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

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: 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

Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

+ Details

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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

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

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

- Definition

The cash inflow from a debt initially having maturity 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 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Debt Instrument Maturity Date (String)

+ References

No definition available.

+ Details

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Namespace Prefix:	vno_
Data Type:	invest:dateStringItemType
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

Amount of debt refinanced

+ References

No definition available.

+ Details

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

- Definition

Number Of Apartment Buildings

+ References

No definition available.

+ Details

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

- Definition

The total number of term extensions available to the borrower

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=vno_WashingtonDcOfficeRiverHouseApartmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=us-gaap_FirstMortgageMember
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Balance Type:
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- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=us-gaap_SecondMortgageMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=vno_NotesAndMortgagesPayableFixedRateMember
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- Details

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- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=vno_NewYork150West34thStreetMember
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- Details

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Namespace Prefix:
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- Details

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- Details

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Debt (Narratives) (Details) - Subsequent Event Type [Domain] - Real Estate Properties [Domain] - Entity [Domain]		1 Months Ended		6 Months Ended
	Jun. 02, 2015 USD ($) Extensions	Apr. 30, 2015 USD ($) Properties ResidentialUnits	Jan. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Proceeds from borrowings				$ 1,746,460,000	$ 1,398,285,000
Mortgages payable (in US Dollars)				$ 8,562,314,000		$ 8,263,165,000
Washington DC River House Apartments [Member]
Debt Instrument [Line Items]
Notes And Loans Payable Refinanced Amount (in US Dollars)		$ 308,000,000
Number Of Apartment Buildings \| Properties		3
Number Of Units \| ResidentialUnits		1,670
Debt Instrument, Description of Variable Rate Basis		LIBOR
Spread Over LIBOR (in percentage)		1.28%
Debt Instrument Maturity		2025
Proceeds from borrowings		$ 43,000,000
Washington DC River House Apartments [Member] \| Mortgages Maturing April 2015 [Member]
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)				5.43%
Debt Instrument Maturity				April 2015
Mortgages payable (in US Dollars)				$ 195,000,000
Washington DC River House Apartments [Member] \| Mortgages Maturing 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis				LIBOR
Spread Over LIBOR (in percentage)				1.53%
Debt Instrument Maturity				2018
Mortgages payable (in US Dollars)				$ 64,000,000
Notes And Mortgages Payable Fixed Rate [Member]
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)				4.43%
Mortgages payable (in US Dollars)				$ 6,349,878,000		6,499,396,000
Notes And Mortgages Payable Variable Rate [Member]
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)				2.16%
Mortgages payable (in US Dollars)				$ 2,212,436,000		$ 1,763,769,000
Notes And Mortgages Payable Variable Rate [Member] \| 150 West 34th Street [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR
Spread Over LIBOR (in percentage)	2.25%
Debt Instrument Maturity	2018
Mortgages payable (in US Dollars)	$ 205,000,000
Number Of Extensions Available \| Extensions	2
Length Of Extension Available	1 year
Total Notes And Mortgages Payable [Member]
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)				3.85%
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)				3.68%
Senior Unsecured Notes 4.25% [Member]
Debt Instrument [Line Items]
Redemption of senior unsecured notes			$ 500,000,000
Interest Rate, End of Period (in percentage)			4.25%
Debt Instrument, Maturity Date			Apr. 01, 2015
Redemption Price, Percentage of Principal Amount Redeemed			100.00%
Unsecured Revolving Credit Facilities [Member]
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)				1.24%