Identified intangible assets, net of accumulated amortization Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Proceeds from sale of property Proceeds from Sale, Property, Held-for-Sale Award Timing Predetermined Award Timing Predetermined [Flag] Class A Units Class A Units [Member] Class A Units (LOSS) INCOME PER CLASS A UNIT - DILUTED: Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted [Abstract] Entity File Number Entity File Number Additional Capital Additional Paid-in Capital [Member] Tabular List, Table Tabular List [Table Text Block] 2023 Share Repurchase Program 2023 Share Repurchase Program [Member] 2023 Share Repurchase Program Unsecured Term Loan Expiring 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] Long-Term Performance Award 2023 Long-Term Performance Award 2023 [Member] Long-Term Performance Award 2023 Realized and unrealized gains 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] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Revenue Recognition Revenue from Contract with Customer [Text Block] Alexander's Alexanders Inc [Member] Alexanders Inc Dividends paid on preferred shares Distributions to preferred unitholders Payments of Ordinary Dividends, Preferred Stock and Preference Stock Schedule of Stock by Class [Table] Stock, Class of Stock [Table] JV Corporate Joint Venture [Member] 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 Other assets Increase (Decrease) in Other Operating Assets Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Notional amount and swapped balance Derivative Asset, Notional Amount Total, net Finite Lived Intangible Liabilities Net The aggregate sum of gross carrying value of a major finite-lived intangible liability 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 Employee Stock Option Share-Based Payment Arrangement, Option [Member] Revolving Credit Facility, 2031 Revolving Credit Facility, 2031 [Member] Revolving Credit Facility, 2031 Cash payments for income taxes Cash payments for income taxes Income Taxes Paid Total shareholders' / partners' equity Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Other comprehensive income (loss): 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] Unsecured Debt Senior unsecured notes Senior Unsecured Notes [Member] Senior Unsecured Notes [Member] LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY Liabilities and Equity [Abstract] 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] 3 East 54th Street 3 East 54th Street [Member] 3 East 54th Street Farley Office and Retail Farley Office and Retail Building [Member] Farley Office and Retail Building [Member] Identified intangible assets, net of accumulated amortization of $83,758 and $81,962 Total, net Finite-Lived Intangible Assets, Net 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 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] 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) income 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] (Loss) income before income taxes (Loss) 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] 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 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] Percentage share of mortgage loan Debt Instrument, Ownership Percentage Debt Instrument, Ownership Percentage Less comprehensive 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] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Award Timing Method Award Timing Method [Text Block] Award Type [Axis] Award Type [Axis] Schedule of Common and Preferred Shares/Units Schedule of Dividends Payable [Table Text Block] Investment, Name [Domain] Investment, Name [Domain] Operating Lease, Variable Component Two Operating Lease, Variable Component Two [Member] Operating Lease, Variable Component Two Entity Trading Symbol Trading Symbol Entity Address, City or Town Entity Address, City or Town Receivable [Axis] Loan Receivable [Axis] Loan Receivable Identified Intangible Assets and Liabilities Intangible Assets Disclosure [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount 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 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] 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 Common shares of beneficial interest: outstanding shares (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Insurance [Abstract] Insurance [Abstract] Chief Executive Officer Chief Executive Officer [Member] Schedule of Revenues by Segment Disaggregation of Revenue [Table Text Block] Operating Partnership Operating Partnership [Member] Operating Partnership [Member] 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] Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Weighted average interest rate Weighted Average Interest Rate 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 (Benefit) Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Other assets Other Assets Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 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 Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Change in fair value of consolidated interest rate hedges and other Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Unsecured term loan Unsecured term loan Unsecured Term Loan [Member] Unsecured Term Loan 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). Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] 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 Class of Treasury Stock [Table] Class of Treasury Stock [Table] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [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 Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Subsequent Event Subsequent Event [Member] Schedule Of Equity Method Investments Schedule of Equity Method Investments [Line Items] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] 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] 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 Mortgages payable, net Loans payable Total, net Loans Payable Variable Interest Entities ("VIEs") Variable Interest Entity Disclosure [Text Block] Entity Address, State or Province Entity Address, State or Province Numerator for diluted (loss) 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] Loans receivable (included in other liabilities and other assets) Loans Receivable, Fair Value Disclosure Weighted average units outstanding, diluted (in shares) Denominator for diluted (loss) 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 Revenue [Member] Rental Revenue [Member] Individual: Individual [Axis] Other, net Other Net Attributable To Redeemable Noncontrolling Interest Other Net Attributable To Redeemable Noncontrolling Interest Entities [Table] Entities [Table] 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 Contributions from noncontrolling interests in consolidated subsidiaries Proceeds from Noncontrolling Interests 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 Entity Interactive Data Current Entity Interactive Data Current Distributions of capital from partially owned entities Distributions Of Capital From Partially Owned Entities Distributions Of Capital From Partially Owned Entities Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Ownership [Domain] Ownership [Domain] Net loss attributable to nonredeemable noncontrolling interests in consolidated subsidiaries Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest Entity Central Index Key Entity Central Index Key PEO Name PEO Name Total revenues 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 [Line Items] 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 Long-Term Performance Award March 2030 Long-Term Performance Award March 2030 [Member] Long-Term Performance Award March 2030 Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount 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] Office Office Building [Member] Exercise Price Award Exercise Price 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 Subsequent Event Type [Axis] Subsequent Event Type [Axis] Balance Sheet Location [Axis] Statement of Financial Position Location, Balance [Axis] Note Financing Receivable, before Allowance for Credit Loss 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 AOCI Attributable to Parent [Member] Total redeemable noncontrolling interests Beginning balance Ending balance Redeemable Noncontrolling Interest, Equity, Carrying Amount Ownership [Axis] Ownership [Axis] Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Transaction related costs and other Transaction related costs 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 (LOSS) INCOME PER CLASS A UNIT - BASIC: (LOSS) INCOME PER COMMON SHARE/CLASS A UNIT: Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax [Abstract] 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 Title and Position [Domain] Title and Position [Domain] Mortgage, Park Avenue Plaza Mortgage, Park Avenue Plaza [Member] Mortgage, Park Avenue Plaza Fixed rate Fixed Rate [Member] Fixed Rate [Member] Impact of assumed conversion of dilutive convertible securities Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities Document Quarterly Report Document Quarterly Report Debt, carrying amount Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Investments, All Other Investments [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] 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 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 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] Preferred stock dividend rate Preferred Stock, Dividend Rate, Percentage Derivative, noncontrolling interest Derivative, Notional Amount, Attributable To Noncontrolling Interest Derivative, Notional Amount, Attributable To Noncontrolling Interest Unswapped Balance Derivative Liability, Notional Amount 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] 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 Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Straight-lining of rents Straight Line Rent Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Senior Unsecured Notes Due 2033 Senior Unsecured Notes Due 2033 [Member] Senior Unsecured Notes Due 2033 Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] 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] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Debt Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Collateral Held [Domain] Collateral Held [Domain] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Tenant services Tenant Services [Member] Tenant Services [Member] Weighted average shares outstanding (in shares) Denominator for diluted (loss) 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 Common shares issued upon redemption of Class A units, at redemption value (in shares) Class A units issued to Vornado 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] Derivative [Table] Derivative [Table] Additional default stated rate (as a percent) Debt Instrument, Default Interest Rate, Stated Percentage Debt Instrument, Default Interest Rate, Stated Percentage Entity Small Business Entity Small Business Organization [Table] Organization [Table] Organization [Table] Operating Partnership Net (loss) income Net Income (Loss) Attributable to Redeemable Noncontrolling Interest 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] 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 Stock, Shares Outstanding Document Transition Report Document Transition Report Interest expense Interest Costs Incurred Other comprehensive income (loss) of nonconsolidated subsidiaries Other Comprehensive Income (Loss), Nonconsolidated Subsidiaries, after Tax Other Comprehensive Income (Loss), Nonconsolidated Subsidiaries, after Tax Other Commitments [Abstract] Other Commitments [Abstract] Underlying Securities Award Underlying Securities Amount 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 Common Class A Common Class A [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] 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 Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] (Loss) 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] Revenue Revenue from Contract with Customer, Excluding Assessed Tax Litigation Status [Domain] Litigation Status [Domain] 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 Terrorism Acts Terrorism Acts [Member] Terrorism Acts [Member] Income (expense) 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 (up to) Share Repurchase Program, Authorized, Amount All-In Swapped Rate Derivative, Fixed Interest Rate Net (loss) income per Class A unit (in dollars per unit) Basic (in dollars per unit) Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net income (loss) attributable to common shareholders/Class A unitholders Net Income (Loss) Available to Common Stockholders, Basic Common shares issued: Common Shares Issued [Abstract] Entity Information [Line Items] Entity Information [Line Items] Share Repurchase Program [Domain] Share Repurchase Program [Domain] 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 Total expenses Operating Expenses 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 common shares/class A units per share/unit) Preferred Stock, Redemption Price Per Share Net (loss) income per common share (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Non-Cash Information: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] 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] Unsecured Term Loan Expiring July 2027 Unsecured Term Loan Expiring July 2027 [Member] Unsecured Term Loan Expiring July 2027 Investments, Debt and Equity Securities [Abstract] Unconsolidated VIEs Variable Interest Entity, Not Primary Beneficiary [Member] Prepaid assets Increase (Decrease) in Prepaid Expense Investments in Partially Owned Entities Equity Method Investments and Joint Ventures Disclosure [Text Block] 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 Other Stockholders' Equity, Other 825 Seventh Avenue Office Condominium 825 Seventh Avenue Office Condominium [Member] 825 Seventh Avenue Office Condominium Debt Covenant [Axis] Debt Covenant [Axis] Debt Covenant [Axis] Receivable [Domain] Loan Receivable [Domain] Loan Receivable [Domain] Long-term debt, gross Long-Term Debt, Gross 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 Schedule of Components of Lease Revenues Operating Lease, Lease Income [Table Text Block] Expiration Date Trading Arrangement Expiration Date Recourse Status [Axis] Recourse Status [Axis] Other liabilities Increase (Decrease) in Other Operating Liabilities 85 Tenth Avenue Eight Five Tenth Avenue [Member] Eight Five Tenth Avenue [Member] 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 Series A Preferred Stock Series A Preferred Stock [Member] Entity Current Reporting Status Entity Current Reporting Status Derivative [Line Items] Derivative [Line Items] 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] 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 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. Common limited partnership interest in the operating partnership (as percent) 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] Interest rate swaps and caps, liability Fair Value Liability Derivative Liability Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] 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 Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Park Avenue Plaza Park Avenue Plaza [Member] Park Avenue Plaza 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 Rate Type [Axis] Rate Type [Axis] Rate Type [Axis] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] 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 costs Amortization of Debt Issuance Costs 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] Common shares of beneficial interest: issued shares (in shares) Common Stock, Shares, Issued Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Lease revenues Lease revenues Operating Lease, Lease Income Loss Contingencies 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 Series M Preferred Stock [Member] Series M Preferred Stock [Member] Accrued capital expenditures included in accounts payable and accrued expenses 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 10 for dividends per share amounts) Distributions to preferred unitholders (see Note 10 for distributions per unit amounts) Dividends, Preferred Stock 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] 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 Events 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 Stock Common Shares Common Stock [Member] 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 Real Estate [Domain] Real Estate [Domain] Asset Class [Axis] Asset Class [Axis] Interest Rate Swaps Interest Rate Swap [Member] Deferred financing costs Payments of Financing Costs 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 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 (LOSS) INCOME PER COMMON SHARE - BASIC: (LOSS) INCOME PER COMMON SHARE/CLASS A UNIT: Earnings Per Share, Basic [Abstract] 1290 Avenue of the Americas mortgage loan A1290 Avenue Of Americas Mortgage Loan [Member] A1290 Avenue Of Americas Mortgage Loan Retirement Plan Name [Axis] Retirement Plan Name [Axis] 555 California Street 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 (loss) 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] Preferred stock, dividend rate, per-dollar-amount (in dollars per share) Preferred Stock, Dividends Per Share, Declared Deferred leasing costs, net of accumulated amortization of $237,704 and $233,448 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 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] Interest and Debt Expense [Abstract] Interest and Debt Expense [Abstract] 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] Redeemable Noncontrolling Interest Operating Partnership Units Series Type [Axis] Capital Units by Class [Axis] Kenneth C. Griffin (KG) Kenneth C. Griffin (KG) [Member] Kenneth C. Griffin (KG) 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] Under employees' share option plan (in shares) Under Vornado's 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 Schedule of Equity Method Investments [Table] Equity Method Investment [Table] One Park Avenue One Park Avenue [Member] One Park Avenue Registrant deductible percentage of property value Registrant Deductible Percentage Of Property Value Vornado deductible, percentage of property value Pay vs Performance Disclosure [Line Items] Lease liabilities Operating Lease, Liability Income 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 per share (in dollars per share/unit) Preferred Stock, Liquidation Preference Per Share Depreciation and amortization Depreciation and amortization expense Depreciation, Depletion and Amortization, Nonproduction Mandatorily redeemable instruments (included in other liabilities) Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Fair Value of Shares Net loss (income) attributable to redeemable partnership units Net Income (Loss) Attributable To Redeemable Operating Partnership Units Net Income (Loss) Attributable To Redeemable Operating Partnership Units 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] 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] 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 Comprehensive income attributable to Vornado / Vornado Realty L.P. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Class A Units Owned by Vornado Class A Units Owned By Vornado [Member] Class of Stock [Line Items] Class of Stock [Line Items] 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, 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 defease Long term debt Long term debt Long-Term Debt Legal Entity [Axis] Legal Entity [Axis] Assets Assets Assets Add: NOI from partially owned entities Net Operating Income (Loss) from Equity Method Investments Net Operating Income (Loss) from Equity Method Investments 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 Cash Flows from Operating Activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Receivable Type [Axis] Receivable Type [Axis] Total Real Estate Investment Property, at Cost 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. 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 Entities Variable Interest Entity [Line Items] Common shares, dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Unconsolidated & Consolidated VIEs Consolidation, Variable Interest Entity, Policy [Policy Text Block] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding 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] Vornado Realty Trust Vornado Realty Trust [Member] Vornado Realty Trust Basis of Presentation [Abstract] Basis of Presentation [Abstract] Basis of Presentation [Abstract] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Related Party Related Party [Member] PEO PEO [Member] Fifth Avenue and Times Square JV 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 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] Earnings Less Than Distributions Retained Earnings [Member] 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 and cash equivalents and restricted cash 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 Organization [Line Items] Organization [Line Items] [Line Items] for Organization [Table] Product and Service [Domain] Product and Service [Domain] Net (loss) income Net (loss) income Net (loss) income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 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 Real estate investment, price per square foot (in dollars per square foot) Real Estate Investment, Price Per Square Foot Real Estate Investment, Price Per Square Foot 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] NBCR Acts 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] City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Acquisitions Investment [Text Block] 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. Cash Flows from Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] General and administrative General and administrative expense General and Administrative Expense Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net rent per annum Proceeds From Rent Payments, Annual Amount Proceeds From Rent Payments, Annual Amount Disease Coverage Disease Coverage [Member] Disease Coverage [Member] Insurance deductible Insurance Deductible Insurance Deductible Other liabilities Other Liabilities Organization Nature of Operations [Text Block] 350 Park Avenue 350 Park Avenue [Member] 350 Park Avenue Annual amount Operating Lease, Liability, Annual Amount Operating Lease, Liability, Annual Amount Net gain on sale Gains (Losses) on Sales of Investment Real Estate Deferred Compensation Plan Assets Deferred Compensation Plan Assets [Member] Deferred Compensation Plan Assets Supplemental Disclosure of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Other Performance Measure, Amount Other Performance Measure, Amount Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Related Party [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] 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 (used in) provided by 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 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] Nonrecourse 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 Carrying Amount Reported Value Measurement [Member] Real estate investment, rentable square footage (in square feet) Real Estate Investment, Rentable Square Footage Real Estate Investment, Rentable Square Footage REVENUES: Real Estate [Abstract] Equity [Abstract] Equity [Abstract] Senior unsecured notes, net Senior Notes Schedule of Interest and Other Investment Income, Net Interest and Other Income [Table Text Block] Segment Information Segment Reporting Disclosure [Text Block] Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis 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] 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 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] 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 Expiring August 2027 Unsecured Term Loan Expiring August 2027 [Member] Unsecured Term Loan Expiring August 2027 Arrangement Duration Trading Arrangement Duration Net investment in lease Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss 5.40% Series L Series L Preferred Stock 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] Other investments Other equity method investments [Member] Other equity method investments 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 ASSETS Assets [Abstract] Proceeds from debt Proceeds from Issuance of Unsecured Debt 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] Shareholders' equity: Partners' equity: Equity, Attributable to Parent [Abstract] Vesting percentage 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 Stated rate (in percent) Debt Instrument, Interest Rate, Stated Percentage Investment, Name [Axis] Investment, Name [Axis] 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 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) Temporary Equity, Shares Outstanding Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Weighted average units outstanding, basic (in shares) Denominator for basic (loss) income per Class A unit - weighted average units (in shares) Weighted Average Limited Partnership Units Outstanding, Basic Parking revenues Parking Revenue [Member] Parking Revenue 4.45% Series O Series O Preferred Stock Series O Preferred Stock [Member] Series O Preferred Stock Total assets Assets, Fair Value Disclosure Related Party [Axis] Related and Nonrelated Parties [Axis] Schedule of Identified Intangible Assets and Intangible Liabilities Schedule of Finite-Lived Intangible Assets [Table Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Other financing activity, net Proceeds from (Payment for) Other Financing Activity Name Trading Arrangement, Individual Name Common shares issued upon redemption of Class A units, at redemption value Class A units issued to Vornado 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] 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 Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Operating Deduct: operating expenses Operating Costs and Expenses Number of renewal options Lessee, Operating Lease, Number Of Renewal Terms Lessee, Operating Lease, Number Of Renewal Terms Unsecured Revolving Credit Facility, Maturing December 2027 Unsecured Revolving Credit Facility, Maturing December 2027 [Member] Unsecured Revolving Credit Facility, Maturing December 2027 Share Repurchase Program [Axis] Share Repurchase Program [Axis] Preferred Shares Preferred Stock Preferred Stock [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Construction commitment Other Commitment Consolidated subsidiaries Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Cash equivalents, carrying amount Cash Equivalents, at Carrying Value All Other Employees All Other Employees [Member] All Other Employees Class A units - 16,946,794 and 16,650,713 units outstanding Redemption value of redeemable class A units 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] Segments [Domain] Segments [Domain] 100 West 33rd Street mortgage loan A100 West 33rd Street Mortgage Loan [Member] A100 West 33rd Street Mortgage Loan Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Balance Sheet Location [Domain] Statement of Financial Position Location, Balance [Domain] Series D cumulative redeemable preferred units - 141,400 units outstanding 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 Preferred shares of beneficial interest: no par value per share; authorized 110,000,000 shares; issued and outstanding 48,788,450 shares 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 188,097,756 and 190,666,367 shares Common Stock, Value, Issued Interest on loans receivable Interest and Fee Income, Loans and Leases Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Title and Position [Axis] Title and Position [Axis] Commitments and contingencies Commitments and Contingencies Long-Term Performance Award March 2029 Long-Term Performance Award March 2029 [Member] Long-Term Performance Award March 2029 Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Non-controlling Interests in Consolidated Subsidiaries Noncontrolling Interest [Member] Partially owned office buildings/land Partially owned office buildings Partially owned office buildings [Member] Partially Owned Office Buildings Equity method ownership percentage Interest Equity Method Investment, Ownership Percentage Recently Issued Accounting Literature Accounting Standards Update and