EQR


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
dei:LegalEntity

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic
dei:LegalEntity

us-gaap:EarningsPerShareDiluted
dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTax
dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity

us-gaap:CostsAndExpenses
dei:LegalEntity

us-gaap:GeneralAndAdministrativeExpense
dei:LegalEntity

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
dei:LegalEntity

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity

us-gaap:IncomeTaxExpenseBenefit
dei:LegalEntity

us-gaap:IncomeTaxesPaidNet
dei:LegalEntity

us-gaap:InterestExpenseDebt
dei:LegalEntity

us-gaap:InterestPaidNet
dei:LegalEntity

us-gaap:NetIncomeLoss
dei:LegalEntity
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted
us-gaap:StatementBusinessSegments
us-gaap:OperatingExpenses
us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

us-gaap:OperatingIncomeLoss
dei:LegalEntity
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossNetOfTax
dei:LegalEntity

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:ProfitLoss
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:Assets

us-gaap:Liabilities
dei:LegalEntity
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
dei:LegalEntity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CashAndCashEquivalentsAtCarryingValue
dei:LegalEntity

us-gaap:Land
dei:LegalEntity

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
dei:LegalEntity

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:OtherAssets
dei:LegalEntity

us-gaap:LongTermDebt

us-gaap:MinorityInterest
us-gaap:StatementEquityComponents

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
dei:LegalEntity

us-gaap:MinorityInterest
us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInInvestingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity

us-gaap:AmortizationOfFinancingCosts
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:NetIncomeLoss
dei:LegalEntity
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ShareBasedCompensation
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInInvestingActivities
dei:LegalEntity

us-gaap:PaymentsToAcquireRealEstate
dei:LegalEntity
us-gaap:SubsequentEventType

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity

us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:PaymentsOfDividendsCommonStock
dei:LegalEntity
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
eqr:AdjustmentForLimitedPartnersOwnershipInOperatingPartnership
us-gaap:StatementEquityComponents
eqr:AdjustmentToAdditionalPaidInCapitalAndNoncontrollingOwnershipInterest
us-gaap:StatementEquityComponents
eqr:AdjustmentToAdditionalPaidInCapitalResultingFromConversionOfCapitalUnits

eqr:AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:AmortizationOfDeferredFinancingCosts
dei:LegalEntity

eqr:AmortizationOfDeferredFinancingCostsInvestmentInRealEstateNet
dei:LegalEntity

eqr:AmortizationOfDeferredFinancingCostsMortgageNotesPayableNet
dei:LegalEntity

eqr:AmortizationOfDeferredFinancingCostsNetMortgageNotesPayableNet
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

eqr:AmortizationOfDeferredFinancingCostsNotesNet
dei:LegalEntity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
eqr:AmortizationOfDeferredFinancingCostsNotesPayableNet

eqr:AmortizationOfDeferredFinancingCostsOtherAssets
dei:LegalEntity

eqr:AmortizationOfDeferredSettlementsOnDerivativeInstrumentsOtherLiabilities
dei:LegalEntity

eqr:AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable
dei:LegalEntity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

eqr:AmortizationOfDiscountsAndPremiumsOnDebtNotesNet
dei:LegalEntity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:StatementEquityComponents
eqr:AnnualDividendPerPreferredSharePreferenceUnit
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
eqr:ChangeInCarryingValueOfRedeemableLimitedPartners

eqr:CostOfPropertyManagement
dei:LegalEntity

eqr:DebtFinancingCostsMortgageNotesPayableNet
dei:LegalEntity

eqr:DebtFinancingCostsOtherAssets
dei:LegalEntity
us-gaap:TypeOfArrangement
eqr:DecreaseInRentalRevenues

eqr:DilutiveOpUnits

eqr:DilutiveSecuritiesOptions
dei:LegalEntity
dei:LegalEntity
eqr:DividendsPreferenceUnits
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
eqr:ExchangeOfOPUnitsBetweenLimitedPartnerAndGeneralPartner

eqr:GainLossOnSalesOfLandParcels
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
eqr:GeneralPartnerDistribution

eqr:IncomeLossFromEquityMethodInvestmentsMerger
dei:LegalEntity

eqr:IncreaseDecreaseInLeaseLiabilities
dei:LegalEntity

eqr:InitialMeasurementAndReclassificationsLeaseLiabilities
dei:LegalEntity

eqr:InitialMeasurementAndReclassificationsRightOfUseAssets
dei:LegalEntity

eqr:InvestmentsInUnconsolidatedEntities
dei:LegalEntity

eqr:InvestmentsInUnconsolidatedEntitiesOtherLiabilities
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
eqr:IssuanceOfLongTermIncentivePlanUnitsIntoNoncontrollingInterest
us-gaap:StatementEquityComponents

eqr:LimitedPartnersChangeInCarryingValue

eqr:LimitedPartnersChangeInRedemptionValue
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
eqr:LimitedPartnersRedemptions

eqr:MinorityInterestChangeInCarryingValue
us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
eqr:MinorityInterestIncreaseFromContributionsByNoncontrollingInterestsPartiallyOwnedProperties
us-gaap:StatementEquityComponents

eqr:MortgageNotesPayableLumpSumPayOffs
dei:LegalEntity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
dei:LegalEntity
eqr:NetIncomeLossAvailableToOpUnitholdersBasicDilutedNumerator

eqr:NonRealEstateCapitalAdditions
dei:LegalEntity

eqr:OperatingAndFinanceLeaseRightOfUseAssetAmortization
dei:LegalEntity
us-gaap:TypeOfArrangement
eqr:OperatingLeaseLeaseIncomeBadDebtNet

eqr:OperatingLeaseLeaseIncomeLoss
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:TypeOfArrangement
us-gaap:TypeOfArrangement

eqr:OtherLiabilitiesLossFromInvestmentsInUnconsolidatedEntitiesMerger
dei:LegalEntity

eqr:PaymentsForCapitalExpendituresToRealEstate
dei:LegalEntity

eqr:PaymentsOfInterestCapitalizedForRealEstateUnderDevelopment
dei:LegalEntity

eqr:PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments
us-gaap:TypeOfArrangement
eqr:PercentageOfRentalIncome
us-gaap:CreditFacility
eqr:PercentagePointsOfLineOfCreditFacilityCommitmentFee
us-gaap:StatementEquityComponents
eqr:PreferredStockPreferenceUnitsDividendRatePercentage

eqr:ProceedsFromSaleOfProperty
us-gaap:PropertyPlantAndEquipmentByType

eqr:RemainingAmountOfAlternativeMinimumTaxRefundReceived

eqr:RepaymentsOfMortgageNotesPayable
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
eqr:SupplementalExecutiveRetirementPlanSerp
us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
eqr:UnitsLimitedPartnersDistributions

eqr:UnrealizedGainLossOnDerivativeInstrumentsOtherLiabilities
dei:LegalEntity

eqr:WriteOffOfPursuitCostsAccountsPayableAndAccruedExpenses
dei:LegalEntity

eqr:WriteOffOfPursuitCostsOtherAssets
dei:LegalEntity
us-gaap:UnusualRiskOrUncertaintyByNature
eqr:WriteOffOfStraightLineRentReceivables

eqr:WriteOffPursuitCostsInvestmentInRealEstate
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition
us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition
us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition
us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfAboveAndBelowMarketLeases
dei:LegalEntity

us-gaap:AmortizationOfDebtDiscountPremium
dei:LegalEntity

us-gaap:AmortizationOfDeferredHedgeGains
dei:LegalEntity

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:ConcentrationRiskByBenchmark, us-gaap:TypeOfArrangement
us-gaap:ConcentrationRiskPercentage1

us-gaap:CostOfPropertyRepairsAndMaintenance
dei:LegalEntity
us-gaap:StatementBusinessSegments
us-gaap:CreditFacility
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

us-gaap:Depreciation
dei:LegalEntity

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
us-gaap:DerivativeInstrumentRisk

us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid
dei:LegalEntity
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:DistributionsPerLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasic
us-gaap:StatementEquityComponents
us-gaap:DividendsCommonStockCash

us-gaap:DividendsPreferredStock
us-gaap:StatementEquityComponents
us-gaap:DividendsPreferredStockCash

us-gaap:EquityMethodInvestmentDividendsOrDistributions
dei:LegalEntity

us-gaap:GainLossOnSaleOfDerivatives
dei:LegalEntity

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate
dei:LegalEntity

us-gaap:IncomeLossAttributableToNoncontrollingInterest

us-gaap:IncomeLossFromEquityMethodInvestments
dei:LegalEntity
dei:LegalEntity
us-gaap:IncomeLossIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
dei:LegalEntity

us-gaap:IncreaseDecreaseInInterestPayableNet
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherOperatingAssets
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities
dei:LegalEntity

us-gaap:IncreaseDecreaseInSecurityDeposits
dei:LegalEntity

us-gaap:InterestAndOtherIncome
dei:LegalEntity
us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityAverageOutstandingAmount
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityIncreaseDecreaseOtherNet

us-gaap:MinorityInterestChangeInRedemptionValue
us-gaap:StatementEquityComponents
dei:LegalEntity
us-gaap:NetIncomeLossAllocatedToGeneralPartners
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
dei:LegalEntity
us-gaap:NetIncomeLossAllocatedToLimitedPartners
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NoncashProjectAbandonmentCosts
dei:LegalEntity

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue
dei:LegalEntity
us-gaap:ProductOrService
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingExpense
dei:LegalEntity

us-gaap:OtherOperatingActivitiesCashFlowStatement
dei:LegalEntity

us-gaap:PaymentsForProceedsFromHedgeFinancingActivities
dei:LegalEntity

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
dei:LegalEntity

us-gaap:PaymentsOfDividendsMinorityInterest
dei:LegalEntity

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock
dei:LegalEntity

us-gaap:PaymentsOfFinancingCosts
dei:LegalEntity

us-gaap:PaymentsToAcquireEquityMethodInvestments
dei:LegalEntity
us-gaap:PropertyPlantAndEquipmentByType, us-gaap:SubsequentEventType
us-gaap:PaymentsToAcquireInterestInJointVenture

us-gaap:PaymentsToAcquireOtherInvestments
dei:LegalEntity

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

us-gaap:PaymentsToDevelopRealEstateAssets
dei:LegalEntity

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
dei:LegalEntity

us-gaap:ProceedsFromIssuanceOfCommercialPaper
dei:LegalEntity

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans
dei:LegalEntity

us-gaap:ProceedsFromLinesOfCredit
dei:LegalEntity

us-gaap:ProceedsFromMinorityShareholders
dei:LegalEntity

us-gaap:ProceedsFromOtherOperatingActivities
dei:LegalEntity

us-gaap:ProceedsFromPartnershipContribution
dei:LegalEntity

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities
dei:LegalEntity
us-gaap:SubsequentEventType
us-gaap:ProceedsFromSaleOfRealEstate

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment
dei:LegalEntity

us-gaap:ProceedsFromSecuredNotesPayable
dei:LegalEntity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

us-gaap:ProceedsFromStockOptionsExercised
dei:LegalEntity

us-gaap:RealEstateTaxesAndInsurance
dei:LegalEntity
us-gaap:StatementBusinessSegments

us-gaap:RepaymentsOfCommercialPaper
dei:LegalEntity

us-gaap:RepaymentsOfLinesOfCredit
dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueConversionOfUnits
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss
dei:LegalEntity
us-gaap:WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingBasic

us-gaap:WriteOffOfDeferredDebtIssuanceCost

eqr:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrentOtherThanInterestAndDividendPayable
dei:LegalEntity

eqr:ConsolidatedProjectUnderDevelopmentCommitmentFund

eqr:DefinedBenefitPlanExpectedFutureBenefitPayments

eqr:DepreciableProperty
dei:LegalEntity

eqr:EarnestMoneyOnPendingAcquisitions

eqr:EscrowDepositsForMortgageAndReplacementReserves

eqr:FairValueOfSerpInvestments
us-gaap:FairValueByFairValueHierarchyLevel

eqr:HistoricalCostNetOfAccumulatedDepreciationOfEncumberedProperties

eqr:HoldingPercentageOfResidentialSecurityDepositsOfNetReceivable

eqr:HoldingPercentageOfResidentialSecurityDepositsOfNetReceivables

eqr:LandAndDepreciablePropertyNet

eqr:LesseeOperatingAndFinancingLeaseLiabilityPaymentsDue

eqr:LesseeOperatingAndFinancingLeaseLiabilityUndiscountedExcessAmount

eqr:LineOfCreditAndCommercialPaper
dei:LegalEntity

eqr:MarketValueOfCommonShares
us-gaap:RealEstateProperties
eqr:NoncontrollingInterestsDeficitPartiallyOwnedProperties

eqr:NoncontrollingInterestsPartiallyOwnedProperties
dei:LegalEntity
us-gaap:RealEstateProperties
us-gaap:RealEstateProperties
eqr:NoncontrollingInterestsSettlementValue

eqr:NumberOfSharesAvailableForIssuance

eqr:OperatingAndFinanceLeaseLiability
dei:LegalEntity

eqr:OperatingAndFinanceLeaseRightOfUseAsset
dei:LegalEntity

eqr:OperatingAndFinancingLeaseLiability

eqr:OtherRestrictedCash
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
eqr:PartnersCapitalAttributableToParent

eqr:RedeemableLimitedPartners
dei:LegalEntity

eqr:RedeemableNoncontrollingInterestsOperatingPartnership
us-gaap:FairValueByFairValueHierarchyLevel

eqr:ResidentSecurityAndUtilityDeposits

eqr:RestrictedDepositsOnRealEstateInvestments

eqr:SalesPriceForCommitmentsToDispose
us-gaap:DisposalGroupClassification, us-gaap:RealEstateProperties
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:AwardType
eqr:ShareBasedCompensationArrangementByShareBasedPaymentAwardLongTermIncentivePlanUnitsWeightedAverageGrantDateFairValue
us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement
eqr:StraightLineReceivable

eqr:TaxDeferredExchangeProceeds

eqr:TotalSecuredAndUnsecuredDebt
dei:LegalEntity
eqr:UnitsOwnershipInterestInOperatingPartnership
us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement
us-gaap:AccountsReceivableGross
us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement
us-gaap:AccountsReceivableNet
us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement
us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
dei:LegalEntity

us-gaap:CommercialPaper
us-gaap:CreditFacility

us-gaap:DebtInstrumentCumulativeSinkingFundPayments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:DebtInstrumentFairValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:CreditFacility
us-gaap:DebtWeightedAverageInterestRate
us-gaap:DebtInstrument
us-gaap:LongtermDebtType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:DevelopmentInProcess
dei:LegalEntity
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:DividendsPayableAmountPerShare

us-gaap:DividendsPayableCurrentAndNoncurrent
dei:LegalEntity

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities
us-gaap:EquityMethodInvestmentOwnershipPercentage

us-gaap:EquityMethodInvestments
us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FiniteLivedIntangibleAssetAcquiredInPlaceLeases

us-gaap:FixturesAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
dei:LegalEntity
us-gaap:GeneralPartnersCapitalAccount

us-gaap:InterestPayableCurrentAndNoncurrent
dei:LegalEntity

us-gaap:InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet

us-gaap:InvestmentBuildingAndBuildingImprovements

us-gaap:LandAvailableForDevelopment
dei:LegalEntity
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:Range, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:LesseeOperatingLeaseDiscountRate

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears
dei:LegalEntity
us-gaap:LimitedPartnersCapitalAccount
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:MinorityInterestInOperatingPartnerships
us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByParent

us-gaap:NotesPayable
dei:LegalEntity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OtherLiabilities
dei:LegalEntity

us-gaap:OtherLiabilitiesFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
dei:LegalEntity
us-gaap:PartnersCapital
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnersCapitalAttributableToNoncontrollingInterest
dei:LegalEntity
us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest

us-gaap:PreferredStockValue
dei:LegalEntity
us-gaap:PreferredUnitsPreferredPartnersCapitalAccounts

us-gaap:RealEstateAccumulatedDepreciation

us-gaap:RealEstateGrossAtCarryingValue
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation
dei:LegalEntity

us-gaap:RealEstateInvestmentPropertyAtCost
dei:LegalEntity

us-gaap:RealEstateInvestmentPropertyNet
dei:LegalEntity

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount

us-gaap:ReplacementReserveEscrow

us-gaap:RestrictedCash

us-gaap:RestrictedCashAndCashEquivalents
dei:LegalEntity
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:SECScheduleIIIRealEstateInvestmentPropertyNet

us-gaap:SaleLeasebackTransactionNetBookValue
us-gaap:DisposalGroupClassification, us-gaap:RealEstateProperties
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:SecuredDebt
dei:LegalEntity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

us-gaap:SecurityDepositLiability
dei:LegalEntity
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1

Plots across concepts


Expenses
Income Tax Expense Benefit
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Cash And Cash Equivalents At Carrying Value
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Operating Lease Right Of Use Asset
Liabilities
Dividends Payable Current And Noncurrent
Noncurrent Liabilities
Minority Interest
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Dividends Payable Amount Per Share
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Share Based Compensation
NetCashProvidedByUsedInInvestingActivities
Payments For Proceeds From Other Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Two

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:CommonStockValue ███████████████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▄▃▃▃▂▂▂▂▂▁3.7443.7293.7233.7223.7223.7213.7173.7133.7083.7053.6943.6843.6833.6823.683.6753.6733.6713.6593.6573.6563.6553.6483.6413.6413.643.6293.6223.6163.6113.6053.6043.6033.6013.2513.0273.013.0052.9752.9662.9632.9452.9022.8
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁387.82386.916NA385.652385.913386.949NA386.896386.107385.184NA383.884383.423383.018NA382.945382.692382.28NA382.373382.065382.243NA380.663380.491380.327NA377.954377.118376.384375.86359.811359.653337.532327.108318.773317.648315.23312.731312.844312.199310.467285.916275.519
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁373.812372.28NA371.869371.795371.582NA370.768370.342369.558NA368.028367.93367.8NA366.996366.82366.605NA365.109365.047364.592NA363.579363.476363.098NA361.409360.809360.47359.919359.811359.653337.532310.398301.336300.193298.805295.99295.831294.663292.895285.916275.519
us-gaap:EarningsPerShareBasic ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▂▂▃▂▁▁▁▁▁▂▁▁▁0.840.150.68000000000000020.240.70.830.77999999999999980.720.830.280.320000000000000060.580.310.570.339999999999999860.370.530.390.750.570.69.840.550.540.790.4930.5990.6110.3090.2170.311.0450.93.0121.180.7250.3320.4750.330.351.8750.420.650.15
 us-gaap:EarningsPerShareBasic dei:LegalEntity eqr:ERPOP▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁0.840.150.68000000000000020.240.70.830.77999999999999980.720.830.280.320000000000000060.580.310.570.339999999999999860.370.530.390.750.570.69.840.550.540.790.490.60000000000000010.61NANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareDiluted ▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▂▂▃▂▁▁▁▁▁▂▁▁▁0.840.150.68000000000000020.240.70.830.780.710.830.280.310000000000000050.580.310.570.339999999999999860.370.530.390.75999999999999980.560.599.760.55999999999999980.530.780.4890.5950.6070.3080.2160.31.0450.93.0121.170.7190.3290.470.330.351.8520.420.650.15
 us-gaap:EarningsPerShareDiluted dei:LegalEntity eqr:ERPOP▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁0.840.150.68000000000000020.240.70.830.780.710.830.280.310000000000000050.580.310.570.339999999999999860.370.530.390.75999999999999980.560.599.760.55999999999999980.530.780.490.60000000000000010.61NANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:ComprehensiveIncomeNetOfTax ▂▁▂▁▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▁▁█▁▁▂▁▁▁▁▁▁▂▂▃▂▁▁▁▁▁▂▁▁318.64259.758270.02896.952266.23313.104296.059272.657294.66694.877103.413230.948123.644222.287131.284144.472203.919148.158281.887212.911221.4183612.584209.3203.266301.968174.952210.672223.844108.75171.698125.206374.644340.4231028.326371.623226.4695.162152.04490.7963.369526.005134.515248.029NA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁█▁▁▁▁▁▁▁▁▁▂▁▃▂▁▁▁▁▁▂▁▁11.7322.90910.7684.2910.79224.23411.77610.94611.7974.3534.6789.5195.199.1394.8626.2018.4166.36625.3159.3629.664145.079.4249.02512.8177.4029.0239.534.8733.3024.89414.52511.97343.34817.38210.1845.0516.8684.9195.12925.8295.7358.829NA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▂▁▂▁▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▁▁█▁▁▂▁▁▁▁▁▁▂▂▃▂▁▁▁▁▁▂▁▁330.37462.667280.796101.242277.022337.338307.835283.603306.46399.23108.091240.467128.834231.426136.146150.673212.335154.524307.202222.273231.0823757.654218.724212.291314.785182.354219.695233.374113.62475.0130.1389.169352.3961071.674389.005236.644100.213158.91295.7158.498551.834140.25256.858NA
us-gaap:CostsAndExpenses ▄▅▄▄▄▅▅▄▄▅▄▄▄▄▃▃▃▃▂▃▃▃▃▄▄▄▃▄▄▄▃▆█▄▁▂▂▂▂▂▁▃▇444.953461.999436.418439.998440.909468.197453.204447.347439.113452.504433.437428.136422.154436.147415.94406.336401.93399.729381.419396.701389.136402.458416.229438.788432.928448.2414.11420.809424.264434.19410.162508.052564.045421.633335.584372.017378.07381.507353.21360.882351.564387.113536.432NA
us-gaap:GeneralAndAdministrativeExpense ▅▅▂▂▃▅▃▃▄▅▃▃▃▆▃▃▄▄▂▃▇▆▄▅▅█▂▂▄▇▅▅▆▆▂▂▄▄▂▂▂▃▁14.67815.38311.09310.85911.83514.51811.6311.41714.32915.38112.39312.6412.50216.27811.85812.56713.62614.17310.43212.39518.29616.71714.1415.2915.7319.9229.6529.96813.75217.57615.16114.43816.08616.49610.0710.09613.39413.68811.14410.12110.90811.4358.858NA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▄▆▄▇█▇▇▇▄▅▄▅▄▅▅▅▄▅▅▅▃▅▅▅▄▅▅▄▄▄▃▂▁▅▅▃▃▃▃▃▃▃328.54362.123229.93995.873272.71333.881299.27277.364252.603110.201123.205110.439118.77179.525115.776127.494117.35995.376130.3115.849172.222-1.759173.813139.806137.562107.15137.386117.995109.74583.35966.442-6.328-57.469-106.579130.251132.90636.77217.5836.14935.77417.1817.91913.108NA
us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest ▂▁▂▁▂▂▂▂▂▁▁▂▁▂▂▂▂▂▂▂▂█▂▂▂▂▂▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁328.0460.364262.98495.365271.481332.671301.306277.846321.299109.257122.388223.846118.41220.548130.084144.196204.16149.941301.987217.246228.3653731.988213.673205.375298.504190.02355.503117.611102.30781.69866.24-12.467-51.455-153.352100.763132.68136.55817.38938.96635.49121.1957.727-32.221-16.996
us-gaap:IncomeTaxExpenseBenefit ▇▇▇▇▇▇▁▇▇▇▇▇▇▇▆▇▇▇███▇▇▇▇▇▇▇█▇▆███▇▇▇▇▇▇▇▆▆0.2420.1530.350.2620.1870.053-3.030.2650.2460.2380.1110.280.2740.213-0.2320.2280.220.2620.4240.4260.4130.350.2190.3290.3260.0430.2480.260.6460.222-0.1570.4930.4280.407-0.0880.2220.2140.1910.0590.2830.203-0.192-0.617NA
us-gaap:IncomeTaxesPaidNet ▆█▆▁▆▇▁▆▆▇▅▇▆▇▅▇▆▇▆▆█▇▆▆▆██▆▆█▆▆▇▇▆▆▅▇▆▆▇▇▆0.1360.7520.054-1.520.1620.266-1.5030.1640.2230.531-0.0810.290.1820.462-0.3240.340.1560.4680.1610.1670.6420.5240.2120.1570.1770.7180.6510.0230.2470.5960.0880.0360.5450.4830.10.119-0.1060.560.038-0.0210.2870.3410.152NA
us-gaap:InterestExpenseDebt ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇█▇▇▇▇▁▇▇▇█▇▇█▇▇▇▇▇▇▇▇▇67.12467.358116.72480.87481.88585.59100.385.936108.90294.93891.906111.21994.131116.10495.31191.14591.224106.2195.9386.35286.472213.492110.447114.205110.795108.622-804.415118.251115.924113.049149.402120.035122.95195.685110.214113.876115.618118.703114.277113.37120.525121.376122.375NA
us-gaap:InterestPaidNet ▁▂▂▂▂▂▂▂▂▂▂▂▂▂▃▁▃▂▂▂▂▆▃▃▃▃▃▃▃▃█▄▄▅▃▃▃▃▂▄▂▄▂52.68474.05897.15175.53972.60375.56195.63875.29496.33974.77789.1980.05392.50996.404102.46860.469110.66886.66898.77869.89493.095220.385108.348109.435105.852113.113107.479108.861114.633112.152271.366131.503137.636182.356111.608116.729111.165125.43596.24138.53996.141146.51497.907NA
us-gaap:NetIncomeLoss ▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▂▂▃▂▁▁▁▁▁▂▁▁316.38657.539252.85691.286260.888308.606289.764267.106308.968104.539117.187214.937113.602211.809125.442138.229196.041143.742277.25208.316218.8393587.758204.486196.692286.42182.522217.739221.744112.6979.135110.976377.192324.7591017.686367.017226.139103.264145.299102.482107.848555.924127.331189.383NA
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▂▂▃▂▁10.9132.1439.3863.3769.71311.53510.6959.9111.513.9194.4228.1594.2998.0594.6735.1667.3545.41111.0698.3538.78143.3098.057.77811.3547.0598.5588.7384.4423.0934.33114.83612.78843.32316.99510.496NANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▂▁▁▁▁▂▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▂▂▃▂▁▁▁▁▁▂▁▁▁315.61456.766252.08490.513260.116307.833288.992266.333308.196103.766116.415214.164112.83211.036124.669137.457195.268142.969276.477207.543218.0673586.985202.989195.859285.587178.842216.703220.707111.65478.099109.94376.155323.7231016.65365.979218.60399.797141.83399.016104.382552.457123.865185.8741.672
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▂▂▃▂▁▁▁▁▁▂▁▁326.52758.909261.4793.889269.829319.368299.687276.243319.706107.685120.837222.323117.129219.095129.342142.623202.622148.38287.546215.896226.8473730.294211.039203.637296.941185.901225.261229.445116.09681.192109.94376.155323.7231016.65382.974229.099104.529148.251103.521109.124578.215123.865185.87NA
 us-gaap:OperatingExpenses us-gaap:StatementBusinessSegments eqr:NonSameStoreAndOther▁▂▄▁▃▄█▂▄▄▆▄▄▅▆▄▅▅▅▄▄█3.948.47214.4125.189.46913.61129.2935.99213.38615.18921.5215.70915.54719.75820.72414.96419.77217.0218.63614.5413.24428.357NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementBusinessSegments eqr:SameStore▇█▅▇▅▆▃▆▅▅▃▄▄▄▁▃▂▂▁▃▁▂201.207212.052186.772203.158190.021199.937174.76196.52186.521191.323174.358182.22177.679180.358160.089173.844167.047167.316156.932171.019160.478161.004NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementBusinessSegments eqr:SameStoreNonSameStoreAndOther▆█▅▆▅▇▆▅▅▆▄▅▄▅▂▃▃▃▁▃▁▃205.147220.524201.184208.338199.49213.548204.053202.512199.907206.512195.878197.929193.226200.116180.813188.808186.819184.336175.568185.559173.722189.361NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments eqr:Boston,eqr:SameStore▇█▆▇▄▆▂▃▂▄▂▃▂▃▁▂▁18.51219.37418.00818.46116.98418.1615.53116.24315.85916.61115.68216.07315.51116.19915.0615.72614.941NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments eqr:Denver,eqr:SameStore▁█2.6433.031NA1.9271.7331.233NA1.761.8311.196NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments eqr:LosAngeles,eqr:SameStore▆█▆▇▅▇▄▆▅▅▂▃▂▃▁▂▁36.76939.20136.38937.02335.01336.91633.24536.66633.77634.48430.26230.84829.03232.04128.08329.4728.309NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments eqr:NonSameStore,eqr:NonSameStoreAndOther▁▁▄▃▃▄█▄▅▆█▆▆▃▄▃▃1.7551.4458.836.1367.2129.16518.799.67611.67613.29317.9113.60513.1547.1059.6466.875.193NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments eqr:OrangeCounty,eqr:SameStore▆▇▄█▅▆▄▇▅▆▂▃▃▆▁▂▂6.1226.3365.8436.5355.9536.2145.8246.3825.9966.2055.3655.6155.5646.0915.2145.4915.376NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments eqr:Other,eqr:NonSameStoreAndOther▄▆▆▂▄▅█▁▄▄▅▄▄█▅▆█2.1857.0275.582-0.9562.2574.44610.503-3.6841.711.8963.612.1042.3939.833.8056.1429.522NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments eqr:SanDiego,eqr:SameStore▆▆▁█████████▇█▇▇▇4.5454.639-0.66.3586.16.3176.1046.4475.9586.1276.0396.2335.7885.9645.6585.8815.736NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments eqr:SanFrancisco,eqr:SameStore▇█▅▆▄▆▄▆▅▅▁▄▃▅▂▅▄31.75933.27529.62631.34929.04530.69428.93231.43829.31730.41725.30929.27127.58129.4126.74729.52728.466NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments eqr:Seattle,eqr:SameStore██▅▇▇▆▃▄▃▂▂▂▂▂▁▂▂19.37219.79916.87819.07318.38317.42714.49916.08615.05313.53113.40314.13714.11113.85312.78413.44913.392NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments eqr:SouthernCalifornia,eqr:SameStore▆█▃█▆█▅█▅▆▃▃▂▄▁▂▁47.43650.17641.63249.91647.06649.44745.17349.49545.7346.81641.66642.69640.38444.09638.95540.84239.421NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments stpr:DC,eqr:SameStore▆▇▅▆▄▆▁███▇█▇▇▆▇▆31.65133.32129.55932.25328.6832.04423.71934.79734.06634.67432.80734.72233.23733.9131.67433.47432.241NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments stpr:NY,eqr:SameStore▆█▆▆▅▇▄▅▄▅▃▃▄▃▁▁▂49.83453.07649.92250.17948.1350.93246.73748.29346.30449.08945.3445.15646.6845.54941.98842.6243.499NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss ▇▂▇▃▇██▇▇▄▄▄▄▄▄▄▄▄▄▄▄▄▅▅▄▄▅▄▄▄▄▂▁▂▃▃▃▂▃▃▃▂▁▂376.844135.56356.606182.41356.889422.109408.952368.363369.26209.969219.306224.731217.654196.869214.764217.786210.55204.371224.07209.373206.018216.625286.964257.501246.184218.171250.55243.269228.304199.252220.767121.39471.033117.529148.247184.127165.711146.152162.148151.076146.495133.5193.325126.954
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▇▇█▇▇▇▇▇▆▆▆█▇▇▇▇▇▇▇▇▇█▇▇▇▆▆▇▆▆▇▆▇▇▇▇▆▇▆▁2.3342.30317.8125.8775.5414.6676.5295.757-14.836-10.027-14.29716.62110.42410.8786.0626.4778.1754.5834.8214.7812.68225.8235.0046.83516.167-7.87-7.3462.184-4.096-7.73214.23-2.54815.66410.644.6060.321-8.1026.745-11.686-104.479NANANANA
us-gaap:PreferredStockDividendsIncomeStatementImpact ▁█▁█▁█▁█▁█▁█▁██▁████▁0.7720.7730.7720.7730.7720.7730.7720.7730.7720.7730.7720.7730.7720.7730.7730.7720.7730.7730.7730.7730.772NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▂▁▁▁▁▂▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▂▂▃▂▁▁▁▁▁▂▁▁▁328.0460.364262.98495.365271.481332.671301.306277.846321.299109.257122.388223.846118.41220.548130.084144.196204.16149.941302.381217.492228.43731.831213.72205.456298.618190.224227.041231.19117.7282.732115.87391.717336.7321061.034384.399236.323108.315152.167107.401112.977581.753133.066198.21247.311
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:Assets ▅▅▅▅▅▆▆▆▆▅▅▅▅▅▅▅▅▅▅▆▆▆▇▇▇▇▇▇▇▇▇███▂▂▂▂▂▁▂▂▂▁20464.34620169.01520286.89120623.97820714.95120919.31821172.76921054.05620990.71120768.81120394.20920542.1520406.58220383.8720570.59920697.83320636.57520608.33820704.14821297.74421229.92221301.29223157.32823008.80423081.8323029.04822950.61423008.09422991.40222889.63122834.54523811.43123482.38323795.15817201.016668.54516714.41216481.24716659.30315756.81716398.12216075.32916184.19415417.515
us-gaap:Liabilities ▁▁▁▂▂▂▃▃▃▃▂▂▂▂▂▂▂▂▂▃▁▂▆▆▆▆▆▆▆▆▆▇▇█▁▃▃▃▃▂▃▃▄▂9382.1769207.2519184.4549575.9069540.789795.2910164.84310152.05810175.12510069.7449615.4549693.829600.3139504.219729.7819823.5169730.1999733.1799801.07210517.0519344.9949471.49711894.1911781.55511748.91911813.59311742.10511860.52311922.73311764.79711626.20512512.58412435.57712973.3139275.52110040.47610157.98410005.06910380.0429523.24810084.17210256.54610592.0789984.722
us-gaap:LiabilitiesAndStockholdersEquity ▅▅▅▅▅▆▆▆▆▅▅▅▅▅▅▅▅▅▅▆▆▆▇▇▇▇▇▇▇▇▇███▂▂▂▂▂▁▂▂▂▁20464.34620169.01520286.89120623.97820714.95120919.31821172.76921054.05620990.71120768.81120394.20920542.1520406.58220383.8720570.59920697.83320636.57520608.33820704.14821297.74421229.92221301.29223157.32823008.80423081.8323029.04822950.61423008.09422991.40222889.63122834.54523811.43123482.38323795.15817201.016668.54516714.41216481.24716659.30315756.81716398.12216075.32916184.19415417.515
us-gaap:StockholdersEquity ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇██▇▇▇▇▇▇▇▇▇▇▇▇▄▂▂▂▂▂▂▁▁▁10433.99110314.810525.65110517.4810597.67310530.36710315.50610182.63610153.52910046.88610173.20410235.42410208.43710289.17210242.46410259.26910290.50510280.27610229.07810115.50511160.57811063.77210470.36810478.53410500.76410331.36210368.45610378.33610289.73810376.56110507.20110598.63710322.38410123.9287289.8135990.7725885.2585822.0085669.0155735.6995750.4965278.8385090.1865047.339
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ▁▁▁▂▂▁▁▁▃▁▁▁▁▁▁▁▁▁▁▅▄▄▁▁▁▁▁▁▁▁▁█▂▁▅▁▁▂▄▁▅▃▄▂39.49235.45342.591178.333187.41682.33545.75328.777251.27329.39147.44232.99534.50744.45350.64746.56537.71942.13977.207517.586497.843368.04942.27637.36692.10949.41840.0831.47876.13237.20953.534972.761152.56456.087612.5945.62344.585219.628383.92145.986604.764306.072431.408193.288
us-gaap:Land ▆▆▆▆▆▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▇███████▇▇██▃▃▃▃▃▂▂▂▂▁5780.7055785.3675785.3675794.7715789.3075883.0655936.1885955.1215889.3085918.9945875.8035866.4575986.3295960.8045996.0245985.0045927.9495902.1865899.8625874.6475835.1955777.2065864.0466424.8876374.7796357.586295.4046329.9076296.7356281.1246192.5126201.3336264.7876319.3534554.9124609.3374565.6464384.24367.8164158.2884161.3584107.7694110.2753650.324
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▅▅▆█▇▇▇█▂▂▂▁▁▁▁▁▁▁53.36453.27452.78254.82855.3155.86652.23852.47452.90762.85358.34957.57658.12459.09158.25459.02959.24659.48360.14160.91165.95266.47668.10174.10894.71889.284105.434128.1142.318205.068178.526165.898188.582193.33817.87717.90617.88614.80312.32711.023.6233.5333.1676.995
us-gaap:OperatingLeaseRightOfUseAsset NANA499.287NANANA512.774481.044431.753434.6830.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingLeaseRightOfUseAsset us-gaap:PropertyPlantAndEquipmentByType eqr:CorporateOfficeNANA39.203NANANA41.59643.73915.38116.024NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingLeaseRightOfUseAsset us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA402.5NANANA413.196414.104416.372418.659NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:LongTermDebt NANA8126.903NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterest ▄▅▅▅▅▅▄▄▄▄▄▅▅▅▅▅▅▅▅▄▅▅▄▄███████▇▇▇▅▄▄▃▃▁▁▁▁▁208.056237.441237.835236.886239.803240.319229.02224.363226.022219.619226.445231.667231.349235.921231.399234.507235.352235.15231.906223.296246.026244.943225.987226.13343.969342.227339.32339.086338.881342.997337.995324.153316.532311.16237.294223.078218.967196.946193.842119.072125.313123.611118.39127.174
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA16.906NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA16.997NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA17.329NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA17.375NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA954.108NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:StockholdersEquity ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇██▇▇▇▇▇▇▇▇▇▇▇▇▄▂▂▂▂▂▂▁▁▁10433.99110314.810525.65110517.4810597.67310530.36710315.50610182.63610153.52910046.88610173.20410235.42410208.43710289.17210242.46410259.26910290.50510280.27610229.07810115.50511160.57811063.77210470.36810478.53410500.76410331.36210368.45610378.33610289.73810376.56110507.20110598.63710322.38410123.9287289.8135990.7725885.2585822.0085669.0155735.6995750.4965278.8385090.1865047.339
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇██▇▇▇▇▇▇▇▇▇▇▇▇▄▂▂▂▂▂▂▁▁▁10642.04710552.24110763.48610754.36610837.47610770.68610544.52610406.99910379.55110266.50510399.64910467.09110439.78610525.09310473.86310493.77610525.85710515.42610460.98410338.80111406.60411308.71510696.35510704.66410844.73310673.58910707.77610717.42210628.61910719.55810845.19610922.7910638.91610435.0887527.1076213.856104.2256018.9545862.8575854.7715875.8095402.4495208.5765174.513
us-gaap:CommonStockValue ███████████████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▄▃▃▃▂▂▂▂▂▁3.7443.7293.7233.7223.7223.7213.7173.7133.7083.7053.6943.6843.6833.6823.683.6753.6733.6713.6593.6573.6563.6553.6483.6413.6413.643.6293.6223.6163.6113.6053.6043.6033.6013.2513.0273.013.0052.9752.9662.9632.9452.9022.8
us-gaap:AdditionalPaidInCapital ██████████████████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▄▂▂▂▂▂▂▂▁▁9110.1219083.3469128.5999166.0189118.3329092.4418965.5778917.3128949.5818925.8828935.4538900.3248905.1848910.3068886.5868848.7398838.8048846.9978758.4228741.8468718.3658658.1698572.3658584.1438607.8898539.1158536.348574.1768527.388541.0468561.58542.8228496.0278492.8456542.3555364.8025226.0885152.9755047.1865032.8634947.4674898.4354741.5214477.426
us-gaap:RetainedEarningsAccumulatedDeficit ▄▄▅▅▅▅▅▄▄▄▄▄▄▅▅▅▅▅▅▅██▆▆▆▆▆▆▆▆▇▇▆▆▃▃▂▂▂▂▂▁▁▁1321.8751231.8081399.7151371.9381505.6941469.8211386.4951308.4231252.8091155.0321261.7631344.8251329.61415.6381403.531464.2491511.8991501.6541543.6261451.4522524.7882490.8612009.0912007.592012.9091928.4491950.6391915.3441875.7321944.7982047.2582171.6031939.5981759.99887.355770.697654.235656.001615.572684.902680.619228.092203.581353.659
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▆▆▆▆▆▅▅▅▅▅▆▆▆▅▅▅▄▄▄▄▄▃▃▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▅▆▆█-39.029-41.363-43.666-61.478-67.355-72.896-77.563-84.092-89.849-75.013-64.986-50.689-67.31-77.734-88.612-94.674-101.151-109.326-113.909-118.73-123.511-126.193-152.016-157.02-163.855-180.022-172.152-164.806-166.99-162.894-155.162-169.392-166.844-182.508-193.148-197.754-198.075-189.973-196.718-185.032-80.553-50.634-57.8184.681
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax dei:LegalEntity eqr:ERPOP███▇▆▆▆▅▅▆▆▇▆▆▅▅▄▄▄▃▃▃▁▁-39.029-41.363-43.666-61.478-67.355-72.896-77.563-84.092-89.849-75.013-64.986-50.689-67.31-77.734-88.612-94.674-101.151-109.326-113.909-118.73-123.511-126.193-152.016-157.02NANA-172.152NANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterest ▄▅▅▅▅▅▄▄▄▄▄▅▅▅▅▅▅▅▅▄▅▅▄▄███████▇▇▇▅▄▄▃▃▁▁▁▁▁208.056237.441237.835236.886239.803240.319229.02224.363226.022219.619226.445231.667231.349235.921231.399234.507235.352235.15231.906223.296246.026244.943225.987226.13343.969342.227339.32339.086338.881342.997337.995324.153316.532311.16237.294223.078218.967196.946193.842119.072125.313123.611118.39127.174
 us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders dei:LegalEntity,us-gaap:PartnerTypeOfPartnersCapitalAccount eqr:ERPOP,us-gaap:PartiallyOwnedProperties▁▃▁▁▁█▁▂▂▄▁▂▃▄▂▁▁▅0.8482.8830.4391.0430.9859.3150.7051.2341.2513.9680.9011.2623.4484.221.4360.9290.855.134NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents eqr:PartiallyOwned▁▃▁▁▁█▁▂▂▄▁▂▃▄▂▁▁▅0.8482.8830.4391.0430.9859.3150.7051.2341.2513.9680.9011.2623.4484.221.4360.9290.855.134NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▄▁█▁7.418.5897.9517.9637.9619.0767.4037.4147.4747.6057.1227.1867.1867.1886.6666.6876.696.6967.21850.4737.258122.4997.885NANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▆▄█▄▇▇█▆▇▆▇▆▇▆█▄▅▅▆▅▃▅▇▆▇▆█▅▆▁▇▄▃▃▅▇▄▃▄▃▃▃230.072346.053231.212399.238252.635382.451362.804403.407317.228373.545312.104358.737324.436361.018302.754413.001256.749293.284292.168344.245273.694201.382293.153388.299327.152347.895309.802394.735282.633336.903101.823349.274224.305193.514183.251276.987350.986235.027184.283221.574204.949187.528172.012NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂█▂▂▂▂▂▂▂▂▂▃▃▁▂▂▂▂▁▂▃▂▂70.99-126.345247.128-148.889299.338266.009-113.644-289.025-22.12-347.035-108.014-184.644-231.474147.298-113.499-254.34-153.422-73.035119.808-119.842120.7715751.236-267.759-205.163-26.327-179.22211.477-160.965-190.899-304.279-64.815620.386479.025-1041.573121.02811.46-310.853-82.684-563.05-35.844442.072-38.006266.415NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▇▇▁▇▇▇▇▇▇▇▇▆▇▇█▇▇▇▇█▆▇▇▇-6.397-221.6-613.826-260.668-447.21-624.689-216.757-339.254-79.146-49.317-176.527-174.22-98.796-514.367-276.939-149.815-107.747-255.317-852.355-204.66-264.671-5626.845-20.484-237.879-258.134-159.335-312.677-278.424-52.811-48.949-956.235-149.463-606.853291.556262.688-287.409-215.176-316.636716.702-744.508-348.329-274.858-50.679NA
 us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity eqr:ERPOP██▇█▇▇███████▇████▇██▁█████-6.397-221.6-613.826-260.668-447.21-624.689-216.757-339.254-79.146-49.317-176.527-174.22-98.796-514.367-276.939-149.815-107.747-255.317-852.355-204.66-264.671-5626.845-20.484-237.879-258.134-159.335-307.176NANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:AmortizationOfFinancingCosts ▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▆▆▆▆▁▆▆▆▇▆▆▇█▆▆▆▇▇▆▆▆1.9392.1852.6862.1012.1112.0413.0062.8813.6472.1362.2563.2762.0993.6792.0792.0642.0872.2962.6332.2612.3455.3943.0672.6072.5382.589-19.6422.6283.1342.7926.5614.3354.3537.02311.0513.3384.0632.9744.8774.7214.4443.0232.64NA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▆▄█▄▇▇█▆▇▆▇▆▇▆█▄▅▅▆▅▃▅▇▆▇▆█▅▆▁▇▄▃▃▅▇▄▃▄▃▃▃230.072346.053231.212399.238252.635382.451362.804403.407317.228373.545312.104358.737324.436361.018302.754413.001256.749293.284292.168344.245273.694201.382293.153388.299327.152347.895309.802394.735282.633336.903101.823349.274224.305193.514183.251276.987350.986235.027184.283221.574204.949187.528172.012NA
us-gaap:NetIncomeLoss ▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▂▂▃▂▁▁▁▁▁▂▁▁316.38657.539252.85691.286260.888308.606289.764267.106308.968104.539117.187214.937113.602211.809125.442138.229196.041143.742277.25208.316218.8393587.758204.486196.692286.42182.522217.739221.744112.6979.135110.976377.192324.7591017.686367.017226.139103.264145.299102.482107.848555.924127.331189.383NA
us-gaap:ProfitLoss ▂▁▁▁▁▂▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▂▂▃▂▁▁▁▁▁▂▁▁▁328.0460.364262.98495.365271.481332.671301.306277.846321.299109.257122.388223.846118.41220.548130.084144.196204.16149.941302.381217.492228.43731.831213.72205.456298.618190.224227.041231.19117.7282.732115.87391.717336.7321061.034384.399236.323108.315152.167107.401112.977581.753133.066198.21247.311
us-gaap:ShareBasedCompensation ▄▅▂▂▃▄▂▂▄▆▂▃▄▆▂▂▄▄▂▂▆▆▃▃▆█▁▁▅█▃▄▇▆▂▂▄▅▂▂▃▃▂7.3998.6784.8994.85.6317.8443.6723.9956.9769.8064.8625.2386.75410.2784.9984.9727.1547.8734.994.81110.7629.9675.3385.25210.40713.612.8962.7428.92412.9816.4556.9311.85310.2363.9963.9587.918.9684.4554.3335.8656.5244.159NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂█▂▂▂▂▂▂▂▂▂▃▃▁▂▂▂▂▁▂▃▂▂70.99-126.345247.128-148.889299.338266.009-113.644-289.025-22.12-347.035-108.014-184.644-231.474147.298-113.499-254.34-153.422-73.035119.808-119.842120.7715751.236-267.759-205.163-26.327-179.22211.477-160.965-190.899-304.279-64.815620.386479.025-1041.573121.02811.46-310.853-82.684-563.05-35.844442.072-38.006266.415NA
us-gaap:PaymentsToAcquireRealEstate NANA0.0NANANA371.642494.104394.194258.9380.0507.546146.41254.134-0.001409.329NANA-0.00145.2010.0160.68171.76122.58130.2756.7265.331139.192116.931148.5350.00.0108.3080.079.117244.084337.663183.112807.018159.184351.529123.86881.196NA
 us-gaap:PaymentsToAcquireRealEstate dei:LegalEntity eqr:ERPOPNANA0.0NANANA371.642494.104394.194258.9380.0507.546146.41254.134-0.001409.329NANA-0.00145.2010.0160.68171.76122.58130.2756.7265.331NANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:SubsequentEventType us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▇▇▁▇▇▇▇▇▇▇▇▆▇▇█▇▇▇▇█▆▇▇▇-6.397-221.6-613.826-260.668-447.21-624.689-216.757-339.254-79.146-49.317-176.527-174.22-98.796-514.367-276.939-149.815-107.747-255.317-852.355-204.66-264.671-5626.845-20.484-237.879-258.134-159.335-312.677-278.424-52.811-48.949-956.235-149.463-606.853291.556262.688-287.409-215.176-316.636716.702-744.508-348.329-274.858-50.679NA
 us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity eqr:ERPOP██▇█▇▇███████▇████▇██▁█████-6.397-221.6-613.826-260.668-447.21-624.689-216.757-339.254-79.146-49.317-176.527-174.22-98.796-514.367-276.939-149.815-107.747-255.317-852.355-204.66-264.671-5626.845-20.484-237.879-258.134-159.335-307.176NANANANANANANANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▁▃▇█▇█1.8421.8711.9381.9481.9321.941NANANANANANANANANANANANANANANANA183.8NANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividendsCommonStock ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▄▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁224.675224.308224.27224.241224.188211.239210.72210.448210.194199.749198.938198.869198.831185.484185.108185.023184.942184.3021280.887184.134184.0523122.652201.18201.127201.033181.408181.095180.721180.561234.282144.146144.117144.017249.33102.132101.564101.405168.35100.09599.93399.34132.65595.784NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3744000.03729000.03723000.03722000.03722000.03721000.03717000.03713000.03708000.03705000.03694000.03684000.03683000.03682000.03680000.03675000.03673000.03671000.03659000.03657000.03656000.03655000.03648000.03641000.03641000.03640000.03629000.03622000.03616000.03611000.03605000.03604000.03603000.03601000.03251000.03027000.03010000.03005000.02975000.02966000.02963000.02945000.02902000.02800000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value387386385385386386386385383383383382382382382382382380380380377377376375359359337327318317315312312312310285300299280275290289288
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding dei:LegalEntity

eqr:ERPOP


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value387386385385386386386385383383383382382382382382382380380380377
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value373372371371371370370369368367367366366366365365364363363363361360360359359359337310301300298295295294292285282282280275273272272
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.840.150.680.240.70.830.780.720.830.280.320.580.310.570.340.370.530.390.750.570.69.840.550.540.790.4930.5990.6110.3090.2170.311.0450.93.0121.180.7250.3320.4750.330.351.8750.420.650.090.020.180.150.480.350.28
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareBasic dei:LegalEntity

eqr:ERPOP


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.840.150.680.240.70.830.780.720.830.280.320.580.310.570.340.370.530.390.750.570.69.840.550.540.790.490.60.61
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.4100.299.8

