BXP


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

Table of contents



us-gaap:CommonStockValue
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan
us-gaap:StatementClassOfStock
us-gaap:PreferredStockParOrStatedValuePerShare

us-gaap:CommonStockSharesIssued
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan

us-gaap:CommonStockSharesOutstanding
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
dei:LegalEntity

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
dei:LegalEntity

us-gaap:EarningsPerShareBasic
dei:LegalEntity

us-gaap:EarningsPerShareDiluted
dei:LegalEntity

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax
dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
us-gaap:CostOfGoodsAndServicesSold
dei:LegalEntity, us-gaap:ProductOrService
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementGeographical
us-gaap:StatementBusinessSegments

us-gaap:CostsAndExpenses
dei:LegalEntity

us-gaap:GainLossOnInvestments
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:GainsLossesOnExtinguishmentOfDebt
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConsolidationItems
us-gaap:CreditFacility

us-gaap:GeneralAndAdministrativeExpense
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:GrossProfit
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:ConsolidationItems, us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:StatementBusinessSegments
dei:LegalEntity, us-gaap:StatementBusinessSegments, us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:StatementGeographical
us-gaap:ConsolidationItems, us-gaap:StatementEquityComponents
us-gaap:Ownership
us-gaap:Ownership, us-gaap:StatementGeographical
us-gaap:StatementBusinessSegments, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StatementGeographical
us-gaap:StatementGeographical, us-gaap:StatementEquityComponents

us-gaap:InterestExpense
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:NetIncomeLoss
dei:LegalEntity

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted
dei:LegalEntity
dei:LegalEntity
us-gaap:OperatingExpenses
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossNetOfTax
dei:LegalEntity

us-gaap:PreferredStockDividendsIncomeStatementImpact
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:ProfitLoss
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
dei:LegalEntity, us-gaap:ConsolidationItems, us-gaap:ProductOrService
dei:LegalEntity, us-gaap:ProductOrService
dei:LegalEntity, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:ProductOrService
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementGeographical
us-gaap:StatementBusinessSegments

us-gaap:Revenues
dei:LegalEntity
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:Assets
dei:LegalEntity

us-gaap:Liabilities
dei:LegalEntity

us-gaap:LiabilitiesAndStockholdersEquity
dei:LegalEntity

us-gaap:StockholdersEquity
dei:LegalEntity

us-gaap:CashAndCashEquivalentsAtCarryingValue
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:Ownership, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:SubsequentEventType
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:SubsequentEventType

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
dei:LegalEntity

us-gaap:Land
dei:LegalEntity

us-gaap:FurnitureAndFixturesGross
dei:LegalEntity

us-gaap:LeaseholdImprovementsGross
dei:LegalEntity

us-gaap:ConstructionInProgressGross
dei:LegalEntity
dei:LegalEntity, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OperatingLeaseRightOfUseAsset
dei:LegalEntity
dei:LegalEntity, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
dei:LegalEntity
us-gaap:OtherAssets

us-gaap:LongTermDebt
us-gaap:FairValueByMeasurementBasis

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:OperatingLeaseLiability
dei:LegalEntity
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:StockholdersEquity
dei:LegalEntity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInInvestingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
dei:LegalEntity

us-gaap:DepreciationDepletionAndAmortization
dei:LegalEntity

us-gaap:IncreaseDecreaseInAccountsReceivable
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:NetIncomeLoss
dei:LegalEntity

us-gaap:ProfitLoss
dei:LegalEntity

us-gaap:ShareBasedCompensation
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInInvestingActivities
dei:LegalEntity
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:PaymentsToAcquireRealEstate
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementScenario
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:SubsequentEventType

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity

us-gaap:PaymentsOfDividends
dei:LegalEntity

us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
bxp:AboveAndBelowMarketRentAdjustments

bxp:Accruedrentalincomenetdeconsolidated
dei:LegalEntity

bxp:Allocationofundistributedearningstoparticipatingsecuritiespershares

bxp:Amortizationofrightofuseassetoperatingleases
dei:LegalEntity

bxp:AmountOfEarthquakeInsuranceProvidedByIXPLLCAsDirectInsurerSanFranciscoandLosAngeles

bxp:AnnualAggregateLimitOfEarthQuakeInsuranceSanFranciscoandLosAngeles
dei:LegalEntity
bxp:CompanysShareOfNetIncomeLoss

bxp:ConversionsOfNoncontrollingInterestsToStockholdersEquity
dei:LegalEntity
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
bxp:CoverageForActsOfTerrorismUnderTriaCoveredInExcessOfAmountCoveredByIxp

bxp:DeferredDistributionsFromSaleOfInvestmentInUnconsolidatedJointVenture
dei:LegalEntity

bxp:DeferredProceedsFromSaleOfInvestmentInUnconsolidatedJointVenture
dei:LegalEntity
dei:LegalEntity
bxp:DistributionsMadeToMYLTIPUnitsPerUnit
us-gaap:AwardType
bxp:DistributionsPercentBeforeMeasurementDate

bxp:EarningsPerShareAfterAllccationofUndistributedEarningstoParticiaptingSecuritiesBasicdollarspershare
dei:LegalEntity
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan
bxp:EmployeeAndDirectorPaymentPerShare

bxp:EquityProfitLoss
us-gaap:StatementEquityComponents
us-gaap:AwardType
bxp:Finalawardspercentageoftarget
us-gaap:AwardType, us-gaap:SubsequentEventType
dei:LegalEntity
bxp:IncomeStatementBasisDifferential
us-gaap:ProductOrService
bxp:IncreaseDecreaseInParkingAndOtherRevenuePrimarilyRelatedToCOVID19

bxp:IssuanceOfRestrictedSecuritiesToEmployeesAndDirectors
dei:LegalEntity
bxp:IssuanceOfRestrictedUnitsToEmployeesAndDirectors
us-gaap:StatementEquityComponents
bxp:NetIncomeAllocableToGeneralAndLimitedPartnerUnits

bxp:NetIncomeLossAvailableToCommonStockholdersAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasic
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
bxp:NetOperatingIncome
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

bxp:PerOccurrenceLimitForNbcrCoverage

bxp:PerOccurrenceLimitOfEarthQuakeInsuranceSanFranciscoandLosAngeles

bxp:PercentageOfTotalNetOperatingIncome
us-gaap:StatementGeographical

bxp:PercentageOfTotalRentalExpenses
us-gaap:StatementGeographical

bxp:PercentageOfTotalRevenue
us-gaap:StatementGeographical

bxp:PercentageofCompanysShareofNetOperatingIncome
us-gaap:StatementGeographical

bxp:Programtriggerdeductible
dei:LegalEntity
bxp:RedeemableCommonUnits

bxp:RentalExpensesClassOffice
us-gaap:StatementGeographical

bxp:RentalExpensesOperatingExpensesTotal
us-gaap:StatementGeographical

bxp:RentalExpensesResidential
us-gaap:StatementGeographical

bxp:RentalRevenueClassOffice
us-gaap:StatementGeographical

bxp:RentalRevenueResidential
us-gaap:StatementGeographical

bxp:RentalRevenueTotal
us-gaap:StatementGeographical
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
bxp:SeniorNotesPricing

bxp:TransferOfTenantImprovementsRealEstate
dei:LegalEntity

bxp:TransferOfTenantLeaseCostsRealEstate
dei:LegalEntity
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan
bxp:ValueOfLtipUnitsIssued
us-gaap:AwardType

bxp:WeightedAverageNumberDilutedSharesOutstandingAdjustmentpershare

bxp:WeightedAverageNumberOfSharesOutstandingAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasicinshares
dei:LegalEntity

bxp:Writeoffoffullydepreciatedrealestate
dei:LegalEntity
us-gaap:StatementClassOfStock
dei:EntityListingParValuePerShare

us-gaap:AccretionExpense
dei:LegalEntity

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs
dei:LegalEntity

us-gaap:CapitalExpendituresIncurredButNotYetPaid
dei:LegalEntity

us-gaap:CommonStockDividendsPerShareCashPaid
dei:LegalEntity
dei:LegalEntity, us-gaap:AwardType

us-gaap:CumulativeEffectOnRetainedEarningsNetOfTax1
us-gaap:StatementEquityComponents

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
us-gaap:CreditFacility
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentIncreaseAccruedInterest
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:DepreciationAndAmortization
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:DirectCostsOfLeasedAndRentedPropertyOrEquipment
dei:LegalEntity

us-gaap:EquityMethodInvestmentDividendsOrDistributions
dei:LegalEntity

us-gaap:GainLossOnDispositionOfAssets
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:GainLossOnSaleOfInvestments
dei:LegalEntity

us-gaap:GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes
dei:LegalEntity
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
dei:LegalEntity
us-gaap:GainOnSaleOfInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:GainsLossesOnSalesOfInvestmentRealEstate

us-gaap:IncomeLossFromEquityMethodInvestments
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
dei:LegalEntity

us-gaap:IncreaseDecreaseInFinanceReceivables
dei:LegalEntity

us-gaap:IncreaseDecreaseInInterestPayableNet
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities
dei:LegalEntity

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
dei:LegalEntity

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
dei:LegalEntity

us-gaap:InterestAndOtherIncome
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:InterestCostsCapitalized
dei:LegalEntity

us-gaap:InterestPaid
dei:LegalEntity

us-gaap:LeaseCost
dei:LegalEntity

us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest

us-gaap:LineOfCreditFacilityCommitmentFeePercentage
us-gaap:Range
us-gaap:Range
us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementScenario
us-gaap:NoncashOrPartNoncashAcquisitionDebtAssumed1
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementScenario
us-gaap:NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1

us-gaap:NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable
us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterestInNetIncomeLossLimitedPartnershipsNonredeemable
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents
us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseLeaseIncome
dei:LegalEntity

us-gaap:OperatingLeaseLeaseIncomeLeasePayments

us-gaap:OperatingLeasePayments
dei:LegalEntity
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:OperatingLeaseVariableLeaseIncome

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
dei:LegalEntity

us-gaap:OtherComprehensiveIncomeOtherNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
dei:LegalEntity

us-gaap:OtherCostAndExpenseOperating
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
dei:LegalEntity, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementScenario
us-gaap:OtherSignificantNoncashTransactionValueOfConsiderationGiven1

us-gaap:PaidInKindInterest
dei:LegalEntity

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic
dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:PartnersCapitalAccountContributions
us-gaap:StatementEquityComponents
us-gaap:PartnersCapitalAccountDeferredCompensation
us-gaap:StatementEquityComponents
us-gaap:PartnersCapitalAccountDistributions
us-gaap:StatementEquityComponents
us-gaap:PartnersCapitalAccountExchangesAndConversions
us-gaap:StatementEquityComponents
us-gaap:PartnersCapitalAccountRedemptions

us-gaap:PaymentsForCapitalImprovements
dei:LegalEntity

us-gaap:PaymentsForTenantImprovements
dei:LegalEntity

us-gaap:PaymentsOfDebtExtinguishmentCosts
dei:LegalEntity

us-gaap:PaymentsOfFinancingCosts
dei:LegalEntity

us-gaap:PaymentsToAcquireAndDevelopRealEstate
dei:LegalEntity

us-gaap:PaymentsToAcquireEquityMethodInvestments
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

us-gaap:PaymentsToAcquireMarketableSecurities
dei:LegalEntity

us-gaap:PaymentsToAcquireOtherProductiveAssets
dei:LegalEntity

us-gaap:PaymentsToMinorityShareholders
dei:LegalEntity
us-gaap:StatementClassOfStock
us-gaap:PreferredStockDividendRatePercentage

us-gaap:PreferredStockRedemptionPremium
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:StatementClassOfStock
us-gaap:StatementEquityComponents

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

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

us-gaap:ProceedsFromIssuanceOrSaleOfEquity
dei:LegalEntity

us-gaap:ProceedsFromLinesOfCredit
dei:LegalEntity

us-gaap:ProceedsFromMinorityShareholders
dei:LegalEntity
us-gaap:StatementEquityComponents

us-gaap:ProceedsFromOtherDebt
dei:LegalEntity

us-gaap:ProceedsFromSaleOfEquityMethodInvestments
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment
dei:LegalEntity
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:ProvisionForLoanAndLeaseLosses
dei:LegalEntity
us-gaap:StatementClassOfStock
us-gaap:RedeemablePreferredStockDividends
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:RepaymentsOfLinesOfCredit
dei:LegalEntity

us-gaap:RepaymentsOfSecuredDebt
dei:LegalEntity
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:LongtermDebtType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:RepaymentsOfUnsecuredDebt
dei:LegalEntity
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:CreditFacility
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
us-gaap:AwardType
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
us-gaap:AwardType
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures
us-gaap:AwardType, us-gaap:SubsequentEventType
us-gaap:ConsolidatedEntities
us-gaap:StockIssuedDuringPeriodSharesConversionOfUnits
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
us-gaap:ConsolidatedEntities
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueConversionOfUnits

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
us-gaap:StockRedeemedOrCalledDuringPeriodShares
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:StatementEquityComponents

us-gaap:StraightLineRent
dei:LegalEntity
dei:LegalEntity
us-gaap:StraightLineRentAdjustments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:TransferOfOtherRealEstate
dei:LegalEntity

us-gaap:TransferToInvestments
dei:LegalEntity
dei:LegalEntity, us-gaap:StatementEquityComponents
bxp:A2013Myltip

bxp:AccumulatedAmortizationLeasingAndFinancingCosts
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
bxp:AffordableHousingrequirement
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:RealEstateProperties
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
bxp:Aggregatepurchaseprice
us-gaap:GainContingenciesByNature
bxp:Bankruptcyremainingclaimamountallowedbycourttocreditor
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
bxp:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTenantImprovements
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
bxp:Bxp_LesseeOperatingLeaseLiabilityPaymentsDueNextFiveYears
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan
bxp:CommonStockWeightedAveragePrice
dei:LegalEntity
bxp:CompanyShareOfEquity
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
bxp:ContractualSalesPrice
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:SubsequentEventType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
bxp:DebtInstrumentTotalCommitment

bxp:DeferredCostsGross

bxp:DeferredStockUnitsOutstanding
dei:LegalEntity
bxp:DistributionsDeclaredToMYLTIPUnitsPerUnit
dei:LegalEntity
bxp:DistributionsDeclaredToOpAndLtipUnitsPerUnit
dei:LegalEntity
bxp:DistributionsMadeToOpAndLtipUnitsPerUnit
dei:LegalEntity
bxp:GeneralAndLimitedPartnersCapitalAccount
dei:LegalEntity, us-gaap:CumulativeEffectPeriodOfAdoption

bxp:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesnet
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
bxp:Leasedpercentage
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:SubsequentEventType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

bxp:LesseePurchaseOptionReasonablyCertainOfExercising

bxp:LetterOfCreditAndPerformanceObligation

bxp:LineOfCreditAdditionalBorrowingCapacity
dei:LegalEntity, us-gaap:StatementEquityComponents
bxp:LongTermIncentivePlanUnits
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan, dei:LegalEntity
bxp:MyltipUnitsIssued
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
bxp:NetPresentValueAndOperatingLeaseLiability
dei:LegalEntity
bxp:NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsLongTermIncentiveUnitsAtRedemptionValueSharesOutstanding
dei:LegalEntity
bxp:NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsSharesOutstanding
dei:LegalEntity, us-gaap:StatementEquityComponents
bxp:OpUnits
dei:LegalEntity, us-gaap:StatementEquityComponents
bxp:OutperformanceAwardsLongTermIncentivePlanUnits

bxp:PreferredStockRedemptionLiability
dei:LegalEntity
us-gaap:StatementClassOfStock
bxp:PreferredStockRedemptionPricePerSharePlusAccruedAndUnpaidDividends

bxp:RealEstateAccumulatedDepreciationExcludingFurnitureFixturesAndEquipment

bxp:RealEstateAggregateAccumulatedDepreciationForTaxPurposes
dei:LegalEntity

bxp:RealEstateGrossAtCarryingValueExcludingFurnitureFixturesAndEquipment

bxp:RealEstateInvestmentPropertyAtCostIncludingRightofUseAssets
dei:LegalEntity

bxp:SeparateUnrestrictedCashForDeferredCompensationPlan
us-gaap:RelatedPartyTransactionsByRelatedParty
dei:LegalEntity, us-gaap:StatementClassOfStock
bxp:SeriesBDividendRatePercentage
us-gaap:ConsolidatedEntities, us-gaap:StatementClassOfStock
us-gaap:StatementClassOfStock
dei:LegalEntity, us-gaap:StatementEquityComponents
bxp:TwothousandfifteenMYLTIPS
dei:LegalEntity, us-gaap:StatementEquityComponents
bxp:TwothousandfourteenMYLTIP
dei:LegalEntity, us-gaap:StatementEquityComponents
bxp:TwothousandnineteenMYLTIPS
dei:LegalEntity, us-gaap:StatementEquityComponents
bxp:TwothousandseventeenMYLTIP
dei:LegalEntity, us-gaap:StatementEquityComponents
bxp:TwothousandsixteenMYLTIP
us-gaap:AwardType
bxp:ValueOfMyltipAwards
us-gaap:AwardType, us-gaap:SubsequentEventType
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan
bxp:WeightedAveragePerUnitFairValue

dei:EntityCommonStockSharesOutstanding

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances

srt:RealEstateFederalIncomeTaxBasis
dei:LegalEntity

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccountsReceivableNet
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:AreaOfLand
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:SubsequentEventType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType
us-gaap:FairValueByMeasurementBasis
us-gaap:AssetsFairValueDisclosure
us-gaap:GainContingenciesByNature
us-gaap:BankruptcyClaimsAmountOfClaimsSettled
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentCarryingAmount
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:MeasurementInputType
us-gaap:DebtInstrumentMeasurementInput
us-gaap:LongtermDebtType, us-gaap:MeasurementInputType
us-gaap:Range, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:MeasurementInputType
us-gaap:Range, us-gaap:LongtermDebtType, us-gaap:MeasurementInputType
dei:LegalEntity, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:LongtermDebtType
us-gaap:DebtWeightedAverageInterestRate

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent

us-gaap:DeferredCosts
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities

us-gaap:DeferredCostsCurrentAndNoncurrent

us-gaap:DeferredCostsLeasingGross

us-gaap:DeferredFinanceCostsNet
dei:LegalEntity
dei:LegalEntity, us-gaap:LongtermDebtType

us-gaap:DeferredRentReceivablesNet
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities

us-gaap:DividendsPayableAmountPerShare
us-gaap:AwardType
us-gaap:Dividends

us-gaap:DividendsPayableCurrentAndNoncurrent
dei:LegalEntity
us-gaap:StatementClassOfStock
bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
dei:LegalEntity
us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
dei:LegalEntity
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationAssets
dei:LegalEntity
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital

us-gaap:FinanceLeaseLiability
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset
dei:LegalEntity
dei:LegalEntity, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:GeneralPartnersCapitalAccountUnitsOutstanding
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:GuaranteeObligationsMaximumExposure

us-gaap:InterestPayableCurrentAndNoncurrent
dei:LegalEntity

us-gaap:InvestmentBuildingAndBuildingImprovements
dei:LegalEntity

us-gaap:LandAvailableForDevelopment
dei:LegalEntity
dei:LegalEntity, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:LesseeOperatingLeaseDiscountRate

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears

us-gaap:LimitedPartnersCapitalAccountUnitsOutstanding
dei:LegalEntity

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:CreditFacility

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:MarketableSecurities
dei:LegalEntity

us-gaap:MinorityInterestInLimitedPartnerships

us-gaap:MinorityInterestInOperatingPartnerships
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:MinorityInterestOwnershipPercentageByParent

us-gaap:NotesReceivableGross
dei:LegalEntity
us-gaap:FairValueByMeasurementBasis

us-gaap:NotesReceivableRelatedParties
dei:LegalEntity
us-gaap:FairValueByMeasurementBasis
us-gaap:RealEstateProperties
us-gaap:NumberOfRealEstateProperties
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:NumberOfUnitsInRealEstateProperty
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter

us-gaap:OtherBorrowings
dei:LegalEntity
us-gaap:FairValueByMeasurementBasis

us-gaap:OtherLiabilities
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
dei:LegalEntity
us-gaap:PartnersCapital
dei:LegalEntity
us-gaap:PartnersCapitalAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest

us-gaap:PreferredStockRedemptionAmount
us-gaap:ConsolidatedEntities, us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:StatementEquityComponents

us-gaap:PreferredStockValue

us-gaap:PrepaidExpenseAndOtherAssets
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfLand

us-gaap:RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfLand

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities

us-gaap:RealEstateInvestmentPropertyAtCost
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities

us-gaap:RealEstateInvestmentPropertyNet
dei:LegalEntity

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount
dei:LegalEntity
dei:LegalEntity
us-gaap:RedeemableNoncontrollingInterestEquityPreferredCarryingAmount
dei:LegalEntity, us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue
dei:LegalEntity
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:StatementClassOfStock

us-gaap:SecuredDebt
dei:LegalEntity
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:FairValueByMeasurementBasis
us-gaap:LongtermDebtType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:SeniorNotes
dei:LegalEntity
dei:LegalEntity, us-gaap:LongtermDebtType
us-gaap:FairValueByMeasurementBasis
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue
dei:LegalEntity, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased
us-gaap:Range, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementScenario
us-gaap:SharePrice
us-gaap:StatementEquityComponents

us-gaap:TemporaryEquitySharesSubscribedButUnissued
dei:LegalEntity

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
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
Long Term Debt
Stockholders Equity
Retained Earnings Accumulated Deficit
Per Share
Earnings Per Share Diluted
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Prepaid Deferred Expense And Other Assets
Shares
Treasury Stock Shares
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:CommonStockValue ██████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▆▆▅▄▄▄▃▁1.5611.5611.5571.5561.5561.5531.5481.5461.5461.5451.5451.5441.5441.5441.5431.5431.5431.5381.5381.5381.5371.5361.5361.5361.5351.5341.5311.5311.5311.531.531.5241.5241.5161.5161.5091.5071.4941.4811.4761.4641.4511.402NANANA1.389NANANA
 us-gaap:PreferredStockParOrStatedValuePerShare us-gaap:StatementClassOfStock bxp:SeriesBCumulativeRedeemablePreferredStockUnitNANA1e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-08NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockSharesIssued ██████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▆▆▅▄▄▄▃▁156.214859156.1531155.797725155.7152155.701186155.393455154.869198154.650973154.64203154.594386154.537378154.519139154.490429154.441203154.404186154.401166154.386429153.928131153.869075153.851912153.75383153.683866153.658866153.6535153.552831153.481007153.192845153.178686153.171474153.096211153.062001152.469495152.46364151.718424151.680109150.935137150.794602149.463241148.186511147.706147146.465921145.137329140.278005NANANA138.95891NANANA
us-gaap:CommonStockSharesOutstanding ██████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▆▆▅▄▄▄▃▁156.135959156.0742155.718825155.6363155.622286155.314555154.790298154.572073154.56313154.515486154.458478154.440239154.411529154.362303154.325286154.322266154.307529153.849231153.790175153.773012153.67493153.604966153.579966153.5746153.473931153.402107153.113945153.099786153.092574153.017311152.983101152.390595152.38474151.639524151.601209150.856237150.715702149.384341148.107611147.627247146.387021145.058429140.199105NANANA138.88001NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁156.519156.099NA155.67155.407155.258NA154.82154.874154.844NA154.678154.571154.705NA154.483154.331154.214NA154.136153.86153.917NA153.786153.815153.873NA153.273153.238153.169NA152.692152.49151.952NA151.983150.694148.746NA147.622146.695142.504NA140.193139.826139.597NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁156.107155.928NA155.645155.386155.011NA154.577154.555154.525NA154.44154.415154.385NA154.355154.177153.86NA153.754153.662153.626NA153.595153.45153.23NA153.12153.078153.03NA152.407151.938151.646NA150.801150.312148.343NA147.006145.864142.095NA139.595139.113138.931NANANANA
us-gaap:EarningsPerShareBasic ▃▂▁▂▅█▃▃▃▃▃▃▃▄▃▃▃▃▃▂▃▄▃▄▂▄▄▃▂▂▂▃▇▂▂▂▃▂▃▂▂▂▁▂▂▂▂▂▂▂0.720.590.049999999999999820.581.723.210.910.71.060.630.960.770.831.140.670.760.870.630.960.50.631.180.91.20.521.121.140.830.50.350.581.02.950.320.430.380.790.440.690.480.410.29-0.090.410.440.380.380.470.540.37
 us-gaap:EarningsPerShareBasic dei:LegalEntity bxp:BostonPropertiesLimitedPartnership▂▂▁▂▅█▃▂▃0.730.610.059999999999999610.591.753.280.91999999999999990.711.08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareDiluted ▃▂▁▂▅█▃▃▃▃▃▃▃▄▃▃▃▃▃▂▃▄▃▄▂▄▄▃▂▂▂▃▇▂▂▂▃▂▃▂▂▂▁▂▂▂▂▂▂▂0.710.590.049999999999999820.581.713.20.910.71.060.630.960.770.831.140.670.760.870.630.960.50.631.180.91.20.521.111.140.830.50.350.581.02.940.310.430.380.780.430.690.480.410.29-0.090.410.440.380.380.470.530.37
 us-gaap:EarningsPerShareDiluted dei:LegalEntity bxp:BostonPropertiesLimitedPartnership▂▂▁▂▅█▃▂▃0.730.610.059999999999999610.591.753.270.91999999999999990.711.08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 COGS Ratio dei:LegalEntity,us-gaap:ProductOrService bxp:BostonPropertiesLimitedPartnership,srt:Hotel▂▁▁▁▁▄▇▇█1.5610.6320.4640.090.0996.82511.79313.01414.844NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio dei:LegalEntity,us-gaap:ProductOrService bxp:BostonPropertiesLimitedPartnership,us-gaap:ManagementServiceNA6.803NA7.2818.1257.879NA10.3039.986NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio dei:LegalEntity,us-gaap:ProductOrService bxp:BostonPropertiesLimitedPartnership,us-gaap:RealEstateOther2.655NANANA2.484NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService srt:Hotel▂▁▁▁▁▄▇▇█▅▇▇█▅1.5610.6320.4640.090.0996.82511.79313.01414.8448.93811.74513.66414.6079.102NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService us-gaap:RealEstateOther▄█▅▅▃▇▁▂▂2.6553.5053.0092.8962.4843.2372.1592.4292.403NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService,us-gaap:StatementGeographical srt:Hotel,bxp:Boston▂▁▁▁▁▄▇▇█▅▇▇█1.5610.6320.4640.090.0996.82511.79313.01414.8448.93811.74513.66414.607NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Cost Ratio dei:LegalEntity bxp:BostonPropertiesLimitedPartnership▅▅▂▄▁██▇▆713.807713.695665.089693.268654.773752.556757.501743.553733.741NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Cost Ratio dei:LegalEntity bxp:UnconsolidatedJointVentures▄▄▂▄▄▄▄▃▄▄▄▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▅▇▇▇█▇██▇▇████91.22687.26649.0787.72489.56393.20383.71875.9480.20482.95582.19276.17757.09656.48656.37855.51655.86254.76152.14349.00238.36837.66938.76138.19739.15239.53239.73241.95838.43738.03438.08437.98399.831135.65133.072135.998156.035139.1148.561150.101144.987145.645150.698155.126151.129150.962NANANANA
 Gross Margin dei:LegalEntity bxp:UnconsolidatedJointVenturesNA87.26649.0787.72489.56393.20383.71875.9480.20482.95582.19276.17757.096NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Net profit Margin dei:LegalEntity bxp:BostonPropertiesLimitedPartnership▅▅▂▄▁██▇▆713.807713.695665.089693.268654.773752.556757.501743.553733.741NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Net profit Margin dei:LegalEntity bxp:UnconsolidatedJointVentures▄▄▂▄▄▄▄▃▄▄▄▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▅▇▇▇█▇██▇▇████91.22687.26649.0787.72489.56393.20383.71875.9480.20482.95582.19276.17757.09656.48656.37855.51655.86254.76152.14349.00238.36837.66938.76138.19739.15239.53239.73241.95838.43738.03438.08437.98399.831135.65133.072135.998156.035139.1148.561150.101144.987145.645150.698155.126151.129150.962NANANANA
 Operating Margin us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty bxp:A153211SecondAvenue0.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▄▆▂▂▃▅▂▂▃▄▂▂▂▄▂▂▂▃▂▂▂▃▁▁▁▃▁▁▂▃▁▂▂█▁▂▂▃▁▁▁▃▁▂▂▄14.019.87.78.010.117.27.47.510.114.87.97.97.914.27.67.57.910.37.07.17.19.45.95.95.110.15.05.06.29.95.86.26.425.54.56.46.410.95.65.65.611.65.96.16.113.8NANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▃▃▁▂▅█▃▃▃▃▃▃▃▄▃▃▃▃▄▂▂▃▃▃▂▄▄▃▂▂▂▃▇▂▂▂▃▂▃▂▂▂▁▂▂▂113.676105.34713.04394.778269.929492.756147.12109.74164.33799.737148.533124.301132.673180.013107.845121.327134.156100.976171.56785.14776.144141.773147.061164.25695.833171.168177.847130.93479.70557.1992.105155.891455.59948.56448.73958.368119.13965.212101.89971.11960.78741.382-11.61958.29362.40253.346NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▃▃▂▃▃▅▃▃▃▃▃▃▃▃▃▃▃▂▂▁▂▃▃█▂▃▃▂▂▂▂▂▄▂▂▂▂▂▂▂▂▂▁▂▂▂29.54727.55114.59425.58129.4377.02532.5530.97436.51830.42934.10428.70229.25937.66625.72527.74230.67615.85615.019-7.83818.17131.85726.188136.54218.66135.39934.1420.60416.75611.13314.77315.11251.7269.9319.1038.33415.6159.37814.1239.9099.5247.3810.44510.42111.0759.793NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▃▃▁▃▅█▃▃▄▃▃▃▃▄▃▃▃▃▄▂▂▃▃▅▃▄▄▃▂▂▂▃▇▂▂▂▃▂▃▂▂▂▁▂▂▂143.58133.56328.086120.764299.598569.092180.231140.783200.701130.197182.486153.436162.231217.978133.868149.369162.094117.05204.34178.40685.634158.203175.114293.742117.006206.264212.052151.60396.52568.385106.941171.065507.38858.55957.90766.773134.82274.659116.09281.170.38648.843-11.50568.80573.62363.233NANANANA
 us-gaap:CostOfGoodsAndServicesSold dei:LegalEntity,us-gaap:ProductOrService bxp:BostonPropertiesLimitedPartnership,srt:Hotel▂▂▁▃▂▆▇██1.9962.0511.1783.1641.9736.8218.3188.7439.08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold dei:LegalEntity,us-gaap:ProductOrService bxp:BostonPropertiesLimitedPartnership,us-gaap:ManagementServiceNA3.505NA2.8962.4843.237NA2.4292.403NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold dei:LegalEntity,us-gaap:ProductOrService bxp:BostonPropertiesLimitedPartnership,us-gaap:RealEstateOther2.655NANANA2.484NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold dei:LegalEntity,us-gaap:StatementBusinessSegments bxp:BostonPropertiesLimitedPartnership,us-gaap:IntersegmentEliminationNANA-3.009-2.896-2.484NA-2.159-2.429-2.403NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService srt:Hotel▂▂▁▃▂▆▇██▇▇██▇1.9962.0511.1783.1641.9736.8218.3188.7439.087.8638.2218.8288.7418.073NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:RealEstateOther▄█▅▅▃▇▁▂▂2.6553.5053.0092.8962.4843.2372.1592.4292.403NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService,us-gaap:StatementGeographical srt:Hotel,bxp:Boston▂▂▁▃▂▆▇██▇▇██1.9962.0511.1783.1641.9736.8218.3188.7439.087.8638.2218.8288.741NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:StatementBusinessSegments us-gaap:IntersegmentEliminationNANA-3.009-2.896-2.484-3.237-2.159-2.429-2.403-3.395-2.219-2.516-1.97-2.885NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses ██▇▇▇█████▇▇▇▇▆▆▆▆▇█▆▆▆▆▆▆▆▆▅▆▅▅▄▄▃▃▃▃▃▃▂▂▁▁▁▁476.348484.8459.724458.946460.507481.187482.659474.322482.353475.591456.8447.92433.86452.999425.763423.983418.217426.003436.359467.623405.422415.632413.76402.134413.295412.267404.858404.0388.521397.797375.602386.73344.505352.579316.11308.082298.03303.001290.812287.903282.318279.853243.591235.328228.421232.95NANANANA
us-gaap:GainLossOnInvestments ▆▆█▆█▁▆▅▆▇▂▆▅▅▅▅▅▆▅▅▅▅▅▄▅▅▅▅▅▅▆▅▅▅▅▅▅▅▅▄▅▅▅▅▄▅2.2751.6594.2961.8584.552-5.4452.1770.1061.1652.969-3.3191.0750.505-0.1260.9620.9440.731.0420.560.9760.4780.2590.493-1.515-0.0240.3930.387-0.2970.6620.2861.0390.9560.1810.7350.1870.587-0.1860.8010.038-0.860.0060.3730.6820.731-0.6780.2NANANANA
us-gaap:GainsLossesOnExtinguishmentOfDebt █▁0.0-0.898NANANANA-1.53-28.01NANA-16.490.00.0NA-13.8580.014.354NA0.0-0.3710.0NA-22.040.0NANA-10.6330.00.0NA0.0-0.030.1520.00.0-5.4940.2740.767NANANANA-81.6620.0-6.051-2.17NANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity bxp:BostonPropertiesLimitedPartnership█▁0.0-0.898NANANANA-57.5528.01NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity,us-gaap:ConsolidationItems bxp:BostonPropertiesLimitedPartnership,us-gaap:MaterialReconcilingItems█▁0.0-0.898NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity,us-gaap:DebtInstrument,us-gaap:LongtermDebtType bxp:BostonPropertiesLimitedPartnership,bxp:FourPointTwoEightNinePercentUnsecuredSeniorNotes,us-gaap:SeniorNotesNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:ConsolidationItems us-gaap:MaterialReconcilingItems█▁0.0-0.898NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:CreditFacility bxp:DelayedDrawFacilityNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▆█▅▄▆▆▅▅▆▇▄▄▄▆▄▃▄▅▃▃▃▄▃▂▃▄▃▃▃▄▂▃▃█▁▂▂▄▂▁▂▃▁▂▁▄38.40544.95931.05327.86237.74336.45432.79731.14735.07141.76227.68329.67728.46835.89429.39625.79227.14131.38625.29325.16525.41829.35324.320.94422.28428.79123.17222.58923.27129.90520.65624.84122.19443.57115.9419.75719.06627.61919.3917.3420.06924.64317.12118.06717.64826.822NANANANA
us-gaap:GrossProfit ▆▅▁▃▁██▇▆▆▄▂▂453.169443.947398.352421.666402.404471.653467.632456.475454.301447.715429.479411.698406.678NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestExpense ▅▅▆▆▅▃▄▅▄▃▃▂▁▁▁▁▂▂▃▄▄▄▄▅▅▅▇▆▆▆██▄▃▄▄▃▄▄▂▂▃▁▃▂▁106.319107.902111.991110.993107.142101.591102.88106.471102.357101.009100.37895.36692.20490.2291.77292.03295.14395.53497.896104.641105.003105.309106.178108.727108.534108.757117.904113.308110.977113.554121.134122.173103.14100.433105.396105.0399.901103.237103.96795.77795.23699.15192.19297.10396.75592.029NANANANA
us-gaap:NetIncomeLoss ▃▃▁▂▅█▃▃▃▃▃▃▃▄▃▃▃▃▃▂▃▄▃▄▂▄▄▃▂▂▂▃▇▂▂▂▃▂▃▂▂▂▁▂▂▂▂▂▂▂111.703100.59610.31192.479269.15500.121140.824110.396166.943100.73148.529121.743131.306178.646103.829119.962136.33499.708147.21479.34299.186184.365137.851186.72982.078173.771174.51130.37179.14556.62388.719155.324455.03548.065.457.769118.55964.632101.64470.54260.21440.813-12.90357.66861.41252.71453.31765.79567.15244.598
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▂▂▁▂▅█▃▂▃▂▃▃▃▃▂▃▃▂▃▂▂▃▃▄▂▃▃▃▂▂▂▃▇▂▂▂▃▂111.70391.6247.68689.854266.525497.496140.834107.771164.31898.105148.512119.118128.681176.021103.853117.337133.70997.083147.17176.75396.597181.747137.904184.08279.46171.182174.51127.72476.52754.03488.719152.677452.41747.85465.40657.249118.55948.454NANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ▃▂▁▂▅█▃▃▃▃▃▃▃▄▃▃▃▃▃▂▃▄▃▄▂▄▄▃▂▂▂▃▇▂▂▂▃▂▃▂▂▂▁▂▂▂111.70391.6248.08889.854266.189496.485140.834107.771164.2798.105148.498119.118128.665175.894103.868117.33133.66697.083147.07776.75396.597181.5138.265183.86179.46170.994174.639127.66176.52754.03492.495152.091448.78847.85448.17757.769118.55964.632101.3270.54260.21440.813-12.71457.66861.41252.714NANANANA
 us-gaap:OperatingExpenses dei:LegalEntity bxp:UnconsolidatedJointVentures▆▆▆▆▅▆▅▄▄▅▅▄▃▃▃▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁▅▇▇▇▇▆▇█▇▇██▇▇36.78737.13437.6737.57233.70435.40133.5228.83930.13430.49931.37129.52222.86822.84923.23223.12822.10322.07921.96221.75316.35916.66717.09815.89615.82416.27516.53315.51615.46115.46415.49314.96332.49742.36642.21442.29839.26138.89240.70644.58442.27242.84245.22645.54642.83341.704NANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▅▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅█▆▃▁▆▃▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅2.335.4163.1812.7041.018-8.0544.222-0.587-2.76-0.962-2.7552.9911.6661.6661.6651.665-4.9161.48639.4476.902-31.723-58.0198.376-29.52916.267-2.9060.6270.6280.6240.6290.6290.6290.6270.6280.6270.670.6480.6490.6490.649-0.075NANANANANANANANANA
us-gaap:PreferredStockDividendsIncomeStatementImpact ▁████████████████████████████████▁▁▁▁▁0.02.562.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.7042.5892.5892.6182.6462.6472.6182.5892.6462.6472.6182.5892.6462.6472.6180.1460.00.00.00.0NANANANANANANANANANANANA
 us-gaap:PreferredStockDividendsIncomeStatementImpact dei:LegalEntity bxp:BostonPropertiesLimitedPartnership▁████████0.02.562.6252.6252.6252.6252.6252.6252.625NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PreferredStockDividendsIncomeStatementImpact dei:LegalEntity,us-gaap:ConsolidationItems bxp:BostonPropertiesLimitedPartnership,us-gaap:MaterialReconcilingItems█▁0.0-2.56NANA-2.625-2.625NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PreferredStockDividendsIncomeStatementImpact us-gaap:ConsolidationItems us-gaap:MaterialReconcilingItems█▁0.0-2.56NANA-2.625-2.625NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PreferredStockDividendsIncomeStatementImpact us-gaap:StatementBusinessSegments us-gaap:IntersegmentEliminationNANA-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.704-2.589-2.5892.6182.6462.6472.6182.5892.6462.6472.6182.589NANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▃▃▁▃▅█▃▃▄▃▃▃▃▄▃▃▃▃▃▂▃▄▃▅▂▄▄▃▂▂▂▃▇▂▂▂▃▂▃▂▂▂▁▂▂▂141.25128.14724.905118.06298.58577.146176.009141.37203.461131.159185.241150.445160.565216.312132.203147.704167.01115.564164.89471.504117.357216.222166.738323.271100.739209.17211.425150.97595.90167.756106.312170.436506.76157.93157.2866.103134.17474.01115.44380.45169.73848.194-12.75668.08972.48762.507NANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity,us-gaap:ProductOrService bxp:BostonPropertiesLimitedPartnership,bxp:ParkingandOther▃▃▂▂▁▇█▇█18.28216.93815.90316.32713.94624.50426.72725.58226.319NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity,us-gaap:ProductOrService bxp:BostonPropertiesLimitedPartnership,srt:Hotel▂▁▁▁▁▄▇▇█1.5610.6320.4640.090.0996.82511.79313.01414.844NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity,us-gaap:ProductOrService bxp:BostonPropertiesLimitedPartnership,us-gaap:ManagementService▃▂▁▃▄▄██▇7.2846.8036.3567.2818.1257.87910.47310.3039.986NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity,us-gaap:ProductOrService bxp:BostonPropertiesLimitedPartnership,us-gaap:RealEstateOther▄█▅▅▃▇▁▂▂2.6553.5053.0092.8962.4843.2372.1592.4292.403NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments bxp:BostonPropertiesLimitedPartnership,us-gaap:ManagementService,us-gaap:IntersegmentEliminationNANA-6.356-7.281-8.125NA-10.473-10.303-9.986NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity,us-gaap:StatementBusinessSegments bxp:BostonPropertiesLimitedPartnership,us-gaap:IntersegmentEliminationNANA-3.009-2.896-2.484NA-2.159-2.429-2.403NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService bxp:ParkingandOther▃▃▂▂▁▆▇▇▇▇█▇█▇18.28216.93815.90316.32713.94624.50426.72725.58226.31924.90627.83126.55226.90426.134NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService srt:Hotel▂▁▁▁▁▄▇▇█▅▇▇█▅1.5610.6320.4640.090.0996.82511.79313.01414.8448.93811.74513.66414.6079.102NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:ManagementService▃▃▃▃▄▄▅▅▅▁▆█▅▁7.2846.8036.3567.2818.1257.87910.47310.3039.9863.39512.19515.2539.3052.885NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:RealEstateOther▄█▆▅▃▇▂▃▃▇▂▃▁2.6553.5053.0092.8962.4843.2372.1592.4292.4033.3952.2192.5161.97NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:ManagementService,us-gaap:IntersegmentEliminationNANA-6.356-7.281-8.125-7.879-10.473-10.303-9.986-9.277-12.195-15.253-9.305NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementGeographical srt:Hotel,bxp:Boston▂▁▁▁▁▄▇▇█▅▇▇█1.5610.6320.4640.090.0996.82511.79313.01414.8448.93811.74513.66414.607NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments us-gaap:IntersegmentEliminationNANA-3.009-2.896-2.484-3.237-2.159-2.429-2.403-3.395-2.219-2.516-1.97-2.885NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues ▇▇▆▇▆████▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▄▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁713.807713.695665.089693.268654.773752.556757.501743.553733.741725.767705.157686.284664.484661.151655.229657.712656.907632.228636.061625.228623.546665.985624.24629.884618.221618.476613.707618.803589.794574.694576.199574.082515.32483.014478.047470.904471.349447.662452.787452.413436.451417.875392.482386.41393.841378.071376.128375.79389.048377.224
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Assets ▇▇███▇▇▇▇▆▆▆▆▆▅▅▅▅▅▅▅▅▅▅▅▅▆▅▅▅▆▅▅▃▃▂▂▂▂▁▁▁▁22059.07622213.55222858.1922959.21523000.77721829.69821284.90521288.57521268.27520501.60420256.47720137.49819961.16319583.93919372.23319308.51819281.76218966.62718851.64318789.89918963.96519175.8318379.45618980.26319113.95919179.07119886.76718875.1618898.53318979.56820162.25119519.70819462.78415623.27915462.32115141.94315280.62914212.85714782.96613980.79813884.21213835.47313348.263NANANA12348.703NANANA
us-gaap:Liabilities ▇████▇▇▇▇▆▅▅▅▄▄▄▄▄▄▄▄▄▃▄▄▄▅▅▅▅▆▆▆▂▂▂▂▁▂▁▁▁▁13960.10314084.52614511.68114458.57314447.62813402.96113262.30413285.72713247.60812331.31712042.50911931.52411747.92111399.84911269.77711208.82311208.4111044.18910919.71910930.64611065.74611246.0410492.52910917.50411019.27911073.9711878.50611721.4411762.84911825.38512967.71212611.39112569.3749608.9379619.0339345.4169523.3578641.5059313.7988540.9858492.0178490.3628328.418NANANA7223.992NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▇▇███▇▇▇▇▆▆▆▆▆▅▅▅▅▅▅▅▅▅▅▅▅▆▅▅▅▆▅▅▃▃▂▂▂▂▁▁▁▁22059.07622213.55222858.1922959.21523000.77721829.69821284.90521288.57521268.27520501.60420256.47720137.49819961.16319583.93919372.23319308.51819281.76218966.62718851.64318789.89918963.96519175.8318379.45618980.26319113.95919179.07119886.76718875.1618898.53318979.56820162.25119519.70819462.78415623.27915462.32115141.94315280.62914212.85714782.96613980.79813884.21213835.47313348.263NANANA12348.703NANANA
us-gaap:StockholdersEquity ▆▆▇██▇▆▆▆▇▇▇▇▇▇▇▇▆▆▆▆▆▆▇▆▆▆▆▆▆▆▆▆▄▄▄▄▃▃▃▂▂▁5749.3425775.6415996.0836129.5686182.0676047.8665684.6875671.9545715.8535836.6185883.1715876.5665892.845879.0285813.9575825.2185814.3745775.5335786.2955725.9315732.8975749.7835709.4355851.9155782.9785782.1725697.2985725.0265691.0295702.075741.1535683.065624.8485256.8745097.0655119.3565134.0544963.1524865.9984825.5364757.9144696.0424372.643NANANA4446.002NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ▂▂▆▆▆▂▂▃▄▁▂▁▂▁▁▂▂▁▁▁▄▅▂▅▅▄▆▃▄▄█▆▅▃▄▄▆▂▆▄▃▃▂▄▆▄▅557.307697.3691668.7421714.7831691.047660.733644.95751.211087.001360.091543.359322.502472.555294.571434.767493.055492.435302.939356.914419.3231180.0441605.678723.7181387.0071342.7511064.3961763.079846.6641036.5761179.5732365.1371641.2751608.731909.3761041.9781223.2151671.997591.1961823.2081063.024780.584747.305478.9481270.0741703.4481220.3921448.933NANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▂▄▇▇█▃▂▃▄▁▂▁▃▁▂▂▂▁▁637.28949.1831719.3291764.7891991.655858.578691.886804.7651162.924432.298639.191423.784727.06455.129505.369576.834539.78354.183420.088NANANA797.508NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Land ▆▇▇▇▇▇█▇▆▆▇███▇▁▁▁▁▁5038.875068.8435069.2065069.2065070.1265070.2085111.6065087.0295056.0465061.5325072.5685108.4915108.885105.3765080.6794880.3314880.3374879.0154879.024879.02NANA4806.021NANANA4785.772NANANA4450.532NANANA2605.162NANANA2356.522NANANA2216.768NANANA1983.064NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:FurnitureAndFixturesGross ██▇▇▆▅▅▆▅▅▅▆▅▄▃▃▃▃▁▁51.51751.54949.60649.20944.63544.26344.31344.90844.46243.0844.35144.69644.16441.50737.92837.61237.13636.58932.68731.724NANA29.852NANANA27.986NANANA25.164NANANA23.441NANANA26.359NANANA24.043NANANA23.679NANANA
us-gaap:LeaseholdImprovementsGross ██▇▇▇▆▆▆▅▅▄▄▃▃▃▃▂▂▁▁2839.3582816.7262752.882687.9112664.2942641.4482656.4392559.9072486.2692444.3582396.9322322.5522278.7552266.7962219.6082186.9532136.7392111.3362060.3152001.259NANA1920.247NANANA1752.115NANANA1617.401NANANA1435.508NANANA1262.616NANANA1090.462NANANA922.224NANANA
us-gaap:ConstructionInProgressGross ▃▃▃▂▃▃▂▄▃▁▁▄▅▆▆▇▆▅▄▄▃▃▂▂▃▃▂▂▆███▇▅▄▄▂▃▃▃▄▂▅908.061794.039868.773769.846893.935804.179789.736953.336812.408647.469578.7961057.2611163.041262.8861269.3381386.6381348.8381211.3241037.959954.013865.359857.578763.935725.601880.996797.148736.311715.6091309.7811564.8211523.1791502.0171483.1141145.5171036.78937.475732.734870.006818.685899.302982.318681.3421073.402NANANA563.645NANANA
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ██████▆▆▆▆▆▅▄▄▄▄▅▅▅▅▂▂▂▂▁▁▁▁▁▁▁▁▁▄▄▄▄▄▄▅▅▅▅1305.5891307.7251310.4781377.2911339.7241377.338955.647933.255936.835976.58956.309925.431682.507666.718619.925611.8819.368793.932775.198775.659252.618235.904235.224217.529209.974196.188193.394180.149176.939127.356126.084129.038137.975652.807659.916664.69670.653667.377669.722770.466772.502762.522767.252NANANA763.636NANANA
us-gaap:OperatingLeaseRightOfUseAsset █▇▇▇▇▇▇▇▇▇▁170.331144.143146.406146.973147.512148.057148.64149.231149.839151.1660.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:LongTermDebt NANA2931.986NANANA2949.154NANANA2995.328NANANA3013.961NANANA2031.615NANANA3358.479NANANA4170.773NANANA4258.53NANANA3063.841NANANA3099.473NANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:FairValueByMeasurementBasis us-gaap:CarryingReportedAmountFairValueDisclosure▇▇███▆▆▆▆▄▄▄▄▃▃▃▃▂▂▂▂▃▁▂▂▂▃▄▄▄▅▅▅12536.06512536.26413047.75813048.16113048.57912061.22411811.80611838.73811846.24111005.55811007.75710889.70210721.87810339.31310271.61110234.63410236.6399706.8459616.1339628.9229754.0849980.3669036.5139729.7969867.4599886.6969906.98410475.7510558.60910577.13511341.50811354.36911365.545NA8912.369NANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:FairValueByMeasurementBasis us-gaap:EstimateOfFairValueFairValueDisclosure▇▇███▅▅▅▅▃▃▃▃▂▃▃▃▂▂▂▂▃▁▂▂▃▂▃▃▃▄▄▄13438.8413242.64514265.00314175.64814174.0912254.42312311.89212402.00812259.89911033.24110874.04610745.70210626.60910334.49710549.53510582.78110572.969948.099828.65810182.61710373.41810488.7529357.58710151.02810310.40910484.32810401.51610943.99311087.41911033.25911657.1311737.38111776.52NA9697.98NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA18.02NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty bxp:SumnerSquareNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA10.262NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty bxp:SumnerSquareNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA9.277NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty bxp:SumnerSquareNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA9.476NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty bxp:SumnerSquareNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:StockholdersEquity ▆▆▇██▇▆▆▆▇▇▇▇▇▇▇▇▆▆▆▆▆▆▇▆▆▆▆▆▆▆▆▆▄▄▄▄▃▃▃▂▂▁5749.3425775.6415996.0836129.5686182.0676047.8665684.6875671.9545715.8535836.6185883.1715876.5665892.845879.0285813.9575825.2185814.3745775.5335786.2955725.9315732.8975749.7835709.4355851.9155782.9785782.1725697.2985725.0265691.0295702.075741.1535683.065624.8485256.8745097.0655119.3565134.0544963.1524865.9984825.5364757.9144696.0424372.643NANANA4446.002NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▇▇████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▅▅▅▅▄▄▃▂▂▂▂▂▂▂▂▁▁▁▁▁8089.9938121.3478339.6128495.0388547.1468420.8838014.2367995.7678020.6678170.2878213.9688205.9748213.2428184.098102.4568099.6958073.3527922.4387931.9247859.2537898.2197929.797886.9278062.7597988.4477998.9487902.9367047.5937013.97002.5447043.6186741.8626684.3725805.255634.8545685.6515705.7355519.8155413.5165384.1615336.5435289.4594964.1935078.0935068.945065.4815069.059NANANA
us-gaap:CommonStockValue ██████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▆▆▅▄▄▄▃▁1.5611.5611.5571.5561.5561.5531.5481.5461.5461.5451.5451.5441.5441.5441.5431.5431.5431.5381.5381.5381.5371.5361.5361.5361.5351.5341.5311.5311.5311.531.531.5241.5241.5161.5161.5091.5071.4941.4811.4761.4641.4511.402NANANA1.389NANANA
us-gaap:AdditionalPaidInCapital ██████████████████████████▇▅▅▅▅▄▄▄▄▄▄▃▃▃▃▂▁6405.9166392.9236356.7916348.0766340.6656321.4756294.7196274.7926278.9616414.6126407.6236400.1936391.466384.1476377.9086370.9326363.0346339.976333.4246326.586316.1916306.7236305.6876300.786293.5566286.266270.2575684.6495679.5785668.235662.4535250.1745246.2435232.035222.0735194.5695184.715050.5474936.4574916.444846.0034771.6594417.162NANANA4373.679NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▂▂▃▄▄▃▁▁▁▁▂▂▂▂▁▂▂▁▂▁▂▂▁▂▁▂▁▅▅▅▆██▅▆▆▆▆▆▆▆▆▆-612.247-570.982-509.653-364.72-302.511-416.74-760.523-749.666-710.592-728.083-675.534-677.312-649.747-654.879-712.343-692.739-694.32-712.27-693.694-725.522-702.361-699.048-780.952-627.054-711.239-690.993-762.464-148.566-176.929-153.979-108.552246.206192.492-160.697-109.985-59.621-34.463-70.609-53.08-72.941-69.537-56.479-24.763NANANA95.433NANANA
 us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:CumulativeEffectPeriodOfAdoption,us-gaap:StatementEquityComponents srt:CumulativeEffectPeriodOfAdoptionAdjustment,us-gaap:RetainedEarningsNANA1.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▄▄▃▃▃▄▃▃▄▄▄▄▄▄▃▃▃▃▁▁▃▇▆█▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▆-43.166-45.139-49.89-52.622-54.921-55.7-48.335-51.996-51.34-48.734-47.741-45.137-47.695-49.062-50.429-51.796-53.161-50.983-52.251-73.943-79.748-56.706-14.114-20.6251.848-11.907-9.304-9.866-10.429-10.989-11.556-12.122-12.689-13.253-13.817-14.379-14.978-15.558-16.138-16.717-17.294-17.867-18.436NANANA-21.777NANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax dei:LegalEntity bxp:BostonPropertiesLimitedPartnership█▇▄▂▁-43.166-45.139-49.89-52.622-54.921NA-48.335NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▃▇▅▇▄▇▅▇▄▇▄▇▅▆▄▃▅▆▃▅▇▄▃▅▄▅▃▄▃▅▄▂▅▄▃▃▃▃▃▃▃▁▃▃▁408.413152.063374.417228.151379.075175.197361.373254.188358.37207.234379.618209.781335.068225.778314.733220.434125.748246.53293.089159.634235.171348.98190.533165.802241.63201.446225.876160.684184.784124.209227.505215.58397.409237.429179.263132.606161.819169.261163.469152.758157.817132.28443.039122.35150.4160.094NANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▅▅▅▆▆▄▄▆▅▆▃▄▅▄▆▄▅▅▂▄▆▂██▆▅▅▅▅▆▆▆▃▅▅▆▁▆█▆▆▄▃▅▅-321.338-242.273-225.308-267.889-46.729-73.793-278.625-408.514-104.437-223.515-78.809-534.266-302.013-183.788-275.387-82.957-276.877-262.593-224.673-678.792-316.235-109.357-679.027219.636176.442.725-176.868-141.685-199.499-147.072-79.195-1.143-19.311-432.991-257.92-213.698-46.304-760.11-59.694159.704-69.077-121.029-385.568-490.14-132.62-152.946NANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity bxp:BostonPropertiesLimitedPartnership▃▄▅▄█▇▄▁-321.338-242.273-225.308-267.889-46.729-73.793-278.625-408.514NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▃▄▄▇▅▄▄▆▄▅▅▆▅▅▄▆▅▄▄▄▇▄▄▄▂█▄▄▁▇▄▇▅▄▄█▃▇▅▅▆▃▅▆▄-398.978-679.936-194.569-187.128800.73165.288-195.627-203.833476.693-190.612-85.40221.209238.876-92.23-97.634-136.857340.625-37.912-130.825-241.563-344.57642.337-174.795-341.182-139.715-902.854867.407-208.911-128.282-1162.701575.552-181.896621.25762.96-102.58-367.69965.286-641.163656.409-30.022-55.461257.102-448.597-65.584465.266-135.689NANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity bxp:BostonPropertiesLimitedPartnership▂▁▃▃█▅▃▃-398.978-679.936-194.569-187.128800.73165.288-195.627-203.833NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▃▁▄▃█▄▃▃▇▃▅▃▅▄▄▄▅▄-311.903-770.146-45.46-226.8661133.077166.692-112.879-358.159730.626-206.893215.407-303.276271.931-50.24-71.46537.054185.597-65.905NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect dei:LegalEntity bxp:BostonPropertiesLimitedPartnership▃▁▄▃█▄▃▃-311.903-770.146-45.46-226.8661133.077166.692-112.879-358.159NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:DepreciationDepletionAndAmortization ▇▆▆▆▇▆▆▆▆▆▆▅▅▆▅▅▅▅▇█▅▅▆▅▆▅▆▅▅▅▅▅▄▃▃▃▃▃▃▃▃▃▂▁▁▁183.838176.565168.013166.456178.188171.094169.897165.862177.411164.594165.439157.996156.417165.797154.259152.164151.919159.205178.032203.748153.175159.448164.46153.015167.844154.223162.43157.245154.628154.27155.409154.193134.604121.191121.061111.36111.886109.737109.181109.495111.08109.42892.76381.13381.483.075NANANANA
us-gaap:IncreaseDecreaseInAccountsReceivable ▅▁▄▄▄▂▅▅▄▆▁█▃▂▅▃▆▂▆▃▆▁▇▆▅▄▅▃▆▂▅▃▆▃▅▄▃▂█▅▃▄▅▅▃▄8.91-26.02-4.007-0.027-0.732-17.7844.1999.163-2.48614.0-27.62631.434-10.222-22.7910.095-10.49516.99-19.02318.447-8.17211.055-25.01826.47511.2637.4151.1733.385-8.13813.536-21.6524.071-10.64617.708-10.695.5251.44-7.434-22.68632.4933.249-10.273-6.0738.0377.626-10.8150.267NANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities █▃▇▅▇▄▇▅▇▄▇▄▇▅▆▄▃▅▆▃▅▇▄▃▅▄▅▃▄▃▅▄▂▅▄▃▃▃▃▃▃▃▁▃▃▁408.413152.063374.417228.151379.075175.197361.373254.188358.37207.234379.618209.781335.068225.778314.733220.434125.748246.53293.089159.634235.171348.98190.533165.802241.63201.446225.876160.684184.784124.209227.505215.58397.409237.429179.263132.606161.819169.261163.469152.758157.817132.28443.039122.35150.4160.094NANANANA
us-gaap:NetIncomeLoss ▃▃▁▂▅█▃▃▃▃▃▃▃▄▃▃▃▃▃▂▃▄▃▄▂▄▄▃▂▂▂▃▇▂▂▂▃▂▃▂▂▂▁▂▂▂▂▂▂▂111.703100.59610.31192.479269.15500.121140.824110.396166.943100.73148.529121.743131.306178.646103.829119.962136.33499.708147.21479.34299.186184.365137.851186.72982.078173.771174.51130.37179.14556.62388.719155.324455.03548.065.457.769118.55964.632101.64470.54260.21440.813-12.90357.66861.41252.71453.31765.79567.15244.598
us-gaap:ProfitLoss ▃▃▁▃▅█▃▃▄▃▃▃▃▄▃▃▃▃▃▂▃▄▃▅▂▄▄▃▂▂▂▃▇▂▂▂▃▂▃▂▂▂▁▂▂▂141.25128.14724.905118.06298.58577.146176.009141.37203.461131.159185.241150.445160.565216.312132.203147.704167.01115.564164.89471.504117.357216.222166.738323.271100.739209.17211.425150.97595.90167.756106.312170.436506.76157.93157.2866.103134.17474.01115.44380.45169.73848.194-12.75668.08972.48762.507NANANANA
us-gaap:ShareBasedCompensation ▄▆▂▂▃▅▂▂▃▄▂▂▂▄▂▂▂▃▂▂▂▃▂▂▁▃▁▁▂▃▁▂▂█▁▂▂▃▁▁▁▃▁▂▂▄14.2820.097.998.25310.37417.5257.7057.80910.39415.058.4178.4578.47114.7728.1018.0238.43510.8027.6217.6437.57810.0696.3586.3455.46911.0115.3915.8096.51910.386.1546.5376.68125.7834.826.7466.75511.3585.975.9375.90911.8566.1276.386.33414.011NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▅▅▅▆▆▄▄▆▅▆▃▄▅▄▆▄▅▅▂▄▆▂██▆▅▅▅▅▆▆▆▃▅▅▆▁▆█▆▆▄▃▅▅-321.338-242.273-225.308-267.889-46.729-73.793-278.625-408.514-104.437-223.515-78.809-534.266-302.013-183.788-275.387-82.957-276.877-262.593-224.673-678.792-316.235-109.357-679.027219.636176.442.725-176.868-141.685-199.499-147.072-79.195-1.143-19.311-432.991-257.92-213.698-46.304-760.11-59.694159.704-69.077-121.029-385.568-490.14-132.62-152.946NANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity bxp:BostonPropertiesLimitedPartnership▃▄▅▄█▇▄▁-321.338-242.273-225.308-267.889-46.729-73.793-278.625-408.514NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty bxp:A153211SecondAvenueNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty,us-gaap:StatementScenario bxp:A11251RogerBaconDrive,us-gaap:ScenarioPlanNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty,us-gaap:StatementScenario bxp:ShadyGroveBioTechCampus,us-gaap:ScenarioPlanNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty,us-gaap:SubsequentEventType bxp:SafecoPlaza,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty,us-gaap:SubsequentEventType bxp:ShadyGroveBioTechCampus,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty,us-gaap:SubsequentEventType bxp:WalthamLabProperties,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▃▄▄▇▅▄▄▆▄▅▅▆▅▅▄▆▅▄▄▄▇▄▄▄▂█▄▄▁▇▄▇▅▄▄█▃▇▅▅▆▃▅▆▄-398.978-679.936-194.569-187.128800.73165.288-195.627-203.833476.693-190.612-85.40221.209238.876-92.23-97.634-136.857340.625-37.912-130.825-241.563-344.57642.337-174.795-341.182-139.715-902.854867.407-208.911-128.282-1162.701575.552-181.896621.25762.96-102.58-367.69965.286-641.163656.409-30.022-55.461257.102-448.597-65.584465.266-135.689NANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity bxp:BostonPropertiesLimitedPartnership▂▁▃▃█▅▃▃-398.978-679.936-194.569-187.128800.73165.288-195.627-203.833NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividends ▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▃▁▁▁█▁▁▁▅▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁171.551171.566172.332172.333172.275171.964166.667166.666166.599166.362166.364140.51140.466140.288131.678131.679131.666131.555114.364114.361114.334328.567114.18114.179114.156883.684113.95113.702116.282496.33113.678113.989112.511110.9493.90593.72592.95792.31283.99683.77183.38881.44281.43381.20881.09480.951NANANANA
us-gaap:Dividends ▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▃▃▃█▃▃▃▅▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃-170.266172.8172.344172.326172.326172.277171.959166.668166.666166.6166.36166.365140.511140.466140.284131.681131.68131.665131.634114.328114.326114.326328.588114.199114.249114.005883.705113.915113.583113.268495.789112.952112.927110.158109.87592.95992.9392.22591.47183.15482.89682.60780.60180.59180.36780.279NANANANA
 us-gaap:Dividends us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▁███████████▇▇▇▇▇▇▇▇▇▇-17.25317.28717.117.18317.19417.44417.64317.217.20617.18517.00117.02214.35714.35114.20213.31513.32413.65313.58711.78711.84811.865NANANANANANANA11.21849.49211.25111.25911.44611.33410.010.03610.06410.0129.349.70210.07810.50110.56210.7310.777NANANANA
 us-gaap:Dividends us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▃▃▃█▃▃▃▅▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃-153.013155.513155.244155.143155.132154.833154.316149.468149.46149.415149.359149.343126.154126.115126.082118.366118.356118.012118.047102.541102.478102.461294.448102.47102.376102.3791.183102.162102.128102.05446.297101.701101.66898.71298.54182.95982.89482.16181.45973.81473.19472.52970.170.02969.63769.502NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31

