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

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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))
-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 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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Definition

Debt Instrument, Extension Term

+ References

No definition available.

+ Details

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

- Definition

Debt Instrument Maturity Date in YYYY-MM format.

+ References

No definition available.

+ Details

Name:	vno_DebtInstrumentMaturityYearMonth
Namespace Prefix:	vno_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Extension Executed On Number Of Revolving Credit Facility

+ References

No definition available.

+ Details

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

- 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

- Definition

Number Of Revolving Credit Facility

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vno_MaturinginJanuary2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vno_MaturinginFebruary2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Event (Narrative) (Details) $ in Thousands	Oct. 17, 2017 USD ($) myExtension credit_facility	Oct. 16, 2017	Jul. 17, 2017	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Subsequent Events
Unsecured revolving credit facilities \| $				$ 0	$ 115,630
LIBOR
Subsequent Events
Spread Over LIBOR (in percentage)			1.25%
Maturing in January 2022 \| LIBOR \| Revolving Credit Facility \| Subsequent Event
Subsequent Events
Facility fee (basis points)	0.20%
Maturing in January 2022 \| Line of Credit \| Subsequent Event
Subsequent Events
Extension executed on number of revolving credit facilities \| myExtension	1
Number of revolving credit facility \| credit_facility	2
Debt instrument maturity	2022-01	2019-11
Maturing in January 2022 \| Line of Credit \| Revolving Credit Facility \| Subsequent Event
Subsequent Events
Unsecured revolving credit facilities \| $	$ 1,250,000
Number of loan extensions available \| myExtension	2
Length of extension available	6 months
Maturing in January 2022 \| Line of Credit \| LIBOR \| Revolving Credit Facility \| Subsequent Event
Subsequent Events
Description of variable rate basis	LIBOR
Spread Over LIBOR (in percentage)	1.00%	1.05%
Maturing in February 2021 \| Line of Credit \| Revolving Credit Facility \| Subsequent Event
Subsequent Events
Unsecured revolving credit facilities \| $	$ 1,250,000
Number of loan extensions available \| myExtension	2
Length of extension available	6 months