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.840.150.680.240.70.830.780.710.830.280.310.580.310.570.340.370.530.390.760.560.599.760.560.530.780.4890.5950.6070.3080.2160.31.0450.93.0121.170.7190.3290.470.330.351.8520.420.650.090.020.180.150.480.350.28
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareDiluted dei:LegalEntity

eqr:ERPOP


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.840.150.680.240.70.830.780.710.830.280.310.580.310.570.340.370.530.390.760.560.599.760.560.530.780.490.60.61
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.2100.8100.5

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value318592709626631329627229494103230123222131144203148281212221361220920330117421022310871125374340102837122695152903.369526134248-8.015-61.4542
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.045.943.339.844.014.315.835.419.335.120.823.133.324.546.635.137.2583.529.829.244.526.331.733.716.711.319.859.553.6190.772.340.717.528.817.70.7105.625.854.6-1.8-13.79.1

us-gaap:ComprehensiveIncomeNetOfTax dei:LegalEntity

eqr:ERPOP


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value32961280100276324306282305981072391282301361492111532932212303756217211313181218232
Percentage of ComprehensiveIncomeNetOfTax103.4103.7103.7103.7103.7103.7103.7103.7103.7103.7103.8103.8103.8103.8103.7103.7103.8103.8104.0104.0104.0104.0103.9104.0104.0103.9103.9103.9
Percentage of Revenues0.00.00.00.00.047.644.941.345.714.916.436.720.136.521.624.034.525.448.436.538.7606.830.930.346.227.332.935.0
Percentage of Revenues eqr:ERPOP0.00.00.00.00.047.60.041.345.714.90.036.720.136.50.024.034.525.40.036.538.7606.80.030.346.227.30.035.0

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value112.909104.2910241110114.3534.6789.5195.199.1394.8626.2018.4166.366259.3629.6641459.4249.025127.4029.0239.534.8733.3024.89414114317105.0516.8684.9195.129255.7358.8291.0430.1282.373
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.03.61.71.61.80.70.71.50.81.40.81.01.41.14.21.51.623.41.31.31.91.11.41.40.70.50.82.31.98.03.41.80.91.31.01.05.21.11.90.20.00.5

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest dei:LegalEntity

eqr:ERPOP


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.7410.6820.7420.7030.88120.8470.830.8210.7990.7790.750.5090.68-0.0310.8010.7650.788140.8230.7810.7641.1840.9860.8440.6430.7440.708
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest6.323.46.916.48.251.77.27.67.018.416.77.99.87.4-0.612.99.112.455.58.88.10.512.610.96.68.78.27.4
Percentage of Revenues0.00.00.00.00.01.80.10.10.10.10.10.10.10.1-0.00.10.10.12.30.10.10.10.20.10.10.10.10.1
Percentage of Revenues eqr:ERPOP0.00.00.00.00.01.80.00.10.10.10.00.10.10.10.00.10.10.10.00.10.10.10.00.10.10.10.00.1

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value33062280101277337307283306991082401282311361502121543072222313757218212314182219233113751303893521071389236100158958.498551140256-6.972-61.32244
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.049.445.041.445.815.016.636.820.136.621.624.134.725.650.736.738.8607.031.130.546.427.433.135.117.411.820.661.855.5198.875.742.618.430.118.71.7110.826.956.5-1.5-13.79.7

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity

eqr:ERPOP


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value33062280101277337307283306991082401282311361502121543072222313757218212314182219233
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.049.445.041.445.815.016.636.820.136.621.624.134.725.650.736.738.8607.031.130.546.427.433.135.1
Percentage of Revenues eqr:ERPOP0.00.00.00.00.049.40.041.445.815.00.036.820.136.60.024.134.725.60.036.738.8607.00.030.546.427.40.035.1

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value444461436439440468453447439452433428422436415406401399381396389402416438432448414420424434410508564421335372378381353360351387536348347354
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.068.666.365.365.668.366.465.666.068.965.965.165.666.263.065.565.465.059.263.063.767.362.363.465.068.565.080.788.878.265.366.969.572.368.970.570.674.4118.176.877.676.3

us-gaap:CostsAndExpenses dei:LegalEntity

eqr:ERPOP


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value444461436439440468453447439452433428422436415406401399381396389402416438432448414420
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.068.666.365.365.668.366.465.666.068.965.965.165.666.263.065.565.465.059.263.063.767.262.363.4
Percentage of Revenues eqr:ERPOP0.00.00.00.00.068.60.065.365.668.30.065.666.068.90.065.165.666.20.065.565.465.00.063.063.767.20.063.4

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value14151110111411111415121212161112131410121816141515199.6529.96813171514161610101313111010118.858101010
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.02.11.71.72.12.31.91.92.02.61.92.02.22.31.72.03.12.72.02.22.33.01.51.52.12.82.42.32.53.12.01.82.52.62.22.02.22.21.92.32.32.3

us-gaap:GeneralAndAdministrativeExpense dei:LegalEntity

eqr:ERPOP


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value14151110111411111415121212161112131410121816141515199.6529.968
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.599.2100.0100.0
Percentage of Revenues0.00.00.00.00.02.11.71.72.12.31.91.92.02.61.92.02.22.31.72.03.12.72.02.22.33.01.51.5
Percentage of Revenues eqr:ERPOP0.00.00.00.00.02.10.01.72.12.30.01.92.02.60.02.02.22.30.02.03.12.70.02.22.33.00.01.5

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value32862229952723332992772521101231101187911512711795130115172-1.7591731391371071371171098366-6.328-57.469-106.57913013236173635177.91913-21.575-14.712-9.262
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.048.943.840.537.716.618.916.918.612.618.420.419.215.821.519.128.9-0.324.720.120.316.120.717.816.813.210.5-1.0-9.0-19.825.423.96.83.37.17.03.41.52.9-4.8-3.3-2.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments dei:LegalEntity

eqr:ERPOP


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value32862229952723332992772521101231101187911512711795130115172-1.759173139137107137117
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.048.943.840.537.716.618.916.918.612.618.420.419.215.821.519.128.9-0.324.720.120.316.120.717.8
Percentage of Revenues eqr:ERPOP0.00.00.00.00.048.90.040.537.716.60.016.918.612.60.020.419.215.80.019.128.9-0.30.020.120.316.10.017.8

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value328602629527133230127732110912222311822013014420414930121722837312132052981903551171028166-12.467-51.455-153.35210013236173835217.727-32.221144.714-7.267-16.9964.2567.8137.858
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.048.844.140.648.016.518.734.318.534.820.623.133.324.849.935.838.4602.830.429.544.028.553.517.715.712.910.5-2.0-8.1-28.419.623.96.73.37.66.94.31.5-7.13.31.1-1.60.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity

eqr:ERPOP


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value32860262952713323012773211091222231182201301442041493012172283731213205298190226231
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.063.8196.6
Percentage of Revenues0.00.00.00.00.048.844.140.648.016.518.734.318.534.820.623.133.324.849.935.838.4602.830.429.544.028.534.134.8
Percentage of Revenues eqr:ERPOP0.00.00.00.00.048.80.040.648.016.50.034.318.534.80.023.133.324.80.035.838.4602.80.029.544.028.50.034.8

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value242000.0153000.0350000.0262000.0187000.053000.0-3030000.0265000.0246000.0238000.0111000.0280000.0274000.0213000.0-232000.0228000.0220000.0262000.0424000.0426000.0413000.0350000.0219000.0329000.0326000.043000.0248000.0260000.0646000.0222000.0-157000.0493000.0428000.0407000.0-88000.0222000.0214000.0191000.059000.0283000.0203000.0-192000.0-617000.0291000.0-147000.0-159000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.0-0.40.00.00.00.00.00.00.0-0.00.00.00.00.10.10.10.10.00.00.00.00.00.00.10.0-0.00.10.10.1-0.00.00.00.00.00.10.0-0.0-0.10.1-0.0-0.0

us-gaap:IncomeTaxExpenseBenefit dei:LegalEntity

eqr:ERPOP


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value242000.0153000.0350000.0262000.0187000.053000.0-3030000.0265000.0246000.0238000.0111000.0280000.0274000.0213000.0-232000.0228000.0220000.0262000.0424000.0426000.0413000.0350000.0219000.0329000.0326000.043000.0248000.0260000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.0-0.40.00.00.00.00.00.00.0-0.00.00.00.00.10.10.10.10.00.00.00.00.00.0
Percentage of Revenues eqr:ERPOP0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.00.00.00.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value136000.0752000.054000.0-1520000.0162000.0266000.0-1503000.0164000.0223000.0531000.0-81000.0290000.0182000.0462000.0-324000.0340000.0156000.0468000.0161000.0167000.0642000.0524000.0212000.0157000.0177000.0718000.0651000.023000.0247000.0596000.088000.036000.0545000.0483000.0100000.0119000.0-106000.0560000.038000.0-21000.0287000.0341000.0152000.048000.0-1090000.0-1850000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.0-0.20.00.00.1-0.00.00.00.1-0.10.10.00.10.00.00.10.10.00.00.00.10.10.00.00.10.00.00.10.10.00.0-0.00.10.0-0.00.10.10.00.0-0.2-0.4

us-gaap:IncomeTaxesPaidNet dei:LegalEntity

eqr:ERPOP


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value136000.0752000.054000.0-1520000.0162000.0266000.0-1503000.0164000.0223000.0531000.0-81000.0290000.0182000.0462000.0-324000.0340000.0156000.0468000.0161000.0167000.0642000.0524000.0212000.0157000.0177000.0718000.0651000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.0-0.20.00.00.1-0.00.00.00.1-0.10.10.00.10.00.00.10.10.00.00.00.10.1
Percentage of Revenues eqr:ERPOP0.00.00.00.00.00.00.00.00.00.10.00.00.00.10.00.10.00.10.00.00.10.10.00.00.00.10.0

Interest Expense Debt

us-gaap:InterestExpenseDebt

us-gaap:InterestExpenseDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value676711680818510085108949111194116959191106958686213110114110108-804.415118115113149120122195110113115118114113120121122121113114
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.012.514.712.516.314.314.117.014.718.315.114.614.917.615.814.214.534.515.716.416.316.3-121.017.817.817.823.719.119.436.321.520.521.322.522.322.124.223.326.926.725.424.5

us-gaap:InterestExpenseDebt dei:LegalEntity

eqr:ERPOP


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value676711680818510085108949111194116959191106958686213110114110108109118
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.1100.1-13.7100.0
Percentage of Revenues0.00.00.00.00.012.514.712.516.314.314.117.014.718.315.114.614.917.615.814.214.534.515.716.416.316.316.517.8
Percentage of Revenues eqr:ERPOP0.00.00.00.00.012.50.012.516.314.30.017.014.718.30.014.614.917.60.014.214.534.50.016.416.316.30.017.8

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5274977572759575967489809296102601108698699322010810910511310710811411227113113718211111611112596138961469714784144
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.011.114.011.014.411.313.712.314.515.216.29.718.114.316.311.515.635.615.415.715.617.016.216.417.617.743.020.921.733.821.721.020.423.818.827.119.328.121.632.618.931.2

us-gaap:InterestPaidNet dei:LegalEntity

eqr:ERPOP


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value52749775727595759674898092961026011086986993220108109105113107
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.011.114.011.014.411.313.712.314.515.216.29.718.114.316.311.515.635.615.415.715.617.016.2
Percentage of Revenues eqr:ERPOP0.00.00.00.00.011.10.011.014.411.30.012.314.515.20.09.718.114.30.011.515.635.60.015.715.617.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value31657252912603082892673081041172141132111251381961432772082183587204196286182217221112791103773241017367226103145102107555127189289.96155
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.045.242.439.046.115.818.032.917.833.519.922.132.023.845.834.436.8579.529.128.242.227.432.833.417.312.517.659.951.1188.871.440.719.027.520.021.1111.624.541.76.32.211.9

us-gaap:NetIncomeLoss dei:LegalEntity

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value32759262942703203002773201081212231172191301432031492882162273731212204297189226230
Percentage of NetIncomeLoss103.4103.7103.7103.7103.7103.7103.7103.7103.7103.7103.8103.8103.8103.8103.7103.7103.8103.8104.0104.0104.0104.0103.9104.0104.0103.9103.9103.9
Percentage of Revenues0.00.00.00.00.046.943.940.447.916.418.634.218.434.720.623.033.224.747.635.738.2602.730.229.443.828.434.034.7
Percentage of Revenues eqr:ERPOP0.00.00.00.00.046.90.040.447.916.40.034.218.434.70.023.033.224.70.035.738.2602.70.029.443.828.40.034.7

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value31657252912603082892673081041172141132111251381961432772082183587204196286182217221112791103773241017367226103145102107555127
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.045.242.439.046.115.818.032.917.833.519.922.132.023.845.834.436.8579.529.128.242.227.432.833.417.312.517.659.951.1188.871.440.719.027.520.021.1111.624.5
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value102.1439.3863.3769.71311109.91113.9194.4228.1594.2998.0594.6735.1667.3545.411118.3538.781438.057.778117.0598.5588.7384.4423.0934.3311412431610
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.01.71.61.41.70.60.71.20.71.30.70.81.20.91.81.41.523.11.11.11.71.11.31.30.70.50.72.42.08.03.31.9

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

eqr:PartiallyOwned


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.7410.6820.7420.7030.88120.8470.830.8210.7990.7790.750.5090.68-0.0310.8010.7650.788
Percentage of NetIncomeLossAttributableToNoncontrollingInterest6.831.87.920.89.1108.67.98.47.120.417.69.211.88.4-0.715.510.414.6
Percentage of Revenues0.00.00.00.00.01.80.10.10.10.10.10.10.10.1-0.00.10.10.1
Percentage of Revenues eqr:PartiallyOwned0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value102.1439.3863.3769.71311109.91113.9194.4228.1594.2998.0594.6735.1667.3545.411331-8.353-8.78-143.30960
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.02998.9-100.0-100.0-100.0750.7
Percentage of Revenues0.00.00.00.00.01.71.61.41.70.60.71.20.71.30.70.81.20.954.8-1.4-1.5-23.18.6
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value315562529026030728826630810311621411221112413719514227620721835862021952851782162201117810937632310163652189914199104552123185256.34351411329677
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.045.142.338.946.015.717.832.817.633.319.822.031.923.745.734.236.6579.428.928.142.126.832.633.217.112.317.459.851.0188.671.239.318.426.919.320.4110.923.840.95.51.411.20.00.00.00.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value32658261932693192992763191071202221172191291422021482872152263730211203296185225229116811093763231016382229104148103109578123185256.343
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.046.843.840.347.816.318.534.118.334.620.522.933.124.647.535.638.1602.630.029.243.727.933.934.617.812.817.459.851.0188.674.541.219.228.120.221.3116.123.840.95.51.4

Operating Expenses

us-gaap:OperatingExpenses us-gaap:StatementBusinessSegments

us-gaap:OperatingExpenses

eqr:NonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3.948.472145.189.46913295.9921315211515192014191718141328
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.02.04.30.92.02.33.32.42.43.13.32.43.22.83.12.42.24.6
Percentage of Revenues eqr:NonSameStoreAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value201212186203190199174196186191174182177180160173167167156171160161
Percentage of OperatingExpenses5106.82503.01295.93922.02006.81468.9596.63279.71393.41259.6810.21160.01142.9912.8772.51161.7844.9983.1842.11176.21211.7567.8
Percentage of Revenues0.00.00.00.00.029.325.628.727.928.926.727.927.828.525.427.927.327.725.928.227.026.0
Percentage of Revenues eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:SameStoreNonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value205220201208199213204202199206195197193200180188186184175185173189
Percentage of OperatingExpenses5206.82603.01395.94022.02106.81568.9696.63379.71493.41359.6910.21260.01242.91012.8872.51261.7944.91083.1942.11276.21311.7667.8
Percentage of Revenues0.00.00.00.00.031.329.829.629.931.230.030.330.231.628.730.330.530.529.030.629.230.6
Percentage of Revenues eqr:SameStoreNonSameStoreAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingExpenses us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

eqr:Boston, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1819181816181516151615161516151514
Percentage of OperatingExpenses469.8228.7125.0356.4179.4133.453.0271.1118.5109.472.9102.399.882.072.7105.175.6
Percentage of Revenues0.00.00.00.00.02.72.32.42.42.52.42.52.42.62.42.52.4
Percentage of Revenues eqr:Boston eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:Denver, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.6433.0311.9271.7331.2331.761.8311.196
Percentage of OperatingExpenses67.135.837.218.39.129.413.77.9
Percentage of Revenues0.00.00.00.00.20.30.30.2
Percentage of Revenues eqr:Denver eqr:SameStore0.00.00.00.00.00.00.00.0

eqr:LosAngeles, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3639363735363336333430302932282928
Percentage of OperatingExpenses933.2462.7252.5714.7369.8271.2113.5611.9252.3227.0140.6196.4186.7162.2135.5196.9143.2
Percentage of Revenues0.00.00.00.00.05.44.95.45.05.24.64.74.55.14.54.74.6
Percentage of Revenues eqr:LosAngeles eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:NonSameStore, eqr:NonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1.7551.4458.836.1367.2129.165189.67611131713137.1059.6466.875.193
Percentage of OperatingExpenses44.517.161.3118.576.267.364.1161.587.287.583.286.684.636.046.545.926.3
Percentage of Revenues0.00.00.00.00.01.32.71.41.72.02.72.12.11.11.51.10.8
Percentage of Revenues eqr:NonSameStore eqr:NonSameStoreAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:OrangeCounty, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6.1226.3365.8436.5355.9536.2145.8246.3825.9966.2055.3655.6155.5646.0915.2145.4915.376
Percentage of OperatingExpenses155.474.840.5126.262.945.719.9106.544.840.924.935.735.830.825.236.727.2
Percentage of Revenues0.00.00.00.00.00.90.90.90.90.90.80.90.91.00.80.90.9
Percentage of Revenues eqr:OrangeCounty eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:Other, eqr:NonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2.1857.0275.582-0.9562.2574.44610-3.6841.711.8963.612.1042.3939.833.8056.1429.522
Percentage of OperatingExpenses55.582.938.7-18.523.832.735.9-61.512.812.516.813.415.449.818.441.048.2
Percentage of Revenues0.00.00.00.00.00.71.5-0.50.30.30.60.30.41.60.61.01.6
Percentage of Revenues eqr:Other eqr:NonSameStoreAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:SanDiego, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4.5454.639-0.66.3586.16.3176.1046.4475.9586.1276.0396.2335.7885.9645.6585.8815.736
Percentage of OperatingExpenses115.454.8-4.2122.764.446.420.8107.644.540.328.139.737.230.227.339.329.0
Percentage of Revenues0.00.00.00.00.00.90.90.90.90.90.91.00.90.90.90.90.9
Percentage of Revenues eqr:SanDiego eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:SanFrancisco, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3133293129302831293025292729262928
Percentage of OperatingExpenses806.1392.8205.6605.2306.7225.598.8524.7219.0200.3117.6186.3177.4148.9129.1197.3144.0
Percentage of Revenues0.00.00.00.00.04.54.24.64.44.63.94.54.34.64.24.74.6
Percentage of Revenues eqr:SanFrancisco eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:Seattle, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1919161918171416151313141413121313
Percentage of OperatingExpenses491.7233.7117.1368.2194.1128.049.5268.5112.589.162.390.090.870.161.789.967.7
Percentage of Revenues0.00.00.00.00.02.62.12.32.22.02.12.22.22.22.02.22.2
Percentage of Revenues eqr:Seattle eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:SouthernCalifornia, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4750414947494549454641424044384039
Percentage of OperatingExpenses1204.0592.3288.9963.6497.1363.3154.2826.0341.6308.2193.6271.8259.8223.2188.0272.9199.4
Percentage of Revenues0.00.00.00.00.07.26.67.26.87.16.46.56.37.06.26.56.4
Percentage of Revenues eqr:SouthernCalifornia eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

stpr:DC, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3133293228322334343432343333313332
Percentage of OperatingExpenses803.3393.3205.1622.6302.9235.481.0580.7254.5228.3152.4221.0213.8171.6152.8223.7163.1
Percentage of Revenues0.00.00.00.00.04.73.55.15.15.25.05.35.25.45.05.45.3
Percentage of Revenues stpr:DC eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

stpr:NY, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4953495048504648464945454645414243
Percentage of OperatingExpenses1264.8626.5346.4968.7508.3374.2159.6806.0345.9323.2210.7287.5300.3230.5202.6284.8220.0
Percentage of Revenues0.00.00.00.00.07.56.87.06.97.46.96.97.37.26.76.87.1
Percentage of Revenues stpr:NY eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value3761353561823564224083683692092192242171962142172102042242092062162862572462182502432281992201217111714818416514616215114613393121115112126122120126
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.061.959.853.855.231.733.634.434.031.134.134.934.433.837.034.534.635.040.837.036.332.737.736.635.031.535.019.311.221.828.933.130.527.731.629.529.425.620.526.725.824.20.00.00.00.0

us-gaap:OperatingIncomeLoss dei:LegalEntity

eqr:ERPOP


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value376135356182356422408368369209219224217196214217210204224209206216286257246218250243
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.1100.0100.0
Percentage of Revenues0.00.00.00.00.061.959.853.855.231.733.634.434.031.134.134.934.433.837.034.534.635.040.837.036.332.837.736.6
Percentage of Revenues eqr:ERPOP0.00.00.00.00.061.90.053.855.231.70.034.434.031.10.034.934.433.80.034.534.635.00.037.036.332.80.036.6

us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments

eqr:NonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value5.111-3.6583414202059292524353124224621212634162241
Percentage of OperatingIncomeLoss1.4-2.79.67.85.84.814.48.06.911.716.114.011.211.521.710.010.113.015.48.010.719.4
Percentage of Revenues0.00.00.00.00.03.08.64.33.83.75.44.83.83.67.43.53.54.45.72.83.76.8
Percentage of Revenues eqr:NonSameStoreAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value387380377399433448420453444431421423421410403413404392395403399384
Percentage of OperatingIncomeLoss102.9280.9106.0219.3121.4106.2102.9123.0120.3205.4192.2188.3193.9208.3187.7189.8192.0192.3176.4192.8193.7177.7
Percentage of Revenues0.00.00.00.00.065.761.566.166.365.164.664.865.964.863.966.266.065.065.366.667.162.2
Percentage of Revenues eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:SameStoreNonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value392377412414454468479482469455456454446432449435425419429420421426
Percentage of OperatingIncomeLoss104.3278.2115.6227.0127.2111.1117.3131.0127.1217.1208.2202.4205.1219.8209.4199.8202.1205.3191.8200.7204.5197.0
Percentage of Revenues0.00.00.00.00.068.770.270.470.168.870.069.769.868.471.369.769.569.571.069.370.868.9
Percentage of Revenues eqr:SameStoreNonSameStoreAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

eqr:Boston, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3937394043454243424142414140414041
Percentage of OperatingIncomeLoss10.427.511.122.112.110.810.411.711.519.919.318.419.220.419.318.519.5
Percentage of Revenues0.00.00.00.00.06.76.26.36.36.36.56.46.56.36.66.56.7
Percentage of Revenues eqr:Boston eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:Denver, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value6.9326.3134.2154.3773.3254.6764.5723.381
Percentage of OperatingIncomeLoss1.84.72.31.20.81.31.21.6
Percentage of Revenues0.00.00.00.00.50.70.70.5
Percentage of Revenues eqr:Denver eqr:SameStore0.00.00.00.00.00.00.00.0

eqr:LosAngeles, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7677767882858485838075777378737471
Percentage of OperatingIncomeLoss20.456.921.642.923.320.120.623.322.638.534.434.433.840.134.234.334.0
Percentage of Revenues0.00.00.00.00.012.512.312.512.512.211.611.811.512.511.612.011.7
Percentage of Revenues eqr:LosAngeles eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:NonSameStore, eqr:NonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2.8343.21519131720412225263829261024118.657
Percentage of OperatingIncomeLoss0.82.45.67.24.94.910.16.16.812.417.612.912.15.211.65.24.1
Percentage of Revenues0.00.00.00.00.03.06.03.33.73.95.94.54.11.64.01.81.4
Percentage of Revenues eqr:NonSameStore eqr:NonSameStoreAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:OrangeCounty, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2019201920202020201917171718171616
Percentage of OperatingIncomeLoss5.514.45.710.85.74.95.15.55.49.38.17.87.99.58.07.87.9
Percentage of Revenues0.00.00.00.00.03.03.03.03.03.02.72.72.73.02.72.72.7
Percentage of Revenues eqr:OrangeCounty eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:Other, eqr:NonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2.277-6.873141.0563.369-0.171176.9210.383-1.606-3.3372.459-1.8281.808107.8432.17
Percentage of OperatingIncomeLoss0.6-5.14.10.60.9-0.04.31.90.1-0.8-1.51.1-0.80.94.73.61.0
Percentage of Revenues0.00.00.00.00.0-0.02.61.00.1-0.2-0.50.4-0.30.31.61.30.4
Percentage of Revenues eqr:Other eqr:NonSameStoreAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:SanDiego, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value14143.9071717171717171717161716161616
Percentage of OperatingIncomeLoss3.910.41.19.44.94.24.44.84.88.27.97.67.98.47.87.67.7
Percentage of Revenues0.00.00.00.00.02.62.62.62.72.62.62.62.72.62.72.72.6
Percentage of Revenues eqr:SanDiego eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:SanFrancisco, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7272758187919195949186878787818383
Percentage of OperatingIncomeLoss19.253.221.144.924.421.622.426.025.543.539.439.040.344.738.138.439.6
Percentage of Revenues0.00.00.00.00.013.413.414.014.013.813.213.413.713.913.013.413.6
Percentage of Revenues eqr:SanFrancisco eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:Seattle, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4141424144473844403735363435353634
Percentage of OperatingIncomeLoss10.930.912.022.612.611.39.312.010.917.716.316.216.018.116.616.516.2
Percentage of Revenues0.00.00.00.00.07.05.66.56.05.65.55.65.55.65.75.85.6
Percentage of Revenues eqr:Seattle eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:SouthernCalifornia, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value112110100115120123123123121117110111107114107108104
Percentage of OperatingIncomeLoss29.781.728.363.133.929.230.133.632.856.150.449.749.658.050.049.749.6
Percentage of Revenues0.00.00.00.00.018.118.018.118.117.816.917.116.918.017.017.317.0
Percentage of Revenues eqr:SouthernCalifornia eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

stpr:DC, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6765656768715876787676747574767574
Percentage of OperatingIncomeLoss17.948.518.536.919.317.014.320.921.336.234.833.334.737.935.434.635.6
Percentage of Revenues0.00.00.00.00.010.58.511.211.711.511.711.511.811.812.112.112.2
Percentage of Revenues stpr:DC eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

stpr:NY, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4846504963656669676669707367717276
Percentage of OperatingIncomeLoss12.934.414.127.417.915.616.418.818.231.931.831.433.934.433.433.136.3
Percentage of Revenues0.00.00.00.00.09.69.810.110.010.110.710.811.510.711.411.612.5
Percentage of Revenues stpr:NY eqr:SameStore0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value2.3342.303175.8775.5414.6676.5295.757-14.836-10.027-14.2971610106.0626.4778.1754.5834.8214.7812.682255.0046.83516-7.87-7.3462.184-4.096-7.73214-2.54815104.6060.321-8.1026.745-11.686-104.479
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.71.00.8-2.2-1.5-2.22.51.61.71.01.01.30.80.80.80.54.20.71.02.4-1.2-1.10.3-0.6-1.22.3-0.42.52.00.90.1-1.51.3-2.3-20.4

us-gaap:OtherComprehensiveIncomeLossNetOfTax dei:LegalEntity

eqr:ERPOP


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value2.3342.303175.8775.5414.6676.5295.757-14.836-10.027-14.2971610106.0626.4778.1754.5834.8214.7812.682255.0046.83516-7.87-7.3462.184
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.71.00.8-2.2-1.5-2.22.51.61.71.01.01.30.80.80.80.54.20.71.02.4-1.2-1.10.3
Percentage of Revenues eqr:ERPOP0.00.00.00.00.00.70.00.8-2.2-1.50.02.51.61.70.01.01.30.80.00.80.54.20.01.02.4-1.20.00.3

Preferred Stock Dividends Income Statement Impact

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:PreferredStockDividendsIncomeStatementImpact


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value772000.0773000.0772000.0773000.0772000.0773000.0772000.0773000.0772000.0773000.0772000.0773000.0772000.0773000.0773000.0772000.0773000.0773000.0773000.0773000.0772000.0
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value328602629527133230127732110912222311822013014420414930221722837312132052981902272311178211539133610613842361081521071125811331982910574714310585
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.048.844.140.648.016.518.734.318.534.820.623.133.324.849.935.938.4602.830.429.544.028.534.234.818.013.118.462.253.0196.874.842.519.928.821.022.1116.825.643.66.62.312.40.00.00.00.0

us-gaap:ProfitLoss dei:LegalEntity

eqr:ERPOP


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value32860262952713323012773211091222231182201301442041493022172283731213205298190227231
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.048.844.140.648.016.518.734.318.534.820.623.133.324.849.935.938.4602.830.429.544.028.534.234.8
Percentage of Revenues eqr:ERPOP0.00.00.00.00.048.80.040.648.016.50.034.318.534.80.023.133.324.80.035.938.4602.80.029.544.028.50.034.8

us-gaap:ProfitLoss dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:ERPOP, us-gaap:PartiallyOwnedProperties


Profit
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.7410.6820.88120.8470.830.8210.7990.7790.750.5090.68-0.0310.8010.7650.788
Percentage of ProfitLoss0.21.10.33.80.30.30.30.70.60.30.40.3-0.00.60.40.5
Percentage of Revenues0.00.00.01.80.10.10.10.10.10.10.10.1-0.00.10.10.1
Percentage of Revenues eqr:ERPOP us-gaap:PartiallyOwnedProperties0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2046420169202862062320714209192117221054209902076820394205422040620383205702069720636206082070421297212292130123157230082308123029229502300822991228892283423811234822379517201166681671416481166591575616398160751618415417
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value93829207918495759540979510164101521017510069961596939600950497299823973097339801105179344947111894117811174811813117421186011922117641162612512124351297392751004010157100051038095231008410256105929984
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets45.845.745.346.446.146.848.048.248.548.547.147.247.046.647.347.547.247.247.349.444.044.551.451.250.951.351.251.551.951.450.952.553.054.553.960.260.860.762.360.461.563.865.464.8

us-gaap:Liabilities dei:LegalEntity

eqr:ERPOP


Liabilitiesdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value938292079184957595409795101641015210175100699615969396009504972998239730973398011051793449471118941178111742
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets45.845.745.346.446.146.848.048.248.548.547.147.247.046.647.347.547.247.247.349.444.044.551.451.251.2
Percentage of Assets eqr:ERPOP45.845.745.346.446.146.848.048.248.548.547.147.247.046.647.347.547.247.247.349.444.044.551.451.251.2

us-gaap:Liabilities us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value242237224210236332323313
Percentage of Liabilities2.62.62.42.22.53.43.23.3
Percentage of Assets1.21.21.11.01.11.61.51.5
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary31.130.528.627.531.444.642.844.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2046420169202862062320714209192117221054209902076820394205422040620383205702069720636206082070421297212292130123157230082308123029229502300822991228892283423811234822379517201166681671416481166591575616398160751618415417
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity dei:LegalEntity

eqr:ERPOP


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value20464201692028620623207142091921172210542099020768203942054220406203832057020697206362060820704212972122921301231572300822950
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets eqr:ERPOP100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value104331031410525105171059710530103151018210153100461017310235102081028910242102591029010280102291011511160110631047010478105001033110368103781028910376105071059810322101237289599058855822566957355750527850905047
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets51.051.151.951.051.250.348.748.448.448.449.949.850.050.549.849.649.949.949.447.552.651.945.245.545.544.945.245.144.845.346.044.544.042.542.435.935.235.334.036.435.132.831.532.7

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value-39.029-41.363-43.666-61.478-67.355-72.896-77.563-84.092-89.849-75.013-64.986-50.689-67.31-77.734-88.612-94.674-101.151-109.326-113.909-118.73-123.511-126.193-152.016-157.02-163.855-180.022-172.152-164.806-166.99-162.894-155.162-169.392-166.844-182.508-193.148-197.754-198.075-189.973-196.718-57.818
Percentage of StockholdersEquity-0.4-0.4-0.4-0.6-0.6-0.7-0.8-0.8-0.9-0.7-0.6-0.5-0.7-0.8-0.9-0.9-1.0-1.1-1.1-1.2-1.1-1.1-1.5-1.5-1.6-1.7-1.7-1.6-1.6-1.6-1.5-1.6-1.6-1.8-2.6-3.3-3.4-3.3-3.5-1.1
Percentage of Assets-0.2-0.2-0.2-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.3-0.2-0.3-0.4-0.4-0.5-0.5-0.5-0.6-0.6-0.6-0.6-0.7-0.7-0.7-0.8-0.8-0.7-0.7-0.7-0.7-0.7-0.7-0.8-1.1-1.2-1.2-1.2-1.2-0.4
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value911090839128916691189092896589178949892589358900890589108886884888388846875887418718865885728584860785398536857485278541856185428496849265425364522650474741
Percentage of StockholdersEquity87.388.186.787.286.086.386.987.688.188.887.887.087.286.686.886.385.986.185.686.478.178.381.981.982.082.782.382.682.982.381.580.682.383.989.789.688.889.093.2
Percentage of Assets44.545.045.044.444.043.542.342.442.643.043.843.343.643.743.242.842.842.942.341.041.140.637.037.337.337.137.237.337.137.337.535.936.235.738.032.231.330.329.3
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value3.7443.7293.7233.7223.7223.7213.7173.7133.7083.7053.6943.6843.6833.6823.683.6753.6733.6713.6593.6573.6563.6553.6483.6413.6413.643.6293.6223.6163.6113.6053.6043.6033.6013.2513.0273.012.9752.902
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value373737373737373737373737373737373737373737373740404050505050505050505050200200200
Percentage of StockholdersEquity0.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.30.30.40.40.40.40.50.50.50.50.50.50.50.50.70.83.43.53.9
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.31.21.21.2
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value1321123113991371150514691386130812521155126113441329141514031464151115011543145125242490200920072012192819501915187519442047217119391759887770654615203
Percentage of StockholdersEquity12.711.913.313.014.214.013.412.812.311.512.413.113.013.813.714.314.714.615.114.322.622.519.219.219.218.718.818.518.218.719.520.518.817.412.212.911.110.94.0
Percentage of Assets6.56.16.96.77.37.06.56.26.05.66.26.56.56.96.87.17.37.37.56.811.911.78.78.78.78.48.58.38.28.59.09.18.37.45.24.63.93.71.3
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value393542178187824528251294732344450463742775174973684237924940317637539721525661245442193834560430643143476019389050
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.90.90.40.20.11.20.10.20.20.20.20.20.20.20.20.42.42.31.70.20.20.40.20.20.10.30.20.24.10.60.23.60.30.31.32.30.33.71.92.70.00.00.01.30.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue dei:LegalEntity

eqr:ERPOP


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312012-12-31
Value3935421781878245282512947323444504637427751749736842379249403153612
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.90.90.40.20.11.20.10.20.20.20.20.20.20.20.20.42.42.31.70.20.20.40.20.20.10.23.6
Percentage of Assets eqr:ERPOP0.20.20.20.90.90.40.20.11.20.10.20.20.20.20.20.20.20.20.42.42.31.70.20.20.00.00.20.00.00.0

Land

us-gaap:Land

us-gaap:Land


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value57805785578557945789588359365955588959185875586659865960599659855927590258995874583557775864642463746357629563296296628161926201626463194554460945654384436741584161410741103650
Percentage of Land100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.228.728.528.127.928.128.028.328.128.528.828.629.329.229.128.928.728.628.527.627.527.125.327.927.627.627.427.527.427.427.126.026.726.626.527.727.326.626.226.425.425.625.423.7

us-gaap:Land dei:LegalEntity

eqr:ERPOP


Landdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value5780578557855794578958835936595558895918587558665986596059965985592759025899587458355777586464246295
Percentage of Land100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.228.728.528.127.928.128.028.328.128.528.828.629.329.229.128.928.728.628.527.627.527.125.327.927.4
Percentage of Assets eqr:ERPOP28.228.728.528.127.928.128.028.328.128.528.828.629.329.229.128.928.728.628.527.627.527.125.327.927.4

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value53535254555552525262585758595859595960606566687494891051281422051781651881931717171412113.6233.5333.1676.995
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.30.30.20.20.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.40.40.50.60.60.90.80.70.80.80.10.10.10.10.10.10.00.00.00.0

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures dei:LegalEntity

eqr:ERPOP


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value535352545555525252625857585958595959606065666874105
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.30.30.20.20.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.5
Percentage of Assets eqr:ERPOP0.30.30.30.30.30.30.20.20.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.5

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4995124814314340.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.00.0
Percentage of Assets2.52.42.32.12.10.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:PropertyPlantAndEquipmentByType

eqr:CorporateOffice


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value3941431516
Percentage of OperatingLeaseRightOfUseAsset7.98.19.13.63.7
Percentage of Assets0.20.20.20.10.1
Percentage of Assets eqr:CorporateOffice0.00.00.00.00.0

us-gaap:Land


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value402413414416418
Percentage of OperatingLeaseRightOfUseAsset80.680.686.196.496.3
Percentage of Assets2.02.02.02.02.0
Percentage of Assets us-gaap:Land0.00.00.00.00.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value296290291257282226233249227241404465433444425445445413398421398422422405383384383396409384404379390358170164161129187149151133148213
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.41.41.21.41.11.11.21.11.22.02.32.12.22.12.22.22.01.92.01.92.01.81.81.71.71.71.71.81.71.81.61.71.51.01.01.00.81.10.90.90.80.91.4

us-gaap:OtherAssets dei:LegalEntity

eqr:ERPOP


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value296290291257282226233249227241404465433444425445445413398421398422422405383
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.41.41.21.41.11.11.21.11.22.02.32.12.22.12.22.22.01.92.01.92.01.81.81.7
Percentage of Assets eqr:ERPOP1.41.41.41.21.41.11.11.21.11.22.02.32.12.22.12.22.22.01.92.01.92.01.81.81.7

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-31
Value8126
Percentage of LongTermDebt100.0
Percentage of Assets40.1

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value208237237236239240229224226219226231231235231234235235231223246244225226343342339339338342337324316311237223218196193119125123118127
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.21.21.11.21.11.11.11.11.11.11.11.11.21.11.11.11.11.11.01.21.11.01.01.51.51.51.51.51.51.51.41.31.31.41.31.31.21.20.80.80.80.70.8

us-gaap:MinorityInterest us-gaap:StatementEquityComponents

eqr:PartiallyOwned


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value2.3652.4724.6734.374.6344.7391.183-1.702-1.298-5.462-2.293-2.158-1.6461.2934.7086.1756.3036.388104.608124
Percentage of MinorityInterest1.11.02.01.81.92.00.5-0.8-0.6-2.5-1.0-0.9-0.70.52.02.62.72.74.62.036.8
Percentage of Assets0.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.00.00.10.00.5
Percentage of Assets eqr:PartiallyOwned0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value205234233232235235227226227225228233232234226228229228221219241240221221214
Percentage of MinorityInterest98.999.098.098.298.198.099.5100.8100.6102.5101.0100.9100.799.598.097.497.397.395.498.198.398.298.097.963.2
Percentage of Assets1.01.21.11.11.11.11.11.11.11.11.11.11.11.21.11.11.11.11.11.01.11.11.01.00.9
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value16
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value16
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value17
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value17
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value954
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets4.7

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3293313332812820.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.00.0
Percentage of Assets1.61.61.61.31.40.0

us-gaap:OperatingLeaseLiability us-gaap:PropertyPlantAndEquipmentByType

eqr:CorporateOffice


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value4043451617
Percentage of OperatingLeaseLiability12.313.013.66.06.2
Percentage of Assets0.20.20.20.10.1
Percentage of Assets eqr:CorporateOffice0.00.00.00.00.0

us-gaap:Land


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value265264264264264
Percentage of OperatingLeaseLiability80.680.079.594.093.8
Percentage of Assets1.31.31.31.31.3
Percentage of Assets us-gaap:Land0.00.00.00.00.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-312019-06-30
Value10391026
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0
Percentage of Assets5.14.9

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value104331031410525105171059710530103151018210153100461017310235102081028910242102591029010280102291011511160110631047010478105001033110368103781028910376105071059810322101237289599058855822566957355750527850905047
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets51.051.151.951.051.250.348.748.448.448.449.949.850.050.549.849.649.949.949.447.552.651.945.245.545.544.945.245.144.845.346.044.544.042.542.435.935.235.334.036.435.132.831.532.7

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value-39.029-41.363-43.666-61.478-67.355-72.896-77.563-84.092-89.849-75.013-64.986-50.689-67.31-77.734-88.612-94.674-101.151-109.326-113.909-118.73-123.511-126.193-152.016-157.02-163.855-180.022-172.152-164.806-166.99-162.894-155.162-169.392-166.844-182.508-193.148-197.754-198.075-189.973-196.718-57.818
Percentage of StockholdersEquity-0.4-0.4-0.4-0.6-0.6-0.7-0.8-0.8-0.9-0.7-0.6-0.5-0.7-0.8-0.9-0.9-1.0-1.1-1.1-1.2-1.1-1.1-1.5-1.5-1.6-1.7-1.7-1.6-1.6-1.6-1.5-1.6-1.6-1.8-2.6-3.3-3.4-3.3-3.5-1.1
Percentage of Assets-0.2-0.2-0.2-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.3-0.2-0.3-0.4-0.4-0.5-0.5-0.5-0.6-0.6-0.6-0.6-0.7-0.7-0.7-0.8-0.8-0.7-0.7-0.7-0.7-0.7-0.7-0.8-1.1-1.2-1.2-1.2-1.2-0.4
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value911090839128916691189092896589178949892589358900890589108886884888388846875887418718865885728584860785398536857485278541856185428496849265425364522650474741
Percentage of StockholdersEquity87.388.186.787.286.086.386.987.688.188.887.887.087.286.686.886.385.986.185.686.478.178.381.981.982.082.782.382.682.982.381.580.682.383.989.789.688.889.093.2
Percentage of Assets44.545.045.044.444.043.542.342.442.643.043.843.343.643.743.242.842.842.942.341.041.140.637.037.337.337.137.237.337.137.337.535.936.235.738.032.231.330.329.3
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value3.7443.7293.7233.7223.7223.7213.7173.7133.7083.7053.6943.6843.6833.6823.683.6753.6733.6713.6593.6573.6563.6553.6483.6413.6413.643.6293.6223.6163.6113.6053.6043.6033.6013.2513.0273.012.9752.902
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value373737373737373737373737373737373737373737373740404050505050505050505050200200200
Percentage of StockholdersEquity0.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.30.30.40.40.40.40.50.50.50.50.50.50.50.50.70.83.43.53.9
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.31.21.21.2
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value1321123113991371150514691386130812521155126113441329141514031464151115011543145125242490200920072012192819501915187519442047217119391759887770654615203
Percentage of StockholdersEquity12.711.913.313.014.214.013.412.812.311.512.413.113.013.813.714.314.714.615.114.322.622.519.219.219.218.718.818.518.218.719.520.518.817.412.212.911.110.94.0
Percentage of Assets6.56.16.96.77.37.06.56.26.05.66.26.56.56.96.87.17.37.37.56.811.911.78.78.78.78.48.58.38.28.59.09.18.37.45.24.63.93.71.3
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value106421055210763107541083710770105441040610379102661039910467104391052510473104931052510515104601033811406113081069610704108441067310707107171062810719108451092210638104357527621361046018586258545875540252085174
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.052.353.152.152.351.549.849.449.449.451.051.051.251.650.950.751.051.050.548.553.753.146.246.547.046.346.746.646.246.847.545.945.343.943.837.336.536.535.237.235.833.632.233.6

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3744000.03729000.03723000.03722000.03722000.03721000.03717000.03713000.03708000.03705000.03694000.03684000.03683000.03682000.03680000.03675000.03673000.03671000.03659000.03657000.03656000.03655000.03648000.03641000.03641000.03640000.03629000.03622000.03616000.03611000.03605000.03604000.03603000.03601000.03251000.03027000.03010000.03005000.02975000.02966000.02963000.02945000.02902000.02800000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value91109083912891669118909289658917894989258935890089058910888688488838884687588741871886588572858486078539853685748527854185618542849684926542536452265152504750324947489847414477
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets44.545.045.044.444.043.542.342.442.643.043.843.343.643.743.242.842.842.942.341.041.140.637.037.337.337.137.237.337.137.337.535.936.235.738.032.231.331.330.331.930.230.529.329.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1321123113991371150514691386130812521155126113441329141514031464151115011543145125242490200920072012192819501915187519442047217119391759887770654656615684680228203353
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.56.16.96.77.37.06.56.26.05.66.26.56.56.96.87.17.37.37.56.811.911.78.78.78.78.48.58.38.28.59.09.18.37.45.24.63.94.03.74.34.21.41.32.3

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-39029000.0-41363000.0-43666000.0-61478000.0-67355000.0-72896000.0-77563000.0-84092000.0-89849000.0-75013000.0-64986000.0-50689000.0-67310000.0-77734000.0-88612000.0-94674000.0-101150000.0-109330000.0-113910000.0-118730000.0-123510000.0-126190000.0-152020000.0-157020000.0-163860000.0-180020000.0-172150000.0-164810000.0-166990000.0-162890000.0-155160000.0-169390000.0-166840000.0-182510000.0-193150000.0-197750000.0-198080000.0-189970000.0-196720000.0-185030000.0-80553000.0-50634000.0-57818000.04681000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.2-0.2-0.2-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.3-0.2-0.3-0.4-0.4-0.5-0.5-0.5-0.6-0.6-0.6-0.6-0.7-0.7-0.7-0.8-0.8-0.7-0.7-0.7-0.7-0.7-0.7-0.8-1.1-1.2-1.2-1.2-1.2-1.2-0.5-0.3-0.40.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax dei:LegalEntity

eqr:ERPOP


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value-39029000.0-41363000.0-43666000.0-61478000.0-67355000.0-72896000.0-77563000.0-84092000.0-89849000.0-75013000.0-64986000.0-50689000.0-67310000.0-77734000.0-88612000.0-94674000.0-101150000.0-109330000.0-113910000.0-118730000.0-123510000.0-126190000.0-152020000.0-157020000.0-172150000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.2-0.2-0.2-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.3-0.2-0.3-0.4-0.4-0.5-0.5-0.5-0.6-0.6-0.6-0.6-0.7-0.7-0.8
Percentage of Assets eqr:ERPOP-0.2-0.2-0.2-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.3-0.2-0.3-0.4-0.4-0.5-0.5-0.5-0.6-0.6-0.6-0.6-0.7-0.7-0.8

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value208237237236239240229224226219226231231235231234235235231223246244225226343342339339338342337324316311237223218196193119125123118127
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.21.21.11.21.11.11.11.11.11.11.11.11.21.11.11.11.11.11.01.21.11.01.01.51.51.51.51.51.51.51.41.31.31.41.31.31.21.20.80.80.80.70.8

us-gaap:MinorityInterest us-gaap:StatementEquityComponents

eqr:PartiallyOwned


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value2.3652.4724.6734.374.6344.7391.183-1.702-1.298-5.462-2.293-2.158-1.6461.2934.7086.1756.3036.388104.608124
Percentage of MinorityInterest1.11.02.01.81.92.00.5-0.8-0.6-2.5-1.0-0.9-0.70.52.02.62.72.74.62.036.8
Percentage of Assets0.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.00.00.10.00.5
Percentage of Assets eqr:PartiallyOwned0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value205234233232235235227226227225228233232234226228229228221219241240221221214
Percentage of MinorityInterest98.999.098.098.298.198.099.5100.8100.6102.5101.0100.9100.799.598.097.497.397.395.498.198.398.298.097.963.2
Percentage of Assets1.01.21.11.11.11.11.11.11.11.11.11.11.11.21.11.11.11.11.11.01.11.11.01.00.9
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

eqr:ERPOP, us-gaap:PartiallyOwnedProperties


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.8482.8830.4391.0430.9859.3150.7051.2341.2513.9680.9011.2623.4484.221.4360.9290.855.134
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets eqr:ERPOP us-gaap:PartiallyOwnedProperties0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

eqr:PartiallyOwned


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.8482.8830.4391.0430.9859.3150.7051.2341.2513.9680.9011.2623.4484.221.4360.9290.855.134
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets eqr:PartiallyOwned0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value7.418.5897.9517.9637.9619.0767.4037.4147.4747.6057.1227.1867.1867.1886.6666.6876.696.6967.218507.2581227.885
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders873.8297.91811.2763.5808.297.41050.1600.8597.4191.7790.5569.4208.4170.3464.2719.8787.1130.40.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value230346231399252382362403317373312358324361302413256293292344273201293388327347309394282336101349224193183276350235184221204187172203204152
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.056.153.058.947.456.447.854.950.757.048.066.241.948.548.356.846.032.541.755.848.252.246.659.443.353.216.155.535.335.935.749.864.544.536.043.341.136.037.944.945.732.7

us-gaap:NetCashProvidedByUsedInOperatingActivities dei:LegalEntity

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value230346231399252382362403317373312358324361302413256293292344273201293388327347309
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.056.153.058.947.456.447.854.950.757.048.066.241.948.548.356.846.032.541.755.848.252.246.6
Percentage of Revenues eqr:ERPOP0.00.00.00.00.056.153.058.947.456.447.854.950.757.048.066.241.948.548.356.846.032.541.755.848.252.246.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value70-126.345247-148.889299266-113.644-289.025-22.12-347.035-108.014-184.644-231.474147-113.499-254.34-153.422-73.035119-119.8421205751-267.759-205.163-26.327-179.22211-160.965-190.899-304.279-64.815620479-1041.57312111-310.853-82.684-563.05-35.844442-38.006266-425.888-211.807-274.834
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.039.0-16.6-42.2-3.3-52.4-16.5-28.3-36.223.3-18.0-40.8-25.0-12.119.8-19.820.3929.0-38.1-29.5-3.9-26.91.7-24.2-29.3-48.0-10.398.675.4-193.223.62.1-57.2-15.7-109.9-7.088.8-7.358.6-93.8-47.3-59.1

us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value70-126.345247-148.889299266-113.644-289.025-22.12-347.035-108.014-184.644-231.474147-113.499-254.34-153.422-73.035119-119.8421205751-267.759-205.163-26.327-179.2225.976
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.052.1
Percentage of Revenues0.00.00.00.00.039.0-16.6-42.2-3.3-52.4-16.5-28.3-36.223.3-18.0-40.8-25.0-12.119.8-19.820.3929.0-38.1-29.5-3.9-26.90.9
Percentage of Revenues eqr:ERPOP0.00.00.00.00.039.0-16.6-42.2-3.3-52.4-16.5-28.3-36.223.3-18.0-40.8-25.0-12.119.8-19.820.3929.0-38.1-29.5-3.9-26.90.9

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-6.397-221.6-613.826-260.668-447.21-624.689-216.757-339.254-79.146-49.317-176.527-174.22-98.796-514.367-276.939-149.815-107.747-255.317-852.355-204.66-264.671-5626.845-20.484-237.879-258.134-159.335-312.677-278.424-52.811-48.949-956.235-149.463-606.853291262-287.409-215.176-316.636716-744.508-348.329-274.858-50.679217-5.024-10.388
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.0-91.6-31.7-49.5-11.8-7.4-27.0-26.7-15.4-81.3-43.9-24.0-17.6-42.3-140.8-33.8-44.5-908.9-2.9-34.2-38.0-23.9-47.0-41.9-8.1-7.7-151.6-23.7-95.654.151.1-51.7-39.6-60.0139.9-145.4-69.9-52.8-11.247.9-1.1-2.2

us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-6.397-221.6-613.826-260.668-447.21-624.689-216.757-339.254-79.146-49.317-176.527-174.22-98.796-514.367-276.939-149.815-107.747-255.317-852.355-204.66-264.671-5626.845-20.484-237.879-258.134-159.335-307.176
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.098.2
Percentage of Revenues0.00.00.00.00.0-91.6-31.7-49.5-11.8-7.4-27.0-26.7-15.4-81.3-43.9-24.0-17.6-42.3-140.8-33.8-44.5-908.9-2.9-34.2-38.0-23.9-46.2
Percentage of Revenues eqr:ERPOP0.00.00.00.00.0-91.6-31.7-49.5-11.8-7.4-27.0-26.7-15.4-81.3-43.9-24.0-17.6-42.3-140.8-33.8-44.5-908.9-2.9-34.2-38.0-23.9-46.2

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.9392.1852.6862.1012.1112.0413.0062.8813.6472.1362.2563.2762.0993.6792.0792.0642.0872.2962.6332.2612.3455.3943.0672.6072.5382.589-19.6422.6283.1342.7926.5614.3354.3537.023113.3384.0632.9744.8774.7214.4443.0232.642.4372.32.996
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCosts dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1.9392.1852.6862.1012.1112.0413.0062.8813.6472.1362.2563.2762.0993.6792.0792.0642.0872.2962.6332.2612.3455.3943.0672.6072.5382.5892.5342.628
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-12.9100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value230346231399252382362403317373312358324361302413256293292344273201293388327347309394282336101349224193183276350235184221204187172203204152
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.056.153.058.947.456.447.854.950.757.048.066.241.948.548.356.846.032.541.755.848.252.246.659.443.353.216.155.535.335.935.749.864.544.536.043.341.136.037.944.945.732.7

us-gaap:NetCashProvidedByUsedInOperatingActivities dei:LegalEntity

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value230346231399252382362403317373312358324361302413256293292344273201293388327347309
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.056.153.058.947.456.447.854.950.757.048.066.241.948.548.356.846.032.541.755.848.252.246.6
Percentage of Revenues eqr:ERPOP0.00.00.00.00.056.153.058.947.456.447.854.950.757.048.066.241.948.548.356.846.032.541.755.848.252.246.6

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value31657252912603082892673081041172141132111251381961432772082183587204196286182217221112791103773241017367226103145102107555127189289.96155
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.045.242.439.046.115.818.032.917.833.519.922.132.023.845.834.436.8579.529.128.242.227.432.833.417.312.517.659.951.1188.871.440.719.027.520.021.1111.624.541.76.32.211.9

us-gaap:NetIncomeLoss dei:LegalEntity

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value32759262942703203002773201081212231172191301432031492882162273731212204297189226230
Percentage of NetIncomeLoss103.4103.7103.7103.7103.7103.7103.7103.7103.7103.7103.8103.8103.8103.8103.7103.7103.8103.8104.0104.0104.0104.0103.9104.0104.0103.9103.9103.9
Percentage of Revenues0.00.00.00.00.046.943.940.447.916.418.634.218.434.720.623.033.224.747.635.738.2602.730.229.443.828.434.034.7
Percentage of Revenues eqr:ERPOP0.00.00.00.00.046.943.940.447.916.418.634.218.434.720.623.033.224.747.635.738.2602.730.229.443.828.434.034.7

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value31657252912603082892673081041172141132111251381961432772082183587204196286182217221112791103773241017367226103145102107555127
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.045.242.439.046.115.818.032.917.833.519.922.132.023.845.834.436.8579.529.128.242.227.432.833.417.312.517.659.951.1188.871.440.719.027.520.021.1111.624.5
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value328602629527133230127732110912222311822013014420414930221722837312132052981902272311178211539133610613842361081521071125811331982910574714310585
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.048.844.140.648.016.518.734.318.534.820.623.133.324.849.935.938.4602.830.429.544.028.534.234.818.013.118.462.253.0196.874.842.519.928.821.022.1116.825.643.66.62.312.40.00.00.00.0

us-gaap:ProfitLoss dei:LegalEntity

eqr:ERPOP


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value32860262952713323012773211091222231182201301442041493022172283731213205298190227231
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.048.844.140.648.016.518.734.318.534.820.623.133.324.849.935.938.4602.830.429.544.028.534.234.8
Percentage of Revenues eqr:ERPOP0.00.00.00.00.048.844.140.648.016.518.734.318.534.820.623.133.324.849.935.938.4602.830.429.544.028.534.234.8

us-gaap:ProfitLoss dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:ERPOP, us-gaap:PartiallyOwnedProperties


Profit
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.7410.6820.88120.8470.830.8210.7990.7790.750.5090.68-0.0310.8010.7650.788
Percentage of ProfitLoss0.21.10.33.80.30.30.30.70.60.30.40.3-0.00.60.40.5
Percentage of Revenues0.00.00.01.80.10.10.10.10.10.10.10.1-0.00.10.10.1
Percentage of Revenues eqr:ERPOP us-gaap:PartiallyOwnedProperties0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.3998.6784.8994.85.6317.8443.6723.9956.9769.8064.8625.2386.754104.9984.9727.1547.8734.994.811109.9675.3385.25210132.8962.7428.924126.4556.9311103.9963.9587.918.9684.4554.3335.8656.5244.1593.795.1695.757
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation dei:LegalEntity

eqr:ERPOP


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value7.3998.6784.8994.85.6317.8443.6723.9956.9769.8064.8625.2386.754104.9984.9727.1547.8734.994.811109.9675.3385.25210132.896
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value70-126.345247-148.889299266-113.644-289.025-22.12-347.035-108.014-184.644-231.474147-113.499-254.34-153.422-73.035119-119.8421205751-267.759-205.163-26.327-179.22211-160.965-190.899-304.279-64.815620479-1041.57312111-310.853-82.684-563.05-35.844442-38.006266-425.888-211.807-274.834
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.039.0-16.6-42.2-3.3-52.4-16.5-28.3-36.223.3-18.0-40.8-25.0-12.119.8-19.820.3929.0-38.1-29.5-3.9-26.91.7-24.2-29.3-48.0-10.398.675.4-193.223.62.1-57.2-15.7-109.9-7.088.8-7.358.6-93.8-47.3-59.1

us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value70-126.345247-148.889299266-113.644-289.025-22.12-347.035-108.014-184.644-231.474147-113.499-254.34-153.422-73.035119-119.8421205751-267.759-205.163-26.327-179.2225.976
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.052.1
Percentage of Revenues0.00.00.00.00.039.0-16.6-42.2-3.3-52.4-16.5-28.3-36.223.3-18.0-40.8-25.0-12.119.8-19.820.3929.0-38.1-29.5-3.9-26.90.9
Percentage of Revenues eqr:ERPOP0.00.00.00.00.039.0-16.6-42.2-3.3-52.4-16.5-28.3-36.223.3-18.0-40.8-25.0-12.119.8-19.820.3929.0-38.1-29.5-3.9-26.90.9

Payments To Acquire Real Estate

us-gaap:PaymentsToAcquireRealEstate

us-gaap:PaymentsToAcquireRealEstate


Payments
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.03714943942580.050714654-0.001409-0.001450.0160171221306.72651391161480.00.01080.07924433718380715935112381423186498
Percentage of PaymentsToAcquireRealEstate0.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireRealEstate dei:LegalEntity

eqr:ERPOP


Payments
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.03714943942580.050714654-0.001409-0.001450.0160171221306.7265
Percentage of PaymentsToAcquireRealEstate0.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireRealEstate us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Payments
Period End2021-07-01
Value365
Percentage of PaymentsToAcquireRealEstate0.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-6.397-221.6-613.826-260.668-447.21-624.689-216.757-339.254-79.146-49.317-176.527-174.22-98.796-514.367-276.939-149.815-107.747-255.317-852.355-204.66-264.671-5626.845-20.484-237.879-258.134-159.335-312.677-278.424-52.811-48.949-956.235-149.463-606.853291262-287.409-215.176-316.636716-744.508-348.329-274.858-50.679217-5.024-10.388
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.0-91.6-31.7-49.5-11.8-7.4-27.0-26.7-15.4-81.3-43.9-24.0-17.6-42.3-140.8-33.8-44.5-908.9-2.9-34.2-38.0-23.9-47.0-41.9-8.1-7.7-151.6-23.7-95.654.151.1-51.7-39.6-60.0139.9-145.4-69.9-52.8-11.247.9-1.1-2.2

us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-6.397-221.6-613.826-260.668-447.21-624.689-216.757-339.254-79.146-49.317-176.527-174.22-98.796-514.367-276.939-149.815-107.747-255.317-852.355-204.66-264.671-5626.845-20.484-237.879-258.134-159.335-307.176
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.098.2
Percentage of Revenues0.00.00.00.00.0-91.6-31.7-49.5-11.8-7.4-27.0-26.7-15.4-81.3-43.9-24.0-17.6-42.3-140.8-33.8-44.5-908.9-2.9-34.2-38.0-23.9-46.2
Percentage of Revenues eqr:ERPOP0.00.00.00.00.0-91.6-31.7-49.5-11.8-7.4-27.0-26.7-15.4-81.3-43.9-24.0-17.6-42.3-140.8-33.8-44.5-908.9-2.9-34.2-38.0-23.9-46.2

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312015-12-31
Value1.8421.8711.9381.9481.9321.941183
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

eqr:SecuredConventional, eqr:FixedRateDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1.8421.8711.9381.9481.9321.941
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

eqr:FourPointSevenFourZeroMortgage, us-gaap:SubsequentEvent


Repayments
Period End2020-07-01
Value19
Percentage of RepaymentsOfLongTermDebt0.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value22422422422422421121021021019919819819818518518518418412801841843122201201201181181180180234144144144249102101101168100999913295959593
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsCommonStock dei:LegalEntity

eqr:ERPOP


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value22422422422422421121021021019919819819818518518518418412801841843122
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value56.9155.5252.3546.4642.0548.0446.1643.6741.31
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AdjustmentForLimitedPartnersOwnershipInOperatingPartnership dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:AdjustmentForLimitedPartnersOwnershipInOperatingPartnership

eqr:ERPOP, us-gaap:GeneralPartner


Adjustment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-31.4260.6191.7642.4251.453-3.441.111-0.8523.1194.6523.2742.5092.949-2.8392.0092.212.53211
Percentage of AdjustmentForLimitedPartnersOwnershipInOperatingPartnership100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:ERPOP, us-gaap:LimitedPartner


Adjustment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value31-0.619-1.764-2.425-1.4533.44-1.1110.852-3.119-4.652-3.274-2.509-2.9492.839-2.009-2.21-2.532-11.564
Percentage of AdjustmentForLimitedPartnersOwnershipInOperatingPartnership-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

eqr:AdjustmentToAdditionalPaidInCapitalAndNoncontrollingOwnershipInterest us-gaap:StatementEquityComponents

eqr:AdjustmentToAdditionalPaidInCapitalAndNoncontrollingOwnershipInterest

us-gaap:AdditionalPaidInCapital


Adjustment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-31.4260.6191.7642.4251.453-3.441.111-0.8523.1194.6523.2742.5092.949-2.8392.0092.212.53211
Percentage of AdjustmentToAdditionalPaidInCapitalAndNoncontrollingOwnershipInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterest


Adjustment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value31-0.619-1.764-2.425-1.4533.44-1.1110.852-3.119-4.652-3.274-2.509-2.9492.839-2.009-2.21-2.532-11.564
Percentage of AdjustmentToAdditionalPaidInCapitalAndNoncontrollingOwnershipInterest-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

eqr:AdjustmentToAdditionalPaidInCapitalResultingFromConversionOfCapitalUnits us-gaap:StatementEquityComponents

eqr:AdjustmentToAdditionalPaidInCapitalResultingFromConversionOfCapitalUnits

us-gaap:AdditionalPaidInCapital


Adjustment
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value660.7830.0572.0111.8440.5674.9710.0844.7853.7410.0250.1970.1341.1830.0950.37814
Percentage of AdjustmentToAdditionalPaidInCapitalResultingFromConversionOfCapitalUnits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Adjustment
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0110.00.00.0010.00.0010.00.0020.00.00.0010.01
Percentage of AdjustmentToAdditionalPaidInCapitalResultingFromConversionOfCapitalUnits0.00.00.00.00.00.00.00.00.00.00.30.1

eqr:AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties

eqr:AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties


Allocation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.7410.6820.7420.7030.88120.8470.830.8210.7990.7790.750.5090.68-0.0310.8010.7650.788140.8230.7810.7641.1840.9860.8440.6430.7440.7080.5880.5040.563-0.311-0.8150.0250.387-0.3120.3190.45-1.250.387-0.0710.041.349-0.1880.1850.25
Percentage of AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties dei:LegalEntity

eqr:ERPOP


Allocation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.7410.6820.7420.7030.88120.8470.830.8210.7990.7790.750.5090.68-0.0310.8010.7650.788140.8230.7810.7641.1840.9860.8440.6430.7440.708
Percentage of AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:ERPOP, us-gaap:PartiallyOwnedProperties


Allocation
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.7030.88120.830.8210.799
Percentage of AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredFinancingCosts

eqr:AmortizationOfDeferredFinancingCosts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.9392.1852.6862.1012.1112.0413.0062.8813.6472.1362.2563.2763.0672.6072.5382.5892.5342.6283.1342.7926.5614.3354.3537.176113.3474.0632.9745.0774.7214.9743.0742.4252.4652.3193.197
Percentage of AmortizationOfDeferredFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredFinancingCosts dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302015-12-312014-12-31
Value1.9392.1852.6862.1012.1112.0413.0062.8813.6472.1362.2563.2763.0672.534
Percentage of AmortizationOfDeferredFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredFinancingCostsInvestmentInRealEstateNet

eqr:AmortizationOfDeferredFinancingCostsInvestmentInRealEstateNet


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312010-12-312010-09-30
Value40000.060000.060000.060000.060000.060000.060000.000000-151000.00-1000.00000-944000.0-613000.0
Percentage of AmortizationOfDeferredFinancingCostsInvestmentInRealEstateNet100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.00.0100.00.00.00.00.0100.0100.0

eqr:AmortizationOfDeferredFinancingCostsInvestmentInRealEstateNet dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value40000.060000.060000.0300000.0-60000.0-60000.0-60000.0
Percentage of AmortizationOfDeferredFinancingCostsInvestmentInRealEstateNet100.0100.0100.0500.0-100.0-100.0-100.0

eqr:AmortizationOfDeferredFinancingCostsMortgageNotesPayableNet

eqr:AmortizationOfDeferredFinancingCostsMortgageNotesPayableNet


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value436000.0703000.0478000.0461000.0473000.0403000.0405000.01185000.01928000.0416000.0595000.01645000.0468000.02084000.0550000.0565000.0584000.0794000.0658000.0703000.0749000.01868000.0
Percentage of AmortizationOfDeferredFinancingCostsMortgageNotesPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredFinancingCostsMortgageNotesPayableNet dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value436000.0703000.0478000.0461000.0473000.0403000.0405000.01185000.01928000.0416000.0595000.01645000.0468000.02084000.0550000.0565000.0584000.0794000.0658000.0703000.0749000.01868000.0
Percentage of AmortizationOfDeferredFinancingCostsMortgageNotesPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredFinancingCostsNetMortgageNotesPayableNet

eqr:AmortizationOfDeferredFinancingCostsNetMortgageNotesPayableNet


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value436000.0385000.0478000.0461000.0-2219000.0403000.0
Percentage of AmortizationOfDeferredFinancingCostsNetMortgageNotesPayableNet100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredFinancingCostsNetMortgageNotesPayableNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

eqr:SecuredConventional, eqr:FixedRateDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value335000.019000.0368000.0352000.0-2328000.0293000.0
Percentage of AmortizationOfDeferredFinancingCostsNetMortgageNotesPayableNet76.84.977.076.4104.972.7

eqr:SecuredTaxExempt, eqr:FloatingRateDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value41000.0306000.050000.049000.049000.050000.0
Percentage of AmortizationOfDeferredFinancingCostsNetMortgageNotesPayableNet9.479.510.510.6-2.212.4

eqr:AmortizationOfDeferredFinancingCostsNetMortgageNotesPayableNet us-gaap:LongtermDebtType

eqr:FloatingRateDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value101000.0366000.0110000.0109000.0109000.0110000.0
Percentage of AmortizationOfDeferredFinancingCostsNetMortgageNotesPayableNet23.295.123.023.6-4.927.3

eqr:AmortizationOfDeferredFinancingCostsNotesNet

eqr:AmortizationOfDeferredFinancingCostsNotesNet


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value959000.0957000.01685000.01114000.01113000.01114000.01482000.01154000.01116000.01117000.01058000.01028000.01028000.0992000.0927000.0895000.0900000.0899000.0900000.0794000.0832000.02763000.0
Percentage of AmortizationOfDeferredFinancingCostsNotesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredFinancingCostsNotesNet dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value959000.0957000.01685000.01114000.01113000.01114000.01482000.01154000.01116000.01117000.01058000.01028000.01028000.0992000.0927000.0895000.0900000.0899000.0900000.0794000.0832000.02763000.0
Percentage of AmortizationOfDeferredFinancingCostsNotesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredFinancingCostsNotesPayableNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

eqr:AmortizationOfDeferredFinancingCostsNotesPayableNet

eqr:UnsecuredPublic, eqr:FixedRateDebt


Amortization
Period End2021-06-302021-03-312020-12-31
Value959000.0957000.01685000.0
Percentage of AmortizationOfDeferredFinancingCostsNotesPayableNet100.0100.0100.0

eqr:AmortizationOfDeferredFinancingCostsOtherAssets

eqr:AmortizationOfDeferredFinancingCostsOtherAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value584000.0585000.0583000.0586000.0585000.0584000.01179000.0602000.0603000.0603000.0603000.0603000.0603000.0603000.0602000.0604000.0603000.0603000.01075000.0764000.0764000.0763000.0
Percentage of AmortizationOfDeferredFinancingCostsOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredFinancingCostsOtherAssets dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value584000.0585000.0583000.0586000.0585000.0584000.01179000.0602000.0603000.0603000.0603000.0603000.0603000.0603000.0602000.0604000.0603000.0603000.01075000.0764000.0764000.0763000.0
Percentage of AmortizationOfDeferredFinancingCostsOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredSettlementsOnDerivativeInstrumentsOtherLiabilities

eqr:AmortizationOfDeferredSettlementsOnDerivativeInstrumentsOtherLiabilities


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4000.02000.03000.03000.03000.03000.03000.03000.03000.03000.03000.04000.02000.03000.02000.04000.02000.03000.0-153000.03000.03000.069000.0-333000.04000.027000.0133000.0-935000.0134000.0400000.0-133000.0-133000.0-133000.0-135000.0-133000.0-133000.0-133000.0-134000.0-134000.0-134000.0-134000.0-133000.0-134000.0-133000.0-134000.0-134000.0-133000.0
Percentage of AmortizationOfDeferredSettlementsOnDerivativeInstrumentsOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDeferredSettlementsOnDerivativeInstrumentsOtherLiabilities dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value4000.02000.03000.03000.03000.03000.03000.03000.03000.03000.03000.04000.02000.03000.02000.04000.02000.03000.0-153000.03000.03000.069000.0-333000.04000.027000.0133000.0-935000.0
Percentage of AmortizationOfDeferredSettlementsOnDerivativeInstrumentsOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable

eqr:AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.690.6840.4430.60.5960.5950.601-8.409150.7360.75171.0660.8970.9250.052-0.330.5250.160.1580.039-21.515-2.865-2.841-2.853-4.567-5.389-3.504-3.505-3.506-119.393-15.149-16.526-7.557-2.871-2.798-2.511-2.153-2.144-2.3-1.958-1.858-4.16-1.918-1.567-1.563
Percentage of AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.690.6840.4430.60.5960.5950.601-8.409150.7360.75171.0660.8970.9250.052-0.330.5250.160.1580.039-21.515-2.865-2.841-2.853-4.567-5.389
Percentage of AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable us-gaap:DebtInstrument, us-gaap:LongtermDebtType

eqr:SecuredConventional, eqr:FixedRateDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.380.3780.130.2870.2860.285
Percentage of AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable55.155.329.347.848.047.9

eqr:SecuredTaxExempt, eqr:FloatingRateDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.310.3060.3130.3130.310.31
Percentage of AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable44.944.770.752.252.052.1

eqr:AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable us-gaap:LongtermDebtType

eqr:FloatingRateDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.310.3060.3130.3130.310.31
Percentage of AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable44.944.770.752.252.052.1

eqr:AmortizationOfDiscountsAndPremiumsOnDebtNotesNet

eqr:AmortizationOfDiscountsAndPremiumsOnDebtNotesNet


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.6090.610.9540.6810.6810.6811.0420.7510.6870.6820.6710.6660.6650.6350.5930.5750.5910.6050.5940.5240.5141.540.6620.6620.6150.6180.6190.630.5670.5680.5660.5680.5660.4860.4850.5410.540.5860.5221.5932.4362.2312.2352.2492.1252.128
Percentage of AmortizationOfDiscountsAndPremiumsOnDebtNotesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDiscountsAndPremiumsOnDebtNotesNet dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.6090.610.9540.6810.6810.6811.0420.7510.6870.6820.6710.6660.6650.6350.5930.5750.5910.6050.5940.5240.5141.540.6620.6620.6150.6180.619
Percentage of AmortizationOfDiscountsAndPremiumsOnDebtNotesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:AmortizationOfDiscountsAndPremiumsOnDebtNotesNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

eqr:UnsecuredPublic, eqr:FixedRateDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.6090.610.9540.6810.6810.681
Percentage of AmortizationOfDiscountsAndPremiumsOnDebtNotesNet100.0100.0100.0100.0100.0100.0

eqr:AnnualDividendPerPreferredSharePreferenceUnit dei:LegalEntity, us-gaap:StatementEquityComponents

eqr:AnnualDividendPerPreferredSharePreferenceUnit

eqr:ERPOP, us-gaap:PreferredStock


Annual
Period End2021-06-302021-03-312020-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value04.1450004.1454140.9004.1454140.9004.145
Percentage of AnnualDividendPerPreferredSharePreferenceUnit0.0100.00.00.00.0100.0100.00.00.0100.0100.00.00.0100.0

eqr:ChangeInCarryingValueOfRedeemableLimitedPartners dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:ChangeInCarryingValueOfRedeemableLimitedPartners

eqr:ERPOP, us-gaap:LimitedPartner


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1.592.384-0.6441.917-0.657-1.391-1.054-1.002-1.521.5651.694-0.5671.087-0.443
Percentage of ChangeInCarryingValueOfRedeemableLimitedPartners100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:CostOfPropertyManagement

eqr:CostOfPropertyManagement


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value24262220232722212426232223232020
Percentage of CostOfPropertyManagement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:CostOfPropertyManagement dei:LegalEntity

eqr:ERPOP


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value24262220232722212426232223232020
Percentage of CostOfPropertyManagement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:DebtFinancingCostsMortgageNotesPayableNet

eqr:DebtFinancingCostsMortgageNotesPayableNet


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0-318000.0000-117000.0-605000.0-1632000.00-70000.0-834000.0397000.0-35000.00
Percentage of DebtFinancingCostsMortgageNotesPayableNet0.0100.00.00.00.0100.0100.0100.00.0100.0100.0100.0100.00.0

eqr:DebtFinancingCostsMortgageNotesPayableNet dei:LegalEntity

eqr:ERPOP


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0-318000.0004708000.0-117000.0-605000.0-1632000.00-70000.0-834000.0397000.0-35000.00
Percentage of DebtFinancingCostsMortgageNotesPayableNet0.0100.00.00.00.0100.0100.0100.00.0100.0100.0100.0100.00.0

eqr:DebtFinancingCostsOtherAssets

eqr:DebtFinancingCostsOtherAssets


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0-16000.0-34000.0-181000.0-7054000.000145000.0
Percentage of DebtFinancingCostsOtherAssets0.0100.0100.0100.0100.00.00.0100.0

eqr:DebtFinancingCostsOtherAssets dei:LegalEntity

eqr:ERPOP


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0-16000.0-34000.0-181000.0-7054000.000145000.0
Percentage of DebtFinancingCostsOtherAssets0.0100.0100.0100.0100.00.00.0100.0

eqr:DecreaseInRentalRevenues us-gaap:TypeOfArrangement

eqr:DecreaseInRentalRevenues

eqr:NonResidentialLeases


Decrease
Period End2020-12-31
Value1700000.0
Percentage of DecreaseInRentalRevenues100.0

eqr:DilutiveOpUnits

eqr:DilutiveOpUnits


Dilutive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value1213-0.007131313-0.008121212-0.002121212-0.006121212-0.001131313-0.008131313-0.0081313130.0371414-0.0251313
Percentage of DilutiveOpUnits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:DilutiveSecuritiesOptions

eqr:DilutiveSecuritiesOptions


Dilutive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1964000.01586000.0-134000.0781000.01095000.02363000.0-70000.03187000.02880000.02707000.0132000.02972000.02628000.02355000.0-115000.03039000.02959000.02776000.0-376000.03365000.03131000.03954000.093000.03516000.03428000.03631000.0234000.02838000.02567000.02183000.0-121000.03260000.03393000.03219000.0-200000.03960000.04245000.0
Percentage of DilutiveSecuritiesOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:DilutiveSecuritiesOptions dei:LegalEntity

eqr:ERPOP


Dilutive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1964000.01586000.0-134000.0781000.01095000.02363000.0-70000.03187000.02880000.02707000.0132000.02972000.02628000.02355000.0-115000.03039000.02959000.02776000.0-376000.03365000.03131000.03954000.093000.03516000.03428000.03631000.0234000.02838000.0
Percentage of DilutiveSecuritiesOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:DividendsPreferenceUnits dei:LegalEntity

eqr:DividendsPreferenceUnits

eqr:ERPOP


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.7720.7730.7720.7730.7720.7730.7720.7730.7720.7730.7720.7730.7720.7730.7730.7720.7730.7730.7730.7730.7720.7730.80.8330.8330.8911.0361.037
Percentage of DividendsPreferenceUnits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:ExchangeOfOPUnitsBetweenLimitedPartnerAndGeneralPartner dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:ExchangeOfOPUnitsBetweenLimitedPartnerAndGeneralPartner

eqr:ERPOP, us-gaap:GeneralPartner


Exchange
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value660.7830.0572.0121.8440.5674.9720.0844.7873.7420.0250.1970.1341.1830.0950.379140.0463.4090.1270.1440.588
Percentage of ExchangeOfOPUnitsBetweenLimitedPartnerAndGeneralPartner100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:ERPOP, us-gaap:LimitedPartner


Exchange
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-66.66-0.783-0.057-2.012-1.844-0.567-4.972-0.084-4.787-3.742-0.025-0.197-0.134-1.183-0.095-0.379-14.243-0.046-3.409-0.127-0.144-0.588
Percentage of ExchangeOfOPUnitsBetweenLimitedPartnerAndGeneralPartner-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

eqr:GainLossOnSalesOfLandParcels

eqr:GainLossOnSalesOfLandParcels


Gain
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value0.00.005-0.0331.8990.1770.001-0.0080.00.995-0.0030.0-0.02319-0.0284.0370.0110.00.00.0-0.0013.4311.0520.824-0.030.048-2.437140.00.00.00.00.0
Percentage of GainLossOnSalesOfLandParcels0.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.00.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0

eqr:GainLossOnSalesOfLandParcels dei:LegalEntity

eqr:ERPOP


Gain
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.00.005-0.0331.8990.1770.001-0.0080.00.995-0.0030.0-0.02319-0.0284.0370.0110.00.00.0-0.0013.4311.052
Percentage of GainLossOnSalesOfLandParcels0.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.00.0100.00.00.00.0100.0100.0100.0

eqr:GeneralPartnerDistribution dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:GeneralPartnerDistribution

eqr:ERPOP, us-gaap:GeneralPartner


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value225224224224224224210210210210199198198198
Percentage of GeneralPartnerDistribution100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:IncomeLossFromEquityMethodInvestmentsMerger

eqr:IncomeLossFromEquityMethodInvestmentsMerger


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-0.0661.2820.521-0.080.7240.830.6320.835-69.0990.3640.3310.6520.6940.6270.8790.0510.3240.7010.672-8.1210.4130.709-1.0310.458-13.142-3.625-3.0740.336.8820.4721.152.4167.294420.0110.0030.00.0
Percentage of IncomeLossFromEquityMethodInvestmentsMerger100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

eqr:IncomeLossFromEquityMethodInvestmentsMerger dei:LegalEntity

eqr:ERPOP


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-0.0661.2820.521-0.080.7240.830.6320.835-69.0990.3640.3310.6520.6940.6270.8790.0510.3240.7010.672-8.1210.4130.709-1.0310.458-13.142-3.625-3.074
Percentage of IncomeLossFromEquityMethodInvestmentsMerger100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:IncreaseDecreaseInLeaseLiabilities

eqr:IncreaseDecreaseInLeaseLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-2343000.0-868000.0-554000.0-451000.0-578000.0-621000.0-485000.0-613000.0-617000.0-554000.0
Percentage of IncreaseDecreaseInLeaseLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:IncreaseDecreaseInLeaseLiabilities dei:LegalEntity

eqr:ERPOP


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-2343000.0-868000.0-554000.0-451000.0-578000.0-621000.0-485000.0-613000.0-617000.0-554000.0
Percentage of IncreaseDecreaseInLeaseLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:InitialMeasurementAndReclassificationsLeaseLiabilities

eqr:InitialMeasurementAndReclassificationsLeaseLiabilities


Initial
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0-11.308-1.493520.0282
Percentage of InitialMeasurementAndReclassificationsLeaseLiabilities0.0100.0100.0100.00.0100.0

eqr:InitialMeasurementAndReclassificationsLeaseLiabilities dei:LegalEntity

eqr:ERPOP


Initial
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0-11.308-1.493520.0282
Percentage of InitialMeasurementAndReclassificationsLeaseLiabilities0.0100.0100.0100.00.0100.0

eqr:InitialMeasurementAndReclassificationsRightOfUseAssets

eqr:InitialMeasurementAndReclassificationsRightOfUseAssets


Initial
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0-11.308-1.493520.0438
Percentage of InitialMeasurementAndReclassificationsRightOfUseAssets0.0100.0100.0100.00.0100.0

eqr:InitialMeasurementAndReclassificationsRightOfUseAssets dei:LegalEntity

eqr:ERPOP


Initial
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0-11.308-1.493520.0438
Percentage of InitialMeasurementAndReclassificationsRightOfUseAssets0.0100.0100.0100.00.0100.0

eqr:InvestmentsInUnconsolidatedEntities

eqr:InvestmentsInUnconsolidatedEntities


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1453000.01778000.0-889000.0438000.0168000.04558000.0531000.0501000.0911000.05561000.01711000.0801000.0300000.02079000.0710000.0736000.0784000.0804000.0600000.0797000.0
Percentage of InvestmentsInUnconsolidatedEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:InvestmentsInUnconsolidatedEntities dei:LegalEntity

eqr:ERPOP


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1453000.01778000.0-889000.0438000.0168000.04558000.0531000.0501000.0911000.05561000.01711000.0801000.0300000.02079000.0710000.0736000.0784000.0804000.0600000.0797000.0
Percentage of InvestmentsInUnconsolidatedEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:InvestmentsInUnconsolidatedEntitiesOtherLiabilities

eqr:InvestmentsInUnconsolidatedEntitiesOtherLiabilities


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.660.60.00.60.00.90.00.01.380.720.00.960.00.720.02.10.00.90.841.20.00.9
Percentage of InvestmentsInUnconsolidatedEntitiesOtherLiabilities100.0100.00.0100.00.0100.00.00.0100.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.00.0100.0

eqr:InvestmentsInUnconsolidatedEntitiesOtherLiabilities dei:LegalEntity

eqr:ERPOP


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.660.60.00.60.00.90.00.01.380.720.00.960.00.720.02.10.00.90.841.20.00.9
Percentage of InvestmentsInUnconsolidatedEntitiesOtherLiabilities100.0100.00.0100.00.0100.00.00.0100.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.00.0100.0

eqr:IssuanceOfLongTermIncentivePlanUnitsIntoNoncontrollingInterest dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:IssuanceOfLongTermIncentivePlanUnitsIntoNoncontrollingInterest

eqr:ERPOP, us-gaap:LimitedPartner


Issuance
Period End2020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302018-03-31
Value0012000.00001000.0
Percentage of IssuanceOfLongTermIncentivePlanUnitsIntoNoncontrollingInterest0.00.0100.00.00.00.0100.0

eqr:IssuanceOfLongTermIncentivePlanUnitsIntoNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Issuance
Period End2020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302018-03-31
Value0012000.00001000.0
Percentage of IssuanceOfLongTermIncentivePlanUnitsIntoNoncontrollingInterest0.00.0100.00.00.00.0100.0

eqr:LimitedPartnersChangeInCarryingValue

eqr:LimitedPartnersChangeInCarryingValue


Limited
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.59-2.3840.644-1.9170.6571.3911.0541.0021.52-1.565
Percentage of LimitedPartnersChangeInCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:LimitedPartnersChangeInRedemptionValue

eqr:LimitedPartnersChangeInRedemptionValue


Limited
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value297244-41.072-17.304-111.449-32.653571.95355
Percentage of LimitedPartnersChangeInRedemptionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:LimitedPartnersRedemptions dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:LimitedPartnersRedemptions

eqr:ERPOP, us-gaap:GeneralPartner


Limited
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-29.01-72.956-44.601411711132-57.962-1.953-55.0210.439-14.189-13.00312
Percentage of LimitedPartnersRedemptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:MinorityInterestChangeInCarryingValue

eqr:MinorityInterestChangeInCarryingValue


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1.59-2.3840.644-1.9170.6571.3911.0541.0021.52-1.565-1.6940.567-1.0870.443-1.221-0.7780.371-31.593-2.398-2.594.4724.06338143.2730.1913.217211.943-16.7243.5
Percentage of MinorityInterestChangeInCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:MinorityInterestChangeInCarryingValue us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1.592.384-0.6441.917-0.657-1.391-1.054-1.002-1.521.5651.694-0.5671.087-0.4431.2210.778-0.37131
Percentage of MinorityInterestChangeInCarryingValue-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

eqr:MinorityInterestIncreaseFromContributionsByNoncontrollingInterestsPartiallyOwnedProperties dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:MinorityInterestIncreaseFromContributionsByNoncontrollingInterestsPartiallyOwnedProperties

eqr:ERPOP, us-gaap:PartiallyOwnedProperties


Minority
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value076000.00341000.02743000.004594000.0000125000.0
Percentage of MinorityInterestIncreaseFromContributionsByNoncontrollingInterestsPartiallyOwnedProperties0.0100.00.0100.0100.00.0100.00.00.00.0100.0

eqr:MinorityInterestIncreaseFromContributionsByNoncontrollingInterestsPartiallyOwnedProperties us-gaap:StatementEquityComponents

eqr:PartiallyOwned


Minority
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value076000.00341000.02743000.004594000.0000125000.0
Percentage of MinorityInterestIncreaseFromContributionsByNoncontrollingInterestsPartiallyOwnedProperties0.0100.00.0100.0100.00.0100.00.00.00.0100.0

eqr:MortgageNotesPayableLumpSumPayOffs

eqr:MortgageNotesPayableLumpSumPayOffs


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-03-31
Value0.0593236206275001220.07250.012318351188.58573482181560.16212125603.0640.018303.865113584708115047115226431200149
Percentage of MortgageNotesPayableLumpSumPayOffs0.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:MortgageNotesPayableLumpSumPayOffs dei:LegalEntity

eqr:ERPOP


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.0593236206275001220.07250.012318351188.58573482181560.16212125
Percentage of MortgageNotesPayableLumpSumPayOffs0.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:MortgageNotesPayableLumpSumPayOffs us-gaap:DebtInstrument, us-gaap:LongtermDebtType

eqr:SecuredConventional, eqr:FixedRateDebt


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.0283236
Percentage of MortgageNotesPayableLumpSumPayOffs0.047.1100.0100.0

eqr:SecuredTaxExempt, eqr:FloatingRateDebt


Mortgage
Period End2021-06-302021-03-31
Value0.031
Percentage of MortgageNotesPayableLumpSumPayOffs0.052.9

eqr:MortgageNotesPayableLumpSumPayOffs us-gaap:LongtermDebtType

eqr:FloatingRateDebt


Mortgage
Period End2021-06-302021-03-31
Value0.031
Percentage of MortgageNotesPayableLumpSumPayOffs0.052.9

eqr:NetIncomeLossAvailableToOpUnitholdersBasicDilutedNumerator dei:LegalEntity

eqr:NetIncomeLossAvailableToOpUnitholdersBasicDilutedNumerator

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value32658261932693192992763191071202221172191291422021482872152263730211203296185225229
Percentage of NetIncomeLossAvailableToOpUnitholdersBasicDilutedNumerator100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:NonRealEstateCapitalAdditions

eqr:NonRealEstateCapitalAdditions


Non
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.4530.5890.813.754114.5162.8160.6730.4481.0181.35
Percentage of NonRealEstateCapitalAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:NonRealEstateCapitalAdditions dei:LegalEntity

eqr:ERPOP


Non
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.4530.5890.813.754114.5162.8160.6730.4481.0181.35
Percentage of NonRealEstateCapitalAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:OperatingAndFinanceLeaseRightOfUseAssetAmortization

eqr:OperatingAndFinanceLeaseRightOfUseAssetAmortization


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.3282.982.8972.8932.8853.0071.7983.0142.934.022
Percentage of OperatingAndFinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:OperatingAndFinanceLeaseRightOfUseAssetAmortization dei:LegalEntity

eqr:ERPOP


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.3282.982.8972.8932.8853.0071.7983.0142.934.022
Percentage of OperatingAndFinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:OperatingLeaseLeaseIncomeBadDebtNet us-gaap:TypeOfArrangement

eqr:OperatingLeaseLeaseIncomeBadDebtNet

eqr:ResidentialLeases


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value121313169.5643.7843.046
Percentage of OperatingLeaseLeaseIncomeBadDebtNet100.0100.0100.0100.0100.0100.0100.0

eqr:OperatingLeaseLeaseIncomeLoss

eqr:OperatingLeaseLeaseIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value574573600613638662712642629640
Percentage of OperatingLeaseLeaseIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:OperatingLeaseLeaseIncomeLoss us-gaap:ProductOrService

eqr:OtherLeaseRevenue


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value-8.179-9.653-7.011-0.493
Percentage of OperatingLeaseLeaseIncomeLoss-1.4-1.7-1.1-0.1

eqr:PetRent


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.8742.8432.8392.9012.9032.9162.9112.887
Percentage of OperatingLeaseLeaseIncomeLoss0.50.50.40.40.40.50.50.5

eqr:ResidentialAndNonResidentialRent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value554555568582606630629629615
Percentage of OperatingLeaseLeaseIncomeLoss96.496.894.795.095.195.288.597.997.9

eqr:StorageRent


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.8840.9210.9720.9810.9690.960.9240.963
Percentage of OperatingLeaseLeaseIncomeLoss0.10.20.20.10.10.10.10.2

eqr:UtilityRecoveries


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value18181817171717171716
Percentage of OperatingLeaseLeaseIncomeLoss3.33.23.12.82.82.72.52.72.72.6

us-gaap:Parking


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value10109.7799.6939.7539.939.7729.5059.4199.209
Percentage of OperatingLeaseLeaseIncomeLoss1.81.71.61.61.51.51.41.51.51.4

eqr:OperatingLeaseLeaseIncomeLoss us-gaap:ProductOrService, us-gaap:TypeOfArrangement

eqr:OtherLeaseRevenue, eqr:NonResidentialLeases


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.5290.609-0.951-0.28
Percentage of OperatingLeaseLeaseIncomeLoss0.10.1-0.1-0.0

eqr:OtherLeaseRevenue, eqr:ResidentialLeases


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value-8.708-10.262-6.06-0.213
Percentage of OperatingLeaseLeaseIncomeLoss-1.5-1.8-0.9-0.0

eqr:PetRent, eqr:ResidentialLeases


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.8742.8432.8392.9012.9032.9162.9112.887
Percentage of OperatingLeaseLeaseIncomeLoss0.50.50.40.40.40.50.50.5

eqr:ResidentialAndNonResidentialRent, eqr:NonResidentialLeases


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1515156.0421218171817
Percentage of OperatingLeaseLeaseIncomeLoss2.72.82.61.01.92.72.42.92.8

