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Proceeds from borrowings Proceeds from Issuance of Long-Term Debt Contributions Noncontrolling Interest, Increase From Limited Partners' Contribution Increase in noncontrolling interest balance due to the limited partners' contributions Current Fiscal Year End Date Current Fiscal Year End Date Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Conversion Feature [Domain] Conversion Feature [Domain] Convertible Preferred Stock Convertible Preferred Stock [Member] Weighted-Average Grant-Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Leases [Line Items] Leases [Line Items] [Line Items] for Leases [Table] Interest rate swaps and caps, liability Fair Value Liability Derivative Liability Schedule of Real Estate Properties [Table] Real Estate Property, Ownership [Table] 431 Seventh Avenue Four Three One 7th Avenue [Member] New York Office 431 7th Avenue Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] 666 Fifth Avenue 666 Fifth Avenue [Member] 666 Fifth Avenue Unsold carrying amount Real Estate Held For Sale, Carrying Amount Real Estate Held For Sale, Carrying Amount Distributions to Vornado General Partners' Capital Account, Period Distribution Amount Distributions of income from partially owned entities Return on preferred equity, net of our share of the expense Proceeds from Equity Method Investment, Distribution Schedule of Aggregate the Fair Values of these Financial Assets and Liabilities Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Weighted average common share / class A unit equivalents of excluded dilutive securities due to anti-dilutive effect (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Exchange ratio Redeemable Noncontrolling Interest, Exchange Ratio Redeemable Noncontrolling Interest, Exchange Ratio 2027 Long-Term Debt, Maturity, Year Two Other Other Property [Member] Leases Lessee, Operating Leases [Text Block] Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] Credit losses on investments Credit losses on investments Financing Receivable, Credit Loss, Expense (Reversal) Tax Treatment Of Dividend [Domain] Tax Treatment Of Dividend [Domain] Basis of Presentation and Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Receivable arising from the straight-lining of rents Deferred Rent Receivables, Net Stock repurchase program, remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Default interest rate (in percent) Loans Receivable, Default Interest Rate, Percentage Loans Receivable, Default Interest Rate, Percentage Disposal Group Classification [Domain] Disposal Group Classification [Domain] SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Text Block] Rate Type [Axis] Rate Type [Axis] Rate Type [Axis] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Gross amount at which carried at close of period SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross [Abstract] Ordinary Income Under Section 199A Ordinary Income Under Section 199A [Member] Ordinary Income Under Section 199A Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Insurance limit per property Insurance Limit Per Property Insurance limit per property. Amortization of deferred financing fees Amortization of Debt Issuance Costs Risk free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Schedule of Rent Expense Lessor, Operating Rent Expense [Table Text Block] Lessor, Operating Rent Expense Entity Tax Identification Number Entity Tax Identification Number NOI at share NOI at share Operating Income (Loss) Cash Basis Represents cash basis of Net Operating Income which is before allocation to the noncontrolling interest of the Operating Partnership. Restricted Cash Restricted Cash [Member] Restricted Cash [Member] Senior Unsecured Notes due June 2026 Senior Unsecured Notes due June 2026 [Member] Senior Unsecured Notes due June 2026 Number of real estate properties Number of Real Estate Properties Options outstanding at beginning of period (in dollars per share) Options outstanding at end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Common shares of beneficial interest: issued shares (in shares) Common Stock, Shares, Issued Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term 2029 Long-Term Debt, Maturity, Year Four Wayne Towne Center, New Jersey Wayne Towne Center [Member] Wayne Towne Center [Member] Schedule of Redeemable Noncontrolling Partnership Units Redeemable Noncontrolling Interest [Table Text Block] Effect of dilutive securities/units Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Entity Public Float Entity Public Float Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Lease income Lease revenues Operating Lease, Lease Income Loss Contingencies [Line Items] Loss Contingencies [Line Items] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Security Exchange Name Security Exchange Name 5.25% Series M Series M Preferred Stock [Member] Series M Preferred Stock [Member] 2027 Lessor, Operating Lease, Payment to be Received, Year Two Retail Retail Site [Member] Accrued capital expenditures included in accounts payable and accrued expenses Capital Expenditures Incurred but Not yet Paid Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Dividends on preferred shares (see Note 11 for dividends per share amounts) Distributions to preferred unitholders (see Note 11 for distributions per unit amounts) Dividends on preferred shares Dividends, Preferred Stock Under dividend reinvestment plan (in shares) Under Vornado's dividend reinvestment plan (in shares) Stock Issued During Period, Shares, Dividend Reinvestment Plan EXPENSES: Operating Expenses [Abstract] Non-Certified Acts of Terrorism Non-Certified Acts of Terrorism [Member] Non-Certified Acts of Terrorism [Member] Asset Class [Domain] Asset Class [Domain] Other Decrease In Assets Resulting From Deconsolidation, Other Decrease In Assets Resulting From Deconsolidation, Other Statement [Line Items] Statement [Line Items] Insurance Coverage Type Name [Axis] Insurance Coverage Type Name [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash and Cash Equivalent Partners' capital General Partners' Capital Account Subsequent Event [Line Items] Subsequent Event [Line Items] 7 West 34th Street Seven West 34th Street [Member] New York 7 West 34th Street [Member] Development costs and construction in progress Development in Process Common Shares of beneficial interest, $.04 par value per share Common Shares Common Stock [Member] Units earned under the plan (in shares) Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Outstanding loan balance Loan, Held-in-Portfolio, Principal Outstanding Less accumulated depreciation and amortization Real Estate Investment