Change in Accounting Principle [Text Block] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount (LOSS) INCOME PER COMMON SHARE - DILUTED: Earnings Per Share, Diluted [Abstract] 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] 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] Derivative Contract [Domain] Derivative Contract [Domain] Redeemable noncontrolling interests: Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract] Number of stories Real Estate Property, Number of Stories in Building Real Estate Property, Number of Stories in Building Mandatorily redeemable instruments (included in other liabilities) Mandatorily Redeemable Preferred Stock, Fair Value Disclosure 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 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] Acquisitions of real estate and other Payments to Acquire Other Property, Plant, and Equipment 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 other liabilities): Identified Intangible Liabilities [Abstract] Identified Intangible Liabilities [Abstract] Equity Method Investee Equity Method Investee [Member] Redeemable Noncontrolling Interests Rollforward Redeemable Noncontrolling Interests Rollforward [Abstract] Derivative, basis spread on variable rate Derivative, Basis Spread on Variable Rate Net gain on sale Gain (Loss) on Sale of Properties 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 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. 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 Conversion Feature [Axis] Conversion Feature [Axis] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Cap strike rate Derivative, Cap Interest Rate NOI from partially owned entities Net Operating Income (Loss) Cash Basis, Partially Owned Entities Net Operating Income (Loss) Cash Basis, Partially Owned Entities Subsidiary, ownership percentage, parent Subsidiary, Ownership Percentage, Parent Fisher Brothers Fisher Brothers [Member] Fisher Brothers Face amount, percent Debt Instrument, Face Amount, Percent Debt Instrument, Face Amount, Percent 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 Number of revolving credit facilities Debt Instrument, Number of Revolving Credit Facilities Debt Instrument, Number of Revolving Credit Facilities Relative Relative [Member] Relative [Member] Award Timing Disclosures [Line Items] Redeemable Noncontrolling Interests Redeemable Noncontrolling Interests [Text Block] Redeemable Noncontrolling Interests [Text Block] 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] Mortgage, 7 West 34th Street Mortgage, 7 West 34th Street [Member] Mortgage, 7 West 34th Street Net (loss) income attributable to Vornado Net (loss) income attributable to Vornado/Vornado Realty L.P. Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Class A Unit Capital Unit, Class A [Member] Pending Litigation Pending Litigation [Member] Real estate, net Real Estate Investment Property, Net 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 loan receivable Proceeds from Collection of Loans Receivable Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Segment Information Segment Reporting Information [Line Items] 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 Term Lessee, Operating Lease, Term of Contract Redeemable Preferred Stock Redeemable Preferred Stock [Member] 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] Schedule of Stock-Based Compensation Expense Share-Based Payment Arrangement, Cost by Plan [Table Text Block] 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] Redeemable Noncontrolling Interest Operating Partnership Units Series Type [Domain] Capital Unit, Class [Domain] 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] Statement [Table] Statement [Table] Adjustments to reconcile net (loss) 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 Interests 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 Income (Loss) From Equity Method Investments, Including Fees Earned Schedule of Changes In Fair Value of Loans Receivable Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] 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 Under Vornado's employees' share option plan Stock Issued During Period, Value, Employee Stock Ownership Plan Proceeds from sale of condominium units and ancillary amenities at 220 Central Park South Proceeds from Sale, Real Estate, Held-for-Investment Termination Date Trading Arrangement Termination Date Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Receivable [Domain] Receivable [Domain] 555 California Street, In Place Swap 555 California Street, In Place Swap [Member] 555 California Street, In Place Swap 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 (loss) 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] Financial Assets And Liabilities Not Measured At Fair Value Financial Assets And Liabilities Not Measured At Fair Value [Abstract] Subsequent Events [Abstract] Subsequent Events [Abstract] Segment Reporting [Abstract] Segment Reporting [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Scenario [Domain] Scenario [Domain] Numerator for basic (loss) 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 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] Other, net Interest and Other Investment Income, Other Net Interest and Other Investment Income, Other Net Repayments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Net (loss) income per Class A unit (in dollars per unit) Diluted (in dollars per unit) 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 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] Other (in shares) Stockholders' Equity, Other Shares 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 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]