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
Value1561000.01561000.01557000.01556000.01556000.01553000.01548000.01546000.01546000.01545000.01545000.01544000.01544000.01544000.01543000.01543000.01543000.01538000.01538000.01538000.01537000.01536000.01536000.01536000.01535000.01534000.01531000.01531000.01531000.01530000.01530000.01524000.01524000.01516000.01516000.01509000.01507000.01494000.01481000.01476000.01464000.01451000.01402000.01389000.0
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

us-gaap:CommonStockValue bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan

us-gaap:RestrictedStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value3600000.03200000.04000000.04000000.04000000.03500000.03500000.03500000.03500000.03000000.02400000.02400000.02400000.02200000.04900000.04900000.04900000.04700000.02500000.02500000.02500000.02100000.04800000.04800000.04800000.04400000.02600000.02600000.02600000.02300000.03900000.03900000.03900000.03700000.02200000.02200000.02200000.02100000.01800000.01800000.01800000.01600000.04500000.02800000.0500000.0
Percentage of CommonStockValue230.6205.0256.9257.1257.1225.4226.1226.4226.4194.2155.3155.4155.4142.5317.6317.6317.6305.6162.5162.5162.7136.7312.5312.5312.7286.8169.8169.8169.8150.3254.9255.9255.9244.1145.1145.8146.0140.6121.5122.0123.0110.3321.0201.60.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:RestrictedStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Preferred Stock Par Or Stated Value Per Share

us-gaap:PreferredStockParOrStatedValuePerShare us-gaap:StatementClassOfStock

us-gaap:PreferredStockParOrStatedValuePerShare

bxp:SeriesBCumulativeRedeemablePreferredStockUnit


Preferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value0.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010
Percentage of PreferredStockParOrStatedValuePerShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-05-232018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-05-172016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-05-202014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1561561551551551551541541541541541541540.0368361541541541541531531531530.0015071531531531531531531531530.007542153153152152151151150150149148147146145140138
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockSharesIssued bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan

us-gaap:RestrictedStock


Common
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312013-02-012012-12-312012-09-302012-06-302012-03-312012-02-032011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value0.029630.029630.0245030.0265030.0265030.0265030.0230830.020320.020320.020320.0182260.0374140.0374140.0374140.0358390.0220670.0220670.0220670.0185210.034150.034150.034150.0309650.0239680.0239680.0239680.0214550.036730.036730.036730.0350870.0350870.0207560.0207560.0207560.0195210.0195210.019030.019030.019030.0177950.0694990.0628760.004723
Percentage of CommonStockSharesIssued0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


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
Value156156155155155155154154154154154154154154154154154153153153153153153153153153153153153153152152152151151150150149148147146145140138
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockSharesOutstanding us-gaap:ConsolidatedEntities

us-gaap:GeneralPartner


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1.7371.7371.7311.7311.7311.7311.7271.7261.7261.7251.7221.7221.7221.7221.721.718
Percentage of CommonStockSharesOutstanding1.11.11.11.11.11.11.11.11.11.11.11.11.11.11.11.1

us-gaap:LimitedPartner


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value154154153153153153153152152152152152152152152152
Percentage of CommonStockSharesOutstanding98.998.998.998.998.998.998.998.998.998.998.998.998.998.998.998.9

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value1561561551551551551541541541541541541541541541541541531531531531531531531531531531531531531521521521511511501501491481470.1463871451401400.139273139138121119
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.1100.0100.00.00.00.0100.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value156156155155155154154154154154154154154154154153153153153153153153153152152151151150148147146142140139139
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value173173172172172172172
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding110.9110.9110.9111.1111.3111.4111.4

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value156155155155155154154154154154154154154153153153153153153153153153153152151151150150148147145142139139138
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value173173172172172172172
Percentage of WeightedAverageNumberOfSharesOutstandingBasic110.9111.0110.9111.1111.3111.4111.4

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
Value0.720.590.050.581.723.210.910.71.060.630.960.770.831.140.670.760.870.630.960.50.631.180.91.20.521.121.140.830.50.350.581.02.950.320.430.380.790.440.690.480.410.29-0.090.410.440.380.380.470.540.37
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

bxp:BostonPropertiesLimitedPartnership


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.730.610.060.591.753.280.920.711.08
Percentage of EarningsPerShareBasic101.4103.4120.0101.7101.7102.2101.1101.4101.9

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
Value0.710.590.050.581.713.20.910.71.060.630.960.770.831.140.670.760.870.630.960.50.631.180.91.20.521.111.140.830.50.350.581.02.940.310.430.380.780.430.690.480.410.29-0.090.410.440.380.380.470.530.37
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

bxp:BostonPropertiesLimitedPartnership


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.730.610.060.591.753.270.920.711.08
Percentage of EarningsPerShareDiluted102.8103.4120.0101.7102.3102.2101.1101.4101.9

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value14197.78.010177.47.510147.97.97.9147.67.57.9107.07.17.19.45.95.95.1105.05.06.29.95.86.26.4254.56.46.4105.65.65.6115.96.16.113
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.02.81.21.21.52.31.01.01.42.01.11.21.22.11.21.11.21.61.11.11.11.40.90.90.81.60.80.81.11.71.01.11.25.30.91.41.42.41.21.21.32.81.51.61.53.7

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
Value11310513942694921471091649914812413218010712113410017185761411471649517117713079579215545548485811965101716041-11.619586253
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 Revenues15.914.82.013.741.265.519.414.822.413.721.118.120.027.216.518.420.416.027.013.612.221.323.626.115.527.729.021.213.510.016.027.288.410.110.212.425.314.622.515.713.99.9-3.015.115.814.1

us-gaap:ComprehensiveIncomeNetOfTax dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value12812015106305560165124185
Percentage of ComprehensiveIncomeNetOfTax112.6113.9120.4112.7113.2113.8112.6113.0112.8
Percentage of Revenues17.916.82.415.446.774.521.916.725.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership17.916.80.015.446.774.50.016.725.3

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
Value29271425297732303630342829372527301515-7.8381831261361835342016111415519.9319.1038.334159.378149.9099.5247.3810.44510119.793
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 Revenues4.13.92.23.74.510.24.34.25.04.24.84.24.45.73.94.24.72.52.4-1.32.94.84.221.73.05.75.63.32.81.92.62.610.02.11.91.83.32.13.12.22.21.80.12.72.82.6

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value17161415-0.62319161817
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest58.660.396.861.4-2.125.550.660.148.3
Percentage of Revenues2.42.32.12.3-0.12.62.22.52.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership2.42.30.02.3-0.12.60.02.52.4

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
Value143133281202995691801402001301821531622171331491621172047885158175293117206212151966810617150758576613474116817048-11.505687363
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 Revenues20.118.74.217.445.875.623.818.927.417.925.922.424.433.020.422.724.718.532.112.513.723.828.146.618.933.434.624.516.411.918.629.898.512.112.114.228.616.725.617.916.111.7-2.917.818.716.7

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value14513629122304580182142203
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest101.2102.3106.2101.4101.8102.0101.0101.3101.2
Percentage of Revenues20.419.14.517.746.677.124.019.227.7
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership20.419.10.017.746.677.10.019.227.7

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold dei:LegalEntity, us-gaap:ConsolidationItems

us-gaap:CostOfGoodsAndServicesSold

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


Cost
Period End2021-06-302021-03-312020-06-302020-03-31
Value-2.655-3.505-2.484-3.237
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0
Percentage of Revenues-0.4-0.5-0.4-0.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:CostOfGoodsAndServicesSold dei:LegalEntity, us-gaap:ProductOrService

bxp:BostonPropertiesLimitedPartnership, srt:Hotel


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1.9962.0511.1783.1641.9736.8218.3188.7439.08
Percentage of CostOfGoodsAndServicesSold-75.2-58.50.00.0-79.4-210.70.00.00.0
Percentage of Revenues0.30.30.20.50.30.91.11.21.2
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership srt:Hotel0.00.00.00.00.00.00.00.00.0

bxp:BostonPropertiesLimitedPartnership, us-gaap:ManagementService


Cost
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value3.5052.8962.4843.2372.4292.403
Percentage of CostOfGoodsAndServicesSold-100.00.0-100.0-100.00.00.0
Percentage of Revenues0.50.40.40.40.30.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:ManagementService0.00.00.00.00.00.0

bxp:BostonPropertiesLimitedPartnership, us-gaap:RealEstateOther


Cost
Period End2021-06-302020-06-30
Value2.6552.484
Percentage of CostOfGoodsAndServicesSold-100.0-100.0
Percentage of Revenues0.40.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:RealEstateOther0.00.0

us-gaap:CostOfGoodsAndServicesSold dei:LegalEntity, us-gaap:StatementBusinessSegments

bxp:BostonPropertiesLimitedPartnership, us-gaap:IntersegmentElimination


Cost
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-3.009-2.896-2.484-2.159-2.429-2.403
Percentage of CostOfGoodsAndServicesSold0.00.0100.00.00.00.0
Percentage of Revenues-0.5-0.4-0.4-0.3-0.3-0.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:IntersegmentElimination0.00.00.00.00.00.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Cost
Period End2021-06-302021-03-312020-06-302020-03-31
Value-2.655-3.505-2.484-3.237
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0
Percentage of Revenues-0.4-0.5-0.4-0.4
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

srt:Hotel


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.9962.0511.1783.1641.9736.8218.3188.7439.087.8638.2218.8288.7418.073
Percentage of CostOfGoodsAndServicesSold-75.2-58.50.00.0-79.4-210.70.00.00.00.00.00.00.00.0
Percentage of Revenues0.30.30.20.50.30.91.11.21.21.11.21.31.31.2
Percentage of Revenues srt:Hotel0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RealEstateOther


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2.6553.5053.0092.8962.4843.2372.1592.4292.403
Percentage of CostOfGoodsAndServicesSold-100.0-100.00.00.0-100.0-100.00.00.00.0
Percentage of Revenues0.40.50.50.40.40.40.30.30.3
Percentage of Revenues us-gaap:RealEstateOther0.00.00.00.00.00.00.00.00.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService, us-gaap:StatementGeographical

srt:Hotel, bxp:Boston


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.9962.0511.1783.1641.9736.8218.3188.7439.087.8638.2218.8288.741
Percentage of CostOfGoodsAndServicesSold-75.2-58.50.00.0-79.4-210.70.00.00.00.00.00.00.0
Percentage of Revenues0.30.30.20.50.30.91.11.21.21.11.21.31.3
Percentage of Revenues srt:Hotel bxp:Boston0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Cost
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3.009-2.896-2.484-3.237-2.159-2.429-2.403-3.395-2.219-2.516-1.97-2.885
Percentage of CostOfGoodsAndServicesSold0.00.0100.0100.00.00.00.00.00.00.00.00.0
Percentage of Revenues-0.5-0.4-0.4-0.4-0.3-0.3-0.3-0.5-0.3-0.4-0.3-0.4
Percentage of Revenues us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.0

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
Value476484459458460481482474482475456447433452425423418426436467405415413402413412404404388397375386344352316308298303290287282279243235228232
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 Revenues66.767.969.166.270.363.963.763.865.765.564.865.365.368.565.064.563.767.468.674.865.062.466.363.866.966.766.065.365.969.265.267.466.973.066.165.463.267.764.263.664.767.062.160.958.061.6

us-gaap:CostsAndExpenses dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value474481457457458479480472480
Percentage of CostsAndExpenses99.699.499.699.699.699.699.699.699.5
Percentage of Revenues66.567.568.965.970.163.763.563.565.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership66.567.50.065.970.163.70.063.565.4

bxp:UnconsolidatedJointVentures


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
Value707175737167595254596074373735393636363325252624242525242424252459818181818085911471519596159156
Percentage of CostsAndExpenses14.814.716.416.015.414.012.411.011.412.413.216.68.68.38.39.38.78.58.47.26.36.26.46.16.06.16.46.26.36.26.86.417.323.225.826.527.526.729.431.752.354.039.440.869.867.3
Percentage of Revenues9.910.011.310.610.99.07.97.07.58.18.510.95.65.75.46.05.55.85.85.44.13.94.23.94.04.14.24.04.24.34.44.311.616.917.017.317.418.018.920.233.836.224.524.940.541.5
Percentage of Revenues bxp:UnconsolidatedJointVentures77.281.60.083.779.472.40.068.968.571.30.097.865.566.50.071.365.066.40.069.066.668.30.064.763.364.10.059.564.164.60.065.259.760.20.060.052.558.10.060.9101.7103.80.061.9105.5103.9

Gain Loss On Investments

us-gaap:GainLossOnInvestments

us-gaap:GainLossOnInvestments


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2275000.01659000.04296000.01858000.04552000.0-5445000.02177000.0106000.01165000.02969000.0-3319000.01075000.0505000.0-126000.0962000.0944000.0730000.01042000.0560000.0976000.0478000.0259000.0493000.0-1515000.0-24000.0393000.0387000.0-297000.0662000.0286000.01039000.0956000.0181000.0735000.0187000.0587000.0-186000.0801000.038000.0-860000.06000.0373000.0682000.0731000.0-678000.0200000.0
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.30.20.60.30.7-0.70.30.00.20.4-0.50.20.1-0.00.10.10.10.20.10.20.10.00.1-0.2-0.00.10.1-0.00.10.00.20.20.00.20.00.1-0.00.20.0-0.20.00.10.20.2-0.20.1

us-gaap:GainLossOnInvestments dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2275000.01659000.04296000.01858000.04552000.0-5445000.02177000.0106000.01165000.0
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.30.20.60.30.7-0.70.30.00.2
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership0.30.20.00.30.7-0.70.00.00.2

us-gaap:GainLossOnInvestments dei:LegalEntity, us-gaap:ConsolidationItems

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


Gain
Period End2021-06-302021-03-312020-06-302020-03-31
Value-2275000.0-1659000.0-4552000.05445000.0
Percentage of GainLossOnInvestments-100.0-100.0-100.0-100.0
Percentage of Revenues-0.3-0.2-0.70.7
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:GainLossOnInvestments dei:LegalEntity, us-gaap:StatementBusinessSegments

bxp:BostonPropertiesLimitedPartnership, us-gaap:IntersegmentElimination


Gain
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-4296000.0-1858000.0-4552000.0-2177000.0-106000.0-1165000.0
Percentage of GainLossOnInvestments-100.0-100.0-100.0-100.0-100.0-100.0
Percentage of Revenues-0.6-0.3-0.7-0.3-0.0-0.2
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:IntersegmentElimination0.00.00.00.00.00.0

us-gaap:GainLossOnInvestments us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Gain
Period End2021-06-302021-03-312020-06-302020-03-31
Value-2275000.0-1659000.0-4552000.05445000.0
Percentage of GainLossOnInvestments-100.0-100.0-100.0-100.0
Percentage of Revenues-0.3-0.2-0.70.7
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:GainLossOnInvestments us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-4296000.0-1858000.0-4552000.05445000.0-2177000.0-106000.0-1165000.0-2969000.03319000.0-1075000.0-505000.0126000.0-962000.0-944000.0-730000.0-1042000.0-560000.0-976000.0-478000.0259000.0493000.0-1515000.0-24000.0393000.0387000.0-297000.0662000.0286000.01039000.0956000.0181000.0735000.0187000.0587000.0-186000.0801000.038000.0-860000.0
Percentage of GainLossOnInvestments-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.6-0.3-0.70.7-0.3-0.0-0.2-0.40.5-0.2-0.10.0-0.1-0.1-0.1-0.2-0.1-0.2-0.10.00.1-0.2-0.00.10.1-0.00.10.00.20.20.00.20.00.1-0.00.20.0-0.2
Percentage of Revenues us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302021-03-312019-12-312019-09-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312010-12-312010-09-302010-06-302010-03-31
Value0.0-0.898-1.53-28.01-16.490.00.0-13.8580.0140.0-0.3710.0-22.040.0-10.6330.00.00.0-0.030.1520.00.0-5.4940.2740.767-81.6620.0-6.051-2.17
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0100.0100.0100.00.00.0100.00.0100.00.0100.00.0100.00.0100.00.00.00.0100.0100.00.00.0100.0100.0100.0100.00.0100.0100.0
Percentage of Revenues0.0-0.1-0.2-3.8-2.30.00.0-2.10.02.20.0-0.10.0-3.50.0-1.70.00.00.0-0.00.00.00.0-1.20.10.2-20.80.0-1.5-0.6

us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Gains
Period End2021-06-302021-03-312019-12-312019-09-30
Value0.0-0.898-57.5528
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.03761.4-100.0
Percentage of Revenues0.0-0.1-7.63.8
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership0.0-0.10.03.8

us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity, us-gaap:ConsolidationItems

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


Gains
Period End2021-06-302021-03-31
Value0.0-0.898
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0
Percentage of Revenues0.0-0.1
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:MaterialReconcilingItems0.00.0

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

bxp:BostonPropertiesLimitedPartnership, bxp:FourPointTwoEightNinePercentUnsecuredSeniorNotes, us-gaap:SeniorNotes


Gains
Period End2021-02-14
Value-0.4
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of Revenues0.0
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership bxp:FourPointTwoEightNinePercentUnsecuredSeniorNotes us-gaap:SeniorNotes0.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Gains
Period End2021-06-302021-03-31
Value0.0-0.898
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0
Percentage of Revenues0.0-0.1
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:CreditFacility

bxp:DelayedDrawFacility


Gains
Period End2021-03-16
Value-0.5
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of Revenues0.0
Percentage of Revenues bxp:DelayedDrawFacility0.0

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
Value38443127373632313541272928352925273125252529242022282322232920242243151919271917202417181726
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 Revenues5.46.34.74.05.84.84.34.24.85.83.94.34.35.44.53.94.15.04.04.04.14.43.93.33.64.73.83.73.95.23.64.34.39.03.34.24.06.24.33.84.65.94.44.74.57.1

us-gaap:GeneralAndAdministrativeExpense dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value384431273736323135
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.46.34.74.05.84.84.34.24.8
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership5.46.30.04.05.84.80.04.24.8

us-gaap:GeneralAndAdministrativeExpense dei:LegalEntity, us-gaap:ConsolidationItems

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


General
Period End2021-06-302021-03-312020-06-302020-03-31
Value-38.405-44.959-37.743-36.454
Percentage of GeneralAndAdministrativeExpense-100.0-100.0-100.0-100.0
Percentage of Revenues-5.4-6.3-5.8-4.8
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense dei:LegalEntity, us-gaap:StatementBusinessSegments

bxp:BostonPropertiesLimitedPartnership, us-gaap:IntersegmentElimination


General
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-31.053-27.862-37.743-32.797-31.147-35.071
Percentage of GeneralAndAdministrativeExpense-100.0-100.0-100.0-100.0-100.0-100.0
Percentage of Revenues-4.7-4.0-5.8-4.3-4.2-4.8
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:IntersegmentElimination0.00.00.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


General
Period End2021-06-302021-03-312020-06-302020-03-31
Value-38.405-44.959-37.743-36.454
Percentage of GeneralAndAdministrativeExpense-100.0-100.0-100.0-100.0
Percentage of Revenues-5.4-6.3-5.8-4.8
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


General
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-31.053-27.862-37.743-36.454-32.797-31.147-35.071-41.762-27.683-29.677-28.468-35.894-29.396-25.792-27.141-31.386-25.293-25.165-25.4182924202228232223292024224315191927191618
Percentage of GeneralAndAdministrativeExpense-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.797.693.3
Percentage of Revenues-4.7-4.0-5.8-4.8-4.3-4.2-4.8-5.8-3.9-4.3-4.3-5.4-4.5-3.9-4.1-5.0-4.0-4.0-4.14.43.93.33.64.73.83.73.95.23.64.34.39.03.34.24.06.24.33.74.3
Percentage of Revenues us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value453443398421402471467456454447429411406
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues63.562.259.960.861.562.761.761.461.961.760.960.061.2

us-gaap:GrossProfit dei:LegalEntity

bxp:UnconsolidatedJointVentures


Gross
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value241324272824232425252216
Percentage of GrossProfit5.63.35.96.96.15.35.15.45.75.85.54.0
Percentage of Revenues3.52.03.64.33.83.23.13.43.53.63.32.4
Percentage of Revenues bxp:UnconsolidatedJointVentures28.40.028.431.230.90.030.430.830.60.029.628.4

us-gaap:GrossProfit dei:LegalEntity, us-gaap:ConsolidationItems

bxp:UnconsolidatedJointVentures, us-gaap:MaterialReconcilingItems


Gross
Period End2021-06-302021-03-312020-06-302020-03-31
Value-25.417-24.795-27.911-28.758
Percentage of GrossProfit-5.6-5.6-6.9-6.1
Percentage of Revenues-3.6-3.5-4.3-3.8
Percentage of Revenues bxp:UnconsolidatedJointVentures us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:GrossProfit dei:LegalEntity, us-gaap:ConsolidationItems, us-gaap:StatementEquityComponents

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems, bxp:Noncontrollinginterestpropertypartnerships


Gross
Period End2021-06-302021-03-312020-06-302020-03-31
Value-46.287-44.376-32.427-47.661
Percentage of GrossProfit-10.2-10.0-8.1-10.1
Percentage of Revenues-6.5-6.2-5.0-6.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:MaterialReconcilingItems bxp:Noncontrollinginterestpropertypartnerships0.00.00.00.0

us-gaap:GrossProfit dei:LegalEntity, us-gaap:StatementBusinessSegments

bxp:UnconsolidatedJointVentures, us-gaap:IntersegmentElimination


Gross
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-13.336-24.938-27.9112824232425252216
Percentage of GrossProfit-3.3-5.9-6.96.15.35.15.45.75.85.54.0
Percentage of Revenues-2.0-3.6-4.33.83.23.13.43.53.63.32.4
Percentage of Revenues bxp:UnconsolidatedJointVentures us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GrossProfit dei:LegalEntity, us-gaap:StatementBusinessSegments, us-gaap:StatementEquityComponents

bxp:BostonPropertiesLimitedPartnership, us-gaap:IntersegmentElimination, bxp:Noncontrollinginterestpropertypartnerships


Gross
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-40.639-42.16-32.427-45.093-46.249-45.562
Percentage of GrossProfit-10.2-10.0-8.1-9.6-10.1-10.0
Percentage of Revenues-6.1-6.1-5.0-6.0-6.2-6.2
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:IntersegmentElimination bxp:Noncontrollinginterestpropertypartnerships0.00.00.00.00.00.0

us-gaap:GrossProfit dei:LegalEntity, us-gaap:StatementGeographical

bxp:UnconsolidatedJointVentures, bxp:Boston


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3.6242.2812.2752.7642.6273.0992.2181.6860.8180.7720.770.7810.781
Percentage of GrossProfit0.80.50.60.70.70.70.50.40.20.20.20.20.2
Percentage of Revenues0.50.30.30.40.40.40.30.20.10.10.10.10.1
Percentage of Revenues bxp:UnconsolidatedJointVentures bxp:Boston0.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:UnconsolidatedJointVentures, bxp:LosAngeles


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1214141115151514151515136.902
Percentage of GrossProfit2.73.23.82.83.73.43.33.23.43.53.63.21.7
Percentage of Revenues1.72.02.31.72.32.12.02.02.12.22.21.91.0
Percentage of Revenues bxp:UnconsolidatedJointVentures bxp:LosAngeles0.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:UnconsolidatedJointVentures, bxp:SanFrancisco


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3.583.483.5444.0984.1273.1590.00.00.00.00.00.00.0
Percentage of GrossProfit0.80.80.91.01.00.70.00.00.00.00.00.00.0
Percentage of Revenues0.50.50.50.60.60.40.00.00.00.00.00.00.0
Percentage of Revenues bxp:UnconsolidatedJointVentures bxp:SanFrancisco0.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:UnconsolidatedJointVentures, stpr:DC


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value5.7765.635-0.0455.5845.3165.8146.1766.7046.7477.083
Percentage of GrossProfit1.31.3-0.01.31.31.21.31.51.51.6
Percentage of Revenues0.80.8-0.00.80.80.80.80.90.91.0
Percentage of Revenues bxp:UnconsolidatedJointVentures stpr:DC0.00.00.00.00.00.00.00.00.00.0

bxp:UnconsolidatedJointVentures, stpr:NY


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.172-0.793-7.4360.5390.8150.7560.719-0.0271.6961.7861.5251.6981.706
Percentage of GrossProfit0.0-0.2-1.90.10.20.20.2-0.00.40.40.40.40.4
Percentage of Revenues0.0-0.1-1.10.10.10.10.1-0.00.20.20.20.20.3
Percentage of Revenues bxp:UnconsolidatedJointVentures stpr:NY0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GrossProfit us-gaap:ConsolidationItems, us-gaap:StatementEquityComponents

us-gaap:MaterialReconcilingItems, bxp:Noncontrollinginterestpropertypartnerships


Gross
Period End2021-06-302021-03-312020-06-302020-03-31
Value-46.287-44.376-32.427-47.661
Percentage of GrossProfit-10.2-10.0-8.1-10.1
Percentage of Revenues-6.5-6.2-5.0-6.3
Percentage of Revenues us-gaap:MaterialReconcilingItems bxp:Noncontrollinginterestpropertypartnerships0.00.00.00.0

us-gaap:GrossProfit us-gaap:Ownership

bxp:CompanysShare


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value432424371404397452447433433425409391379
Percentage of GrossProfit95.495.693.195.998.996.095.694.995.495.195.395.093.4
Percentage of Revenues60.659.555.858.360.860.259.058.359.158.758.057.057.2
Percentage of Revenues bxp:CompanysShare0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GrossProfit us-gaap:Ownership, us-gaap:StatementGeographical

bxp:CompanysShare, bxp:Boston


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value145142128134135152149141138131131130129
Percentage of GrossProfit32.232.232.332.033.532.332.030.930.629.530.731.631.8
Percentage of Revenues20.420.019.419.520.620.219.819.018.918.218.719.019.5
Percentage of Revenues bxp:CompanysShare bxp:Boston0.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:CompanysShare, bxp:LosAngeles


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1214141115151514151515136.902
Percentage of GrossProfit2.73.23.82.83.73.43.33.23.43.53.63.21.7
Percentage of Revenues1.72.02.31.72.32.12.02.02.12.22.21.91.0
Percentage of Revenues bxp:CompanysShare bxp:LosAngeles0.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:CompanysShare, bxp:SanFrancisco


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value87927790939794908782746862
Percentage of GrossProfit19.420.819.421.423.220.620.119.819.318.417.316.515.3
Percentage of Revenues12.313.011.613.014.212.912.412.212.011.410.69.99.4
Percentage of Revenues bxp:CompanysShare bxp:SanFrancisco0.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:CompanysShare, stpr:DC


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value62594957596769697069
Percentage of GrossProfit13.813.312.513.614.814.314.815.315.515.6
Percentage of Revenues8.78.37.58.39.19.09.19.49.69.6
Percentage of Revenues bxp:CompanysShare stpr:DC0.00.00.00.00.00.00.00.00.00.0

bxp:CompanysShare, stpr:NY


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1231159911094119118117120126114108109
Percentage of GrossProfit27.426.125.126.123.625.425.425.726.628.226.726.326.8
Percentage of Revenues17.416.215.015.914.515.915.715.816.517.416.215.816.4
Percentage of Revenues bxp:CompanysShare stpr:NY0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GrossProfit us-gaap:StatementBusinessSegments, us-gaap:StatementEquityComponents

us-gaap:IntersegmentElimination, bxp:Noncontrollinginterestpropertypartnerships


Gross
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-40.639-42.16-32.427-47.661-45.093-46.249-45.562-47.085-45.339-43.068-43.049
Percentage of GrossProfit-10.2-10.0-8.1-10.1-9.6-10.1-10.0-10.5-10.6-10.5-10.6
Percentage of Revenues-6.1-6.1-5.0-6.3-6.0-6.2-6.2-6.5-6.4-6.3-6.5
Percentage of Revenues us-gaap:IntersegmentElimination bxp:Noncontrollinginterestpropertypartnerships0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GrossProfit us-gaap:StatementEquityComponents

bxp:Noncontrollinginterestpropertypartnerships


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-46.287-44.376-40.639-42.16-32.427-47.661-45.093-46.249-45.562-47.085-45.339-43.068-43.049
Percentage of GrossProfit-10.2-10.0-10.2-10.0-8.1-10.1-9.6-10.1-10.0-10.5-10.6-10.5-10.6
Percentage of Revenues-6.5-6.2-6.1-6.1-5.0-6.3-6.0-6.2-6.2-6.5-6.4-6.3-6.5
Percentage of Revenues bxp:Noncontrollinginterestpropertypartnerships0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GrossProfit us-gaap:StatementGeographical

bxp:Boston


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value152150136142142159157149148140139137137
Percentage of GrossProfit33.733.934.433.835.533.933.732.832.631.432.633.533.7
Percentage of Revenues21.421.120.620.521.821.220.820.220.219.419.820.120.6
Percentage of Revenues bxp:Boston0.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:SanFrancisco


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value84887385899494908782746862
Percentage of GrossProfit18.620.018.520.422.220.020.119.819.318.517.416.515.3
Percentage of Revenues11.812.511.112.413.612.512.412.212.011.410.69.99.4
Percentage of Revenues bxp:SanFrancisco0.00.00.00.00.00.00.00.00.00.00.00.00.0

stpr:DC


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value56535051546162636362
Percentage of GrossProfit12.512.012.612.313.513.113.513.814.014.0
Percentage of Revenues7.97.57.57.58.38.28.38.58.78.6
Percentage of Revenues stpr:DC0.00.00.00.00.00.00.00.00.00.0

stpr:NY


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value159150137141115156152153154161149141142
Percentage of GrossProfit35.234.034.533.628.833.132.733.534.136.134.734.335.0
Percentage of Revenues22.321.120.720.417.720.720.220.621.122.321.120.621.4
Percentage of Revenues stpr:NY0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GrossProfit us-gaap:StatementGeographical, us-gaap:StatementEquityComponents

bxp:Boston, bxp:Noncontrollinginterestpropertypartnerships


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-10.576-10.224-10.382-10.228-10.576-10.663-10.326-10.379-10.031-9.373-8.983-8.332-8.418
Percentage of GrossProfit-2.3-2.3-2.6-2.4-2.6-2.3-2.2-2.3-2.2-2.1-2.1-2.0-2.1
Percentage of Revenues-1.5-1.4-1.6-1.5-1.6-1.4-1.4-1.4-1.4-1.3-1.3-1.2-1.3
Percentage of Revenues bxp:Boston bxp:Noncontrollinginterestpropertypartnerships0.00.00.00.00.00.00.00.00.00.00.00.00.0

stpr:NY, bxp:Noncontrollinginterestpropertypartnerships


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-35.711-34.152-30.257-31.932-21.851-36.998-34.767-35.87-35.531-37.264-36.142-34.723-34.751
Percentage of GrossProfit-7.9-7.7-7.6-7.6-5.4-7.8-7.4-7.9-7.8-8.3-8.4-8.4-8.5
Percentage of Revenues-5.0-4.8-4.5-4.6-3.3-4.9-4.6-4.8-4.8-5.1-5.1-5.1-5.2
Percentage of Revenues stpr:NY bxp:Noncontrollinginterestpropertypartnerships0.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


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
Value10610711111010710110210610210110095929091929595971041051051061081081081171131101131211221031001051059910310395959992979692
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.915.116.816.016.413.513.614.314.013.914.213.913.913.614.014.014.515.115.416.716.815.817.017.317.617.619.218.318.819.821.021.320.020.822.022.321.223.123.021.221.823.723.525.124.624.3

us-gaap:InterestExpense dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value106107111110107101102106102
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.915.116.816.016.413.513.614.314.0
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership14.915.10.016.016.413.50.014.314.0

bxp:UnconsolidatedJointVentures


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
Value252526252322222020202219141414139.4279.38.8448.48.3838.3898.1918.0197.9867.987.957.957.984-8.0128.0998.14840-56.23456565555-400.96157575759595958
Percentage of InterestExpense24.123.723.823.021.822.221.719.220.320.522.220.816.016.015.914.29.99.79.08.08.08.07.77.47.47.36.77.07.2-7.16.76.738.8-56.053.953.856.053.6-385.760.259.958.364.060.961.263.4
Percentage of Revenues3.63.64.03.73.63.03.02.82.82.93.22.92.22.22.22.01.41.51.41.31.31.31.31.31.31.31.31.31.4-1.41.41.47.8-11.611.912.011.912.4-88.612.813.113.815.015.315.015.4
Percentage of Revenues bxp:UnconsolidatedJointVentures28.129.30.029.026.024.20.027.025.925.00.026.125.825.50.023.616.917.00.017.121.822.30.021.020.420.20.018.920.8-21.10.021.540.1-41.50.041.635.839.80.038.439.339.70.038.139.238.6

us-gaap:InterestExpense dei:LegalEntity, us-gaap:ConsolidationItems

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value-106.319-107.902-107.142-101.591
Percentage of InterestExpense-100.0-100.0-100.0-100.0
Percentage of Revenues-14.9-15.1-16.4-13.5
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:InterestExpense dei:LegalEntity, us-gaap:StatementBusinessSegments

bxp:BostonPropertiesLimitedPartnership, us-gaap:IntersegmentElimination


Interest
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-111.991-110.993-107.142-102.88-106.471-102.357
Percentage of InterestExpense-100.0-100.0-100.0-100.0-100.0-100.0
Percentage of Revenues-16.8-16.0-16.4-13.6-14.3-14.0
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:IntersegmentElimination0.00.00.00.00.00.0

us-gaap:InterestExpense us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value-106.319-107.902-107.142-101.591
Percentage of InterestExpense-100.0-100.0-100.0-100.0
Percentage of Revenues-14.9-15.1-16.4-13.5
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:InterestExpense us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Interest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-111.991-110.993-107.142-101.591-102.88-106.471-102.357-101.009-100.378-95.366-92.204-90.22-91.772-92.032-95.143-95.534-97.896-104.641-105.003105106108108108117113110113121122103100105105991031059594
Percentage of InterestExpense-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0101.999.399.3
Percentage of Revenues-16.8-16.0-16.4-13.5-13.6-14.3-14.0-13.9-14.2-13.9-13.9-13.6-14.0-14.0-14.5-15.1-15.4-16.7-16.815.817.017.317.617.619.218.318.819.821.021.320.020.822.022.321.223.123.421.021.7
Percentage of Revenues us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value11110010922695001401101661001481211311781031191369914779991841371868217317413079568815545548655711864101706040-12.90357615253656744
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.614.11.613.341.166.518.614.822.813.921.117.719.827.015.818.220.815.823.112.715.927.722.129.613.328.128.421.113.49.915.427.188.39.913.712.325.214.422.415.613.89.8-3.314.915.613.914.217.517.311.8

us-gaap:NetIncomeLoss dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value12511412104304568161124188
Percentage of NetIncomeLoss112.7114.1122.9112.7113.2113.8114.7113.0112.8
Percentage of Revenues17.616.11.915.046.575.621.316.825.7
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership17.616.10.015.046.575.60.016.825.7

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value111917.68689266497140107164981481191281761031171339714776961811371847917117412776548815245247655711848
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.612.81.213.040.766.118.614.522.413.521.117.419.426.615.817.820.415.423.112.315.527.322.129.212.927.728.420.613.09.415.426.687.89.913.712.225.210.8

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value12510510101301566158122185
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic112.7115.4130.7113.1113.3113.8112.8113.3113.0
Percentage of Revenues17.614.81.514.746.175.321.016.425.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership17.614.80.014.746.175.30.016.425.3

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic dei:LegalEntity, us-gaap:ConsolidationItems

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value125105301566
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic112.7115.4113.3113.8
Percentage of Revenues17.614.846.175.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic dei:LegalEntity, us-gaap:StatementBusinessSegments

bxp:BostonPropertiesLimitedPartnership, us-gaap:IntersegmentElimination


Net
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value10101301158122185
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic130.7113.1113.3112.8113.3113.0
Percentage of Revenues1.514.746.121.016.425.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:IntersegmentElimination0.00.00.00.00.00.0

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value11191266497
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0
Percentage of Revenues15.612.840.766.1
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value7.6868926649714010716498148119128176103117133971477696181137184791711741277654
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.1100.0100.0100.0
Percentage of Revenues1.213.040.766.118.614.522.413.521.117.419.426.615.817.820.415.423.112.315.527.322.129.212.927.728.520.613.09.4
Percentage of Revenues us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value111918.08889266496140107164981481191281751031171339714776961811381837917017412776549215244847485711864101706040-12.714576152
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.612.81.213.040.766.018.614.522.413.521.117.419.426.615.917.820.315.423.112.315.527.322.129.212.927.628.520.613.09.416.126.587.19.910.112.325.214.422.415.613.89.8-3.214.915.613.9

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value12510510101301565158122185
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted112.7115.4129.8113.1113.3113.8112.8113.3113.0
Percentage of Revenues17.614.81.614.746.175.121.016.425.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership17.614.80.014.746.175.10.016.425.3

Operating Expenses

us-gaap:OperatingExpenses dei:LegalEntity

us-gaap:OperatingExpenses

bxp:UnconsolidatedJointVentures


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
Value36373737333533283030312922222323222221211616171515161615151515143242424239384044424245454241
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.25.25.75.45.14.74.43.94.14.24.44.33.43.53.53.53.43.53.53.52.62.52.72.52.62.62.72.52.62.72.72.66.38.88.89.08.38.79.09.99.710.311.511.810.911.0
Percentage of Revenues bxp:UnconsolidatedJointVentures40.342.60.042.837.638.00.038.037.636.80.038.840.140.50.041.739.640.30.044.442.644.20.041.640.441.20.037.040.240.70.039.432.631.20.031.125.228.00.029.729.229.40.029.428.327.6

Operating Income Loss

us-gaap:OperatingIncomeLoss us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:OperatingIncomeLoss

bxp:A153211SecondAvenue


Operating
Period End2021-06-30
Value-0.3
Percentage of OperatingIncomeLoss100.0
Percentage of Revenues0.0
Percentage of Revenues bxp:A153211SecondAvenue-37.5

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value2.335.4163.1812.7041.018-8.0544.222-0.587-2.76-0.962-2.7552.9911.6661.6661.6651.665-4.9161.486396.902-31.723-58.0198.376-29.52916-2.9060.6270.6280.6240.6290.6290.6290.6270.6280.6270.670.6480.6490.6490.649-0.075
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.30.80.50.40.2-1.10.6-0.1-0.4-0.1-0.40.40.30.30.30.3-0.70.26.21.1-5.1-8.71.3-4.72.6-0.50.10.10.10.10.10.10.10.10.10.10.10.10.10.1-0.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2.335.4163.1812.7041.018-8.0544.222-0.587-2.76
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.30.80.50.40.2-1.10.6-0.1-0.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership0.30.80.00.40.2-1.10.0-0.1-0.4

Preferred Stock Dividends Income Statement Impact

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:PreferredStockDividendsIncomeStatementImpact


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.02.562.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.7042.5892.5892.6182.6462.6472.6182.5892.6462.6472.6182.5892.6462.6472.6180.1460.00.00.00.0
Percentage of PreferredStockDividendsIncomeStatementImpact0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0
Percentage of Revenues0.00.40.40.40.40.30.30.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.50.50.50.50.00.00.00.00.0

us-gaap:PreferredStockDividendsIncomeStatementImpact dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.02.562.6252.6252.6252.6252.6252.6252.625
Percentage of PreferredStockDividendsIncomeStatementImpact0.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.40.40.40.40.30.30.40.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership0.00.40.00.40.40.30.00.40.4

us-gaap:PreferredStockDividendsIncomeStatementImpact dei:LegalEntity, us-gaap:ConsolidationItems

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


Preferred
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.0-2.56-2.625-2.625
Percentage of PreferredStockDividendsIncomeStatementImpact0.0-100.0-100.0-100.0
Percentage of Revenues0.0-0.4-0.4-0.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:PreferredStockDividendsIncomeStatementImpact us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Preferred
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.0-2.56-2.625-2.625
Percentage of PreferredStockDividendsIncomeStatementImpact0.0-100.0-100.0-100.0
Percentage of Revenues0.0-0.4-0.4-0.3
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:PreferredStockDividendsIncomeStatementImpact us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Preferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.625-2.704-2.589-2.5892.6182.6462.6472.6182.5892.6462.6472.6182.589
Percentage of PreferredStockDividendsIncomeStatementImpact-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.4-0.4-0.4-0.3-0.3-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.40.40.40.40.40.40.40.40.40.5
Percentage of Revenues us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1411282411829857717614120313118515016021613214716711516471117216166323100209211150956710617050657576613474115806948-12.756687262
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues19.818.03.717.045.676.723.219.027.718.126.321.924.232.720.222.525.418.325.911.418.832.526.751.316.333.834.524.416.311.818.529.798.312.012.014.028.516.525.517.816.011.5-3.317.618.416.5

us-gaap:ProfitLoss dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value14313126119303588177143205
Percentage of ProfitLoss101.2102.4107.0101.5101.8102.0101.0101.3101.2
Percentage of Revenues20.018.44.017.346.478.223.519.328.1
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership20.018.40.017.346.478.20.019.328.1

bxp:UnconsolidatedJointVentures


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-4.824-9.534-52.909-11.1396.8833.1840.4232.329393.05316-18.1994.9934.4886.4842.86109.0736.6546.8114.4223.5494.2695.456.3916.2065.8969.0635.8255.4664.606170.228-2.227-5.26-1.122182.947-5.96382.5355.595-13.3853.6698.3445.902
Percentage of ProfitLoss-3.4-7.4-212.4-9.42.30.60.21.619.22.39.0-12.13.12.14.91.96.17.94.09.53.81.62.61.76.33.02.86.06.18.14.310.30.0-3.8-9.2-1.713.64.0-5.247.73.611.6104.95.411.59.4
Percentage of Revenues-0.7-1.3-8.0-1.61.10.40.10.35.30.42.4-2.70.80.71.00.41.51.41.01.10.70.50.70.91.01.01.01.51.01.00.83.10.0-0.5-1.1-0.23.90.7-1.38.50.61.3-3.40.92.11.6
Percentage of Revenues bxp:UnconsolidatedJointVentures-5.3-10.90.0-12.77.73.40.03.148.73.70.0-23.98.77.90.05.218.116.60.013.911.59.40.014.316.315.70.021.615.214.40.046.10.2-1.60.0-0.811.72.10.025.51.73.80.02.45.53.9

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity, us-gaap:ConsolidationItems

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value-2.655-3.505-2.484-3.237
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0
Percentage of Revenues-0.4-0.5-0.4-0.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity, us-gaap:ConsolidationItems, us-gaap:ProductOrService

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems, us-gaap:ManagementService


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value-7.284-6.803-8.125-7.879
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax274.4194.1327.1243.4
Percentage of Revenues-1.0-1.0-1.2-1.0
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:MaterialReconcilingItems us-gaap:ManagementService0.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity, us-gaap:ProductOrService

bxp:BostonPropertiesLimitedPartnership, bxp:ParkingandOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value181615161324262526
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-688.6-483.30.00.0-561.4-757.00.00.00.0
Percentage of Revenues2.62.42.42.42.13.33.53.43.6
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership bxp:ParkingandOther0.00.00.00.00.00.00.00.00.0

bxp:BostonPropertiesLimitedPartnership, srt:Hotel


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1.5610.6320.4640.090.0996.825111314
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-58.8-18.00.00.0-4.0-210.80.00.00.0
Percentage of Revenues0.20.10.10.00.00.91.61.82.0
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership srt:Hotel0.00.00.00.00.00.00.00.00.0

bxp:BostonPropertiesLimitedPartnership, us-gaap:ManagementService


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value7.2846.8036.3567.2818.1257.87910109.986
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-274.4-194.10.00.0-327.1-243.40.00.00.0
Percentage of Revenues1.01.01.01.11.21.01.41.41.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:ManagementService0.00.00.00.00.00.00.00.00.0

bxp:BostonPropertiesLimitedPartnership, us-gaap:RealEstateOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2.6553.5053.0092.8962.4843.2372.1592.4292.403
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-100.0-100.00.00.0-100.0-100.00.00.00.0
Percentage of Revenues0.40.50.50.40.40.40.30.30.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:RealEstateOther0.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

bxp:BostonPropertiesLimitedPartnership, us-gaap:ManagementService, us-gaap:IntersegmentElimination


Revenue
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-6.356-7.281-8.125-10.473-10.303-9.986
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0327.10.00.00.0
Percentage of Revenues-1.0-1.1-1.2-1.4-1.4-1.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:ManagementService us-gaap:IntersegmentElimination0.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax dei:LegalEntity, us-gaap:StatementBusinessSegments

bxp:BostonPropertiesLimitedPartnership, us-gaap:IntersegmentElimination


Revenue
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-3.009-2.896-2.484-2.159-2.429-2.403
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0100.00.00.00.0
Percentage of Revenues-0.5-0.4-0.4-0.3-0.3-0.3
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership us-gaap:IntersegmentElimination0.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value-2.655-3.505-2.484-3.237
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0
Percentage of Revenues-0.4-0.5-0.4-0.4
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ConsolidationItems, us-gaap:ProductOrService

us-gaap:MaterialReconcilingItems, us-gaap:ManagementService


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value-7.284-6.803-8.125-7.879
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax274.4194.1327.1243.4
Percentage of Revenues-1.0-1.0-1.2-1.0
Percentage of Revenues us-gaap:MaterialReconcilingItems us-gaap:ManagementService0.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

bxp:ParkingandOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1816151613242625262427262626
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-688.6-483.30.00.0-561.4-757.00.00.00.00.00.00.00.00.0
Percentage of Revenues2.62.42.42.42.13.33.53.43.63.43.93.94.04.0
Percentage of Revenues bxp:ParkingandOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:Hotel


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.5610.6320.4640.090.0996.8251113148.9381113149.102
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-58.8-18.00.00.0-4.0-210.80.00.00.00.00.00.00.00.0
Percentage of Revenues0.20.10.10.00.00.91.61.82.01.21.72.02.21.4
Percentage of Revenues srt:Hotel0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ManagementService


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7.2846.8036.3567.2818.1257.87910109.9863.39512159.3052.885
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-274.4-194.10.00.0-327.1-243.40.00.00.00.00.00.00.00.0
Percentage of Revenues1.01.01.01.11.21.01.41.41.40.51.72.21.40.4
Percentage of Revenues us-gaap:ManagementService0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RealEstateOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2.6553.5053.0092.8962.4843.2372.1592.4292.4033.3952.2192.5161.97
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-100.0-100.00.00.0-100.0-100.00.00.00.00.00.00.00.0
Percentage of Revenues0.40.50.50.40.40.40.30.30.30.50.30.40.3
Percentage of Revenues us-gaap:RealEstateOther0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:ManagementService, us-gaap:IntersegmentElimination


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-6.356-7.281-8.125-7.879-10.473-10.303-9.986-9.277-12.195-15.253-9.305
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0327.1243.40.00.00.00.00.00.00.0
Percentage of Revenues-1.0-1.1-1.2-1.0-1.4-1.4-1.4-1.3-1.7-2.2-1.4
Percentage of Revenues us-gaap:ManagementService us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementGeographical

srt:Hotel, bxp:Boston


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.5610.6320.4640.090.0996.8251113148.938111314
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-58.8-18.00.00.0-4.0-210.80.00.00.00.00.00.00.0
Percentage of Revenues0.20.10.10.00.00.91.61.82.01.21.72.02.2
Percentage of Revenues srt:Hotel bxp:Boston0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3.009-2.896-2.484-3.237-2.159-2.429-2.403-3.395-2.219-2.516-1.97-2.885
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0100.0100.00.00.00.00.00.00.00.00.0
Percentage of Revenues-0.5-0.4-0.4-0.4-0.3-0.3-0.3-0.5-0.3-0.4-0.3-0.4
Percentage of Revenues us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value713713665693654752757743733725705686664661655657656632636625623665624629618618613618589574576574515483478470471447452452436417392386393378376375389377
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Revenuesdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value713713665693654752757743733
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:UnconsolidatedJointVentures


Revenuesdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value918749878993837580828276575656555554524938373838393939413838383799135133135156139148150144145150155151150
Percentage of Revenues12.812.27.412.713.712.411.110.210.911.411.711.18.68.58.68.48.58.78.27.86.25.76.26.16.36.46.56.86.56.66.66.619.428.127.828.933.131.132.833.233.234.938.440.138.439.9
Percentage of Revenues12.812.27.412.713.712.411.110.210.911.411.711.18.68.58.68.48.58.78.27.86.25.76.26.16.36.46.56.86.56.66.66.619.428.127.828.933.131.132.833.233.234.938.440.138.439.9
Percentage of Revenues bxp:UnconsolidatedJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:A153211SecondAvenue


Revenuesus-gaap:
Period End2021-06-30
Value0.8
Percentage of Revenues0.1
Percentage of Revenues0.0
Percentage of Revenues bxp:A153211SecondAvenue100.0

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
Value2205922213228582295923000218292128421288212682050120256201371996119583193721930819281189661885118789189631917518379189801911319179198861887518898189792016219519194621562315462151411528014212147821398013884138351334812348
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

us-gaap:Assets dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Assetsdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value217922194522586226862272520993
Percentage of Assets98.898.898.898.898.898.6
Percentage of Assets98.898.898.898.898.898.6
Percentage of Assets bxp:BostonPropertiesLimitedPartnership100.0100.0100.0100.0100.0100.0

bxp:UnconsolidatedJointVentures


Assetsdei:
Period End2021-06-302021-03-312020-12-312019-12-31
Value5273521752394407
Percentage of Assets23.923.522.920.7
Percentage of Assets23.923.522.920.7
Percentage of Assets bxp:UnconsolidatedJointVentures100.0100.0100.0100.0

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
Value13960140841451114458144471340213262132851324712331120421193111747113991126911208112081104410919109301106511246104921091711019110731187811721117621182512967126111256996089619934595238641931385408492849083287223
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 Assets63.363.463.563.062.861.462.362.462.360.159.559.358.958.258.258.158.158.257.958.258.458.657.157.557.757.759.762.162.262.364.364.664.661.562.261.762.360.863.061.161.261.462.458.5

us-gaap:Liabilities dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Liabilitiesdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value139601408414511144581444713262
Percentage of Liabilities100.0100.0100.0100.0100.0100.0
Percentage of Assets63.363.463.563.062.862.3
Percentage of Assets bxp:BostonPropertiesLimitedPartnership64.164.264.263.763.663.2

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
Value2205922213228582295923000218292128421288212682050120256201371996119583193721930819281189661885118789189631917518379189801911319179198861887518898189792016219519194621562315462151411528014212147821398013884138351334812348
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

bxp:BostonPropertiesLimitedPartnership


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value217922194522586226862272520993
Percentage of LiabilitiesAndStockholdersEquity98.898.898.898.898.898.6
Percentage of Assets98.898.898.898.898.898.6
Percentage of Assets bxp:BostonPropertiesLimitedPartnership100.0100.0100.0100.0100.0100.0

bxp:UnconsolidatedJointVentures


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value527352175239521250635047440742804067419440893999233522202136209019141851181617551361126613281289128212601298119711861079108710851111512851685162519551955210567157355778
Percentage of LiabilitiesAndStockholdersEquity23.923.522.922.722.023.120.720.119.120.520.219.911.711.311.010.89.99.89.69.37.26.67.26.86.76.66.56.36.35.75.45.65.732.833.434.134.036.635.240.641.343.3
Percentage of Assets23.923.522.922.722.023.120.720.119.120.520.219.911.711.311.010.89.99.89.69.37.26.67.26.86.76.66.56.36.35.75.45.65.732.833.434.134.036.635.240.641.343.3
Percentage of Assets bxp:UnconsolidatedJointVentures100.0100.0100.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity

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
Value57495775599661296182604756845671571558365883587658925879581358255814577557865725573257495709585157825782569757255691570257415683562452565097511951344963486548254757469643724446
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 Assets26.126.026.226.726.927.726.726.626.928.529.029.229.530.030.030.230.230.530.730.530.230.031.130.830.330.128.630.330.130.028.529.128.933.633.033.833.634.932.934.534.333.932.836.0

us-gaap:StockholdersEquity dei:LegalEntity

bxp:UnconsolidatedJointVentures


Stockholders
Period End2021-06-302021-03-312020-12-312019-12-31
Value1957195519511438
Percentage of StockholdersEquity34.033.932.525.3
Percentage of Assets8.98.88.56.8
Percentage of Assets bxp:UnconsolidatedJointVentures37.137.537.232.6

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
Value5576971668171416916606447511087360543322472294434493492302356419118016057231387134210641763846103611792365164116089091041122316715911823106378074747812701703122014482411506
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 Assets2.53.17.37.57.43.03.03.55.11.82.71.62.41.52.22.62.61.61.92.26.28.43.97.37.05.58.94.55.56.211.78.48.35.86.78.110.94.212.37.65.65.43.60.00.00.011.70.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-31
Value5576971668171416916606447511087543434
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.53.17.37.57.43.03.03.55.12.72.2
Percentage of Assets bxp:BostonPropertiesLimitedPartnership2.63.27.47.67.40.03.10.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue dei:LegalEntity, us-gaap:ConsolidatedEntities

bxp:BostonPropertiesLimitedPartnership, us-gaap:VariableInterestEntityPrimaryBeneficiary


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value335289340267300280
Percentage of CashAndCashEquivalentsAtCarryingValue60.341.520.415.617.843.4
Percentage of Assets1.51.31.51.21.31.3
Percentage of Assets bxp:BostonPropertiesLimitedPartnership us-gaap:VariableInterestEntityPrimaryBeneficiary0.00.00.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value335289340267300280
Percentage of CashAndCashEquivalentsAtCarryingValue60.341.520.415.617.843.4
Percentage of Assets1.51.31.51.21.31.3
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary0.00.00.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:Ownership, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:SubsequentEventType

bxp:CompanysShare, bxp:SafecoPlaza, us-gaap:SubsequentEvent


Cash
Period End2021-07-20
Value26
Percentage of CashAndCashEquivalentsAtCarryingValue0.0
Percentage of Assets0.0
Percentage of Assets bxp:CompanysShare bxp:SafecoPlaza us-gaap:SubsequentEvent0.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:SafecoPlaza


Cash
Period End2021-06-29
Value46
Percentage of CashAndCashEquivalentsAtCarryingValue0.0
Percentage of Assets0.0
Percentage of Assets bxp:SafecoPlaza0.0

bxp:ShadyGroveBioTechCampus


Cash
Period End2021-06-07
Value10.0
Percentage of CashAndCashEquivalentsAtCarryingValue0.0
Percentage of Assets0.0
Percentage of Assets bxp:ShadyGroveBioTechCampus0.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:SubsequentEventType

bxp:SafecoPlaza, us-gaap:SubsequentEvent


Cash
Period End2021-07-20
Value51
Percentage of CashAndCashEquivalentsAtCarryingValue0.0
Percentage of Assets0.0
Percentage of Assets bxp:SafecoPlaza us-gaap:SubsequentEvent0.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value6379491719176419918586918041162432639423727455505576539354420797
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.94.37.57.78.73.93.33.85.52.13.22.13.62.32.63.02.81.92.24.3

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-31
Value6379491719176419918586918041162639505
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.94.37.57.78.73.93.33.85.53.22.6
Percentage of Assets bxp:BostonPropertiesLimitedPartnership2.94.37.67.88.80.03.30.00.00.00.0

Land

us-gaap:Land

us-gaap:Land


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value503850685069506950705070511150875056506150725108510851055080488048804879487948794806478544502605235622161983
Percentage of Land100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.822.822.222.122.023.224.023.923.824.725.025.425.626.126.225.325.325.725.926.026.124.122.116.815.916.616.1

us-gaap:Land dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Landdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value494249714971497149725011
Percentage of Land98.198.198.198.198.198.0
Percentage of Assets22.422.421.821.721.623.5
Percentage of Assets bxp:BostonPropertiesLimitedPartnership22.722.722.021.921.923.9

Furniture And Fixtures Gross

us-gaap:FurnitureAndFixturesGross

us-gaap:FurnitureAndFixturesGross


Furniture
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value515149494444444444434444444137373736323129272523262423
Percentage of FurnitureAndFixturesGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.10.10.20.20.20.2

us-gaap:FurnitureAndFixturesGross dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Furniture
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value515149494444
Percentage of FurnitureAndFixturesGross100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.2
Percentage of Assets bxp:BostonPropertiesLimitedPartnership0.20.20.20.20.20.2

Leasehold Improvements Gross

us-gaap:LeaseholdImprovementsGross

us-gaap:LeaseholdImprovementsGross


Leasehold
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value28392816275226872664264126562559248624442396232222782266221921862136211120602001192017521617143512621090922
Percentage of LeaseholdImprovementsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.912.712.011.711.612.112.512.011.711.911.811.511.411.611.511.311.111.110.910.710.48.88.09.38.58.27.5

us-gaap:LeaseholdImprovementsGross dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Leasehold
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value283928162752268726642656
Percentage of LeaseholdImprovementsGross100.0100.0100.0100.0100.0100.0
Percentage of Assets12.912.712.011.711.612.5
Percentage of Assets bxp:BostonPropertiesLimitedPartnership13.012.812.211.811.712.7

Construction In Progress Gross

us-gaap:ConstructionInProgressGross

us-gaap:ConstructionInProgressGross


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9087948687698938047899538126475781057116312621269138613481211103795486585776372588079773671513091564152315021483114510369377328708188999826811073563
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.13.63.83.43.93.73.74.53.83.22.95.35.86.46.67.27.06.45.55.14.64.54.23.84.64.23.73.86.98.27.67.77.67.36.76.24.86.15.56.47.14.98.04.6

us-gaap:ConstructionInProgressGross dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value908794868769893789
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0
Percentage of Assets4.13.63.83.43.93.7
Percentage of Assets bxp:BostonPropertiesLimitedPartnership4.23.63.83.43.93.8

us-gaap:ConstructionInProgressGross dei:LegalEntity, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:BostonPropertiesLimitedPartnership, bxp:Development, bxp:RestonNext


Construction
Period End2020-12-31
Value354
Percentage of ConstructionInProgressGross40.8
Percentage of Assets1.5
Percentage of Assets bxp:BostonPropertiesLimitedPartnership bxp:Development bxp:RestonNext0.0

bxp:BostonPropertiesLimitedPartnership, bxp:Development, bxp:ThreeTwoFiveMainStreet


Construction
Period End2020-12-31
Value160
Percentage of ConstructionInProgressGross18.5
Percentage of Assets0.7
Percentage of Assets bxp:BostonPropertiesLimitedPartnership bxp:Development bxp:ThreeTwoFiveMainStreet0.0

bxp:BostonPropertiesLimitedPartnership, bxp:Development, bxp:TwoOneZeroZeroPennsylvaniaAvenue


Construction
Period End2020-12-31
Value109
Percentage of ConstructionInProgressGross12.6
Percentage of Assets0.5
Percentage of Assets bxp:BostonPropertiesLimitedPartnership bxp:Development bxp:TwoOneZeroZeroPennsylvaniaAvenue0.0

bxp:BostonPropertiesLimitedPartnership, srt:OfficeBuilding, bxp:SixZeroOneLexingtonAvenue


Construction
Period End2020-12-31
Value229
Percentage of ConstructionInProgressGross26.5
Percentage of Assets1.0
Percentage of Assets bxp:BostonPropertiesLimitedPartnership srt:OfficeBuilding bxp:SixZeroOneLexingtonAvenue0.0

bxp:BostonPropertiesLimitedPartnership, srt:OfficeBuilding, bxp:TwoZeroZeroWestStreet


Construction
Period End2020-12-31
Value14
Percentage of ConstructionInProgressGross1.7
Percentage of Assets0.1
Percentage of Assets bxp:BostonPropertiesLimitedPartnership srt:OfficeBuilding bxp:TwoZeroZeroWestStreet0.0

us-gaap:ConstructionInProgressGross us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:Development, bxp:RestonNext


Construction
Period End2020-12-31
Value354
Percentage of ConstructionInProgressGross40.8
Percentage of Assets1.5
Percentage of Assets bxp:Development bxp:RestonNext0.0

bxp:Development, bxp:ThreeTwoFiveMainStreet


Construction
Period End2020-12-31
Value160
Percentage of ConstructionInProgressGross18.5
Percentage of Assets0.7
Percentage of Assets bxp:Development bxp:ThreeTwoFiveMainStreet0.0

bxp:Development, bxp:TwoOneZeroZeroPennsylvaniaAvenue


Construction
Period End2020-12-31
Value109
Percentage of ConstructionInProgressGross12.6
Percentage of Assets0.5
Percentage of Assets bxp:Development bxp:TwoOneZeroZeroPennsylvaniaAvenue0.0

srt:OfficeBuilding, bxp:SixZeroOneLexingtonAvenue


Construction
Period End2020-12-31
Value229
Percentage of ConstructionInProgressGross26.5
Percentage of Assets1.0
Percentage of Assets srt:OfficeBuilding bxp:SixZeroOneLexingtonAvenue0.0

srt:OfficeBuilding, bxp:TwoZeroZeroWestStreet


Construction
Period End2020-12-31
Value14
Percentage of ConstructionInProgressGross1.7
Percentage of Assets0.1
Percentage of Assets srt:OfficeBuilding bxp:TwoZeroZeroWestStreet0.0

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
Value130513071310137713391377955933936976956925682666619611819793775775252235235217209196193180176127126129137652659664670667669770772762767763
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 Assets5.95.95.76.05.86.34.54.44.44.84.74.63.43.43.23.24.24.24.14.11.31.21.31.11.11.01.01.00.90.70.60.70.74.24.34.44.44.74.55.55.65.55.76.2

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value13051307131013771339955
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0
Percentage of Assets5.95.95.76.05.84.5
Percentage of Assets bxp:BostonPropertiesLimitedPartnership6.06.05.86.15.94.6

bxp:UnconsolidatedJointVentures


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
Value127012721273134713101355933910913952931901657641593588798772753752228211210192184173182180176127126129137652659664670667669770772762767763
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures97.397.397.297.997.898.497.797.597.597.597.497.496.496.295.896.397.597.397.297.190.589.689.388.587.988.494.1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.85.75.65.95.76.24.44.34.34.64.64.53.33.33.13.14.14.14.04.01.21.11.11.01.00.90.91.00.90.70.60.70.74.24.34.44.44.74.55.55.65.55.76.2
Percentage of Assets bxp:UnconsolidatedJointVentures24.124.424.30.00.00.021.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

bxp:AnnapolisJunctionNfmLlc


Investments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value13131225252525252517171718181919202121212927262525242317
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures1.01.01.01.82.72.72.72.62.61.92.62.73.03.12.42.52.62.78.59.012.312.812.813.213.113.613.413.8
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.10.10.10.10.10.10.1
Percentage of Assets bxp:AnnapolisJunctionNfmLlc0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:BNYAAmenityOperatorLLC


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1.2971.6721.8460.2360.00.00.0
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures0.10.10.10.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets bxp:BNYAAmenityOperatorLLC0.00.00.00.00.00.00.0

bxp:BNYTowerHoldingsLLC


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value2827299896959494918382727171726755433325181211109.228
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures2.22.12.37.27.26.99.910.19.78.58.67.810.510.711.611.16.85.54.33.37.35.24.94.74.4
Percentage of Assets0.10.10.10.40.40.40.40.40.40.40.40.40.40.40.40.40.30.20.20.10.10.10.10.10.0
Percentage of Assets bxp:BNYTowerHoldingsLLC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:CAColoradoCenterLimitedPartnership


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
Value229229227232236251252250254252253253253254254263514512510507
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures17.617.517.416.817.618.226.426.827.125.926.527.437.238.141.043.162.864.665.965.4
Percentage of Assets1.01.01.01.01.01.21.21.21.21.21.31.31.31.31.31.42.72.72.72.7
Percentage of Assets bxp:CAColoradoCenterLimitedPartnership0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:FiveFourZeroMadisonVentureLlc


Investments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.1220.1050.2012.9612.9533.0759.2666666666666676867676968676869686768706969
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures0.00.00.00.20.30.31.06.86.97.29.79.910.711.08.38.58.79.027.228.729.331.932.734.635.239.139.454.2
Percentage of Assets0.00.00.00.00.00.00.00.30.30.30.30.30.30.30.40.40.40.40.40.40.40.40.40.40.30.40.40.4
Percentage of Assets bxp:FiveFourZeroMadisonVentureLlc0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:FivezerooneKStreetLLC


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value424242424242424242424242424242424242424242424241
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures3.33.33.23.13.23.14.44.64.54.44.54.66.26.46.96.95.25.35.55.516.818.018.121.6
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.2
Percentage of Assets bxp:FivezerooneKStreetLLC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:GatewayCommonsComplex


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value331332336339345348
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures25.425.425.724.625.825.3
Percentage of Assets1.51.51.51.51.51.6
Percentage of Assets bxp:GatewayCommonsComplex0.00.00.00.00.00.0

bxp:HotelTowerDeveloperLLC


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value11111010109.8899.8833.9173.6263.3433.0222.7382.0461.7511.691.5961.5611.1670.933
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures0.90.80.80.80.80.71.00.40.40.30.30.30.30.30.30.30.20.10.1
Percentage of Assets0.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets bxp:HotelTowerDeveloperLLC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:OneHundredCausewayStreet


Investments
Period End2021-06-302020-12-31
Value5656
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures4.34.3
Percentage of Assets0.30.2
Percentage of Assets bxp:OneHundredCausewayStreet0.00.0

bxp:OneTwoSixFiveMainOfficeJVLLC


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value3.7573.8993.7874.0274.1163.6363.783.9324.1254.033.9184.3134.4134.5394.6414.6864.6544.8664.779232116114.1822.209
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures0.30.30.30.30.30.30.40.40.40.40.40.50.60.70.70.80.60.60.63.18.66.85.11.91.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.00.0
Percentage of Assets bxp:OneTwoSixFiveMainOfficeJVLLC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:OnehundredCausewayStreet


Investments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value56565656575674694623120.0
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures4.34.34.14.24.15.97.97.44.82.51.30.0
Percentage of Assets0.30.20.20.20.30.30.30.30.20.10.10.0
Percentage of Assets bxp:OnehundredCausewayStreet0.00.00.00.00.00.00.00.00.00.00.00.0

bxp:PlatformSixteen


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value108108108104999329290.0
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures8.38.38.37.67.46.83.13.10.0
Percentage of Assets0.50.50.50.50.40.40.10.10.0
Percentage of Assets bxp:PlatformSixteen0.00.00.00.00.00.00.00.00.0

bxp:PodiumDeveloperLLC


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value49484849494949415869696872676755453629332723189.5416.6095.5764.231
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures3.83.73.73.63.73.65.24.46.37.27.27.410.710.210.89.15.64.63.94.411.010.17.94.43.12.82.2
Percentage of Assets0.20.20.20.20.20.20.20.20.30.30.30.30.40.30.30.30.20.20.20.20.10.10.10.10.00.00.0
Percentage of Assets bxp:PodiumDeveloperLLC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:ResidentialTowerDeveloperLLC


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value48495052535455484847474638292825232120
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures3.73.83.93.84.04.05.85.25.14.95.05.05.74.54.64.22.92.72.7
Percentage of Assets0.20.20.20.20.20.20.30.20.20.20.20.20.20.20.10.10.10.10.1
Percentage of Assets bxp:ResidentialTowerDeveloperLLC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:RosecransSepulvedaPartnersFourLLC


Investments
Period End2021-06-302021-03-312020-12-312020-09-30
Value27272727
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures2.12.12.12.0
Percentage of Assets0.10.10.10.1
Percentage of Assets bxp:RosecransSepulvedaPartnersFourLLC0.00.00.00.0

bxp:SantaMonicaBusinessPark


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1571591451471481511631631691751801830.0
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures12.112.211.110.711.111.017.217.618.018.018.919.80.0
Percentage of Assets0.70.70.60.60.60.70.80.80.80.90.90.90.0
Percentage of Assets bxp:SantaMonicaBusinessPark0.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:SevensevenfivezeroWisconsinAvenueLLC


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value595858575757566921
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures4.54.54.44.24.34.15.97.33.5
Percentage of Assets0.30.30.30.30.20.30.30.30.1
Percentage of Assets bxp:SevensevenfivezeroWisconsinAvenueLLC0.00.00.00.00.00.00.00.00.0

bxp:ThreeHudsonBoulevard


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value11611511310691846754474746460.0
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures8.98.98.77.76.86.17.15.85.14.94.95.00.0
Percentage of Assets0.50.50.50.50.40.40.30.30.20.20.20.20.0
Percentage of Assets bxp:ThreeHudsonBoulevard0.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:WpProjectDeveloperLlc


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value343435353636363737373838393939404041414242434344444545464646
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures2.62.72.72.62.72.63.84.04.03.94.04.25.75.96.46.65.05.25.45.416.818.318.520.321.223.123.525.526.336.9
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.2
Percentage of Assets bxp:WpProjectDeveloperLlc0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1701441461461471481481491491510.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.80.60.60.60.60.70.70.70.70.70.0

us-gaap:OperatingLeaseRightOfUseAsset dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value170144146146147148
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.60.60.60.60.7
Percentage of Assets bxp:BostonPropertiesLimitedPartnership0.80.70.60.60.60.7

bxp:UnconsolidatedJointVentures


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value22222211111112
Percentage of OperatingLeaseRightOfUseAsset12.915.415.47.87.98.08.1
Percentage of Assets0.10.10.10.10.10.10.1
Percentage of Assets bxp:UnconsolidatedJointVentures0.40.40.40.00.00.00.3

us-gaap:OperatingLeaseRightOfUseAsset dei:LegalEntity, us-gaap:PropertyPlantAndEquipmentByType

bxp:BostonPropertiesLimitedPartnership, us-gaap:LandAndLandImprovements


Operating
Period End2020-12-31
Value148
Percentage of OperatingLeaseRightOfUseAsset101.5
Percentage of Assets0.7
Percentage of Assets bxp:BostonPropertiesLimitedPartnership us-gaap:LandAndLandImprovements0.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:PropertyPlantAndEquipmentByType

us-gaap:LandAndLandImprovements


Operating
Period End2020-12-31
Value146
Percentage of OperatingLeaseRightOfUseAsset100.0
Percentage of Assets0.6
Percentage of Assets us-gaap:LandAndLandImprovements0.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:SumnerSquare


Operating
Period End2021-05-19
Value27
Percentage of OperatingLeaseRightOfUseAsset0.0
Percentage of Assets0.0
Percentage of Assets bxp:SumnerSquare0.0

Other Assets

us-gaap:OtherAssets dei:LegalEntity

us-gaap:OtherAssets

bxp:UnconsolidatedJointVentures


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
Value521505531560535578502498515534543523397376367374315297297294237225256240243224264182175158163158162645673657675658668680734745749760
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 Assets2.42.32.32.42.32.62.42.32.42.62.72.62.01.91.91.91.61.61.61.61.31.21.41.31.31.21.31.00.90.80.80.80.84.14.44.34.44.64.54.95.35.45.66.2
Percentage of Assets bxp:UnconsolidatedJointVentures9.99.710.10.00.00.011.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2931294929953013203133584170425830633099
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.813.914.815.610.818.321.021.119.821.0

us-gaap:LongTermDebt us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value125361253613047130481304812061118111183811846110051100710889107211033910271102341023697069616962897549980903697299867988699061047510558105771134111354113658912
Percentage of LongTermDebt0.00.0445.00.00.00.0400.50.00.00.0367.50.00.00.0340.80.00.00.0473.30.00.00.0269.10.00.00.0237.50.00.00.0266.30.00.0290.9
Percentage of Assets56.856.457.156.856.755.355.555.655.753.754.354.153.752.853.053.053.151.251.051.251.452.049.251.351.651.549.855.555.955.756.358.258.457.6
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1343813242142651417514174122541231112402122591103310874107451062610334105491058210572994898281018210373104889357101511031010484104011094311087110331165711737117769697
Percentage of LongTermDebt0.00.0486.50.00.00.0417.50.00.00.0363.00.00.00.0350.00.00.00.0483.80.00.00.0278.60.00.00.0249.40.00.00.0273.70.00.0316.5
Percentage of Assets60.959.662.461.761.656.157.858.357.653.853.753.453.252.854.554.854.852.552.154.254.754.750.953.553.954.752.358.058.758.157.860.160.562.7
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value18
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.1

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:SumnerSquare


Lessee
Period End2021-05-19
Value0.784
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo0.0
Percentage of Assets0.0
Percentage of Assets bxp:SumnerSquare0.0

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value10
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:SumnerSquare


Lessee
Period End2021-05-19
Value0.808
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree0.0
Percentage of Assets0.0
Percentage of Assets bxp:SumnerSquare0.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value9277000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:SumnerSquare


Lessee
Period End2021-05-19
Value832000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour0.0
Percentage of Assets0.0
Percentage of Assets bxp:SumnerSquare0.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value9476000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:SumnerSquare


Lessee
Period End2021-05-19
Value422000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive0.0
Percentage of Assets0.0
Percentage of Assets bxp:SumnerSquare0.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2262002012012002002001991991990.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.00.90.90.90.90.90.90.90.91.00.0

us-gaap:OperatingLeaseLiability dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value226200201201200200
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets1.00.90.90.90.90.9
Percentage of Assets bxp:BostonPropertiesLimitedPartnership1.00.90.90.90.91.0

bxp:UnconsolidatedJointVentures


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value29292917171717
Percentage of OperatingLeaseLiability13.014.614.48.78.78.78.6
Percentage of Assets0.10.10.10.10.10.10.1
Percentage of Assets bxp:UnconsolidatedJointVentures0.60.60.60.00.00.00.4

us-gaap:OperatingLeaseLiability us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:SumnerSquare


Operating
Period End2021-05-19
Value26
Percentage of OperatingLeaseLiability0.0
Percentage of Assets0.0
Percentage of Assets bxp:SumnerSquare0.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value620
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets2.7

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:SumnerSquare


Lessee
Period End2021-05-19
Value27
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue0.0
Percentage of Assets0.0
Percentage of Assets bxp:SumnerSquare0.0

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value-418890000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets-1.8

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:SumnerSquare


Lessee
Period End2021-05-19
Value-536000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount0.0
Percentage of Assets0.0
Percentage of Assets bxp:SumnerSquare0.0

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
Value57495775599661296182604756845671571558365883587658925879581358255814577557865725573257495709585157825782569757255691570257415683562452565097511951344963486548254757469643724446
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 Assets26.126.026.226.726.927.726.726.626.928.529.029.229.530.030.030.230.230.530.730.530.230.031.130.830.330.128.630.330.130.028.529.128.933.633.033.833.634.932.934.534.333.932.836.0

us-gaap:StockholdersEquity dei:LegalEntity

bxp:UnconsolidatedJointVentures


Stockholders
Period End2021-06-302021-03-312020-12-312019-12-31
Value1957195519511438
Percentage of StockholdersEquity34.033.932.525.3
Percentage of Assets8.98.88.56.8
Percentage of Assets bxp:UnconsolidatedJointVentures37.137.537.232.6

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value8089812183398495854784208014799580208170821382058213818481028099807379227931785978987929788680627988799879027047701370027043674166845805563456855705551954135384533652894964507850685065506942594383
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.736.636.537.037.238.637.737.637.739.940.540.741.141.841.841.941.941.842.141.841.641.442.942.541.841.739.737.337.136.934.934.534.337.236.437.537.338.836.638.538.438.237.20.00.00.041.00.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value581560736425681566915254
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest71.974.877.080.278.365.6
Percentage of Assets26.427.328.129.729.124.7
Percentage of Assets bxp:BostonPropertiesLimitedPartnership26.727.728.430.029.425.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

bxp:Noncontrollinginterestpropertypartnerships


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1725172517261730172417361728172016961710171117111699168516831530
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest21.321.220.720.420.220.621.621.521.120.920.820.920.720.620.819.3
Percentage of Assets7.87.87.67.57.58.08.18.18.08.38.48.58.58.68.78.1
Percentage of Assets bxp:Noncontrollinginterestpropertypartnerships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value-43.166-45.139-49.89-52.622-54.921-55.7-48.335-51.996-51.34-48.734-47.741-45.137-47.695-49.062-50.429-51.796-53.161-50.983-52.251-73.943-79.748-56.706-14.114-20.6251.848-11.907-9.304-9.866-10.429-10.989-11.556-12.122-12.689-13.253-13.817-14.379-14.978-15.558-16.138-16.717-17.294-17.867-18.436-19.53-20.155-21.145-21.777-24.291-23.671
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.5-0.6-0.6-0.6-0.6-0.7-0.6-0.7-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.7-0.6-0.7-0.9-1.0-0.7-0.2-0.30.0-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.4-0.6-0.5
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.3-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.3-0.1-0.10.0-0.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.10.00.00.0-0.20.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value6405639263566348634063216294627462786414640764006391638463776370636363396333632663166306630563006293628662705684567956685662525052465232522251945184505049364916484647714417442443944381437335593416
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest79.278.776.274.774.275.178.578.578.378.578.078.077.878.078.778.778.880.079.880.580.079.580.078.178.878.679.380.781.080.980.477.978.590.192.791.490.991.591.291.390.890.289.087.186.786.586.383.677.9
Percentage of Assets29.028.827.827.627.629.029.629.529.531.331.631.832.032.632.933.033.033.433.633.733.332.934.333.232.932.831.530.130.129.928.126.927.033.533.834.333.935.533.435.234.934.533.10.00.00.035.40.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value1.5611.5611.5571.5561.5561.5531.5481.5461.5461.5451.5451.5441.5441.5441.5431.5431.5431.5381.5381.5381.5371.5361.5361.5361.5351.5341.5311.5311.5311.531.531.5241.5241.5161.5161.5091.5071.4941.4811.4761.4641.4511.4021.4011.3931.391.3891.2121.195
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value61562061663464063660060360862323302329232023052288227422582146214521332165218021772210220522162205132213221300130210581059548537566571556547558578593591616625628623570615
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest7.67.67.47.57.57.67.57.67.67.628.428.428.328.228.228.128.027.127.127.127.427.527.627.427.627.727.918.818.918.618.515.715.99.49.510.010.010.110.110.410.811.211.912.112.312.412.313.414.0
Percentage of Assets2.82.82.72.82.82.92.82.82.93.011.511.611.611.811.811.811.711.311.411.411.411.411.811.611.511.611.17.07.06.96.55.45.43.53.53.73.73.93.74.04.24.34.40.00.00.05.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock


Stockholders
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value2002002002002002002002002002002002002002002002002002002002002002002002002002002002002002002002000.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest2.42.42.32.42.52.52.52.42.42.42.42.42.52.52.52.52.52.52.52.52.52.52.52.52.52.82.92.92.83.03.03.40.0
Percentage of Assets0.90.90.90.90.90.90.91.01.01.01.01.01.01.01.01.11.11.11.11.01.11.11.01.01.01.11.11.11.01.01.01.30.0
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value-612.247-570.982-509.653-364.72-302.511-416.74-760.523-749.666-710.592-728.083-675.534-677.312-649.747-654.879-712.343-692.739-694.32-712.27-693.694-725.522-702.361-699.048-780.952-627.054-711.239-690.993-762.464-148.566-176.929-153.979-108.552246192-160.697-109.985-59.621-34.463-70.609-53.08-72.941-69.537-56.479-24.76358707895154376
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-7.6-7.0-6.1-4.3-3.5-4.9-9.5-9.4-8.9-8.9-8.2-8.3-7.9-8.0-8.8-8.6-8.6-9.0-8.7-9.2-8.9-8.8-9.9-7.8-8.9-8.6-9.6-2.1-2.5-2.2-1.53.72.9-2.8-2.0-1.0-0.6-1.3-1.0-1.4-1.3-1.1-0.51.11.41.61.93.68.6
Percentage of Assets-2.8-2.6-2.2-1.6-1.3-1.9-3.6-3.5-3.3-3.6-3.3-3.4-3.3-3.3-3.7-3.6-3.6-3.8-3.7-3.9-3.7-3.6-4.2-3.3-3.7-3.6-3.8-0.8-0.9-0.8-0.51.31.0-1.0-0.7-0.4-0.2-0.5-0.4-0.5-0.5-0.4-0.20.00.00.00.80.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value1561000.01561000.01557000.01556000.01556000.01553000.01548000.01546000.01546000.01545000.01545000.01544000.01544000.01544000.01543000.01543000.01543000.01538000.01538000.01538000.01537000.01536000.01536000.01536000.01535000.01534000.01531000.01531000.01531000.01530000.01530000.01524000.01524000.01516000.01516000.01509000.01507000.01494000.01481000.01476000.01464000.01451000.01402000.01389000.0
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

us-gaap:CommonStockValue bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan

us-gaap:RestrictedStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value3600000.03200000.04000000.04000000.04000000.03500000.03500000.03500000.03500000.03000000.02400000.02400000.02400000.02200000.04900000.04900000.04900000.04700000.02500000.02500000.02500000.02100000.04800000.04800000.04800000.04400000.02600000.02600000.02600000.02300000.03900000.03900000.03900000.03700000.02200000.02200000.02200000.02100000.01800000.01800000.01800000.01600000.04500000.02800000.0500000.0
Percentage of CommonStockValue230.6205.0256.9257.1257.1225.4226.1226.4226.4194.2155.3155.4155.4142.5317.6317.6317.6305.6162.5162.5162.7136.7312.5312.5312.7286.8169.8169.8169.8150.3254.9255.9255.9244.1145.1145.8146.0140.6121.5122.0123.0110.3321.0201.60.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:RestrictedStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value64056392635663486340632162946274627864146407640063916384637763706363633963336326631663066305630062936286627056845679566856625250524652325222519451845050493649164846477144174373
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 Assets29.028.827.827.627.629.029.629.529.531.331.631.832.032.632.933.033.033.433.633.733.332.934.333.232.932.831.530.130.129.928.126.927.033.533.834.333.935.533.435.234.934.533.135.4

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
Value-612.247-570.982-509.653-364.72-302.511-416.74-760.523-749.666-710.592-728.083-675.534-677.312-649.747-654.879-712.343-692.739-694.32-712.27-693.694-725.522-702.361-699.048-780.952-627.054-711.239-690.993-762.464-148.566-176.929-153.979-108.552246192-160.697-109.985-59.621-34.463-70.609-53.08-72.941-69.537-56.479-24.76395
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 Assets-2.8-2.6-2.2-1.6-1.3-1.9-3.6-3.5-3.3-3.6-3.3-3.4-3.3-3.3-3.7-3.6-3.6-3.8-3.7-3.9-3.7-3.6-4.2-3.3-3.7-3.6-3.8-0.8-0.9-0.8-0.51.31.0-1.0-0.7-0.4-0.2-0.5-0.4-0.5-0.5-0.4-0.20.8

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:RetainedEarnings


Retained
Period End2020-12-31
Value1.5
Percentage of RetainedEarningsAccumulatedDeficit-0.3
Percentage of Assets0.0
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:RetainedEarnings0.0

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-43166000.0-45139000.0-49890000.0-52622000.0-54921000.0-55700000.0-48335000.0-51996000.0-51340000.0-48734000.0-47741000.0-45137000.0-47695000.0-49062000.0-50429000.0-51796000.0-53161000.0-50983000.0-52251000.0-73943000.0-79748000.0-56706000.0-14114000.0-20625000.01848000.0-11907000.0-9304000.0-9866000.0-10429000.0-10989000.0-11556000.0-12122000.0-12689000.0-13253000.0-13817000.0-14379000.0-14978000.0-15558000.0-16138000.0-16717000.0-17294000.0-17867000.0-18436000.0-21777000.0
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-0.2-0.2-0.2-0.2-0.2-0.3-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.3-0.1-0.10.0-0.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.2

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value-43166000.0-45139000.0-49890000.0-52622000.0-54921000.0-48335000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2
Percentage of Assets bxp:BostonPropertiesLimitedPartnership-0.2-0.2-0.2-0.2-0.2-0.2

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
Value408152374228379175361254358207379209335225314220125246293159235348190165241201225160184124227215972371791321611691631521571324312215060
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 Revenues57.221.356.332.957.923.347.734.248.828.653.830.650.434.148.033.519.139.046.125.537.752.430.526.339.132.636.826.031.321.639.537.618.949.237.528.234.337.836.133.836.231.711.031.738.215.9

us-gaap:NetCashProvidedByUsedInOperatingActivities dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value408152374228379175361254
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues57.221.356.332.957.923.347.734.2
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership57.221.356.332.957.923.347.734.2

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
Value-321.338-242.273-225.308-267.889-46.729-73.793-278.625-408.514-104.437-223.515-78.809-534.266-302.013-183.788-275.387-82.957-276.877-262.593-224.673-678.792-316.235-109.357-679.0272191762.725-176.868-141.685-199.499-147.072-79.195-1.143-19.311-432.991-257.92-213.698-46.304-760.11-59.694159-69.077-121.029-385.568-490.14-132.62-152.946
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 Revenues-45.0-33.9-33.9-38.6-7.1-9.8-36.8-54.9-14.2-30.8-11.2-77.8-45.5-27.8-42.0-12.6-42.1-41.5-35.3-108.6-50.7-16.4-108.834.928.50.4-28.8-22.9-33.8-25.6-13.7-0.2-3.7-89.6-54.0-45.4-9.8-169.8-13.235.3-15.8-29.0-98.2-126.8-33.7-40.5

us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-321.338-242.273-225.308-267.889-46.729-73.793-278.625-408.514
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-45.0-33.9-33.9-38.6-7.1-9.8-36.8-54.9
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership-45.0-33.9-33.9-38.6-7.1-9.8-36.8-54.9

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-398.978-679.936-194.569-187.12880065-195.627-203.833476-190.612-85.40221238-92.23-97.634-136.857340-37.912-130.825-241.563-344.57642-174.795-341.182-139.715-902.854867-208.911-128.282-1162.701575-181.89662162-102.58-367.69965-641.163656-30.022-55.461257-448.597-65.584465-135.689
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 Revenues-55.9-95.3-29.3-27.0122.38.7-25.8-27.465.0-26.3-12.13.135.9-13.9-14.9-20.851.9-6.0-20.6-38.6-55.396.4-28.0-54.2-22.6-146.0141.3-33.8-21.8-202.399.9-31.7120.613.0-21.5-78.1204.8-143.2145.0-6.6-12.761.5-114.3-17.0118.1-35.9

us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-398.978-679.936-194.569-187.12880065-195.627-203.833
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-55.9-95.3-29.3-27.0122.38.7-25.8-27.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership-55.9-95.3-29.3-27.0122.38.7-25.8-27.4

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


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
Value-311.903-770.146-45.46-226.8661133166-112.879-358.159730-206.893215-303.276271-50.24-71.46537185-65.905
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-43.7-107.9-6.8-32.7173.022.2-14.9-48.299.6-28.530.5-44.240.9-7.6-10.95.628.3-10.4

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-311.903-770.146-45.46-226.8661133166-112.879-358.159
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-43.7-107.9-6.8-32.7173.022.2-14.9-48.2
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership-43.7-107.9-6.8-32.7173.022.2-14.9-48.2

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


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
Value18317616816617817116916517716416515715616515415215115917820315315916415316715416215715415415515413412112111111110910910911110992818183
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value182173166164176169168164
Percentage of DepreciationDepletionAndAmortization99.098.399.098.999.098.998.998.9

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


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
Value8.91-26.02-4.007-0.027-0.732-17.7844.1999.163-2.48614-27.62631-10.222-22.7910-10.49516-19.02318-8.17211-25.01826117.4151.1733.385-8.13813-21.6524.071-10.64617-10.695.5251.44-7.434-22.686323.249-10.273-6.0738.0377.626-10.8150.267
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsReceivable dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value8.91-26.02-4.007-0.027-0.732-17.7844.1999.163
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0

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
Value408152374228379175361254358207379209335225314220125246293159235348190165241201225160184124227215972371791321611691631521571324312215060
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 Revenues57.221.356.332.957.923.347.734.248.828.653.830.650.434.148.033.519.139.046.125.537.752.430.526.339.132.636.826.031.321.639.537.618.949.237.528.234.337.836.133.836.231.711.031.738.215.9

us-gaap:NetCashProvidedByUsedInOperatingActivities dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value408152374228379175361254
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues57.221.356.332.957.923.347.734.2
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership57.221.356.332.957.923.347.734.2

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value11110010922695001401101661001481211311781031191369914779991841371868217317413079568815545548655711864101706040-12.90357615253656744
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.614.11.613.341.166.518.614.822.813.921.117.719.827.015.818.220.815.823.112.715.927.722.129.613.328.128.421.113.49.915.427.188.39.913.712.325.214.422.415.613.89.8-3.314.915.613.914.217.517.311.8

us-gaap:NetIncomeLoss dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value12511412104304568161124188
Percentage of NetIncomeLoss112.7114.1122.9112.7113.2113.8114.7113.0112.8
Percentage of Revenues17.616.11.915.046.575.621.316.825.7
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership17.616.11.915.046.575.621.316.825.7

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1411282411829857717614120313118515016021613214716711516471117216166323100209211150956710617050657576613474115806948-12.756687262
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues19.818.03.717.045.676.723.219.027.718.126.321.924.232.720.222.525.418.325.911.418.832.526.751.316.333.834.524.416.311.818.529.798.312.012.014.028.516.525.517.816.011.5-3.317.618.416.5

us-gaap:ProfitLoss dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value14313126119303588177143205
Percentage of ProfitLoss101.2102.4107.0101.5101.8102.0101.0101.3101.2
Percentage of Revenues20.018.44.017.346.478.223.519.328.1
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership20.018.44.017.346.478.223.519.328.1

bxp:UnconsolidatedJointVentures


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-4.824-9.534-52.909-11.1396.8833.1840.4232.329393.05316-18.1994.9934.4886.4842.86109.0736.6546.8114.4223.5494.2695.456.3916.2065.8969.0635.8255.4664.606170.228-2.227-5.26-1.122182.947-5.96382.5355.595-13.3853.6698.3445.902
Percentage of ProfitLoss-3.4-7.4-212.4-9.42.30.60.21.619.22.39.0-12.13.12.14.91.96.17.94.09.53.81.62.61.76.33.02.86.06.18.14.310.30.0-3.8-9.2-1.713.64.0-5.247.73.611.6104.95.411.59.4
Percentage of Revenues-0.7-1.3-8.0-1.61.10.40.10.35.30.42.4-2.70.80.71.00.41.51.41.01.10.70.50.70.91.01.01.01.51.01.00.83.10.0-0.5-1.1-0.23.90.7-1.38.50.61.3-3.40.92.11.6
Percentage of Revenues bxp:UnconsolidatedJointVentures-5.3-10.9-107.8-12.77.73.40.53.148.73.720.2-23.98.77.911.55.218.116.612.813.911.59.411.014.316.315.714.821.615.214.412.146.10.2-1.6-4.0-0.811.72.1-4.025.51.73.8-8.92.45.53.9

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
Value14207.998.25310177.7057.80910158.4178.4578.471148.1018.0238.435107.6217.6437.578106.3586.3455.469115.3915.8096.519106.1546.5376.681254.826.7466.755115.975.9375.909116.1276.386.33414
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

bxp:BostonPropertiesLimitedPartnership


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value14207.998.25310177.7057.809
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0

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
Value-321.338-242.273-225.308-267.889-46.729-73.793-278.625-408.514-104.437-223.515-78.809-534.266-302.013-183.788-275.387-82.957-276.877-262.593-224.673-678.792-316.235-109.357-679.0272191762.725-176.868-141.685-199.499-147.072-79.195-1.143-19.311-432.991-257.92-213.698-46.304-760.11-59.694159-69.077-121.029-385.568-490.14-132.62-152.946
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 Revenues-45.0-33.9-33.9-38.6-7.1-9.8-36.8-54.9-14.2-30.8-11.2-77.8-45.5-27.8-42.0-12.6-42.1-41.5-35.3-108.6-50.7-16.4-108.834.928.50.4-28.8-22.9-33.8-25.6-13.7-0.2-3.7-89.6-54.0-45.4-9.8-169.8-13.235.3-15.8-29.0-98.2-126.8-33.7-40.5

us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-321.338-242.273-225.308-267.889-46.729-73.793-278.625-408.514
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-45.0-33.9-33.9-38.6-7.1-9.8-36.8-54.9
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership-45.0-33.9-33.9-38.6-7.1-9.8-36.8-54.9

