Area of a real estate property.

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RealEstatePropertiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Distribution Made to Joint Venture Unit Distribution

+ References

No definition available.

+ Details

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Namespace Prefix:	vno_
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Organization and Business (Narratives) (Details) ft² in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2016	Dec. 31, 2016 ft² ResidentialUnits Properties Rooms
Organization and Business
Common limited partnership interest in the Operating Partnership		93.70%
Real estate fund investments
Real Estate Properties
Equity method ownership percentage		25.00%
Toys R Us
Real Estate Properties
Equity method ownership percentage		32.50%
Alexanders Inc
Real Estate Properties
Equity method ownership percentage		32.40%
New York \| New York City Metropolitan Area \| Lexington Avenue 731
Real Estate Properties
Square Footage Of Real Estate Property		1.3
New York \| Manhattan \| Office
Real Estate Properties
Square Footage Of Real Estate Property		20.2
Number Of Real Estate Properties \| Properties		36
New York \| Manhattan \| Retail
Real Estate Properties
Square Footage Of Real Estate Property		2.7
Number Of Real Estate Properties \| Properties		70
New York \| Manhattan \| Residential Properties
Real Estate Properties
Number Of Real Estate Properties \| Properties		12
Number of Units in Real Estate Property (in number of residential units) \| ResidentialUnits		2,004
New York \| Manhattan \| Hotel Pennsylvania
Real Estate Properties
Number of Units in Real Estate Property (in number of residential units) \| Rooms		1,700
New York \| Alexanders Inc \| New York City Metropolitan Area
Real Estate Properties
Number Of Real Estate Properties \| Properties		7
Equity method ownership percentage		32.40%
New York \| Alexanders Inc \| New York City Metropolitan Area \| Lexington Avenue 731
Real Estate Properties
Square Footage Of Real Estate Property		1.3
Washington DC
Real Estate Properties
Pro rata basis of distribution	1:2
Washington DC \| Office
Real Estate Properties
Square Footage Of Real Estate Property		11.1
Number Of Real Estate Properties \| Properties		44
Washington DC \| Residential Properties
Real Estate Properties
Number Of Real Estate Properties \| Properties		3,156
Number of Units in Real Estate Property (in number of residential units) \| ResidentialUnits		9
Other \| San Francisco \| 555 California Street \| Office
Real Estate Properties
Square Footage Of Real Estate Property		1.8
Equity method ownership percentage		70.00%
Other \| Chicago \| the Mart, Chicago
Real Estate Properties
Square Footage Of Real Estate Property		3.7
Other \| Toys R Us
Real Estate Properties
Equity method ownership percentage		32.50%
Other \| Toys R Us \| Real estate fund investments
Real Estate Properties
Equity method ownership percentage		25.00%