Property, Accumulated Depreciation Net increase (decrease) in cash and cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Non-Recourse Loan Due 2026 Non-Recourse Loan Due 2026 [Member] Non-Recourse Loan Due 2026 Statistical Measurement [Domain] Statistical Measurement [Domain] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Mortage Loan Mortage Loan [Member] Mortage Loan Real Estate [Domain] Real Estate [Domain] Asset Class [Axis] Asset Class [Axis] Interest Rate Swap Interest Rate Swap [Member] Deferred financing costs Payments of Financing Costs Non-Recourse Loan Due 2025 Non-Recourse Loan Due 2025 [Member] Non-Recourse Loan Due 2025 Interest and Other Investment Income, Net Other Income and Other Expense Disclosure [Text Block] Equity in net income of partially owned entities Equity in net income Income (Loss) from Equity Method Investments Percent vested, year three Share Based Compensation, Percent Vested, Year One Share Based Compensation, Percent Vested, Year One Leases [Abstract] Leases [Abstract] Interest accrual Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Interest Accrual Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Interest Accrual INCOME PER COMMON SHARE - BASIC: INCOME PER CLASS A UNIT - BASIC: Income per common share: Earnings Per Share, Basic [Abstract] 2029 Lessor, Operating Lease, Payment to be Received, Year Four 1290 Avenue Of Americas Mortgage Loan 1290 Avenue Of Americas Mortgage Loan [Member] 1290 Avenue Of Americas Mortgage Loan Land SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount Retirement Plan Name [Axis] Retirement Plan Name [Axis] Multiemployer plan, period contributions Multiemployer Plan, Employer Contribution, Cost 555 California Street, California Five Five Five California Street [Member] Domain member used to indicate facts reported for the continuing operations of 555 California Street. Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Net income per common share (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Schedule of Derivative Assets at Fair Value Schedule of Derivative Assets at Fair Value [Table Text Block] Special distribution (as a percent) Special Distribution, Percent Special Distribution, Percent Deferred leasing costs, net of accumulated amortization of $233,448 and $268,532 Deferred Leasing And Financing Costs Net Of Accumulated Amortization This element represents costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction. This element is net of accumulated amortization, combined with, for an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Various Mortgage Loans Various Mortgage Loans [Member] Various Mortgage Loans Award Date [Axis] Award Date [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Domain] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Domain] Schedule of Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Variable rate Variable Rate [Member] Variable Rate [Member] Schedule of Derivative Liabilities at Fair Value Schedule of Derivative Liabilities at Fair Value [Table Text Block] 623 Fifth Avenue 623 Fifth Avenue [Member] 623 Fifth Avenue Interest and Debt Expense [Abstract] Interest and Debt Expense [Abstract] Affiliated Entity Affiliated Entity [Member] Non-Recourse Mortgage Loan, Maturity Default Non-Recourse Mortgage Loan, Maturity Default [Member] Non-Recourse Mortgage Loan, Maturity Default Schedule of Impairment Losses, Transaction Related Costs and Other Schedule of Transaction Related Costs, Impairment Losses and Other [Table Text Block] Schedule of Transaction Related Costs, Impairment Losses and Other [Table Text Block] Revolving Credit Facility Maturing April 2029 Revolving Credit Facility Maturing April 2029 [Member] Revolving Credit Facility Maturing April 2029 Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Redeemable Noncontrolling Interest, by Legal Entity [Table] Redeemable Noncontrolling Interest [Table] Consolidated VIEs Variable Interest Entity, Primary Beneficiary [Member] Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Capital Units by Class [Axis] Capital Units by Class [Axis] Investments in partially owned entities Payments to Acquire Equity Method Investments Share-based compensation expense Share-Based Payment Arrangement, Expense Hedging Designation [Domain] Hedging Designation [Domain] Development costs and construction in progress Payments to Develop Real Estate Assets BMS cleaning fees Building Maintenance Service [Member] Building services provided by whole-owned subsidiary. Total liabilities, redeemable noncontrolling interests / partnership units and equity Liabilities and Equity Antidilutive Securities Excluded From Computation Of Earnings Per Share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Under employees' share option plan (in shares) Stock Issued During Period, Shares, Employee Stock Ownership Plan Fair value conversion ratio Redeemable Noncontrolling Interest, Fair Value Conversion Ratio Redeemable Noncontrolling Interest, Fair Value Conversion Ratio Share-based compensation expense Share-Based Payment Arrangement, Expense, after Tax Schedule of Equity Method Investments [Table] Equity Method Investment [Table] One Park Avenue One Park Avenue [Member] One Park Avenue Accounting Policies [Abstract] Accounting Policies [Abstract] Vornado deductible, percentage of property value Registrant Deductible Percentage Of Property Value Vornado deductible, percentage of property value Schedule of Future Lease Payments Due Under Operating Ground Leases Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Vested in period, fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Pay vs Performance Disclosure [Line Items] Lease liabilities Operating Lease, Liability Income (loss) from real estate fund investments Income (Loss) From Real Estate Fund Investments This element represents the income (loss) from the Real Estate Fund before allocation to noncontrolling interests Preferred stock, liquidation preference (in dollars per share/unit) Preferred Stock, Liquidation Preference Per Share Depreciation and amortization expense Depreciation, Depletion and Amortization, Nonproduction Real Estate Real Estate, Policy [Policy Text Block] Mandatorily redeemable instruments (included in other liabilities) Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Fair Value of Shares Net income attributable to redeemable partnership units Net Income (Loss) Attributable To Redeemable Operating Partnership Units Net Income (Loss) Attributable To Redeemable Operating Partnership Units Auditor [Line Items] Auditor [Line Items] Capital contributions Other Ownership Interests, Contributed Capital Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Acquisitions and Dispositions [Table] Acquisitions and Dispositions [Table] Acquisitions and Dispositions [Table] Percentage Through April 2029 Percentage Through April 2029 [Member] Percentage For First Five Years [Member] Excess of investee's carrying amount over equity in net assets Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Other Identified Intangible Assets Other Identified Intangible Assets [Member] Other Identified Intangible Assets [Member] SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward] SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward] Schedule of Variable Interest Entities [Table] Variable Interest Entity [Table] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three Comprehensive income (loss) attributable to Vornado / Vornado Realty L.P. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Expired (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Class A Units Owned by Vornado Class A Units Owned By Vornado [Member] Common Share [Line Items] Class of Stock [Line Items] Unsecured Debt Unsecured term loan Unsecured Debt [Member] Fee and other income Fee And Other Income [Member] Fee And Other Income [Member] Trade shows Trade Shows [Member] Trade Shows [Member] Deferred leasing costs, net of accumulated amortization Deferred Leasing And Financing Costs Amortization For an unclassified balance sheet, the accumulated amortization, as of the reporting date, which represents the periodic charge to earnings of initial direct costs which have been deferred and are being allocated over the lease term in proportion to the recognition of rental income, combined with, for an unclassified balance sheet, the accumulated amortization, as of the reporting date, representing the periodic charge to earnings of deferred costs which are associated with debt obligations existing as of the end of the period. Long-term debt Long term debt Long-Term Debt Income Tax Contingency [Table] Income Tax Contingency [Table] Legal Entity [Axis] Legal Entity [Axis] Assets Assets Assets 2026 Finite-Lived Intangible Asset, Expected Amortization, Year One Gain on sales-type lease Sales-Type Lease, Gain (Loss) Sales-Type Lease, Gain (Loss) Add: NOI from partially owned entities Net Operating Income (Loss) from Equity Method Investments Net Operating Income (Loss) from Equity Method Investments Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Real Estate [Table] Real Estate [Table] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Common shares outstanding ratio to class A units ratio Common Shares Outstanding to Class A Units Ratio Common Shares Outstanding to Class A Units Ratio Geographical [Domain] Geographical [Domain] Sustainability Performance Metrics Sustainability Performance Metrics [Member] Sustainability Performance Metrics Income Taxes Income Tax, Policy [Policy Text Block] Mortgage, 606 Broadway Mortgage, 606 Broadway [Member] Mortgage, 606 Broadway Cash Flows from Operating Activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Receivable Type [Axis] Receivable Type [Axis] Share-Based Compensation Arrangement Benchmark [Domain] Share-Based Compensation Arrangement Benchmark [Domain] Share-Based Compensation Arrangement Benchmark [Domain] Depreciation expense SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation, Depreciation Expense Total Real estate, balance at beginning of period Real estate, balance at end of period Real Estate Investment Property, at Cost Deconsolidation of partially owned entity Noncontrolling Interest, Decrease from Deconsolidation Farley Building Farley Building [Member] Farley Building PPIC PPIC [Member] Penn Plaza Insurance Company', our wholly owned consolidated subsidiary, is acting as re-insurance with respect to a portion of earthquake insurance coverage and insurance with respect to coverage for acts of terrorism as defined by TRIPRA. Senior A-Note Senior A-Note [Member] Senior A-Note Excess of investee's fair value over carrying amount Equity Method Investment Fair Value In Excess Of Carrying Amount Equity Method Investment Fair Value In Excess Of Carrying Amount Variable Interest Entity Variable Interest Entity [Line Items] 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Four Unconsolidated & Consolidated VIEs Consolidation, Variable Interest Entity, Policy [Policy Text Block] Common shares, dividends (in dollars per share) Class A common shares, dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Reclassification of assets held for sale (included in "other assets") Transfer to Investments Lease revenues Lease Revenue [Member] Lease Revenue [Member] Amortization of interest rate cap premiums Amortization of Deferred Hedge Gains Level 2 Fair Value, Inputs, Level 2 [Member] Document Financial Statement Error Correction Document Financial Statement Error Correction [Flag] Vornado Realty Trust Vornado Realty Trust [Member] Vornado Realty Trust Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Third Anniversary Of The Grant Date Third Anniversary Of The Grant Date [Member] Third Anniversary Of The Grant Date Related Party Related Party [Member] Plan Name [Axis] Plan Name [Axis] 2030 Sales-Type and Direct Financing Leases, Payment to be Received, Year Five PEO PEO [Member] Fifth Avenue and Times Square JV Fifth Avenue and Times Square JV [Member] Fifth Avenue and Times Square JV [Member] Less net loss (income) attributable to noncontrolling interests in: Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest [Abstract] Other, net Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Other Net Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Other Gain Loss Net PENN 11 Eleven Penn Plaza [Member] New York Office Eleven Penn Plaza [Member] UNITED STATES UNITED STATES Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Earnings Less Than Distributions Retained Earnings [Member] Income Tax Authority [Axis] Income Tax Jurisdiction [Axis] The Farley Building Moynihan Office Building [Member] Moynihan Office Building [Member] Fourth Anniversary Of The Grant Date Fourth Anniversary Of The Grant Date [Member] Fourth Anniversary Of The Grant Date Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash and cash equivalents and restricted cash at beginning of period Cash and cash equivalents and restricted cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Interest rate swaps and caps, asset Fair Value Asset Derivative Asset Absolute Absolute [Member] Absolute Component [Member] LTIP Units LTIP Units [Member] LTIP Units Product and Service [Domain] Product and Service [Domain] Qualified Dividend Income Qualified Dividend Income [Member] Qualified Dividend Income 2027 Sales-Type and Direct Financing Leases, Payment to be Received, Year Two Net income Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 2028 Lessor, Operating Lease, Payment to be Received, Year Three LTPP Units LTPP Units LTPP Units [Member] LTPP Units Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total liabilities Liabilities, Fair Value Disclosure Derivative, notional amount Derivative, Notional Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Lease Component [Domain] Lease Component [Domain] Lease Component [Domain] Hotel Pennsylvania site (PENN 15) Hotel Pennsylvania site (PENN 15) [Member] Domain member used to indicate facts reported for the continuing operations of Hotel Pennsylvania. NBCR NBCR [Member] Amount of insurance coverage against damages to property caused by acts of terrorism including nuclear, biological, chemical and radiological acts as defined by TRIA. Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Total minimum lease payments Sales-Type and Direct Financing Leases, Payment to be Received Title of 12(g) Security Title of 12(g) Security City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Multiemployer Health Plans Multiemployer Plans, Healthcare Benefit [Member] Acquisitions Investment [Text Block] Lease fee percentage of rent one to ten years Lease Fee Percentage Of Rent One To Ten Years Percentage of rent receivable from related party for leasing services for the first ten years of the lease. Mortgages Payable Mortgages [Member] Buildings and improvements Buildings and Improvements, Gross Duration of performance measurement period Duration Of Performance Measurement Period The period of time during which the performance of the stock will be evaluated to calculate the earning of the stock based awards. Deferred tax liabilities Deferred Tax Liabilities, Net Cash Flows from Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Conversion of Series A preferred shares to common shares Conversion of Series A preferred units to common shares Conversion of Stock, Amount Converted General and administrative General and Administrative Expense Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Disease Coverage Disease Coverage [Member] Disease Coverage [Member] Options exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Exercisable, Equity Instruments Other than Options, Weighted Average Remaining Contractual Term Share-Based Compensation Arrangement by Share-Based Payment Award, Exercisable, Equity Instruments Other than Options, Weighted Average Remaining Contractual Term Related Party Transactions [Abstract] Related Party Transactions [Abstract] Insurance deductible Insurance Deductible Insurance Deductible Other liabilities Other Liabilities 650 Madison Avenue 650 Madison Avenue [Member] 650 Madison Avenue Amortization of discount on investments in U.S. Treasury bills Investment Income, Amortization of Discount Canal Street Condominium Units, Retail Units Canal Street Condominium Units, Retail Units [Member] Canal Street Condominium Units, Retail Units Chicago Chicago [Member] Domain member used to indicate facts reported for the continuing operations in Chicago Auditor Name Auditor Name Organization and Business Nature of Operations [Text Block] Annual amount Operating Lease, Liability, Annual Amount Operating Lease, Liability, Annual Amount Canal Street Condominium Units Canal Street Condominium Units [Member] Canal Street Condominium Units Net gain on sale of land Gains (Losses) on Sales of Investment Real Estate Deferred Compensation Plan Assets Deferred Compensation Plan Assets [Member] Deferred Compensation Plan Assets Real estate Decrease In Assets Resulting From Deconsolidation, Real Estate, Net Decrease In Assets Resulting From Deconsolidation, Real Estate, Net Supplemental Disclosure of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Net operating loss carryforwards, valuation allowance Operating Loss Carryforwards, Valuation Allowance Other Performance Measure, Amount Other Performance Measure, Amount Weighted- Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] 770 Broadway Seven Seven Zero Broadway [Member] New York Office 770 Broadway [Member] Future rent and fixed PILOT payments Income Taxes, Payment In Lieu Of Taxes And Future Rent Income Taxes, Payment In Lieu Of Taxes And Future Rent Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] 2026 Lessor, Operating Lease, Payment to be Received, Year One Related Party, Type [Domain] Related and Nonrelated Parties [Domain] Real Estate Real Estate [Member] Capitalized interest and debt expense Interest Costs Capitalized Adjustment Litigation Status [Axis] Litigation Status [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Vesting [Axis] Vesting [Axis] Distributions Redeemable Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Redeemable Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Entity [Domain] Entity [Domain] Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Investments in partially owned entities Carrying amount of investments in partially owned entities Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Cash payments for interest (excluding capitalized interest) and interest rate cap premiums Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Non-recourse Nonrecourse [Member] Right-of-use assets Operating Lease, Right-of-Use Asset Deferred compensation plan assets (included in restricted cash and other assets) Deferred Compensation Plan Assets Effective income tax reconciliation (as a percent) Effective Income Tax Rate Reconciliation, Percent Fixed rent expense Operating Lease, Cost 4 Union Square South Mortgage Loan 4 Union Square South Mortgage Loan [Member] 4 Union Square South Mortgage Loan Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Carrying Amount Reported Value Measurement [Member] Plan Name [Domain] Plan Name [Domain] Real Estate [Abstract] Real Estate [Abstract] Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Equity [Abstract] Equity [Abstract] Senior unsecured notes, net Senior Notes Contractual Obligation, Fiscal Year Maturity Schedule [Abstract] Contractual Obligation, Fiscal Year Maturity Schedule [Abstract] Schedule of Interest and Other Investment Income, Net Interest and Other Income [Table Text Block] Segment Information Segment Reporting Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Not Designated as a Hedge Not Designated as Hedging Instrument [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] B-Note B-Note [Member] B-Note Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Change in fair value of consolidated interest rate hedges and other Increase (Decrease) in Accumulated Other Comprehensive Loss Due to Change in Fair Value of Interest Rate Hedges Increase (Decrease) in Accumulated Other Comprehensive Loss Due to Change in Fair Value of Interest Rate Hedges Amortization of intangible assets Amortization of Intangible Assets Loans Receivable Loans Receivable [Member] Taxable income distributed (as a percent) Percentage Of Taxable Income Distributed This element describes the percentage of taxable income that the company has distributed to its shareholders as dividends. Preferred stock, annual dividend/ distribution (in dollars per share) Preferred Stock, Dividend Rate, Per-Dollar-Amount Depreciation and amortization (including amortization of deferred financing costs) Depreciation, Depletion and Amortization Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest [Line Items] Acquisition costs Payments to Acquire Buildings Property management fee agreement percentage of income (as a percent) Property Management Fee Agreement Percentage Of Income Percentage of income from property, received from the related party as property management fees. Schedule of Activity of Redeemable Noncontrolling Interests Summary Of Activity Of Redeemable Noncontrolling Interests [Table Text Block] Summary Of Activity Of Redeemable Noncontrolling Interests [Text Block] Out Performance Plan 2021 Out Performance Plan 2021 [Member] Out Performance Plan 2021 AO LTIP Units AO LTIP Units [Member] AO LTIP Units [Member] Amortization of interest rate cap premiums Amortization of Interest Rate Cap Premiums Amortization of Interest Rate Cap Premiums Convertible securities (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Unsecured Term Loan October 2026 through August 2027 Unsecured Term Loan Expiring August 2027 [Member] Unsecured Term Loan Expiring August 2027 Arrangement Duration Trading Arrangement Duration Performance AO LTIP Units Performance Conditioned Appreciation Only Long Term Incentive Plan Units [Member] Performance Conditioned Appreciation Only Long Term Incentive Plan Units Net investment in lease Net investment in lease Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss 5.40% Series L Series L Preferred Stock [Member] 5.40% Series L Cumulative Redeemable Preferred Stock [Member] Segments [Axis] Segments [Axis] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Share price (in dollars per share) Share Price Other equity method investments Other Other equity method investments [Member] Other equity method investments Thereafter Long-Term Debt, Maturity, after Year Five Stock-based Compensation Share-Based Payment Arrangement [Text Block] Repurchase of common shares (in shares) Repurchase of Class A units owned by Vornado (in shares) Stock Repurchased and Retired During Period, Shares 595 Madison Avenue Five Nine Five Madison Avenue [Member] New York Office 595 Madison Avenue [Member] ASSETS Assets [Abstract] Estimated taxable income net Estimated Taxable Income Net Estimated taxable income after reconciliation for tax differences Underlying Security Market Price Change Underlying Security Market Price Change, Percent Debt Instrument [Axis] Debt Instrument [Axis] Fair Value Measurements Fair Value Disclosures [Text Block] Net gain on early extinguishment of debt Gain on extinguishment of debt Gain (Loss) on Extinguishment of Debt Shareholders' equity: Partners' equity: Equity, Attributable to Parent [Abstract] Award vesting rights (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Lease Component [Axis] Lease Component [Axis] Lease Component Shares repurchased, value Treasury Stock, Value, Acquired, Cost Method Vornado Vornado [Member] Vornado Stated rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Investment, Name [Axis] Investment, Name [Axis] Number of transactions Asset Acquisition, Number of Transactions Asset Acquisition, Number of Transactions Real Estate Properties [Domain] Real Estate Properties [Domain] Entity Voluntary Filers Entity Voluntary Filers Earthquake California Properties Earthquake California Properties [Member] Amount of insurance coverage against damages to property caused by earthquakes in California. 5.25% Series N Series N Preferred Stock [Member] Series N Preferred Stock Intangible Assets, Net (Excluding Goodwill) [Abstract] Intangible Assets, Net (Excluding Goodwill) [Abstract] Land Land Schedule of Interest And Debt Expense Interest And Debt Expense [Table Text Block] The schedule of interest and debt expense on secured and unsecured debt Other Other Segment [Member] Other Member including eliminations, non-core business related activities. Tenant and other receivables Accounts Receivable, after Allowance for Credit Loss Entity Registrant Name Entity Registrant Name Retirement Plan Name [Domain] Retirement Plan Name [Domain] Outstanding partnership units held by third parties (in shares) Units outstanding (in shares) Temporary Equity, Shares Outstanding Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Total THE MART Total Merchandise Mart [Member] Merchandise Mart Total Merchandise Mart [Member] Related party transaction annual fee percentage Property Management Fee, Percent Fee Weighted average units outstanding (in shares) Denominator for basic income per Class A unit – weighted average units (in shares) Weighted Average Limited Partnership Units Outstanding, Basic Senior Unsecured Notes Due 2025 Senior Unsecured Notes Due 2025 [Member] Senior Unsecured Notes Due 2025 350 Park Avenue Three Five Zero Park Avenue [Member] New York 350 Park Avenue [Member] Parking revenues Parking Revenue [Member] Parking Revenue 4.45% Series O Series O Preferred Stock [Member] Series O Preferred Stock Total assets Assets, Fair Value Disclosure Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Related Party, Type [Axis] Related and Nonrelated Parties [Axis] Gain on sales-type lease Sales-type Lease, Selling Profit (Loss) Schedule of Identified Intangible Assets and Intangible Liabilities Schedule of Finite-Lived Intangible Assets [Table Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Multiemployer Benefit Plans Multiemployer Plan [Line Items] Deferred compensation shares and options Deferred compensation units and options Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture 150 West 34th Street One Five Zero West 34th Street [Member] 150 West 34th Street property. Other financing activity, net Proceeds from (Payment for) Other Financing Activity Name Trading Arrangement, Individual Name Upon redemption of Class A units, at redemption value Upon redemption of redeemable Class A units, at redemption value Stock Issued During Period, Value, Conversion of Units Schedule of Changes in Fair Value of Deferred Compensation Plan Assets Schedule of Changes in Fair Value of Plan Assets [Table Text Block] Pier 94 Pier 94 [Member] Pier 94 New York City Metropolitan Area New York City Metropolitan Area [Member] Domain member used to indicate facts reported for the New York Office Segment. Real estate basis difference, carrying amount Real Estate Basis Difference, Carrying Amount Real Estate Basis Difference, Carrying Amount Redemption of Class A units for Vornado common shares, at redemption value Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Debt amount Debt Instrument, Face Amount 770 Broadway Mortgage Loan A770 Broadway Mortgage Loan [Member] A770 Broadway Mortgage Loan Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Operating Deduct: operating expenses Operating Costs and Expenses Unsecured Revolving Credit Facility, Maturing December 2027 Unsecured Revolving Credit Facility, Maturing December 2027 [Member] Unsecured Revolving Credit Facility, Maturing December 2027 Number of renewal options Lessee, Operating Lease, Number Of Renewal Terms Lessee, Operating Lease, Number Of Renewal Terms Preferred Shares Preferred Units Preferred Stock [Member] Percentage of affiliated entity owned by company Percentage of Affiliated Entity Owned By Company Percentage of Alexanders Owned By Company Name Awards Close in Time to MNPI Disclosures, Individual Name Outstanding, Weighted average grant date fair value at December 31 , 2024 (in dollars per share) Outstanding, Weighted average grant date fair value at December 31 , 2025 (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Construction commitment Other Commitment Not Full Value Awards Not Full Value Awards [Member] Consolidated subsidiaries Consolidated subsidiaries Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Lease liabilities Decrease In Assets Resulting From Deconsolidation, Lease Liabilities Decrease In Assets Resulting From Deconsolidation, Lease Liabilities Cash equivalents, carrying amount Cash Equivalents, at Carrying Value Management fee income Equity Method Investment Development Fees Equity Method Investment Development Fees Class A units - 16,650,713 and 16,850,803 units outstanding Class A units held by third parties Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount Operating Lease, Variable Component One Operating Lease, Variable Component One [Member] Operating Lease, Variable Component One Rate Type [Domain] Rate Type [Domain] Rate Type [Domain] Auditor Firm ID Auditor Firm ID Segments [Domain] Segments [Domain] Decrease in assets and liabilities resulting from the deconsolidation of Pier 94: Decrease In Assets And Liabilities Resulting From The Deconsolidation Of Pier 94 [Abstract] Decrease In Assets And Liabilities Resulting From The Deconsolidation Of Pier 94 100 West 33rd Street Mortgage Loan 100 West 33rd Street Mortgage Loan [Member] 100 West 33rd Street Mortgage Loan Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] 888 Seventh Avenue Mortgage Loan 888 Seventh Avenue Mortgage Loan [Member] 888 Seventh Avenue Mortgage Loan Balance Sheet Location [Domain] Statement of Financial Position Location, Balance [Domain] Series D cumulative redeemable preferred units - 141,400 units outstanding Perpetual Preferred/Redeemable Preferred: Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount Performance AO LTIP Units Performance Conditioned AO LTIP Units [Member] Performance Conditioned AO LTIP Units [Member] 61 Ninth Avenue 61 Ninth Avenue [Member] 61 Ninth Avenue Revenue Recognition Revenue [Policy Text Block] Impairment losses and transaction related costs, net Transaction Related Costs, Impairment Losses and Other Transaction Related Costs, Impairment Losses and Other Sales-type lease, derecognized assets Sales-Type Lease, Derecognized Assets Sales-Type Lease, Derecognized Assets Preferred shares of beneficial interest: no par value per share; authorized 110,000,000 shares; issued and outstanding 48,788,450 and 48,789,180 shares Preferred shares of beneficial interest Preferred Stock, Value, Issued All Executive Categories All Executive Categories [Member] Common shares of beneficial interest: $0.04 par value per share; authorized 250,000,000 shares; issued and outstanding 190,666,367 and 190,846,580 shares Common Stock, Value, Issued Interest on loans receivable Interest and Fee Income, Loans and Leases 909 Third Avenue Nine Zero Nine Third Avenue [Member] New York Office 909 Third Avenue [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Title of Individual [Axis] Title and Position [Axis] Canal Street Condominium Units, Residential Units Canal Street Condominium Units, Residential Units [Member] Canal Street Condominium Units, Residential Units Commitments and contingencies Commitments and Contingencies Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Non- controlling Interests in Consolidated Subsidiaries Noncontrolling Interest [Member] 260 Eleventh Avenue Two Sixty Eleventh Avenue [Member] Property located at 260 11th Avenue, New York. Partially owned office buildings/land Partially owned office buildings Partially owned office buildings [Member] Partially Owned Office Buildings Partially Owned Entities Equity Method Investments [Policy Text Block] Equity method ownership percentage Interest Equity Method Investment, Ownership Percentage Thereafter Lessor, Operating Lease, Payment to be Received, after Year Five PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount INCOME PER COMMON SHARE - DILUTED: INCOME PER CLASS A UNIT - DILUTED: Earnings Per Share, Diluted [Abstract] Comparable FFO per Share Comparable FFO per Share [Member] Comparable FFO per Share Fee income recognized by equity method investees for building maintenance services Other Real Estate Revenue From Equity Method Investees Fee income for supervision of cleaning, engineering and security services as per agreement recognized during the period New York New York Segment [Member] Domain member used to indicate facts reported for the New York Office Segment. Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Scenario [Axis] Scenario [Axis] PENN 1 One Penn Plaza [Member] New York Office One Penn Plaza [Member] Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Component Type [Axis] Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Component Type [Axis] Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Component Type [Axis] Weighted-Average Remaining Amortization Period Share-based Compensation Arrangement by Share-based Payment Award, Unrecognized Compensation Expense, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Unrecognized Compensation Expense, Weighted Average Remaining Contractual Term Derivative Contract [Domain] Derivative Contract [Domain] Redeemable noncontrolling interests: Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract] Number of buildings Number of Buildings1 Number of Buildings1 Award requisite service period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period Mandatorily redeemable instruments (included in other liabilities) Mandatorily Redeemable Preferred Stock, Fair Value Disclosure Number of stories Real Estate Property, Number of Stories in Building Real Estate Property, Number of Stories in Building All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Awards expiration term Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Acquisitions of real estate and other Payments to Acquire Other Property, Plant, and Equipment Borgata Land, Atlantic City, NJ Borgata Land [Member] Other Properties Atlantic City NJ [Member] Reconciliation of Cash and Cash Equivalents and Restricted Cash: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Identified intangible liabilities (included in deferred revenue): Identified Intangible Liabilities [Abstract] Identified Intangible Liabilities [Abstract] Equity Method Investee Equity Method Investee [Member] Long-Term Capital Gain Long-Term Capital Gain [Member] Long-Term Capital Gain Redeemable Noncontrolling Interests Rollforward Redeemable Noncontrolling Interests Rollforward [Abstract] Derivative, basis spread on variable rate Derivative, Basis Spread on Variable Rate Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Write-off of fully depreciated assets Write Off Of Fully Amortized And Depreciated Assets This element represents the decrease in assets due to the write off of fully depreciated assets Geographical [Axis] Geographical [Axis] PENN 11 Mortgage Loan PENN 11 Mortgage Loan [Member] PENN 11 Mortgage Loan Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Preferred shares of beneficial interest: par value per share (in dollars per share) Preferred Stock, No Par Value All Risk And Rental Value All Risk And Rental Value [Member] Amount of all risk and rental value insurance coverage against damages to property. Leases Lessor, Operating Leases [Text Block] Area of real estate property Area of Real Estate Property, Buildable Square Footage Area of Real Estate Property, Buildable Square Footage Forecast Forecast [Member] Distributions and earnings allocated to unvested participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Proceeds from partial redemption of Fifth Avenue and Times Square JV preferred equity Proceeds From Partial Redemption Proceeds From Partial Redemption 3.25% D-17 Cumulative Redeemable Series D17 Cumulative Redeemable Preferred Unit [Member] Series D17 Cumulative Redeemable Preferred Unit [Member] Ordinary Income Ordinary Income [Member] Conversion Feature [Axis] Conversion Feature [Axis] Manhattan Manhattan [Member] Earnings Per Share [Abstract] Earnings Per Share [Abstract] 2030 Lessee, Operating Lease, Liability, to be Paid, Year Five Cap strike rate Derivative, Cap Interest Rate Conversion of Series A preferred shares to common shares (in shares) Conversion of Series A preferred units to common shares (in shares) Conversion of Stock, Shares Converted NOI from partially owned entities Net Operating Income (Loss) Cash Basis, Partially Owned Entities Net Operating Income (Loss) Cash Basis, Partially Owned Entities Residential Building Residential Building [Member] Residential Building Lessor, sales-type lease, term of contract Lessor, Sales-type Lease, Term of Contract Face amount, percent Debt Instrument, Face Amount, Percent Debt Instrument, Face Amount, Percent Proceeds from financing Proceeds from property refinancing Proceeds from Property Refinancing Proceeds from Property Refinancing Property management fee agreement price per square foot Property Management Fee Agreement Price Per Square Foot Amount per square foot received from related party as property management fee. Number of revolving credit facilities Debt Instrument, Number of Revolving Credit Facilities Debt Instrument, Number of Revolving Credit Facilities Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Shares repurchased (in shares) Treasury Stock, Shares, Acquired PENN 2 Two Penn Plaza New York Office Two Penn Plaza [Member] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Multiemployer Benefit Plans Multiemployer Plan [Text Block] Relative Relative [Member] Relative [Member] 4 Union Square South Four Union Square South [Member] 4 Union Square South [Member] Non-Recourse Loan Due 2030 Non-Recourse Loan Due 2030 [Member] Non-Recourse Loan Due 2030 Award Timing Disclosures [Line Items] Redeemable Noncontrolling Interests Redeemable Noncontrolling Interests [Text Block] Redeemable Noncontrolling Interests [Text Block] 137 West 33rd Street One Three Seven West 33rd Street [Member] One Three Seven West 33rd Street property. Measurement Frequency [Domain] Measurement Frequency [Domain] Lease term Lessee, Operating Lease, Renewal Term Real estate, at cost: Real Estate Investment Property, at Cost [Abstract] Shareholders' Equity/Partners' Capital Equity [Text Block] 888 Seventh Avenue Eight Eight Eight Seventh Avenue [Member] New York Office 888 Seventh Avenue [Member] Mortgage, 7 West 34th Street Mortgage, 7 West 34th Street [Member] Mortgage, 7 West 34th Street Net income attributable to Vornado/Vornado Realty L.P. Net income attributable to Vornado/Vornado Realty L.P. Net loss attributable to the entities Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Class A Unit Class A units held by third parties Capital Unit, Class A [Member] Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Pending Litigation Pending Litigation [Member] Real estate, net Real Estate Investment Property, Net Total SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross Carrying amount of investments in partially owned entities Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Liabilities Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Liabilities Fixed billings Operating Lease, Lease Income, Lease Payments Proceeds from repayment of participation in 150 West 34th Street mortgage loan Proceeds from Collection of Loans Receivable Performance vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Preferred shares of beneficial interest: authorized shares (in shares) Preferred shares of beneficial interest: authorized shares (in shares) Preferred Stock, Shares Authorized Repurchase of common shares Repurchase of Class A units owned by Vornado Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Number of other general partners Number Of Other General Partners Number Of Other General Partners Redeemable Preferred Stock Redeemable Preferred Stock [Member] Additions to real estate Additions to real estate Payments to Acquire Real Estate Earnings less than distributions Retained