eqr:ResidentialAndNonResidentialRent, eqr:ResidentialLeases


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value538539553576594612612611598
Percentage of OperatingLeaseLeaseIncomeLoss93.794.092.194.093.292.586.095.095.1

eqr:StorageRent, eqr:NonResidentialLeases


Operating
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value0.0240.020.0210.020.019-0.012
Percentage of OperatingLeaseLeaseIncomeLoss0.00.00.00.00.0-0.0

eqr:StorageRent, eqr:ResidentialLeases


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.860.9010.9510.9620.9490.940.9370.919
Percentage of OperatingLeaseLeaseIncomeLoss0.10.10.10.10.10.10.10.1

eqr:UtilityRecoveries, eqr:NonResidentialLeases


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.1520.1780.1680.1340.1470.2280.2670.2380.209
Percentage of OperatingLeaseLeaseIncomeLoss0.00.00.00.00.00.00.00.00.0

eqr:UtilityRecoveries, eqr:ResidentialLeases


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value18171817171717161616
Percentage of OperatingLeaseLeaseIncomeLoss3.23.13.02.82.82.62.42.62.72.6

us-gaap:Parking, eqr:NonResidentialLeases


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.0950.2670.0880.1010.1260.0970.0890.10.087
Percentage of OperatingLeaseLeaseIncomeLoss0.00.00.00.00.00.00.00.00.0

us-gaap:Parking, eqr:ResidentialLeases


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value109.7349.6919.5929.6279.8339.6839.4059.3329.137
Percentage of OperatingLeaseLeaseIncomeLoss1.81.71.61.61.51.51.41.51.51.4

eqr:OperatingLeaseLeaseIncomeLoss us-gaap:TypeOfArrangement

eqr:NonResidentialLeases


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1616156.2971218171817
Percentage of OperatingLeaseLeaseIncomeLoss2.82.92.61.01.92.72.52.92.9

eqr:ResidentialLeases


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value558557585606625643693624611621
Percentage of OperatingLeaseLeaseIncomeLoss97.297.197.499.098.197.297.497.197.297.1

eqr:OtherLiabilitiesLossFromInvestmentsInUnconsolidatedEntitiesMerger

eqr:OtherLiabilitiesLossFromInvestmentsInUnconsolidatedEntitiesMerger


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value327000.0329000.0318000.0326000.0318000.0327000.0329000.0317000.0334000.0343000.0343000.0333000.0337000.0350000.0338000.0347000.0358000.0372000.0373000.0371000.0387000.0395000.0394000.0583000.0676000.0662000.0825000.0846000.0734000.0937000.0-752000.0809000.0880000.04153000.00000
Percentage of OtherLiabilitiesLossFromInvestmentsInUnconsolidatedEntitiesMerger100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

eqr:OtherLiabilitiesLossFromInvestmentsInUnconsolidatedEntitiesMerger dei:LegalEntity

eqr:ERPOP


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value327000.0329000.0318000.0326000.0318000.0327000.0329000.0317000.0334000.0343000.0343000.0333000.0337000.0350000.0338000.0347000.0358000.0372000.0373000.0371000.0387000.0395000.0394000.0583000.0676000.0662000.0825000.0
Percentage of OtherLiabilitiesLossFromInvestmentsInUnconsolidatedEntitiesMerger100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:PaymentsForCapitalExpendituresToRealEstate

eqr:PaymentsForCapitalExpendituresToRealEstate


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3728433022385046473450
Percentage of PaymentsForCapitalExpendituresToRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:PaymentsForCapitalExpendituresToRealEstate dei:LegalEntity

eqr:ERPOP


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3728433022385046473450
Percentage of PaymentsForCapitalExpendituresToRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:PaymentsOfInterestCapitalizedForRealEstateUnderDevelopment

eqr:PaymentsOfInterestCapitalizedForRealEstateUnderDevelopment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4.4073.7693.2852.7782.2681.8342.0832.1221.4771.2021.7131.611.2491.6883.1266.5388.3888.2389.793131414
Percentage of PaymentsOfInterestCapitalizedForRealEstateUnderDevelopment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:PaymentsOfInterestCapitalizedForRealEstateUnderDevelopment dei:LegalEntity

eqr:ERPOP


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4.4073.7693.2852.7782.2681.8342.0832.1221.4771.2021.7131.611.2491.6883.1266.5388.3888.2389.793131414
Percentage of PaymentsOfInterestCapitalizedForRealEstateUnderDevelopment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment

eqr:PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-31
Value3728
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment100.0100.0

eqr:PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment us-gaap:StatementBusinessSegments

eqr:NonSameStoreAndOther


Payments
Period End2021-06-302021-03-31
Value0.4390.061
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment1.20.2

eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value3728
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment98.899.8

eqr:PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

eqr:Boston, eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value5.5983.469
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment14.812.1

eqr:Denver, eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value0.260.355
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment0.71.2

eqr:LosAngeles, eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value3.5664.666
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment9.416.3

eqr:NonSameStore, eqr:NonSameStoreAndOther


Payments
Period End2021-06-302021-03-31
Value0.2260.062
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment0.60.2

eqr:OrangeCounty, eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value1.3161.056
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment3.53.7

eqr:Other, eqr:NonSameStoreAndOther


Payments
Period End2021-06-302021-03-31
Value0.213-0.001
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment0.6-0.0

eqr:SanDiego, eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value0.7480.679
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment2.02.4

eqr:SanFrancisco, eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value6.5073.936
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment17.213.7

eqr:Seattle, eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value4.5842.139
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment12.17.5

eqr:SouthernCalifornia, eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value5.636.401
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment14.922.3

stpr:DC, eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value6.7836.325
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment18.022.1

stpr:NY, eqr:SameStore


Payments
Period End2021-06-302021-03-31
Value7.9635.993
Percentage of PaymentsToProceedsFromAcquireOtherPropertyPlantAndEquipment21.120.9

eqr:PercentageOfRentalIncome us-gaap:TypeOfArrangement

eqr:PercentageOfRentalIncome

eqr:NonResidentialLeases


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value03.001.976-2.9763.0
Percentage of PercentageOfRentalIncome0.0100.00.0100.0100.0100.0

eqr:ResidentialApartmentLeases


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value097.0097.0240.0060.97-0.00100.0010.97
Percentage of PercentageOfRentalIncome0.03233.30.04910.1-0.232.30.00.00.00.0

eqr:PercentagePointsOfLineOfCreditFacilityCommitmentFee us-gaap:CreditFacility

eqr:PercentagePointsOfLineOfCreditFacilityCommitmentFee

eqr:UnsecuredRevolvingCreditFacility


Percentage
Period End2021-06-302021-03-312020-12-31
Value00.1250
Percentage of PercentagePointsOfLineOfCreditFacilityCommitmentFee0.0100.00.0

eqr:PreferredStockPreferenceUnitsDividendRatePercentage us-gaap:StatementEquityComponents

eqr:PreferredStockPreferenceUnitsDividendRatePercentage

us-gaap:PreferredStock


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value08.2908.207100.08290000.08290000.08290000.0829
Percentage of PreferredStockPreferenceUnitsDividendRatePercentage0.0100.00.0100.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0

eqr:ProceedsFromSaleOfProperty

eqr:ProceedsFromSaleOfProperty


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-04-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value3680.03843703743050.04162.72903553219812432451126342487824149145364178118701820297544428012920698210934261
Percentage of ProceedsFromSaleOfProperty100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:ProceedsFromSaleOfProperty us-gaap:PropertyPlantAndEquipmentByType

eqr:ConsolidatedRentalProperties


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value3120.03843703743030.04160.0290355321947243140112631448
Percentage of ProceedsFromSaleOfProperty84.90.0100.0100.099.999.40.0100.00.0100.0100.0100.0100.058.7100.057.4100.099.6100.0

eqr:RemainingAmountOfAlternativeMinimumTaxRefundReceived

eqr:RemainingAmountOfAlternativeMinimumTaxRefundReceived


Remaining
Period End2020-09-30
Value1600000.0
Percentage of RemainingAmountOfAlternativeMinimumTaxRefundReceived100.0

eqr:RepaymentsOfMortgageNotesPayable

eqr:RepaymentsOfMortgageNotesPayable


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-11-082013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1.8421.8711.9381.9481.9321.9411.9251.7731.4911.6191.6911.6651.5531.721.9331.85.0071.9641.91.9042.5322.2082.1142.1332.2822.7462.952.9192.9663.0343.1319633.1913.0923.2443.0663.4473.6053.974.2634.0974.1434.2234.2614.185
Percentage of RepaymentsOfMortgageNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:RepaymentsOfMortgageNotesPayable dei:LegalEntity

eqr:ERPOP


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1.8421.8711.9381.9481.9321.9411.9251.7731.4911.6191.6911.6651.5531.721.9331.85.0071.9641.91.9042.5322.2082.1142.1332.2822.7462.95
Percentage of RepaymentsOfMortgageNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:SupplementalExecutiveRetirementPlanSerp dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:SupplementalExecutiveRetirementPlanSerp

eqr:ERPOP, us-gaap:GeneralPartner


Supplemental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-0.828-1.2290.00.111-0.6550.149-0.1360.0-0.937-0.6020.0790.005-0.6210.0830.00.072-0.7980.1320.0-0.053-0.541.3412.705
Percentage of SupplementalExecutiveRetirementPlanSerp100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0

eqr:SupplementalExecutiveRetirementPlanSerp us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Supplemental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value-0.828-1.2290.00.111-0.6550.149-0.1360.0-0.937-0.6020.0790.005-0.6210.0830.00.072-0.7980.1320.0-0.053-0.541.3412.7050.9020.08-2.3071.711.4523.3640.8480.0170.2321.548-2.2190.6895.0660.819-6.2920.567
Percentage of SupplementalExecutiveRetirementPlanSerp100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

eqr:UnitsLimitedPartnersDistributions dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:UnitsLimitedPartnersDistributions

eqr:ERPOP, us-gaap:LimitedPartner


Units
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7.418.5897.9517.9637.9619.0767.4037.4147.4747.6057.1227.1867.1867.188
Percentage of UnitsLimitedPartnersDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:UnrealizedGainLossOnDerivativeInstrumentsOtherLiabilities

eqr:UnrealizedGainLossOnDerivativeInstrumentsOtherLiabilities


Unrealized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.00.0250.2230.9920.0-0.02417119.042-1.891-1.9525.334-0.251-0.2271.5612.906-0.4231.096-10.255118.6953.0665.0584.67-3.4663.4642.777-2.814-0.5643.69511-3.2191310031-5.4-54.30237583.184
Percentage of UnrealizedGainLossOnDerivativeInstrumentsOtherLiabilities0.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:UnrealizedGainLossOnDerivativeInstrumentsOtherLiabilities dei:LegalEntity

eqr:ERPOP


Unrealized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.00.0250.2230.9920.0-0.02417119.042-1.891-1.9525.334-0.251-0.2271.5612.906-0.4231.096-10.255118.695
Percentage of UnrealizedGainLossOnDerivativeInstrumentsOtherLiabilities0.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:WriteOffOfPursuitCostsAccountsPayableAndAccruedExpenses

eqr:WriteOffOfPursuitCostsAccountsPayableAndAccruedExpenses


Write
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value8000.08000.08000.08000.08000.08000.08000.05000.0019000.0104000.00020000.003000.0
Percentage of WriteOffOfPursuitCostsAccountsPayableAndAccruedExpenses100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.00.0100.0

eqr:WriteOffOfPursuitCostsAccountsPayableAndAccruedExpenses dei:LegalEntity

eqr:ERPOP


Write
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value8000.08000.08000.08000.08000.08000.08000.05000.0019000.0104000.00020000.003000.0
Percentage of WriteOffOfPursuitCostsAccountsPayableAndAccruedExpenses100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.00.0100.0

eqr:WriteOffOfPursuitCostsOtherAssets

eqr:WriteOffOfPursuitCostsOtherAssets


Write
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value203000.0114000.052000.079000.0107000.033000.014000.011000.026000.011000.040000.03000.00-4000.011000.010000.03000.09000.0
Percentage of WriteOffOfPursuitCostsOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

eqr:WriteOffOfPursuitCostsOtherAssets dei:LegalEntity

eqr:ERPOP


Write
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value203000.0114000.052000.079000.0107000.033000.014000.011000.026000.011000.040000.03000.00-4000.011000.010000.03000.09000.0
Percentage of WriteOffOfPursuitCostsOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

eqr:WriteOffOfStraightLineRentReceivables us-gaap:UnusualRiskOrUncertaintyByNature

eqr:WriteOffOfStraightLineRentReceivables

eqr:CovidNineteen


Write
Period End2020-12-31
Value0.3
Percentage of WriteOffOfStraightLineRentReceivables100.0

eqr:WriteOffPursuitCostsInvestmentInRealEstate

eqr:WriteOffPursuitCostsInvestmentInRealEstate


Write
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1105000.01209000.01945000.01499000.01536000.01586000.01409000.01095000.01510000.01437000.01285000.01037000.01111000.0931000.0673000.0787000.0820000.0685000.0710000.0804000.0
Percentage of WriteOffPursuitCostsInvestmentInRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

eqr:WriteOffPursuitCostsInvestmentInRealEstate dei:LegalEntity

eqr:ERPOP


Write
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1105000.01209000.01945000.01499000.01536000.01586000.01409000.01095000.01510000.01437000.01285000.01037000.01111000.0931000.0673000.0787000.0820000.0685000.0710000.0804000.0
Percentage of WriteOffPursuitCostsInvestmentInRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition

eqr:ERPOP, us-gaap:GeneralPartner


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value189000.0444000.0318000.0210000.0263000.0153000.0140000.0137000.098000.0267000.0163000.0204000.0103000.0297000.0161000.0172000.0107000.0307000.0160000.0133000.0184000.0173000.0192000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value189000.0444000.0318000.0210000.0263000.0153000.0140000.0137000.098000.0267000.0163000.0204000.0103000.0297000.0161000.0172000.0107000.0307000.0160000.0133000.0184000.0173000.0192000.0159000.0121000.0412000.0158000.0114000.0110000.0477000.075000.0108000.0138000.0311000.081000.075000.066000.0743000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition

eqr:ERPOP, us-gaap:GeneralPartner


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value2.542.2741.9871.9843.2314.0232.1342.3223.4044.5781.4541.6412.542.6232.2882.1072.6862.6962.6832.7064.4935.1342.375
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2.542.2731.9871.9843.2314.0212.1342.3223.4044.5761.4541.6412.542.6222.2882.1072.6862.6952.6842.7064.4925.1332.3752.3463.6236.721.511.4112.1124.8693.014
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0.00.0010.00.00.00.0020.00.00.00.0020.00.00.00.0010.00.00.00.001-0.0010.00.0010.0010.00.00.00.0020.00.00.0010.0010.0
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition

eqr:ERPOP, us-gaap:GeneralPartner


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value0.9880.9880.530.5260.6230.670.490.5030.8890.7930.5280.671.1987.3380.4510.4051.7954.1840.3480.3511.9230.810.869
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value0.9880.9880.530.5260.6230.670.490.5030.8890.7930.5280.671.1987.3380.4510.4051.7954.1840.3480.3511.9230.810.8690.8591.0310.9971.0230.9962.2083.1221.831.9963.3213.3671.8981.8783.8844.0922.156
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition

eqr:ERPOP, us-gaap:LimitedPartner


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value4.0436.4882.4012.4991.9595.0671.211.3712.9267.9032.9352.9583.3134.8032.3232.3312.9052.9642.1392.1384.5689.3352.534
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value4.0436.4882.4012.4991.9595.0671.211.3712.9267.9032.9352.9583.3134.8032.3232.3312.9052.9642.1392.1384.5689.3352.534
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfAboveAndBelowMarketLeases

us-gaap:AmortizationOfAboveAndBelowMarketLeases


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-136000.0-18000.0-18000.0-18000.0-17000.0-18000.0-18000.0-18000.0-17000.0-18000.0-1098000.0-1098000.0-1098000.0-1098000.0-1099000.0-1012000.0-861000.0-856000.0-860000.0-858000.0
Percentage of AmortizationOfAboveAndBelowMarketLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfAboveAndBelowMarketLeases dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-136000.0-18000.0-18000.0-18000.0-17000.0-18000.0-18000.0-18000.0-17000.0-18000.01098000.01098000.0
Percentage of AmortizationOfAboveAndBelowMarketLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-100.0-100.0

us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfDebtDiscountPremium


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.2991.2941.3971.2811.2771.2761.643-7.658161.4181.421181.7311.532-1.4031.581.7221.6370.950.6820.553-19.563-1.774-2.107-1.86-3.751-4.77-2.874-2.938-2.938-118.827-14.581-15.96-7.071-2.386-2.257-1.971-1.567-1.622-0.7070.4780.373-1.9250.3310.5580.565
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDebtDiscountPremium dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1.2991.2941.3971.2811.2771.2761.643-7.658161.4181.421181.7311.532-1.4031.581.7221.6370.950.6820.553-19.563-1.774-2.107-1.86-3.751-4.77
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDeferredHedgeGains

us-gaap:AmortizationOfDeferredHedgeGains


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.332.301175.8745.7615.6316.5265.7544.5064.394.5474.5914.5144.7884.8374.7644.6664.584.4934.3374.265284.5924.7324.5464.2054.1294.1374.0723.9963.9243.8533.6918.1393.6383.5713.5063.4291.3670.8170.8020.8220.8260.780.6050.593
Percentage of AmortizationOfDeferredHedgeGains100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDeferredHedgeGains dei:LegalEntity

eqr:ERPOP


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2.332.301175.8745.7615.6316.5265.7544.5064.394.5474.5914.5144.7884.8374.7644.6664.584.4934.3374.265284.5924.7324.5464.2054.129
Percentage of AmortizationOfDeferredHedgeGains100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value294-1.892-135.486-10.3191042332-224.872215-22.80727-0.127-5.834-6.0516.586-218.937126-32.865
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect dei:LegalEntity

eqr:ERPOP


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value294-1.892-135.486-10.3191042332-224.872215-22.80727-0.127-5.834-6.0516.586-218.937126-32.865
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:StatementEquityComponents

us-gaap:CommonStockDividendsPerShareDeclared

eqr:Distributions


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.60250.60250.60250.60250.60250.60250.56750.56750.56750.56750.540.540.540.54
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:ConcentrationRiskByBenchmark, us-gaap:TypeOfArrangement

us-gaap:ConcentrationRiskPercentage1

eqr:LeaseRentalIncome, eqr:ResidentialLeases


Concentration
Period End2021-06-302021-03-312020-06-302020-03-31
Value2.12.41.50.6
Percentage of ConcentrationRiskPercentage1100.0100.0100.0100.0

us-gaap:SalesRevenueNet, eqr:NonResidentialLeases


Concentration
Period End2021-03-31
Value3.8
Percentage of ConcentrationRiskPercentage1158.3

us-gaap:CostOfPropertyRepairsAndMaintenance

us-gaap:CostOfPropertyRepairsAndMaintenance


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1071171071131041151081141081151061101031089810499102971049610911412211812411112011512511611911710790110107112101106103128194104100120
Percentage of CostOfPropertyRepairsAndMaintenance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostOfPropertyRepairsAndMaintenance dei:LegalEntity

eqr:ERPOP


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value10711710711310411510811410811510611010310898104991029710496109114122118124112120
Percentage of CostOfPropertyRepairsAndMaintenance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostOfPropertyRepairsAndMaintenance us-gaap:StatementBusinessSegments

eqr:SameStoreNonSameStoreAndOther


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value10711710711310411510811410811510611010310898104991029710496109
Percentage of CostOfPropertyRepairsAndMaintenance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:CreditFacility

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

eqr:UnsecuredRevolvingCreditFacility


Debt
Period End2021-03-312016-11-032016-11-30
Value0.7750.008250.00825
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0100.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value200199201200205212214211200204201194192196200184179178177179176172181196194194193190190185180277327205154167172174164164159167198158162146
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation dei:LegalEntity

eqr:ERPOP


Depreciationdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value200199201200205212214211200204201194192196200184179178177179176172181196194194193190
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-2334000.0-2303000.0-17812000.0-5877000.0-5764000.0-5634000.0-6529000.0-5757000.0-4509000.0-4393000.0-4550000.0-4595000.0-4516000.0-4791000.0-4839000.0-4768000.0-4668000.0-4583000.0-4496000.0-4340000.0-4268000.0-28654000.0-4597000.0-4736000.0-4573000.0-4338000.0-4262000.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap:DerivativeInstrumentRisk

eqr:ForwardStartingSwaps


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-2334000.0-2303000.0-17812000.0-5877000.0-5764000.0-5634000.0-6529000.0-5757000.0-4509000.0-4393000.0-4550000.0-4595000.0-4516000.0-4791000.0-4839000.0-4768000.0-4668000.0-4583000.0-4496000.0-4340000.0-4268000.0-28654000.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid

us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid


Distribution
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value8.0618.4797.9637.9627.9948.4847.4137.4747.4727.2567.1867.1867.1886.6666.6876.6916.6957.218507.2587.256123
Percentage of DistributionMadeToLimitedPartnerCashDistributionsPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid dei:LegalEntity

eqr:ERPOP


Distribution
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value8.0618.4797.9637.9627.9948.4847.4137.4747.4727.2567.1867.1867.1886.6666.6876.6916.6957.218507.2587.256123
Percentage of DistributionMadeToLimitedPartnerCashDistributionsPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DistributionsPerLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasic us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:DistributionsPerLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasic

eqr:Distributions


Distributions
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.60250.60250.60250.60250.60250.60250.56750.56750.56750.56750.540.540.540.54
Percentage of DistributionsPerLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:DividendsCommonStockCash

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value225224224224224224210210210210199198198198
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStock

us-gaap:DividendsPreferredStock


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.7720.7730.7720.7730.7720.7730.7720.7730.7720.7730.7720.7730.7720.7730.7730.7720.7730.7730.7730.7730.7720.7730.80.8330.8330.8911.0361.0371.0361.0361.0361.0371.0361.0361.0362.3863.4673.4663.4663.4663.4673.4663.5133.6173.618
Percentage of DividendsPreferredStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStockCash us-gaap:StatementEquityComponents

us-gaap:DividendsPreferredStockCash

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value772000.0773000.0772000.0773000.0772000.0773000.0772000.0773000.0772000.0773000.0772000.0773000.0772000.0773000.0
Percentage of DividendsPreferredStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentDividendsOrDistributions


Equity
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value000100000.0135000.099000.01694000.0693000.0607000.0697000.0573000.0615000.0601000.0686000.0697000.0648000.0698000.0683000.0827000.0655000.01177000.01371000.01677000.0516000.01013000.02167000.01476000.0914000.0962000.0931000.0331000.0257000.0121000.0214000.0151000.089000.01000.0276000.01000.041000.000061000.0
Percentage of EquityMethodInvestmentDividendsOrDistributions0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions dei:LegalEntity

eqr:ERPOP


Equity
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value000100000.0135000.099000.01694000.0693000.0607000.0697000.0573000.0615000.0601000.0686000.0697000.0648000.0698000.0683000.0827000.0655000.01177000.01371000.01677000.0516000.01013000.0
Percentage of EquityMethodInvestmentDividendsOrDistributions0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfDerivatives

us-gaap:GainLossOnSaleOfDerivatives


Gain
Period End2020-12-312020-09-302020-06-302020-03-31
Value0-25000.00-25000.0
Percentage of GainLossOnSaleOfDerivatives0.0100.00.0100.0

us-gaap:GainLossOnSaleOfDerivatives dei:LegalEntity

eqr:ERPOP


Gain
Period End2020-12-312020-09-302020-06-302020-03-31
Value0-25000.00-25000.0
Percentage of GainLossOnSaleOfDerivatives0.0100.00.0100.0

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value223-0.043179-0.025144207178130138-0.021-0.024114-0.051142151787361739057372339661487984113140.00.00.00.0
Percentage of GainsLossesOnSalesOfInvestmentRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate dei:LegalEntity

eqr:ERPOP


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value223-0.043179-0.025144207178130138-0.021-0.024114-0.051142151787361739057372339661487984113
Percentage of GainsLossesOnSalesOfInvestmentRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossAttributableToNoncontrollingInterest

us-gaap:IncomeLossAttributableToNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value102.1439.3863.3769.71311109.91113.9194.4228.1594.2998.0594.6735.1667.3545.411118.3448.7791438.0487.775117.0518.5558.744.4223.0532.568-0.483-1.963-6.3455.7015.751.4810.5821.424-1.371-0.814-0.543-2.4630.1730.628
Percentage of IncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-302010-06-30
Value-0.261-1.611-0.839-0.246-1.042-1.157-0.961-1.15268-0.707-0.674-0.985-1.031-0.977-1.217-0.398-0.682-1.073-1.0457.75-0.8-1.1040.637-1.041122.9632.249-1.176-7.616-1.409-1.175-1.454-1.175-0.355-0.011-0.0030.00.00.00.00.00.188-0.459
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments dei:LegalEntity

eqr:ERPOP


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-0.261-1.611-0.839-0.246-1.042-1.157-0.961-1.15268-0.707-0.674-0.985-1.031-0.977-1.217-0.398-0.682-1.073-1.0457.75-0.8-1.1040.637-1.041122.9632.249-1.176
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity

us-gaap:IncomeLossIncludingPortionAttributableToNoncontrollingInterest

eqr:ERPOP


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value32658261932693192992763191071202221172191291422021482872152263730211203296185225229
Percentage of IncomeLossIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-52.60259-53.94848-56.61962-52.70635-41.35463-60.61833-23.60148-51.10338-17.96942-47.43233-25.12732-65.05241-23.145-58.53437-16.31255-58.77239-21.54247-69.58131-5.82241-60.27625-9.36644-71.52434-7.78839
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities dei:LegalEntity

eqr:ERPOP


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-52.60259-53.94848-56.61962-52.70635-41.35463-60.61833-23.60148-51.10338-17.96942-47.43233-25.12732-65.05241-23.145-58.534
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInInterestPayableNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value10-10.4070.227-1.921.664-0.927-6.8959.589-9.8711-6.515.791-6.41211-14.77623-25.5613-8.49511-11.229-15.817-0.862-1.0482.461-4.873.0688.0830.249-0.169-7.044-0.779-2.4351.039-2.646-3.8263.206-8.63218-22.68920-26.65927-25.89927-32.954
Percentage of IncreaseDecreaseInInterestPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInInterestPayableNet dei:LegalEntity

eqr:ERPOP


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value10-10.4070.227-1.921.664-0.927-6.8959.589-9.8711-6.515.791-6.41211-14.77623-25.5613-8.49511-11.229-15.817-0.862-1.0482.461-4.873.068
Percentage of IncreaseDecreaseInInterestPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value25-20.74622-31.2254318-27.14922-15.93514-22.64718-15.81315-22.575-16.8212811-26.89925-12.769-17.1751629-0.316-4.237-25.62711-26.35818-11.05712-19.915156.372-8.97835-12.2625.982-7.69510-5.7712.663-9.69417-1.798
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets dei:LegalEntity

eqr:ERPOP


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value25-20.74622-31.2254318-27.14922-15.93514-22.64718-15.81315-22.575-16.8212811-26.89925-12.769-17.17516200.3164.237-17.919
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.069.6-100.0-100.069.9

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1.535-3.852-0.379.6892.741-20.811289.5830.781-25.94215-1.3597.241-4.6924.7824.22612-45.324-1.67317-18.377-23.7037.14916-2.79-8.3078.61178.957-26.194206.0226.988-18.437-65.505-72.598157-16.878111.7876.856-28.836142.01613-20.005
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities dei:LegalEntity

eqr:ERPOP


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-1.535-3.852-0.379.6892.741-20.811289.5830.781-25.94215-1.3597.241-4.6924.7824.22612-45.324-1.67317-18.377-23.7037.14916-2.79-8.3078.61
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInSecurityDeposits

us-gaap:IncreaseDecreaseInSecurityDeposits


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1289000.0459000.0-973000.0-2552000.0-5069000.0-988000.0-336000.01371000.0692000.01077000.081000.0377000.02052000.0-261000.0-221000.01582000.0524000.0500000.0-1436000.0-182000.0650000.0-13990000.0648000.0822000.0818000.0-339000.0-105000.01230000.01773000.01143000.0114000.0-395000.0-812000.0-5268000.0-1770000.0493000.02797000.0182000.03213000.01294000.0-5000.0-28000.0-1737000.0-19000.0-610000.03373000.0
Percentage of IncreaseDecreaseInSecurityDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInSecurityDeposits dei:LegalEntity

eqr:ERPOP


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1289000.0459000.0-973000.0-2552000.0-5069000.0-988000.0-336000.01371000.0692000.01077000.081000.0377000.02052000.0-261000.0-221000.01582000.0524000.0500000.0-1436000.0-182000.0650000.0-13990000.0648000.0822000.0818000.0-339000.0-105000.0
Percentage of IncreaseDecreaseInSecurityDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndOtherIncome

us-gaap:InterestAndOtherIncome


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value240.2161.9290.5351.5111.9360.5960.6311.0090.5810.4577.8641.1165.880.4283.9451.1620.6010.6815.509563.0580.4660.2566.4810.121.2490.5762.0320.6053.3360.8160.2490.25680700.2590.1721.3695.3170.2811.0110.1210.2012.625
Percentage of InterestAndOtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndOtherIncome dei:LegalEntity

eqr:ERPOP


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value240.2161.9290.5351.5111.9360.5960.6311.0090.5810.4577.8641.1165.880.4283.9451.1620.6010.6815.509563.0580.4660.2566.4810.1691.2490.576
Percentage of InterestAndOtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0140.8100.0100.0

us-gaap:LineOfCreditFacilityAverageOutstandingAmount us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityAverageOutstandingAmount

us-gaap:CommercialPaper


Line
Period End2021-06-302021-03-312020-12-31
Value127457-70.6
Percentage of LineOfCreditFacilityAverageOutstandingAmount100.0100.0100.0

us-gaap:LineOfCreditFacilityIncreaseDecreaseOtherNet us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityIncreaseDecreaseOtherNet

eqr:UnsecuredRevolvingCreditFacility


Line
Period End2021-06-302021-03-312020-12-31
Value0.0-100.6990.0
Percentage of LineOfCreditFacilityIncreaseDecreaseOtherNet0.0100.00.0

us-gaap:MinorityInterestChangeInRedemptionValue

us-gaap:MinorityInterestChangeInRedemptionValue


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value297244-41.072-17.304-111.449-32.653571.95355-0.4391413-12.831-12.3650.820-50.766-1.785-14.118-43.712-55.4784434-55.7294120911-36.085-44.53-10.323-36.30517-50.109-29.868-41.257-5.2123738-57.41229
Percentage of MinorityInterestChangeInRedemptionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MinorityInterestChangeInRedemptionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-29.01-72.956-44.601411711132-57.962-1.953-55.0210.439-14.189-13.0031212-0.8-20.415501.785144355-44.116-34.22855-41.763-70.23911-36.085-44.531036-17.075029415.212-37.603-38.73757-12.083-29.294
Percentage of MinorityInterestChangeInRedemptionValue-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-33.5100.0100.0100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

us-gaap:NetIncomeLossAllocatedToGeneralPartners dei:LegalEntity

us-gaap:NetIncomeLossAllocatedToGeneralPartners

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value31556252902603072882663081031162141122111241371951422762072183586202195285178216220
Percentage of NetIncomeLossAllocatedToGeneralPartners100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossAllocatedToGeneralPartners dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:ERPOP, us-gaap:GeneralPartner


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value31556252902603072882663081031162141122111241371951422762072183586202
Percentage of NetIncomeLossAllocatedToGeneralPartners100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossAllocatedToLimitedPartners dei:LegalEntity

us-gaap:NetIncomeLossAllocatedToLimitedPartners

eqr:ERPOP


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value102.1439.3863.3769.71311109.91113.9194.4228.1594.2998.0594.6735.1667.3545.411118.3538.781438.057.778117.0598.5588.738
Percentage of NetIncomeLossAllocatedToLimitedPartners100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossAllocatedToLimitedPartners dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:ERPOP, us-gaap:LimitedPartner


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value102.1439.3863.3769.71311109.91113.9194.4228.1594.2998.0594.6735.1667.3545.411118.3538.781438.05
Percentage of NetIncomeLossAllocatedToLimitedPartners100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncashProjectAbandonmentCosts

us-gaap:NoncashProjectAbandonmentCosts


Noncash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1316000.01331000.02005000.01586000.01651000.01627000.01431000.01111000.01539000.01448000.01325000.01059000.01135000.0931000.0777000.0783000.0831000.0715000.0713000.0816000.01115000.01448000.0886000.0671000.01158000.0493000.01540000.0575000.01040000.0452000.01215000.0604000.0832000.02533000.02915000.02576000.02531000.01034000.01023000.01014000.01355000.01683000.01760000.01450000.01016000.01046000.0
Percentage of NoncashProjectAbandonmentCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncashProjectAbandonmentCosts dei:LegalEntity

eqr:ERPOP


Noncash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1316000.01331000.02005000.01586000.01651000.01627000.01431000.01111000.01539000.01448000.01325000.01059000.01135000.0931000.0777000.0783000.0831000.0715000.0713000.0816000.01115000.01448000.0886000.0671000.01158000.0493000.01540000.0
Percentage of NoncashProjectAbandonmentCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value598597613622653682683685669662652652639632630623612603605605594616701694676664662662649630628626632537511553541525510509496518674451444462
Percentage of OperatingLeasesIncomeStatementLeaseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue dei:LegalEntity

eqr:ERPOP


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value598597613622653682683685669662652652639632630623612603605605594616701694676664662662
Percentage of OperatingLeasesIncomeStatementLeaseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue us-gaap:ProductOrService

eqr:OtherRentalIncome


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2323129.302152022252321
Percentage of OperatingLeasesIncomeStatementLeaseRevenue3.94.02.11.52.33.03.33.73.53.3

eqr:OtherRevenue


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value17182117
Percentage of OperatingLeasesIncomeStatementLeaseRevenue2.93.03.32.6

eqr:ParkingRevenue


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value6.1395.4334.5296.783
Percentage of OperatingLeasesIncomeStatementLeaseRevenue1.00.90.71.0

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue us-gaap:StatementBusinessSegments

eqr:NonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value9.0514.8144819303388353839564739426736404353313570
Percentage of OperatingLeasesIncomeStatementLeaseRevenue1.50.88.03.14.65.012.95.25.86.08.77.26.36.710.75.96.77.28.85.25.911.4

eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312011-09-302011-06-302010-09-302010-06-30
Value589592564603623648595649630622595605599590563587571560552574559545457450433429
Percentage of OperatingLeasesIncomeStatementLeaseRevenue98.599.292.096.995.495.087.194.894.294.091.392.893.793.389.394.193.392.891.294.894.188.689.890.895.996.7

eqr:SameStoreNonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value598597613622653682683685669662652652639632630623612603605605594616
Percentage of OperatingLeasesIncomeStatementLeaseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

eqr:Boston, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5756575859635759585858575756565655
Percentage of OperatingLeasesIncomeStatementLeaseRevenue9.79.59.49.59.29.38.58.78.78.88.98.88.98.99.09.09.1

eqr:Denver, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value9.5759.3446.1426.114.5586.4366.4034.577
Percentage of OperatingLeasesIncomeStatementLeaseRevenue1.61.61.00.90.70.91.00.7

eqr:LosAngeles, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value11311611311511712111712211711510510810211010110499
Percentage of OperatingLeasesIncomeStatementLeaseRevenue19.019.518.518.518.117.917.217.917.517.416.216.616.017.516.116.716.3

eqr:NonSameStore, eqr:NonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4.5894.66281924296032363956423917341813
Percentage of OperatingLeasesIncomeStatementLeaseRevenue0.80.84.73.13.84.38.84.75.56.08.76.56.22.75.52.92.3

eqr:OrangeCounty, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2625252626262626262523232224222221
Percentage of OperatingLeasesIncomeStatementLeaseRevenue4.54.34.24.24.03.93.93.93.93.93.53.63.63.93.63.63.6

eqr:Other, eqr:NonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4.4620.154200.15.6264.275283.2372.0930.290.2734.5630.56511141311
Percentage of OperatingLeasesIncomeStatementLeaseRevenue0.70.03.30.00.90.64.10.50.30.00.00.70.11.82.22.21.9

eqr:SanDiego, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value19183.3072323242324232323232222222221
Percentage of OperatingLeasesIncomeStatementLeaseRevenue3.23.10.53.83.63.53.53.53.53.53.63.63.63.63.63.63.6

eqr:SanFrancisco, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value104105104113116121120127123121111116115117108113111
Percentage of OperatingLeasesIncomeStatementLeaseRevenue17.417.617.118.217.817.917.618.618.418.417.117.918.018.517.218.118.3

eqr:Seattle, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6061596063645260555049504949484947
Percentage of OperatingLeasesIncomeStatementLeaseRevenue10.110.39.79.79.79.57.78.88.37.67.57.87.77.87.77.97.8

eqr:SouthernCalifornia, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value159160142165168172168173166164152154148158146149143
Percentage of OperatingLeasesIncomeStatementLeaseRevenue26.726.923.326.525.725.324.625.324.924.823.323.723.225.023.223.923.5

stpr:DC, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value999995999710382111112110109109108108107108107
Percentage of OperatingLeasesIncomeStatementLeaseRevenue16.616.615.616.014.915.212.016.316.816.716.716.817.017.117.117.417.5

stpr:NY, eqr:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value9899100100111116113117113116115115120113113114120
Percentage of OperatingLeasesIncomeStatementLeaseRevenue16.416.716.316.117.117.116.617.117.017.517.617.718.817.918.018.419.6

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-2.334-2.303-17.812-5.877-5.764-5.634-6.529-5.757-4.509-4.393-4.55-4.595-4.516-4.791-4.839-4.768-4.668-4.583-4.496-4.34-4.268-28.654-4.597-4.736-4.573-4.338-4.262-4.271-4.206-4.129-4.057-3.986-3.826-8.272-3.771-3.704
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax dei:LegalEntity

eqr:ERPOP


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-2.334-2.303-17.812-5.877-5.764-5.634-6.529-5.757-4.509-4.393-4.55-4.595-4.516-4.791-4.839-4.768-4.668-4.583-4.496-4.34-4.268-28.654-4.597-4.736-4.573-4.338-4.262-4.271
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:ERPOP, us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2.3342.303175.8775.7645.6346.5295.7574.5094.3934.554.5954.5164.7914.8394.7684.6684.5834.4964.34
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2.3342.303175.8775.7645.6346.5295.7574.5094.3934.554.5954.5164.7914.8394.7684.6684.5834.4964.344.268284.5974.7364.5734.3384.2624.2714.2064.1294.057
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.0-0.223-0.9670.00.0-19.345-14.42-18.897125.9086.0871.2231.709
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax0.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax us-gaap:DerivativeInstrumentRisk

eqr:ForwardStartingSwaps


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.0-0.223-0.9670.00.0-19.345-14.42-18.897125.9086.0871.2231.709
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax0.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.00.0-0.223-0.9670.00.0-19.345-14.42-18.847125.9086.0871.2231.7093.5070.3250.227-1.561-2.9060.4231.90811-11.788-11.5220.097-9.929-11.95210-3.69.5232.8140.565-3.695-11.863.218-13.231-105.248-31.2016.08257-65.894-72.243-13.503
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax0.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax dei:LegalEntity

eqr:ERPOP


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.00.0-0.223-0.9670.00.0-19.345-14.42-18.847125.9086.0871.2231.7093.5070.3250.227-1.561-2.9060.4231.90811-11.788-11.5220.097
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax0.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

eqr:ERPOP, us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-30
Value0.0-0.223-0.9670.00.0-19.345-14.42-18.847125.9086.0871.2231.7090.3250.227
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax0.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.00.0-0.223-0.9670.00.0-19.345-14.42-18.847125.9086.0871.2231.7090.3250.227-1.561-2.9060.4231.90811-11.788-11.5220.097-9.929-11.95210-3.69.5232.8140.565-3.695-11.863.218-13.231-105.248-31.2016.082
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax0.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNonoperatingExpense

us-gaap:OtherNonoperatingExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.3424.119.1864.0971.6942.5336.9722.8135.1173.2752.3967.6613.7693.4412.0261.0281.0421.09-4.112101.5042.5560.1031.1391.77-0.07-16.2344.9711.5330.6571.5753.9860.9812.5646.6834.0949.5177.0675.2392.5284.6262.1642.4153.4871.6434.383
Percentage of OtherNonoperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNonoperatingExpense dei:LegalEntity

eqr:ERPOP


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value3.3424.119.1864.0971.6942.5336.9722.8135.1173.2752.3967.6613.7693.4412.0261.0281.0421.09-4.112101.5042.5560.1031.1391.77-0.071.8944.976
Percentage of OtherNonoperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-11.7100.1

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-03-312020-06-302020-03-31
Value133000.001805000.0
Percentage of OtherOperatingActivitiesCashFlowStatement100.00.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement dei:LegalEntity

eqr:ERPOP


Other
Period End2021-03-312020-06-302020-03-31
Value133000.001805000.0
Percentage of OtherOperatingActivitiesCashFlowStatement100.00.0100.0

us-gaap:PaymentsForProceedsFromHedgeFinancingActivities

us-gaap:PaymentsForProceedsFromHedgeFinancingActivities


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302010-12-31
Value0.00.0251.190.0250.00.0-16.480.00.0-1.6380.0014.6620.00.00.00.00.0130.0250.00.0250.7330.00.050.00.00.00.0
Percentage of PaymentsForProceedsFromHedgeFinancingActivities0.0100.0100.0100.00.00.0100.00.00.0100.0100.0100.00.00.00.00.00.0100.0100.00.0100.0100.00.0100.00.00.00.00.0

us-gaap:PaymentsForProceedsFromHedgeFinancingActivities dei:LegalEntity

eqr:ERPOP


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.00.0251.190.0250.00.0-16.480.00.0-1.6380.0014.6620.00.00.00.00.0130.0250.0
Percentage of PaymentsForProceedsFromHedgeFinancingActivities0.0100.0100.0100.00.00.0100.00.00.0100.0100.0100.00.00.00.00.00.0100.0100.00.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-03-312020-03-31
Value260.001
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities dei:LegalEntity

eqr:ERPOP


Payments
Period End2021-03-312020-03-31
Value260.001
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsOfDividendsMinorityInterest


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.8172.8830.4071.0430.9549.3150.6741.2341.2023.9680.8711.2623.44.221.4130.9290.815.134-101.4227.2587.256123-16.4097.9067.9137.1497.1627.1777.1889.2175.6815.6885.691104.8624.8294.5677.6574.5384.5984.6416.2254.684.691
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsMinorityInterest dei:LegalEntity

eqr:ERPOP


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.8172.8830.4071.0430.9549.3150.6741.2341.2023.9680.8711.2623.44.221.4130.9290.815.1347.6310.9070.926
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-7.512.512.421.8

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.7720.7730.7720.7730.7720.7730.7721.5451.5450.7730.7720.7730.7730.00.7731.5450.00.7730.7720.7730.80.8330.8330.8911.0361.0371.0361.0361.0362.0731.0360.02.0724.4113.4673.4662.433.4663.4673.4663.6133.6173.6183.62
Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock dei:LegalEntity

eqr:ERPOP


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.7720.7730.7720.7730.7720.7730.7721.5451.5450.7730.7720.7730.7730.00.7731.5450.00.7730.7720.773
Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.0440.3180.00.0162.7260.1817.7875.9564.5771.4924.2280.0010.0094.3450.0176.27120.070.040.3970.070.0036.3520.00.384-0.283100.06-1.7280.2484.13713160.3160.0564.227126.6041.2430.2230.9145.7040.7581.435
Percentage of PaymentsOfFinancingCosts100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfFinancingCosts dei:LegalEntity

eqr:ERPOP


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.0440.3180.00.0162.7260.1817.7875.9564.5771.4924.2280.0010.0094.3450.0176.27120.070.040.3970.070.0036.3520.00.384
Percentage of PaymentsOfFinancingCosts100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:PaymentsToAcquireEquityMethodInvestments

us-gaap:PaymentsToAcquireEquityMethodInvestments


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value2.1132.378-0.8891.0380.1685.4580.5310.5012.2916.2811.7111.7610.32.7990.712.8360.7841.7041.441.9970.9290.90.021182.3762.411.25.0143.36.2547.1085.676530.283-0.1320.0033.0242.3961.1560.4530.0460.366
Percentage of PaymentsToAcquireEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireEquityMethodInvestments dei:LegalEntity

eqr:ERPOP


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2.1132.378-0.8891.0380.1685.4580.5310.5012.2916.2811.7111.7610.32.7990.712.8360.7841.7041.441.9970.9290.90.021182.3762.411.2
Percentage of PaymentsToAcquireEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireInterestInJointVenture us-gaap:PropertyPlantAndEquipmentByType, us-gaap:SubsequentEventType

us-gaap:PaymentsToAcquireInterestInJointVenture

eqr:LandParcels, us-gaap:SubsequentEvent


Payments
Period End2021-07-01
Value3300000.0
Percentage of PaymentsToAcquireInterestInJointVenture100.0

us-gaap:PaymentsToAcquireOtherInvestments

us-gaap:PaymentsToAcquireOtherInvestments


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.2640.00.5080.0010.00.00.0180.251
Percentage of PaymentsToAcquireOtherInvestments100.00.0100.0100.00.00.0100.0100.0

us-gaap:PaymentsToAcquireOtherInvestments dei:LegalEntity

eqr:ERPOP


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.2640.00.5080.0010.00.00.0180.251
Percentage of PaymentsToAcquireOtherInvestments100.00.0100.0100.00.00.0100.0100.0

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment


Payments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312011-03-312010-03-31
Value302238504647345052493659535039475040334752433852564432382.6770.353
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment us-gaap:StatementBusinessSegments

eqr:NonSameStoreAndOther


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.3820.6850.9460.6854.2143.1633.0412.222.5062.1081.8160.5121.8471.0330.8731.714
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment0.02.24.11.88.46.86.46.55.04.03.71.43.11.91.74.4

eqr:SameStore


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value423021374543443147504736575249374347
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment0.097.895.998.291.693.293.693.595.096.096.398.696.998.198.395.691.795.1

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

eqr:Boston, eqr:SameStore


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value5.234.5062.9665.6655.6326.2675.9435.9818.1467.026
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment0.014.612.914.811.213.412.517.616.213.5

eqr:Denver, eqr:SameStore


Payments
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.3050.2670.0610.184
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment0.00.90.30.5

eqr:LosAngeles, eqr:SameStore


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value5.8093.9383.719.368.4377.5268.7147.0616.8688.218
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment0.012.816.224.416.816.118.320.813.615.8

eqr:NonSameStore, eqr:NonSameStoreAndOther


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.8160.6820.5810.5483.0312.7962.7412.222.4941.961
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment0.02.22.51.46.16.05.86.55.03.8

eqr:OrangeCounty, eqr:SameStore


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.2041.5981.4372.0211.8162.6482.9791.8331.8652.31
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment0.05.26.35.33.65.76.35.43.74.4

eqr:Other, eqr:NonSameStoreAndOther


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-30
Value0.5660.0030.3650.1371.1830.3670.0120.147
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment0.00.01.60.42.40.80.00.3

eqr:SanDiego, eqr:SameStore


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.5960.8410.8761.1171.3031.4121.1190.630.861.184
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment0.02.73.82.92.63.02.41.91.72.3

eqr:SanFrancisco, eqr:SameStore


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value7.1944.8492.8194.1218.7315.28.1836.0391013
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment0.015.712.310.717.411.117.217.820.325.6

eqr:Seattle, eqr:SameStore