XML 24 R46.htm IDEA: XBRL DOCUMENT v2.4.1.9

Real Estate (Details 2) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended
	Apr. 30, 2015	Mar. 31, 2015	Mar. 31, 2014
Properties acquired	1eqr_PropertiesAcquired	0eqr_PropertiesAcquired
Property Units Acquired	202eqr_PropertyUnitsAcquired	0eqr_PropertyUnitsAcquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 130,300us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	$ 5,968us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Disposed Properties	1eqr_DisposedProperties	3eqr_DisposedProperties
Disposed Units	314eqr_DisposedUnits	550eqr_DisposedUnits
Proceeds From Sale Of Property	49,600eqr_ProceedsFromSaleOfProperty	145,400eqr_ProceedsFromSaleOfProperty
Net gain on sales of real estate properties		79,951us-gaap_GainsLossesOnSalesOfInvestmentRealEstate	0us-gaap_GainsLossesOnSalesOfInvestmentRealEstate
Consolidated Rental Properties [Member]
Disposed Properties		3eqr_DisposedProperties / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = eqr_ConsolidatedRentalPropertiesMember
Disposed Units		550eqr_DisposedUnits / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = eqr_ConsolidatedRentalPropertiesMember
Proceeds From Sale Of Property		145,400eqr_ProceedsFromSaleOfProperty / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = eqr_ConsolidatedRentalPropertiesMember
Land [Member]
Land parcels acquired		1eqr_LandParcelsAcquired / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_LandMember
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		$ 5,968us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_LandMember

X

- Definition

The total number of rental properties that the Company disposed of to unaffiliated parties during the period.

+ References

No definition available.

+ Details

Name:	eqr_DisposedProperties
Namespace Prefix:	eqr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Total number of rental units associated with rental properties that the company disposed of to unaffiliated third parties during the period.

+ References

No definition available.

+ Details

Name:	eqr_DisposedUnits
Namespace Prefix:	eqr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Total number of land parcel or parcels acquired from unaffiliated third parties during the period.

+ References

No definition available.

+ Details

Name:	eqr_LandParcelsAcquired
Namespace Prefix:	eqr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cash inflow from the sale of real estate investment property.

+ References

No definition available.

+ Details

Name:	eqr_ProceedsFromSaleOfProperty
Namespace Prefix:	eqr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Total number of property or properties acquired from unaffiliated third parties during the period.

+ References

No definition available.

+ Details

Name:	eqr_PropertiesAcquired
Namespace Prefix:	eqr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Total number of units associated with the property or properties acquired from unaffiliated third parties during the period.

+ References

No definition available.

+ Details

Name:	eqr_PropertyUnitsAcquired
Namespace Prefix:	eqr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of assets acquired at the acquisition date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.14(d))

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 14

-Subparagraph d

-Article 9

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis=us-gaap_LandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: