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v3.22.1

Segment Information Narrative (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 USD ($)
Parking and Other [Member] |
Segment Reporting Information [Line Items] |
Increase (decrease) in parking and other revenue primarily related to COVID-19 | $ 4,800

X
- Definition Increase (decrease) in parking and other revenue primarily related to COVID-19 + References No definition available. + Details
Name: | bxp_IncreaseDecreaseInParkingAndOtherRevenuePrimarilyRelatedToCOVID19
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=bxp_ParkingandOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |