Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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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=6382943&loc=d3e33918-111571

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- Definition

The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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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

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- 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 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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Cash received for the sale of real estate that is not part of an investing activity during the current period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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Balance Type:	debit
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- Definition

Debt Instrument Maturity Date (String)

+ References

No definition available.

+ Details

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Data Type:	invest:dateStringItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity Commitment Fund Term, in years

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The amount of excess fair value of investments over it's cost.

+ References

No definition available.

+ Details

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

- Definition

Investment Period Fund

+ References

No definition available.

+ Details

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Namespace Prefix:	vno_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The term of the extension available, in years

+ References

No definition available.

+ Details

Name:	vno_LengthOfExtensionAvailable
Namespace Prefix:	vno_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Investments Held By Fund during the year.

+ References

No definition available.

+ Details

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Namespace Prefix:	vno_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of partners

+ References

No definition available.

+ Details

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Namespace Prefix:	vno_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents the real estate assets related to the fund

+ References

No definition available.

+ Details

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

- Definition

Unfunded Commitments Of the Fund

+ References

No definition available.

+ Details

Name:	vno_UnfundedCommitmentsOfFund
Namespace Prefix:	vno_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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Real Estate Fund Investments (Narratives) (Details) $ in Thousands		3 Months Ended		9 Months Ended		35 Months Ended
	Jan. 20, 2015 USD ($) LimitedPartners	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Investments	Sep. 30, 2014 USD ($)	Mar. 25, 2015 USD ($)	Dec. 31, 2014 USD ($)
Investment Holdings [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)		$ 555,414		$ 555,414			$ 513,973
Mortgages payable (in US Dollars)		9,159,413		9,159,413			$ 8,263,165
Proceeds from sale of real estate				10,731
Crowne Plaza Time Square Hotel [Member]
Investment Holdings [Line Items]
Equity method ownership percentage	33.00%						11.00%
Real Estate Fund Joint Venture [Member] \| Crowne Plaza Time Square Hotel [Member]
Investment Holdings [Line Items]
Equity method ownership percentage	57.00%
Aggregate fair value of Real Estate Fund investments (in US Dollars)	$ 480,000
Mortgages payable (in US Dollars)	$ 310,000
Debt Instrument, Description of Variable Rate Basis	LIBOR
Spread Over LIBOR (in percentage)	2.80%
Debt Instrument Maturity	December 2018
Length Of Extension Available	1 year
Business Acquisition Cost Of Acquired Entity	$ 95,000
Real Estate Fund [Member]
Investment Holdings [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)		555,414		555,414
Net realized (loses) gains on exited investments		(907)	$ 51,584	$ 24,684	$ 126,653
Number Of Limited Partners \| LimitedPartners	1
Term of the Fund, years				8 years
Investment period for commitments of the Fund, years				3 years
Number Of Investments Held By Fund \| Investments				6
Excess of fair value over cost		190,620		$ 190,620
Unfunded Commitments Of Fund		102,212		102,212
Vornado Realty Trust [Member]
Investment Holdings [Line Items]
Unfunded Commitments Of Fund		$ 25,553		$ 25,553
Vornado Realty Trust [Member] \| Crowne Plaza Time Square Hotel [Member]
Investment Holdings [Line Items]
Business Acquisition Cost Of Acquired Entity	$ 39,000
Santa Monica Office 520 Broadway [Member] \| Real Estate Fund [Member]
Investment Holdings [Line Items]
Net realized (loses) gains on exited investments						$ 23,768
Proceeds from sale of real estate						$ 91,650