Earnings (Accumulated Deficit) Name of Property [Axis] Name of Property [Axis] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Debt Covenant [Domain] Debt Covenant [Domain] [Domain] for Debt Covenant [Axis] Capital Unit, Class [Domain] Capital Unit, Class [Domain] Annual lease payments Sales-Type Lease, Annual Lease Payments Sales-Type Lease, Annual Lease Payments Class of Stock [Axis] Class of Stock [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Multiemployer Plan Type [Axis] Retirement Plan Type [Axis] Statement [Table] Statement [Table] Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Operating Partnership Redeemable partnership units Other Comprehensive Income (Loss), Net Of Tax, Portion Attributable To Redeemable Partnership Units Other Comprehensive Income (Loss), Net Of Tax, Portion Attributable To Redeemable Partnership Units Cash Flows from Financing Activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] One Park Avenue Mortgage Loan One Park Avenue Mortgage Loan [Member] One Park Avenue Mortgage Loan Accumulated amortization Finite Lived Intangible Liability Accumulated Amortization The accumulated amount of amortization of a major finite-lived intangible liability class. A major class is composed of intangible liabilities that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. Redeemable Noncontrolling Partnership Units Redeemable Noncontrolling Interests [Policy Text Block] Redeemable Noncontrolling Interests Policy [Text Block] Income from partially owned entities Our share of net income (loss) Income from partially owned entities Income (Loss) From Equity Method Investments Including Fees Earned 4 Union Square South 4 Union Square South [Member] 4 Union Square South Schedule of Changes In Fair Value of Loans Receivable Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] 2023 Omnibus Share Plan 2023 Omnibus Share Plan [Member] 2023 Omnibus Share Plan All Adjustments to Compensation All Adjustments to Compensation [Member] Unsecured revolving credit facilities Unsecured Revolving Credit Facilities [Member] Unsecured Revolving Credit Facilities [Member] Amendment Flag Amendment Flag Closing share price (in dollars per share) Sale of Stock, Price Per Share Under employees' share option plan Stock Issued During Period, Value, Employee Stock Ownership Plan Number of shares available for future grants (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Proceeds from sale of condominium units and ancillary amenities at 220 Central Park South Proceeds from sale of real estate Net proceeds from sale of real estate Proceeds from Sale, Real Estate, Held-for-Investment 2026 Sales-Type and Direct Financing Leases, Payment to be Received, Year One Termination Date Trading Arrangement Termination Date Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] 537 West 26th Street Five Three Seven West 26th Street [Member] Five Three Seven West 26th Street [Member] Receivable [Domain] Receivable [Domain] 555 California Street, In Place Swap 555 California Street, In Place Swap [Member] 555 California Street, In Place Swap Tax Treatment of Dividend [Axis] Tax Treatment of Dividend [Axis] Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Schedule of Share Based Compensation Stock Options Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Investors Investors [Member] Investors [Member] Redeemable Class A unit measurement adjustment Adjustments To Reflect Redeemable Class Operating Partnership Units Adjustments to reflect redeemable Class A Operating Partnership units Weighted average shares outstanding (in shares) Denominator for basic income per common share - weighted average shares (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of Earnings Per Share Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Option exercisable at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Subsequent Events [Abstract] Segment Reporting [Abstract] Segment Reporting [Abstract] Rent expense Operating Lease, Expense Debt Disclosure [Abstract] Debt Disclosure [Abstract] Scenario [Domain] Scenario [Domain] Numerator for basic income per common share/Class A unit Undistributed Earnings (Loss) Available to Common Shareholders, Basic Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Number of properties unsold Number of Properties Unsold Number of Properties Unsold Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common shares of beneficial interest: par value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Consolidated Entities [Axis] Consolidated Entities [Axis] 220 Central Park South Two Two Zero Central Park South Site [Member] New York Manhattan 220 Central Park South Site [Member] Real estate impairment losses Net gain on sale Impairment of Real Estate 330 West 34th Street Three Three Zero West 34th Street [Member] New York Office 330 West 34th Street [Member] Paydowns Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Full Value Awards Full Value Awards [Member] Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Sales-type lease receivable Sales-type and Direct Financing Leases, Lease Receivable Net income per Class A unit (in dollars per unit) Diluted (in dollars per share) Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted Subsequent Events Subsequent Events [Text Block] Insider Trading Arrangements [Line Items] Other income Product and Service, Other [Member] Total liabilities Liabilities Liabilities Distributions to noncontrolling interests Distributions to redeemable security holders and noncontrolling interests in consolidated subsidiaries Payments of Ordinary Dividends, Noncontrolling Interest Facility fee (as a percent) Line of Credit Facility, Commitment Fee Percentage Initial investment in Sunset Pier 94 Joint Venture upon contribution of leasehold interest Contribution of Property Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Variable interest rate Derivative, Variable Interest Rate Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] PENN 1 PENN 1 [Member] PENN 1 Total contractual operating lease billings Operating Lease, Contractual Lease Income Operating Lease, Contractual Lease Income Counterparty Name [Axis] Counterparty Name [Axis] Consolidated subsidiaries Less net loss attributable to noncontrolling interests in consolidated subsidiaries Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, Nonredeemable Threshold level (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Threshold Level Share-based Compensation Arrangement by Share-based Payment Award, Threshold Level Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Office And Retail Building Office And Retail Building [Member] Office And Retail Building Non-NEOs Non-NEOs [Member]