Payments To Acquire Real Estate

us-gaap:PaymentsToAcquireRealEstate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:PaymentsToAcquireRealEstate

bxp:A153211SecondAvenue


Payments
Period End2021-06-02
Value100
Percentage of PaymentsToAcquireRealEstate100.0

us-gaap:PaymentsToAcquireRealEstate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementScenario

bxp:A11251RogerBaconDrive, us-gaap:ScenarioPlan


Payments
Period End2021-04-19
Value5.6
Percentage of PaymentsToAcquireRealEstate0.0

bxp:ShadyGroveBioTechCampus, us-gaap:ScenarioPlan


Payments
Period End2021-06-07
Value116
Percentage of PaymentsToAcquireRealEstate0.0

us-gaap:PaymentsToAcquireRealEstate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:SubsequentEventType

bxp:SafecoPlaza, us-gaap:SubsequentEvent


Payments
Period End2021-07-20
Value465
Percentage of PaymentsToAcquireRealEstate0.0

bxp:ShadyGroveBioTechCampus, us-gaap:SubsequentEvent


Payments
Period End2021-08-02
Value116
Percentage of PaymentsToAcquireRealEstate0.0

bxp:WalthamLabProperties, us-gaap:SubsequentEvent


Payments
Period End2021-05-03
Value100
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-398.978-679.936-194.569-187.12880065-195.627-203.833476-190.612-85.40221238-92.23-97.634-136.857340-37.912-130.825-241.563-344.57642-174.795-341.182-139.715-902.854867-208.911-128.282-1162.701575-181.89662162-102.58-367.69965-641.163656-30.022-55.461257-448.597-65.584465-135.689
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 Revenues-55.9-95.3-29.3-27.0122.38.7-25.8-27.465.0-26.3-12.13.135.9-13.9-14.9-20.851.9-6.0-20.6-38.6-55.396.4-28.0-54.2-22.6-146.0141.3-33.8-21.8-202.399.9-31.7120.613.0-21.5-78.1204.8-143.2145.0-6.6-12.761.5-114.3-17.0118.1-35.9

us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-398.978-679.936-194.569-187.12880065-195.627-203.833
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-55.9-95.3-29.3-27.0122.38.7-25.8-27.4
Percentage of Revenues bxp:BostonPropertiesLimitedPartnership-55.9-95.3-29.3-27.0122.38.7-25.8-27.4

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


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
Value171171172172172171166166166166166140140140131131131131114114114328114114114883113113116496113113112110939392928383838181818180
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividends dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value171171172172172171166166
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-170.2661721721721721721711661661661661661401401401311311311311141141143281141141148831131131134951121121101099292929183828280808080
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Dividends us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Dividendsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-17.25317171717171717171717171414141313131311111111491111111110.01010109.349.7021010101010
Percentage of Dividends10.110.09.910.010.010.110.310.310.310.310.210.210.210.210.110.110.110.410.310.310.410.49.910.010.010.010.410.310.810.810.910.911.211.712.213.013.113.413.4

us-gaap:RetainedEarnings


Dividendsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-153.01315515515515515415414914914914914912612612611811811811810210210229410210210279110210210244610110198988282828173737270706969
Percentage of Dividends89.990.090.190.090.089.989.789.789.789.789.889.889.889.889.989.989.989.689.789.789.689.689.689.789.689.789.589.789.990.190.090.090.089.689.789.289.289.189.188.888.387.887.086.986.686.6

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value96.9796.3796.3596.3596.3896.3897.21100.43101.0689.3532.6534.4434.2335.22
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

bxp:ExercisePrice10077


Share
Period End2020-12-31
Value100.77
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice103.9

bxp:ExercisePrice9569


Share
Period End2020-12-31
Value95.69
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice98.7

bxp:ExercisePrice9846


Share
Period End2020-12-31
Value98.46
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice101.5

bxp:ExercisePriceOf8686


Share
Period End2020-12-31
Value86.86
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice89.6

bxp:AboveAndBelowMarketRentAdjustments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

bxp:AboveAndBelowMarketRentAdjustments

bxp:ColoradoCenter


Above
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312016-12-312016-09-30
Value0.10.10.20.20.20.30.40.40.40.4-0.4-0.5
Percentage of AboveAndBelowMarketRentAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:Accruedrentalincomenetdeconsolidated

bxp:Accruedrentalincomenetdeconsolidated


Accruedrentalincomenetdeconsolidated
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0004558000.000
Percentage of Accruedrentalincomenetdeconsolidated0.00.00.0100.00.00.0

bxp:Accruedrentalincomenetdeconsolidated dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Accruedrentalincomenetdeconsolidateddei:
Period End2020-12-312020-09-302020-06-302020-03-31
Value0004558000.0
Percentage of Accruedrentalincomenetdeconsolidated0.00.00.0100.0

bxp:Allocationofundistributedearningstoparticipatingsecuritiespershares

bxp:Allocationofundistributedearningstoparticipatingsecuritiespershares


Allocationofundistributedearningstoparticipatingsecuritiespershares
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-09-302013-06-30
Value0-0.01-0.01-0.01000000000000-0.03
Percentage of Allocationofundistributedearningstoparticipatingsecuritiespershares0.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.0100.0

bxp:Amortizationofrightofuseassetoperatingleases

bxp:Amortizationofrightofuseassetoperatingleases


Amortizationofrightofuseassetoperatingleases
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-30
Value700000.02263000.0567000.0539000.0545000.0583000.0591000.0608000.0608000.0605000.00
Percentage of Amortizationofrightofuseassetoperatingleases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

bxp:Amortizationofrightofuseassetoperatingleases dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Amortizationofrightofuseassetoperatingleasesdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value700000.02263000.0567000.0539000.0545000.0583000.0591000.0608000.0
Percentage of Amortizationofrightofuseassetoperatingleases100.0100.0100.0100.0100.0100.0100.0100.0

bxp:AmountOfEarthquakeInsuranceProvidedByIXPLLCAsDirectInsurerSanFranciscoandLosAngeles

bxp:AmountOfEarthquakeInsuranceProvidedByIXPLLCAsDirectInsurerSanFranciscoandLosAngeles


Amount
Period End2021-06-302021-03-312020-12-31
Value0.0200.0
Percentage of AmountOfEarthquakeInsuranceProvidedByIXPLLCAsDirectInsurerSanFranciscoandLosAngeles0.0100.00.0

bxp:AnnualAggregateLimitOfEarthQuakeInsuranceSanFranciscoandLosAngeles

bxp:AnnualAggregateLimitOfEarthQuakeInsuranceSanFranciscoandLosAngeles


Annual
Period End2021-06-302021-03-312020-12-312017-12-312017-09-302017-06-302017-03-312017-02-28
Value0.02400.00.00.00.0240170
Percentage of AnnualAggregateLimitOfEarthQuakeInsuranceSanFranciscoandLosAngeles0.0100.00.00.00.00.0100.0100.0

bxp:CompanysShareOfNetIncomeLoss dei:LegalEntity

bxp:CompanysShareOfNetIncomeLoss

bxp:UnconsolidatedJointVentures


Companys
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-2.137-3.64-17.111-4.4214.0241.2520.0710.392221.5847.011-2.8582.1051.8266.8632.9094.3444.3233.0433.1792.0521.5992.0062.4812.902142.514.22.5782.6252.6383.1490.683-1.858-3.728-1.42101.3713.196-23.231-2.284-3.055
Percentage of CompanysShareOfNetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:ConversionsOfNoncontrollingInterestsToStockholdersEquity

bxp:ConversionsOfNoncontrollingInterestsToStockholdersEquity


Conversions
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.0874.1983.0160.33810153.450.2230.720.4920.7680.9160.3640.8320.1040.39150.7930.583.2173.11-0.44628-3.314-2.154-8.689-0.332-0.127-1.614-0.627-19.885-0.097-10.037-0.272-45.8574.4050.8056.026142318293.4349.7673.0030.978
Percentage of ConversionsOfNoncontrollingInterestsToStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:ConversionsOfNoncontrollingInterestsToStockholdersEquity dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Conversions
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2.0874.1983.0160.33810153.450.223
Percentage of ConversionsOfNoncontrollingInterestsToStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0

bxp:CoverageForActsOfTerrorismUnderTriaCoveredInExcessOfAmountCoveredByIxp us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

bxp:CoverageForActsOfTerrorismUnderTriaCoveredInExcessOfAmountCoveredByIxp

bxp:SixZeroOneLexingtonAvenue


Coverage
Period End2021-06-302021-03-312020-12-31
Value0.02500.0
Percentage of CoverageForActsOfTerrorismUnderTriaCoveredInExcessOfAmountCoveredByIxp0.0100.00.0

bxp:DeferredDistributionsFromSaleOfInvestmentInUnconsolidatedJointVenture

bxp:DeferredDistributionsFromSaleOfInvestmentInUnconsolidatedJointVenture


Deferred
Period End2021-03-31
Value5808000.0
Percentage of DeferredDistributionsFromSaleOfInvestmentInUnconsolidatedJointVenture100.0

bxp:DeferredDistributionsFromSaleOfInvestmentInUnconsolidatedJointVenture dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Deferred
Period End2021-03-31
Value5808000.0
Percentage of DeferredDistributionsFromSaleOfInvestmentInUnconsolidatedJointVenture100.0

bxp:DeferredProceedsFromSaleOfInvestmentInUnconsolidatedJointVenture

bxp:DeferredProceedsFromSaleOfInvestmentInUnconsolidatedJointVenture


Deferred
Period End2021-03-31
Value200000.0
Percentage of DeferredProceedsFromSaleOfInvestmentInUnconsolidatedJointVenture100.0

bxp:DeferredProceedsFromSaleOfInvestmentInUnconsolidatedJointVenture dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Deferred
Period End2021-03-31
Value200000.0
Percentage of DeferredProceedsFromSaleOfInvestmentInUnconsolidatedJointVenture100.0

bxp:DistributionsMadeToMYLTIPUnitsPerUnit dei:LegalEntity

bxp:DistributionsMadeToMYLTIPUnitsPerUnit

bxp:BostonPropertiesLimitedPartnership


Distributions
Period End2020-07-312020-04-302020-01-302019-10-312019-07-312019-04-302019-01-30
Value0.0980.0980.0980.0950.0950.0950.095
Percentage of DistributionsMadeToMYLTIPUnitsPerUnit100.0100.0100.0100.0100.0100.0100.0

bxp:DistributionsPercentBeforeMeasurementDate us-gaap:AwardType

bxp:DistributionsPercentBeforeMeasurementDate

bxp:TwoThousandTwentyOneMYLTIPS


Distributions
Period End2021-02-02
Value10.0
Percentage of DistributionsPercentBeforeMeasurementDate100.0

bxp:EarningsPerShareAfterAllccationofUndistributedEarningstoParticiaptingSecuritiesBasicdollarspershare

bxp:EarningsPerShareAfterAllccationofUndistributedEarningstoParticiaptingSecuritiesBasicdollarspershare


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value0.720.590.050.581.713.21.060.630.970.770.831.140.760.870.960.50.631.181.20.511.120.83
Percentage of EarningsPerShareAfterAllccationofUndistributedEarningstoParticiaptingSecuritiesBasicdollarspershare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:EarningsPerShareAfterAllccationofUndistributedEarningstoParticiaptingSecuritiesBasicdollarspershare dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-30
Value0.730.610.060.591.753.281.08
Percentage of EarningsPerShareAfterAllccationofUndistributedEarningstoParticiaptingSecuritiesBasicdollarspershare101.4103.4120.0101.7102.3102.5101.9

bxp:EmployeeAndDirectorPaymentPerShare bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan

bxp:EmployeeAndDirectorPaymentPerShare

bxp:LTIPand2014MYLTIPUnits


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312014-12-312014-09-30
Value0.250.250000.2500
Percentage of EmployeeAndDirectorPaymentPerShare100.0100.00.00.00.0100.00.00.0

us-gaap:RestrictedStock


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.010.010000.010000.010000.010000.010000.010000.010000.010000.010000.010000.01
Percentage of EmployeeAndDirectorPaymentPerShare4.04.00.00.00.04.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:EquityProfitLoss

bxp:EquityProfitLoss


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value141-128.147-24.905-118.06-298.58-577.146-1127.989141203131-1239.8851501602161321471671151647111721616632298206209148906510216750454546513373114796847-13.551677161
Percentage of EquityProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:EquityProfitLoss us-gaap:StatementEquityComponents

bxp:Noncontrollinginterestpropertypartnerships


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value17-16.467-13.98-15.5610.767-19.486-125.902181718-109.393141417
Percentage of EquityProfitLoss12.212.956.113.2-0.33.411.213.18.614.48.89.99.08.0

us-gaap:NoncontrollingInterest


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value12-11.084-0.614-9.565-29.986-57.539-102.478121911-225.3281314372527301515-7.87618312613516333118118.7461012496.7436.2437.428148.577139.2098.766.558-0.8379.615108.901
Percentage of EquityProfitLoss8.78.62.58.110.010.09.18.89.48.818.29.29.317.419.518.818.413.79.1-11.015.514.715.742.116.616.015.212.112.913.410.37.49.812.311.511.411.211.711.611.612.713.86.214.314.314.4

us-gaap:RetainedEarnings


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value111-100.596-10.311-92.934-269.361-500.121-899.609110166100-1014.5571211311781061191369914979991841401868217317713079569115545448485711964101706040-12.714576152
Percentage of EquityProfitLoss79.178.541.478.790.286.779.878.182.176.881.880.981.882.680.581.281.686.390.9111.084.585.384.357.983.484.084.887.987.186.689.792.690.287.788.588.688.888.388.488.487.386.293.885.785.785.6

bxp:Finalawardspercentageoftarget us-gaap:AwardType

bxp:Finalawardspercentageoftarget

bxp:MYLTIPTwoThousandEighteen


Finalawardspercentageoftargetus-gaap:
Period End2021-02-05
Value29.2
Percentage of Finalawardspercentageoftarget100.0

bxp:Finalawardspercentageoftarget us-gaap:AwardType, us-gaap:SubsequentEventType

bxp:MYLTIPTwoThousandEighteen, us-gaap:SubsequentEvent


Finalawardspercentageoftargetus-gaap:
Period End2021-02-05
Value29.2
Percentage of Finalawardspercentageoftarget100.0

bxp:IncomeStatementBasisDifferential dei:LegalEntity

bxp:IncomeStatementBasisDifferential

bxp:UnconsolidatedJointVentures


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
Value0.764-1.392-2.065-2.452-2.192-1.621-1.007-1.04125-1.371-1.706-1.455-1.336-1.365-2.666-2.066-1.236-1.239-0.458-1.7150.1820.1920.2050.1660.1760.1920.190.2190.2560.1910.1960.413-2.070.4440.450.3840.4310.466-1.313251.7591.756-1.3533.1252.5162.277
Percentage of IncomeStatementBasisDifferential100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:IncreaseDecreaseInParkingAndOtherRevenuePrimarilyRelatedToCOVID19 us-gaap:ProductOrService

bxp:IncreaseDecreaseInParkingAndOtherRevenuePrimarilyRelatedToCOVID19

bxp:ParkingandOther


Increase
Period End2021-06-302021-03-312020-12-312020-09-30
Value4.3-7.6109.3
Percentage of IncreaseDecreaseInParkingAndOtherRevenuePrimarilyRelatedToCOVID19100.0100.0100.0100.0

bxp:IssuanceOfRestrictedSecuritiesToEmployeesAndDirectors

bxp:IssuanceOfRestrictedSecuritiesToEmployeesAndDirectors


Issuance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.2641-0.637-0.2180.35843-1.3010.01.49537-0.290.00.909360.278-0.2341.35334-0.0960.01.08132-0.0080.01.084420.00.00.911260.00.04.17625-0.1530.396-0.184260.00.00.704240.00.4540.018
Percentage of IssuanceOfRestrictedSecuritiesToEmployeesAndDirectors100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.00.0100.0

bxp:IssuanceOfRestrictedUnitsToEmployeesAndDirectors dei:LegalEntity

bxp:IssuanceOfRestrictedUnitsToEmployeesAndDirectors

bxp:BostonPropertiesLimitedPartnership


Issuance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1.2641-0.637-0.2180.35843-1.3010.0
Percentage of IssuanceOfRestrictedUnitsToEmployeesAndDirectors100.0100.0100.0100.0100.0100.0100.00.0

bxp:NetIncomeAllocableToGeneralAndLimitedPartnerUnits us-gaap:StatementEquityComponents

bxp:NetIncomeAllocableToGeneralAndLimitedPartnerUnits

bxp:BostonPropertiesLimitedPartnership


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1131019.43392271508142109166
Percentage of NetIncomeAllocableToGeneralAndLimitedPartnerUnits100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:Capital


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value13012026110273530161130186123175139148200
Percentage of NetIncomeAllocableToGeneralAndLimitedPartnerUnits115.1118.8276.0119.8100.7104.3113.3119.2112.10.00.00.00.00.0

bxp:NoncontrollinginterestRedeemablepartnershipunits


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value12110.6149.56529571612191117131420
Percentage of NetIncomeAllocableToGeneralAndLimitedPartnerUnits10.911.06.510.411.011.311.411.411.40.00.00.00.00.0

bxp:Noncontrollinginterestpropertypartnerships


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value17161315-0.767191618171816141417
Percentage of NetIncomeAllocableToGeneralAndLimitedPartnerUnits15.116.3148.216.9-0.33.811.516.910.50.00.00.00.00.0

us-gaap:PreferredStock


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.02.562.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.6252.625
Percentage of NetIncomeAllocableToGeneralAndLimitedPartnerUnits0.02.527.82.91.00.51.82.41.60.00.00.00.00.0

bxp:NetIncomeLossAvailableToCommonStockholdersAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasic

bxp:NetIncomeLossAvailableToCommonStockholdersAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasic


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value8.0889026649616498148119128175117133147769618118379170127
Percentage of NetIncomeLossAvailableToCommonStockholdersAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:NetIncomeLossAvailableToCommonStockholdersAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasic dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-06-30
Value10101301565185
Percentage of NetIncomeLossAvailableToCommonStockholdersAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasic129.8112.5113.3113.8113.0

bxp:NetOperatingIncome dei:LegalEntity, us-gaap:ConsolidationItems

bxp:NetOperatingIncome

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value432424397452
Percentage of NetOperatingIncome100.0100.0100.0100.0

bxp:NetOperatingIncome dei:LegalEntity, us-gaap:StatementBusinessSegments

bxp:BostonPropertiesLimitedPartnership, us-gaap:IntersegmentElimination


Net
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value371404397447433433
Percentage of NetOperatingIncome0.00.0100.00.00.00.0

bxp:NetOperatingIncome us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value432424397452
Percentage of NetOperatingIncome100.0100.0100.0100.0

bxp:NetOperatingIncome us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value371404397452447433433425429411406401403401410390394382392432393396390
Percentage of NetOperatingIncome0.00.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxp:PerOccurrenceLimitForNbcrCoverage

bxp:PerOccurrenceLimitForNbcrCoverage


Per
Period End2021-06-302021-03-312020-12-31
Value0.010000.0
Percentage of PerOccurrenceLimitForNbcrCoverage0.0100.00.0

bxp:PerOccurrenceLimitOfEarthQuakeInsuranceSanFranciscoandLosAngeles

bxp:PerOccurrenceLimitOfEarthQuakeInsuranceSanFranciscoandLosAngeles


Per
Period End2021-06-302021-03-312020-12-312017-12-312017-09-302017-06-302017-03-312017-02-28
Value0.02400.00.00.00.0240170
Percentage of PerOccurrenceLimitOfEarthQuakeInsuranceSanFranciscoandLosAngeles0.0100.00.00.00.00.0100.0100.0

bxp:PercentageOfTotalNetOperatingIncome

bxp:PercentageOfTotalNetOperatingIncome


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value100.0100.00100.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.0
Percentage of PercentageOfTotalNetOperatingIncome100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

bxp:PercentageOfTotalNetOperatingIncome us-gaap:StatementGeographical

bxp:Boston


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value33.6933.94033.770.35520.33850.00370.32840.32580.3138-0.00080.33460.33690.31470.00640.3140.29990.28470.00410.30620.29530.25180.00210.28450.29920.2648-0.0020.30.31360.2969-0.00450.30980.34350.34450.00260.35870.35820.32560.00260.32770.33440.3208
Percentage of PercentageOfTotalNetOperatingIncome33.733.90.033.835.533.90.032.832.631.40.033.533.731.50.031.430.028.50.030.629.525.20.028.429.926.50.030.031.429.70.031.034.434.40.035.935.832.60.032.833.432.1

bxp:SanFrancisco


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value18.6220.04-0.5320.380.22150.19970.00230.1980.19330.18520.00410.16520.15310.1551-0.00010.15050.1450.15410.00370.14180.13530.12120.00210.12980.12790.12780.00160.11230.11040.1131-0.00060.10620.11330.1117-0.00090.11340.10780.1165-0.00320.11780.12390.1269
Percentage of PercentageOfTotalNetOperatingIncome18.620.00.020.422.120.00.019.819.318.50.016.515.315.50.015.014.515.40.014.213.512.10.013.012.812.80.011.211.011.30.010.611.311.20.011.310.811.70.011.812.412.7

stpr:DC


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312014-12-312014-09-302013-09-30
Value12.4912.05-0.0912.270.13530.1307-13.81213.820.14030.1399-0.00230.17520.1921
Percentage of PercentageOfTotalNetOperatingIncome12.512.10.012.313.513.10.01382.014.014.00.017.519.2

stpr:NY


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302013-09-30
Value35.233.970.6233.580.2880.3311-0.00470.33540.34060.3611-0.00180.34290.34960.3702-0.00690.36470.38650.384-0.00920.37210.39590.46950.00270.41250.3908
Percentage of PercentageOfTotalNetOperatingIncome35.234.00.033.628.833.10.033.534.136.10.034.335.037.00.036.538.638.40.037.239.646.90.041.239.1

bxp:PercentageOfTotalRentalExpenses

bxp:PercentageOfTotalRentalExpenses


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value100.0100.00100.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.0
Percentage of PercentageOfTotalRentalExpenses100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

bxp:PercentageOfTotalRentalExpenses us-gaap:StatementGeographical

bxp:Boston


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value32.5532.14-0.4133.050.32640.33620.00140.33270.32960.3337-0.0020.3430.35120.3579-0.00020.3460.34790.35190.00090.34020.34190.3476-0.00310.35320.35280.3692-0.00570.35470.35920.3768-0.00930.37020.38760.4175-0.00310.42310.41210.40890.00520.39730.39250.3861
Percentage of PercentageOfTotalRentalExpenses32.532.10.033.032.633.60.033.333.033.40.034.335.135.80.034.634.835.20.034.034.234.80.035.335.336.90.035.535.937.70.037.038.841.80.042.341.240.90.039.739.238.6

bxp:SanFrancisco


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value16.9516.160.0216.160.16170.15780.00220.16730.16370.1550.00480.13250.12660.11120.00220.1090.10860.10400.110.11270.10540.0010.11360.10950.09970.00060.10710.10760.0963-0.00060.10290.11960.1108-0.00120.12360.12240.1229-0.00240.13010.13420.133
Percentage of PercentageOfTotalRentalExpenses16.916.20.016.216.215.80.016.716.415.50.013.212.711.10.010.910.910.40.011.011.310.50.011.410.910.00.010.710.89.60.010.312.011.10.012.412.212.30.013.013.413.3

stpr:DC


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312014-12-312014-09-302013-09-30
Value13.5413.39-0.0413.330.14650.1385-14.19714.030.14420.1459-0.0010.16860.1709
Percentage of PercentageOfTotalRentalExpenses13.513.40.013.314.613.90.01403.014.414.60.016.917.1

stpr:NY


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302013-09-30
Value36.9638.310.4337.460.36540.3675-0.00330.35970.36250.3654-0.00250.37680.37260.3775-0.00210.38970.38980.3895-0.00120.40170.39290.39150.00610.36960.3563
Percentage of PercentageOfTotalRentalExpenses37.038.30.037.536.536.80.036.036.236.50.037.737.337.80.039.039.039.00.040.239.339.10.037.035.6

bxp:PercentageOfTotalRevenue

bxp:PercentageOfTotalRevenue


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value100.0100.00100.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.0
Percentage of PercentageOfTotalRevenue100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

bxp:PercentageOfTotalRevenue us-gaap:StatementGeographical

bxp:Boston


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value33.2833.28-0.1633.480.34430.33770.00280.330.32720.3212-0.00120.33780.34230.33120.0040.32610.31760.310.0030.31920.31240.28480.00010.30960.31870.3038-0.00340.31990.330.3268-0.00640.33180.35980.37220.00050.38320.37780.35660.00370.35290.35490.3439
Percentage of PercentageOfTotalRevenue33.333.30.033.534.433.80.033.032.732.10.033.834.233.10.032.631.831.00.031.931.228.50.031.031.930.40.032.033.032.70.033.236.037.20.038.337.835.70.035.335.534.4

bxp:SanFrancisco


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value18.0218.61-0.3518.770.19910.18440.00220.18650.18230.1740.00440.15260.14310.13830.00080.13470.13160.13530.00230.12960.12710.11570.00170.12390.12120.11730.00120.11040.10940.1068-0.00060.1050.11560.1114-0.0010.11730.11310.1189-0.00290.12230.12750.1291
Percentage of PercentageOfTotalRevenue18.018.60.018.819.918.40.018.618.217.40.015.314.313.80.013.513.213.50.013.012.711.60.012.412.111.70.011.010.910.70.010.511.611.10.011.711.311.90.012.212.812.9

stpr:DC


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312014-12-312014-09-302013-09-30
Value12.8612.54-0.0612.680.13950.1336-13.9513.90.14180.1421-0.00180.17280.1844
Percentage of PercentageOfTotalRevenue12.912.50.012.714.013.40.01390.014.214.20.017.318.4

stpr:NY


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302013-09-30
Value35.8435.570.5735.070.31710.3443-0.00410.34450.34870.3627-0.00210.3560.35830.3731-0.00520.37430.38770.386-0.00630.38340.39470.44270.0040.39690.3783
Percentage of PercentageOfTotalRevenue35.835.60.035.131.734.40.034.434.936.30.035.635.837.30.037.438.838.60.038.339.544.30.039.737.8

bxp:PercentageofCompanysShareofNetOperatingIncome

bxp:PercentageofCompanysShareofNetOperatingIncome


Percentageof
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value100.0100.00100.01.01.001.01.01.001.01.01.0
Percentage of PercentageofCompanysShareofNetOperatingIncome100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

bxp:PercentageofCompanysShareofNetOperatingIncome us-gaap:StatementGeographical

bxp:Boston


Percentageof
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value33.733.640.2533.350.33920.3360.0040.3260.32010.3096-0.00250.33290.34060.3196
Percentage of PercentageofCompanysShareofNetOperatingIncome33.733.60.033.433.933.60.032.632.031.00.033.334.132.0

bxp:LosAngeles


Percentageof
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.843.340.142.960.03780.0352-0.00020.03390.03570.03690.00370.03390.01820.019
Percentage of PercentageofCompanysShareofNetOperatingIncome2.83.30.03.03.83.50.03.43.63.70.03.41.81.9

bxp:SanFrancisco


Percentageof
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value20.3521.79-0.3422.260.23440.2150.00230.20860.20260.19360.00340.17390.16420.168
Percentage of PercentageofCompanysShareofNetOperatingIncome20.421.80.022.323.421.50.020.920.319.40.017.416.416.8

stpr:DC


Percentageof
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value14.4313.93-0.2814.170.15020.149-16.0816.10.16260.1637
Percentage of PercentageofCompanysShareofNetOperatingIncome14.413.90.014.215.014.90.01610.016.316.4

stpr:NY


Percentageof
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value28.6827.30.2327.260.23840.2648-0.00410.27050.2790.2962-0.00220.27640.28730.3023
Percentage of PercentageofCompanysShareofNetOperatingIncome28.727.30.027.323.826.50.027.127.929.60.027.628.730.2

bxp:Programtriggerdeductible

bxp:Programtriggerdeductible


Programtriggerdeductible
Period End2021-06-302021-03-312020-12-31
Value020.00
Percentage of Programtriggerdeductible0.0100.00.0

bxp:RedeemableCommonUnits dei:LegalEntity

bxp:RedeemableCommonUnits

bxp:BostonPropertiesLimitedPartnership


Redeemable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1717-0.068171717-0.0121717
Percentage of RedeemableCommonUnits100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:RentalExpensesClassOffice

bxp:RentalExpensesClassOffice


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value242251250253235258264261253253226222226216217211214209213203206194198188193173167164163155151149148140136
Percentage of RentalExpensesClassOffice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:RentalExpensesClassOffice us-gaap:StatementGeographical

bxp:Boston


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value7879788175828381777975727168706770677464696571636763656165605755555047
Percentage of RentalExpensesClassOffice32.231.831.332.332.131.931.731.130.631.333.232.431.531.832.532.132.732.534.831.933.433.836.033.735.136.539.337.140.038.838.336.937.336.235.2

bxp:SanFrancisco


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value4040394139424745434124252625232424232122222119192021192121202020202019
Percentage of RentalExpensesClassOffice16.916.016.016.416.616.417.817.517.216.210.811.411.511.811.011.411.611.210.310.910.910.99.710.610.312.311.913.013.313.213.313.714.014.414.2

stpr:DC


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312014-12-312014-09-302013-09-30
Value30313231323436353536363231
Percentage of RentalExpensesClassOffice12.812.613.112.613.913.413.913.714.114.218.215.916.4

stpr:NY


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-03-312016-03-312014-12-312014-09-302013-09-30
Value929999978899979896969188838273
Percentage of RentalExpensesClassOffice38.239.639.738.737.538.336.637.738.138.240.440.841.239.837.9

bxp:RentalExpensesOperatingExpensesTotal

bxp:RentalExpensesOperatingExpensesTotal


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value250259257261241269277274267265261256246248242245238235231236225226224227222228218222209213203206187179178175167163165159149145
Percentage of RentalExpensesOperatingExpensesTotal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:RentalExpensesOperatingExpensesTotal us-gaap:StatementGeographical

bxp:Boston


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value818381867890939188888988868884858382808077787780788474797580727672757174696668635856
Percentage of RentalExpensesOperatingExpensesTotal32.532.131.533.132.633.633.733.333.033.434.334.335.135.834.834.634.835.234.734.034.234.834.635.335.336.934.135.535.937.735.937.038.841.740.142.341.240.941.139.739.238.6

bxp:SanFrancisco


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value424141423942474543413734312728262524252625232525242223232220212122192121202020202019
Percentage of RentalExpensesOperatingExpensesTotal17.016.216.116.216.215.817.016.716.415.514.213.212.711.111.610.910.910.410.911.011.310.511.211.411.010.010.610.710.89.610.410.312.011.112.012.412.212.312.413.013.413.3

stpr:DC


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312014-12-312014-09-302013-09-30
Value33343534353739383838373735
Percentage of RentalExpensesOperatingExpensesTotal13.513.413.813.314.613.914.214.014.414.617.016.917.0

stpr:NY


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302013-09-30
Value92999997889997989696959691939295939190958888838273
Percentage of RentalExpensesOperatingExpensesTotal37.038.338.637.536.636.735.036.036.336.536.637.737.337.738.139.039.039.039.140.239.339.238.337.035.4

bxp:RentalExpensesResidential

bxp:RentalExpensesResidential


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value5.9286.1275.7554.9553.9654.0644.0784.0114.1223.7743.6953.7242.9132.2721.5391.5771.6351.5511.6472.2231.6061.61.6161.5341.5313.5464.0614.1633.9363.7623.662.9072.832.7332.8492.8542.5742.7152.3382.4180.723
Percentage of RentalExpensesResidential100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:RentalExpensesResidential us-gaap:StatementGeographical

bxp:Boston


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value1.4351.4551.4531.351.2351.341.3421.2441.2791.2061.2531.1590.7060.5140.4920.5120.5450.4950.5341.1410.5130.520.5010.4850.5110.5090.4560.5090.5440.4480.5070.4660.4070.4430.4280.490.3670.390.2510.27
Percentage of RentalExpensesResidential24.223.725.227.231.133.032.931.031.032.033.931.124.222.632.032.533.331.932.451.331.932.531.031.633.414.411.212.213.811.913.916.014.416.215.017.214.314.410.711.2

bxp:SanFrancisco


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1.5441.6861.5210.740.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RentalExpensesResidential26.027.526.414.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

stpr:DC


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312014-12-312014-09-302013-09-30
Value2.9492.9862.7812.8652.732.7242.7362.7672.8432.5683.6053.6542.441
Percentage of RentalExpensesResidential49.748.748.357.868.967.067.169.069.068.088.887.884.0

bxp:RentalRevenueClassOffice

bxp:RentalRevenueClassOffice


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value692693646673634724722707697696614611602601646588592581582573577548539529537475450451438436415416421406392363360355351
Percentage of RentalRevenueClassOffice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:RentalRevenueClassOffice us-gaap:StatementGeographical

bxp:Boston


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value229230214225218239235224217217185186183179177174173174169171176173170168171164161160161157140140141135127
Percentage of RentalRevenueClassOffice33.133.233.233.534.433.032.631.731.231.230.230.530.629.827.529.629.330.129.229.830.631.631.731.831.934.635.835.536.836.133.933.633.433.432.4

bxp:SanFrancisco


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value12613011512812813614113613112484838078767371686663615754545353525454525252535452
Percentage of RentalRevenueClassOffice18.218.817.819.020.218.919.619.318.917.813.813.713.313.111.812.512.111.811.411.110.710.510.110.410.011.211.712.012.411.912.612.512.813.313.5

stpr:DC


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312014-12-312014-09-302013-09-30
Value848279798393969596961089696
Percentage of RentalRevenueClassOffice12.211.912.311.913.212.913.313.513.813.819.016.717.9

stpr:NY


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-03-312016-03-312014-12-312014-09-302013-09-30
Value252250236239204255249251251258241291244243214
Percentage of RentalRevenueClassOffice36.436.136.735.632.235.234.635.636.137.139.345.142.642.139.9

bxp:RentalRevenueResidential

bxp:RentalRevenueResidential


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value9.7639.1759.079.7189.4029.956109.9968.9997.7157.2736.324.7994.1594.1354.2954.213.9564.194.3724.0884.0494.1074.1113.8116.8547.1957.0186.2985.6825.7635.4935.4845.5785.5555.4965.0364.4813.5882.4530.576
Percentage of RentalRevenueResidential100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:RentalRevenueResidential us-gaap:StatementGeographical

bxp:Boston


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value3.1313.0453.1043.0433.4014.0684.0543.8093.2222.7012.4421.9051.1951.1521.2251.2281.1531.1391.2341.2271.181.1711.2171.2751.1311.1781.1391.1371.0891.1631.1381.1251.0651.0671.0450.9951.0130.8830.7010.284
Percentage of RentalRevenueResidential32.133.234.231.336.240.939.738.135.835.033.630.124.927.729.628.627.428.829.528.128.928.929.631.029.717.215.816.217.320.519.720.519.419.118.818.120.119.719.511.6

bxp:SanFrancisco


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.690.3210.1320.0230.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RentalRevenueResidential7.13.51.50.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

stpr:DC


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312014-12-312014-09-302013-09-30
Value5.9425.8095.8346.6526.0015.8886.156.1875.7775.0146.0565.8814.368
Percentage of RentalRevenueResidential60.963.364.368.563.859.160.361.964.265.084.283.879.5

bxp:RentalRevenueTotal

bxp:RentalRevenueTotal


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value703703655683644741744730721713690668653649645646649625626618618659617623613613606612583569561568507469462458461
Percentage of RentalRevenueTotal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:RentalRevenueTotal us-gaap:StatementGeographical

bxp:Boston


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value234234217228221250251241236229229225223215215210206193198197193187192193195186189195192186185188182175175177174
Percentage of RentalRevenueTotal33.333.333.233.534.433.833.733.032.732.133.233.834.233.133.432.631.831.031.731.931.228.531.131.031.930.431.232.033.032.733.133.236.037.538.038.737.8

bxp:SanFrancisco


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value12613011512812813614113613112411110293898887858483807876787774716967636060595852525252
Percentage of RentalRevenueTotal18.018.617.618.819.918.419.018.618.217.416.215.314.313.813.713.513.213.513.313.012.711.612.812.412.111.711.411.010.910.710.810.511.611.311.511.511.3

stpr:DC


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312014-12-312014-09-302013-09-30
Value908885868999102101102101103105104
Percentage of RentalRevenueTotal12.912.513.012.713.913.413.713.914.214.217.117.318.4

stpr:NY


Rental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302013-09-30
Value252250236239204255249251251258244237234242233242251241239237243291244243214
Percentage of RentalRevenueTotal35.835.636.135.131.734.433.634.534.936.335.435.635.837.336.237.438.838.638.238.339.544.340.339.737.7

bxp:SeniorNotesPricing dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

bxp:SeniorNotesPricing

bxp:BostonPropertiesLimitedPartnership, bxp:TwoPointSixSevenOnePercentUnsecuredSeniorNotes, us-gaap:SeniorNotes


Senior
Period End2021-03-16
Value99.57
Percentage of SeniorNotesPricing100.0

bxp:TransferOfTenantImprovementsRealEstate

bxp:TransferOfTenantImprovementsRealEstate


Transfer
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.00.0120.00.0
Percentage of TransferOfTenantImprovementsRealEstate0.00.00.0100.00.00.0

bxp:TransferOfTenantImprovementsRealEstate dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Transfer
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.012
Percentage of TransferOfTenantImprovementsRealEstate0.00.00.0100.0

bxp:TransferOfTenantLeaseCostsRealEstate

bxp:TransferOfTenantLeaseCostsRealEstate


Transfer
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0003462000.000
Percentage of TransferOfTenantLeaseCostsRealEstate0.00.00.0100.00.00.0

bxp:TransferOfTenantLeaseCostsRealEstate dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Transfer
Period End2020-12-312020-09-302020-06-302020-03-31
Value0003462000.0
Percentage of TransferOfTenantLeaseCostsRealEstate0.00.00.0100.0

bxp:ValueOfLtipUnitsIssued bxp:StockOptionAndIncentivePlanAndStockRepurchasePlan

bxp:ValueOfLtipUnitsIssued

bxp:LTIPUnits


Value
Period End2020-09-30
Value0.0
Percentage of ValueOfLtipUnitsIssued0.0

bxp:ValueOfLtipUnitsIssued us-gaap:AwardType

bxp:LTIPUnits


Value
Period End2021-06-302021-03-31
Value2323
Percentage of ValueOfLtipUnitsIssued0.00.0

bxp:WeightedAverageNumberDilutedSharesOutstandingAdjustmentpershare

bxp:WeightedAverageNumberDilutedSharesOutstandingAdjustmentpershare


Weighted
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-0.01000000-0.0100
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustmentpershare100.00.00.00.00.00.00.0100.00.00.0

bxp:WeightedAverageNumberOfSharesOutstandingAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasicinshares

bxp:WeightedAverageNumberOfSharesOutstandingAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasicinshares


Weighted
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value0.0830.151551551541540.0130.0141541541541540.0340.0370.0181531530.111153153
Percentage of WeightedAverageNumberOfSharesOutstandingAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasicinshares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:WeightedAverageNumberOfSharesOutstandingAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasicinshares dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Weighted
Period End2020-12-312020-09-302020-06-302020-03-312019-06-30
Value0.0150.024172172172
Percentage of WeightedAverageNumberOfSharesOutstandingAfterAllocationofUndistributedEarningstoParticipatingSecuritiesBasicinshares18.116.0111.1111.3111.4

bxp:Writeoffoffullydepreciatedrealestate

bxp:Writeoffoffullydepreciatedrealestate


Writeoffoffullydepreciatedrealestate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value7325252311384325293135214929-228.863173649-375.5821163517-78.98715
Percentage of Writeoffoffullydepreciatedrealestate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:Writeoffoffullydepreciatedrealestate dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Writeoffoffullydepreciatedrealestatedei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value7323252311384225
Percentage of Writeoffoffullydepreciatedrealestate100.094.8100.0100.0100.0100.098.7100.0

dei:EntityListingParValuePerShare us-gaap:StatementClassOfStock

dei:EntityListingParValuePerShare

bxp:A5.25SeriesBCumulativeRedeemablePreferredStockparvalue0.01pershare


Entity
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0000.0100
Percentage of EntityListingParValuePerShare0.00.00.0100.00.00.0

us-gaap:CommonStock


Entity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value00.010000.0100
Percentage of EntityListingParValuePerShare0.00.00.00.00.0100.00.00.0

us-gaap:AccretionExpense

us-gaap:AccretionExpense


Accretion
Period End2021-06-302021-03-312019-12-312018-12-31
Value0-6290000.00-483000.0
Percentage of AccretionExpense0.0100.00.0100.0

us-gaap:AccretionExpense dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Accretion
Period End2021-06-302021-03-312019-12-31
Value0-6290000.00
Percentage of AccretionExpense0.0100.00.0

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2672334911080-401.94918511215476194591749.46618272-41.2621301288811713223-157.469140-7.724149.709885612145-409.35217912166279548728884555477-2.413
Percentage of AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2652034710875-413.247183110
Percentage of AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities99.387.299.598.493.5102.899.098.4

us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries

us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries


Allowance
Period End2021-03-31
Value200000.0
Percentage of AllowanceForDoubtfulAccountsReceivableRecoveries100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs


Allowance
Period End2021-06-302020-12-312020-09-302020-06-302020-03-31
Value0.30.33.4180.3
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs100.0100.0100.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.60.6264.1351.2
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs dei:LegalEntity

bxp:UnconsolidatedJointVentures


Allowance
Period End2021-03-31
Value0.3
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs50.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period 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-19.95642-11.076561.954-27.415-6.612-19.2936549-33.12-12.072
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-19.95642-11.07656-52.876276.612-211.007
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0-2706.0-100.0-100.01093.7

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-04-302021-01-282020-10-302020-07-312020-04-302020-01-302019-10-312019-07-312019-04-302019-01-302018-10-312018-07-312018-04-302018-01-302017-10-312017-07-312017-04-282017-01-302016-10-312016-07-292016-04-292016-01-282015-10-302015-07-312015-04-302015-01-282014-10-312014-07-302014-04-302014-01-292013-10-312013-07-312013-04-302013-01-292012-10-312012-07-312012-04-302012-01-272011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value0.980.980.980.980.980.980.950.950.950.950.950.80.80.80.750.750.750.750.650.650.651.90.650.650.655.150.650.650.652.90.650.650.650.650.550.550.550.550.50.50.50.50.50.50.50.5
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Common
Period End2021-04-302021-01-282020-10-302020-07-312020-04-302020-01-302019-10-312019-07-312019-04-302019-01-30
Value0.980.980.980.980.980.980.950.950.950.95
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid dei:LegalEntity, us-gaap:AwardType

bxp:BostonPropertiesLimitedPartnership, bxp:OpUnitsAndLTIPUnits


Common
Period End2021-04-302021-01-282020-10-302020-07-312020-04-302020-01-302019-10-312019-07-312019-04-302019-01-30
Value0.980.980.980.980.980.980.950.950.950.95
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxp:BostonPropertiesLimitedPartnership, bxp:UnvestedMYLTIPUnits


Common
Period End2021-04-302021-01-282020-10-302020-07-312020-04-302020-01-302019-10-312019-07-312019-04-302019-01-30
Value0.0980.0980.0980.0980.0980.0980.0950.0950.0950.095
Percentage of CommonStockDividendsPerShareCashPaid10.010.010.010.010.010.010.010.010.010.0

us-gaap:CumulativeEffectOnRetainedEarningsNetOfTax1

us-gaap:CumulativeEffectOnRetainedEarningsNetOfTax1


Cumulative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00-1679000.0000-4379000.00005496000.0000-2035000.0
Percentage of CumulativeEffectOnRetainedEarningsNetOfTax10.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:CumulativeEffectOnRetainedEarningsNetOfTax1 us-gaap:StatementEquityComponents

bxp:Capital


Cumulative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value00-1505000.0000-3934000.00004933000.0
Percentage of CumulativeEffectOnRetainedEarningsNetOfTax10.00.089.60.00.00.089.80.00.00.089.8

bxp:NoncontrollinginterestRedeemablepartnershipunits


Cumulative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value00-174000.0000-445000.0000563000.0
Percentage of CumulativeEffectOnRetainedEarningsNetOfTax10.00.010.40.00.00.010.20.00.00.010.2

us-gaap:NoncontrollingInterest


Cumulative
Period End2020-09-302020-06-302020-03-312020-01-012019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00-174000.0200000.0000-445000.0000563000.00-37000.00-1763000.0
Percentage of CumulativeEffectOnRetainedEarningsNetOfTax10.00.010.40.00.00.00.010.20.00.00.010.20.00.00.086.6

us-gaap:RetainedEarnings


Cumulative
Period End2020-09-302020-06-302020-03-312020-01-012019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00-1505000.01500000.0000-3864000.00004933000.0000-272000.0
Percentage of CumulativeEffectOnRetainedEarningsNetOfTax10.00.089.60.00.00.00.088.20.00.00.089.80.00.00.013.4

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1


Debt
Period End2021-06-15
Value0.775
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:CreditFacility

bxp:DelayedDrawFacility


Debt
Period End2021-03-31
Value0.95
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

bxp:AnnapolisJunctionBuildingSix


Debt
Period End2020-11-132020-11-122019-01-242018-11-162016-11-152013-10-29
Value2.52.00.020.020.02250.0165
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.00.00.00.00.00.0

bxp:DockSevenTwo


Debt
Period End2020-12-142020-12-13
Value2.852.25
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.00.0

bxp:MarketSquareNorth


Debt
Period End2020-10-30
Value2.3
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

bxp:MarketSquareNorth, us-gaap:SubsequentEvent


Debt
Period End2020-10-30
Value2.3
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

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

us-gaap:DebtInstrumentIncreaseAccruedInterest

bxp:BostonPropertiesLimitedPartnership, bxp:FourPointTwoEightNinePercentUnsecuredSeniorNotes, us-gaap:SeniorNotes


Debt
Period End2021-02-14
Value8700000.0
Percentage of DebtInstrumentIncreaseAccruedInterest100.0

us-gaap:DebtInstrumentIncreaseAccruedInterest dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

bxp:BostonPropertiesLimitedPartnership, bxp:FourPointTwoEightNinePercentUnsecuredSeniorNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Debt
Period End2021-02-14
Value8700000.0
Percentage of DebtInstrumentIncreaseAccruedInterest100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


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
Value18317616816617817116916517716416515715616515415215115917820315315916415316715416215715415415115413412012111111110910910911110992818183
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value182173166164176169168164175
Percentage of DepreciationAndAmortization99.098.399.098.999.098.998.998.998.8

bxp:UnconsolidatedJointVentures


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
Value33343635373225232428284414141216141414129.2049.0649.2038.8328.9519.0719.3539.4299.1679.0929.8869.7842739393942414446485050505756
Percentage of DepreciationAndAmortization18.319.321.821.521.018.714.914.214.017.417.428.59.38.97.810.89.49.08.25.96.05.75.65.85.35.95.86.05.95.96.56.320.232.632.435.338.438.241.042.743.446.354.762.370.568.4

us-gaap:DepreciationAndAmortization dei:LegalEntity, us-gaap:ConsolidationItems

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


Depreciation
Period End2021-06-302021-03-312020-06-302020-03-31
Value-182.078-173.5-176.409-169.285
Percentage of DepreciationAndAmortization-99.0-98.3-99.0-98.9

us-gaap:DepreciationAndAmortization dei:LegalEntity, us-gaap:StatementBusinessSegments

bxp:BostonPropertiesLimitedPartnership, us-gaap:IntersegmentElimination


Depreciation
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-166.266-164.706-176.409-168.055-164.02-175.199
Percentage of DepreciationAndAmortization-99.0-98.9-99.0-98.9-98.9-98.8

us-gaap:DepreciationAndAmortization us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Depreciation
Period End2021-06-302021-03-312020-06-302020-03-31
Value-183.838-176.565-178.188-171.094
Percentage of DepreciationAndAmortization-100.0-100.0-100.0-100.0

us-gaap:DepreciationAndAmortization us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Depreciation
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-168.013-166.456-178.188-171.094-169.897-165.862-177.411-164.594-165.439-157.996-156.417-165.797-154.259-152.164-151.919-159.205-178.032-203.748-153.175159164153167154162157154154151154134120121111111108109108110
Percentage of DepreciationAndAmortization-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.098.999.999.399.3

us-gaap:DirectCostsOfLeasedAndRentedPropertyOrEquipment

us-gaap:DirectCostsOfLeasedAndRentedPropertyOrEquipment


Direct
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value248257256258239262268265257257253247237240233237230228224228217219216219214221211215202206195200179172170168161157154154144139125128123124
Percentage of DirectCostsOfLeasedAndRentedPropertyOrEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DirectCostsOfLeasedAndRentedPropertyOrEquipment dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Direct
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value248257256258239262268265257
Percentage of DirectCostsOfLeasedAndRentedPropertyOrEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentDividendsOrDistributions


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value103.9729.6078.9037.4655.9170.385121.242.652.7152.3250.8160.847185.6581.0441.861130.2460.681101.9850.7154.4191.354.2420.9250.7741.4312.9933.91812121412118.972129.789.7797.6637.5454.5153.7740.9
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value103.9729.6078.9037.4655.9170.38512
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDispositionOfAssets

us-gaap:GainLossOnDispositionOfAssets


Gain
Period End2021-06-302020-06-302020-03-31
Value7.756203410
Percentage of GainLossOnDispositionOfAssets100.0100.0100.0

us-gaap:GainLossOnDispositionOfAssets dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Gain
Period End2021-06-302020-06-302020-03-31
Value7.756207419
Percentage of GainLossOnDispositionOfAssets100.0101.7102.3

us-gaap:GainLossOnDispositionOfAssets dei:LegalEntity, us-gaap:ConsolidationItems

bxp:BostonPropertiesLimitedPartnership, us-gaap:MaterialReconcilingItems


Gain
Period End2021-06-302020-06-302020-03-31
Value-7.756-207.241-419.654
Percentage of GainLossOnDispositionOfAssets-100.0-101.7-102.3

us-gaap:GainLossOnDispositionOfAssets us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Gain
Period End2021-06-302020-06-302020-03-31
Value-7.756-203.767-410.165
Percentage of GainLossOnDispositionOfAssets-100.0-100.0-100.0

us-gaap:GainLossOnDispositionOfAssets us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

bxp:CraneMeadow


Gain
Period End2020-12-16
Value5.2
Percentage of GainLossOnDispositionOfAssets0.0

us-gaap:GainLossOnSaleOfInvestments

us-gaap:GainLossOnSaleOfInvestments


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2275000.01659000.04296000.01858000.04552000.0-5445000.02177000.0106000.01165000.02969000.0-3319000.01075000.0505000.0-126000.0962000.0944000.0730000.01042000.0560000.0976000.0478000.0259000.0493000.0-1515000.0-24000.0393000.0387000.0-297000.0662000.0286000.01039000.0956000.0181000.0735000.0187000.0587000.0-186000.0801000.038000.0-860000.06000.0373000.0682000.0731000.0-678000.0200000.0
Percentage of GainLossOnSaleOfInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfInvestments dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2275000.01659000.04296000.01858000.04552000.0-5445000.02177000.0106000.0
Percentage of GainLossOnSaleOfInvestments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes

us-gaap:GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes


Gain
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-0.209203410-0.057-0.0151.686-0.905597.86318960.8722.8913.7670.1330.0120.067811990.095126410.00.0
Percentage of GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.00.00.0

us-gaap:GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes dei:LegalEntity

bxp:BostonPropertiesLimitedPartnership


Gain
Period End2020-09-302020-06-302019-09-302019-06-30
Value-0.209207-0.0151.835</