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Organization and Business (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2014
Jan. 15, 2015
Dec. 31, 2013
Properties
Dec. 31, 2012
Properties
Organization and Business [Abstract]        
Common limited partnership interest in the Operating Partnership 94.10%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest      
Toys R Us [Member]        
Real Estate Properties [Line Items]        
Equity method ownership percentage 32.60%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= vno_ToysRUsMember		      
Alexanders Inc [Member]        
Real Estate Properties [Line Items]        
Equity method ownership percentage 32.40%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= vno_AlexandersIncMember		      
Retail Segment Strip Shopping Centers [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties 22us-gaap_NumberOfRealEstateProperties
/ us-gaap_SubsegmentsAxis
= vno_RetailSegmentStripShoppingCentersMember		      
Number Of Real Estate Properties Sold 6vno_NumberOfRealEstatePropertiesSold
/ us-gaap_SubsegmentsAxis
= vno_RetailSegmentStripShoppingCentersMember		      
Subsequent Event [Member] | Toys R Us [Member]        
Real Estate Properties [Line Items]        
Equity method ownership percentage   32.60%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= vno_ToysRUsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Subsequent Event [Member] | Vornado Realty Trust [Member]        
Real Estate Properties [Line Items]        
Number of shares/units convered during spin off for 1 share of UE   2us-gaap_ConversionOfStockSharesConverted1
/ dei_LegalEntityAxis
= vno_VornadoRealtyTrustMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Subsequent Event [Member] | Urban Edge Properties [Member]        
Real Estate Properties [Line Items]        
Cash Considerations Transferred During Spin Off (in US Dollars)   225vno_CashConsiderationsTransferredDuringSpinOff
/ dei_LegalEntityAxis
= vno_UrbanEdgePropertiesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Partnership Units received during spin off   5,712,000us-gaap_TemporaryEquitySharesOutstanding
/ dei_LegalEntityAxis
= vno_UrbanEdgePropertiesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Duration Of Administrative Services   2 years    
Number of new shares issued during spin off for every 2 shares/units of Vornado and Vornado L.P.   1us-gaap_ConversionOfStockSharesIssued1
/ dei_LegalEntityAxis
= vno_UrbanEdgePropertiesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Equity method ownership percentage   5.40%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= vno_UrbanEdgePropertiesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Subsequent Event [Member] | Urban Edge Properties [Member] | Retail Segment Strip Shopping Centers [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties   79us-gaap_NumberOfRealEstateProperties
/ dei_LegalEntityAxis
= vno_UrbanEdgePropertiesMember
/ us-gaap_SubsegmentsAxis
= vno_RetailSegmentStripShoppingCentersMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Subsequent Event [Member] | Urban Edge Properties [Member] | Retail Segment Regional Malls [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties   3us-gaap_NumberOfRealEstateProperties
/ dei_LegalEntityAxis
= vno_UrbanEdgePropertiesMember
/ us-gaap_SubsegmentsAxis
= vno_RetailSegmentRegionalMallsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Subsequent Event [Member] | Vornado Realty L.P. [Member]        
Real Estate Properties [Line Items]        
Number of shares/units convered during spin off for 1 share of UE   2us-gaap_ConversionOfStockSharesConverted1
/ dei_LegalEntityAxis
= vno_VornadoRealtyLpMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Real Estate Fund [Member] | Subsequent Event [Member]        
Real Estate Properties [Line Items]        
Equity method ownership percentage   25.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= us-gaap_RealEstateFundsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
New York Segment [Member] | Subsequent Event [Member] | Alexanders Inc [Member]        
Real Estate Properties [Line Items]        
Equity method ownership percentage   32.40%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= vno_AlexandersIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_NewYorkSegmentMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
New York Segment [Member] | New York City Metropolitan Area [Member] | Subsequent Event [Member] | Alexanders Inc [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties   6us-gaap_NumberOfRealEstateProperties
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= vno_AlexandersIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_NewYorkSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_NewYorkCityMetropolitanAreaMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
New York Segment [Member] | New York City Metropolitan Area [Member] | Lexington Avenue 731 [Member] | Subsequent Event [Member]        
Real Estate Properties [Line Items]        
Square Footage Of Real Estate Property   1,300,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vno_LexingtonAvenue731Member
/ us-gaap_StatementBusinessSegmentsAxis
= vno_NewYorkSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_NewYorkCityMetropolitanAreaMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Retail Properties Segment [Member] | Retail Segment Strip Shopping Centers [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties Sold     12vno_NumberOfRealEstatePropertiesSold
/ us-gaap_StatementBusinessSegmentsAxis
= vno_RetailPropertiesSegmentMember
/ us-gaap_SubsegmentsAxis
= vno_RetailSegmentStripShoppingCentersMember		 12vno_NumberOfRealEstatePropertiesSold
/ us-gaap_StatementBusinessSegmentsAxis
= vno_RetailPropertiesSegmentMember
/ us-gaap_SubsegmentsAxis
= vno_RetailSegmentStripShoppingCentersMember
Warehouse [Member] | Subsequent Event [Member] | Urban Edge Properties [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties   1us-gaap_NumberOfRealEstateProperties
/ dei_LegalEntityAxis
= vno_UrbanEdgePropertiesMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_WarehouseMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Office Building [Member] | San Francisco [Member] | Other Properties 555 California Street [Member] | Subsequent Event [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties   3us-gaap_NumberOfRealEstateProperties
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OfficeBuildingMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vno_OtherProperties555CaliforniaStreetMember
/ us-gaap_StatementGeographicalAxis
= vno_SanFranciscoMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Square Footage Of Real Estate Property   1,800,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OfficeBuildingMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vno_OtherProperties555CaliforniaStreetMember
/ us-gaap_StatementGeographicalAxis
= vno_SanFranciscoMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Contolling Interest In Real Estate Properties Percent   70.00%vno_ContollingInterestInRealEstatePropertiesPercent
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OfficeBuildingMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vno_OtherProperties555CaliforniaStreetMember
/ us-gaap_StatementGeographicalAxis
= vno_SanFranciscoMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Office Building [Member] | New York Segment [Member] | Manhattan [Member] | Subsequent Event [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties   31us-gaap_NumberOfRealEstateProperties
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OfficeBuildingMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_NewYorkSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_ManhattanMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Square Footage Of Real Estate Property   20,100,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OfficeBuildingMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_NewYorkSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_ManhattanMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Office Building [Member] | Washington DC Segment [Member] | Washington Dc Northern Virginia [Member] | Subsequent Event [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties   59us-gaap_NumberOfRealEstateProperties
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OfficeBuildingMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_WashingtonDcSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_WashingtonDcNorthernVirginiaMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Square Footage Of Real Estate Property   16,100,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OfficeBuildingMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_WashingtonDcSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_WashingtonDcNorthernVirginiaMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Retail Properties [Member] | New York Segment [Member] | Manhattan [Member] | Subsequent Event [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties   56us-gaap_NumberOfRealEstateProperties
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= vno_RetailPropertiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_NewYorkSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_ManhattanMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Square Footage Of Real Estate Property   2,500,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= vno_RetailPropertiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_NewYorkSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_ManhattanMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Merchandise Mart Properties [Member] | Merchandise Mart IL Chicago [Member] | Subsequent Event [Member]        
Real Estate Properties [Line Items]        
Square Footage Of Real Estate Property   3,600,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= vno_MerchandiseMartPropertiesMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vno_MerchandiseMartILChicagoMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Other Real Estate And Related Investments [Member] | New York Segment [Member] | Manhattan [Member] | Hotel Pennsylvania [Member] | Subsequent Event [Member]        
Real Estate Properties [Line Items]        
Number of Units in Real Estate Property (in number of residential units)/ (in number of rooms)   1,700us-gaap_NumberOfUnitsInRealEstateProperty
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vno_HotelPennsylvaniaMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_NewYorkSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_ManhattanMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Residential Properties [Member] | New York Segment [Member] | Manhattan [Member] | Subsequent Event [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties   4us-gaap_NumberOfRealEstateProperties
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= vno_ResidentialPropertiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_NewYorkSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_ManhattanMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Number of Units in Real Estate Property (in number of residential units)/ (in number of rooms)   1,654us-gaap_NumberOfUnitsInRealEstateProperty
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= vno_ResidentialPropertiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_NewYorkSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_ManhattanMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Residential Properties [Member] | Washington DC Segment [Member] | Washington Dc Northern Virginia [Member] | Subsequent Event [Member]        
Real Estate Properties [Line Items]        
Number Of Real Estate Properties   7us-gaap_NumberOfRealEstateProperties
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= vno_ResidentialPropertiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_WashingtonDcSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_WashingtonDcNorthernVirginiaMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		    
Number of Units in Real Estate Property (in number of residential units)/ (in number of rooms)   2,414us-gaap_NumberOfUnitsInRealEstateProperty
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= vno_ResidentialPropertiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= vno_WashingtonDcSegmentMember
/ us-gaap_StatementGeographicalAxis
= vno_WashingtonDcNorthernVirginiaMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember