Name:	bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears
Namespace Prefix:	bxp_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Net rentable area for properties owned.

+ References

No definition available.

+ Details

Name:	us-gaap_NetRentableArea
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ConstructionInProgressMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_RetailSiteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_ApartmentBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_HotelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=bxp_BostonPropertiesLimitedPartnershipMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Organization (Details) ft² in Millions		12 Months Ended
Organization (Details) ft² in Millions	Dec. 31, 2021	Dec. 31, 2022 ft² Real_Estate_Properties yr shares
Real Estate Properties [Line Items]
Restriction on redemption of OP units from date of issuance (years) \| yr		1
One OP unit is equivalent to one share of Common Stock (in shares) \| shares		1
OP unit conversion rate (in shares) \| shares		1
Number of VIEs		7
Variable Interest Entity, Primary Beneficiary [Member]
Real Estate Properties [Line Items]
Number of VIEs		6
Variable Interest Entity, Primary Beneficiary [Member] \| Commercial Real Estate Properties [Member]
Real Estate Properties [Line Items]
Number of VIEs		5
Construction in Progress
Real Estate Properties [Line Items]
Number of real estate properties		13
Net Rentable Area (in sf) \| ft²		3.2
Commercial Real Estate Properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties		194
Net Rentable Area (in sf) \| ft²		54.1
Office Building [Member]
Real Estate Properties [Line Items]
Number of real estate properties		173
Office Building [Member] \| Construction in Progress
Real Estate Properties [Line Items]
Number of real estate properties		10
Retail Site [Member]
Real Estate Properties [Line Items]
Number of real estate properties		14
Retail Site [Member] \| Construction in Progress
Real Estate Properties [Line Items]
Number of real estate properties		2
Residential Building
Real Estate Properties [Line Items]
Number of real estate properties		6
Residential Building \| Construction in Progress
Real Estate Properties [Line Items]
Number of real estate properties		1
Hotel [Member]
Real Estate Properties [Line Items]
Number of real estate properties		1
Boston Properties Limited Partnership
Real Estate Properties [Line Items]
General and limited partnership interest in the operating partnership (percent)	89.70%	89.60%