Area of a real estate property.

No definition available.

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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=6382943&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_NotesAndLoansPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

- Definition

Latest date the outstanding debt instruments are required to be repaid (string).

+ References

No definition available.

+ Details

Name:	vno_DebtInstrumentMaturityDateRangeEndString
Namespace Prefix:	vno_
Data Type:	invest:dateStringItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents additional invesement made by the company to increase the ownership percentage in investee.

+ References

No definition available.

+ Details

Name:	vno_EquityMethodInvestmentOwnershipAdditionalInvestment
Namespace Prefix:	vno_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Estimated total cost for proposed development.

+ References

No definition available.

+ Details

Name:	vno_EstimatedDevelopmentCost
Namespace Prefix:	vno_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents Joint Venture Partnership Percent.

+ References

No definition available.

+ Details

Name:	vno_JointVenturePartnershipPercent
Namespace Prefix:	vno_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the real estate assets related to the fund

+ References

No definition available.

+ Details

Name:	vno_RealEstateFundNondepreciableRealEstate
Namespace Prefix:	vno_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Investments in Partially Owned Entities (One Park Avenue and 61 Ninth Avenue) (Details) (USD $)			0 Months Ended			0 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Jun. 26, 2014 One Park Avenue [Member]	Jun. 26, 2014 One Park Avenue [Member] Vornado Realty Trust [Member]	Dec. 31, 2013 One Park Avenue [Member] Vornado Realty Trust [Member]	Jul. 23, 2014 Sixty One Ninth Avenue Property [Member] sqft
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership, Additional Investment				$ 22,700,000
Equity method ownership percentage			45.00%	55.00%	46.50%
Aggregate fair value of Real Estate Fund investments (in US Dollars)	495,392,000	667,710,000	560,000,000
Mortgages payable (in US Dollars)	9,273,212,000	8,331,993,000	250,000,000
Interest Rate, End of Period (in percentage)			4.995%
Maturity Date End			March 2016
Joint Venture Partnership Percent						50.10%
Lease expiration term						99 years
Square Footage Of Real Estate Property						130,000
Estimated Development Cost						$ 125,000,000