XML 114 R90.htm IDEA: XBRL DOCUMENT
v3.22.4

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - MAP Venture (Details) - MAP Venture $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) ft² property
Schedule of Equity Method Investments [Line Items] |
Ground lease annual payments | $ | $ 11.9
Ground lease annual rent expense increase percentage through November 2025 | 2.50%
Ground lease annual rent expense increase after November 2025 | 2.50%
Variable Interest Entity, Not Primary Beneficiary |
Schedule of Equity Method Investments [Line Items] |
Number of office properties owned | property | 58
Rentable square feet | ft² | 3,924,783

X
- Definition Ground lease annual payments. + References No definition available. + Details
Name: | bdn_GroundLeaseAnnualPayments
Namespace Prefix: | bdn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Ground lease annual rent expense increase percentage for first ten years. + References No definition available. + Details
Name: | bdn_GroundLeaseAnnualRentExpenseIncreasePercentageForFirstTenYears
Namespace Prefix: | bdn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ground lease annual rent expense increase percentage, thereafter. + References No definition available. + Details
Name: | bdn_GroundLeaseAnnualRentExpenseIncreasePercentageThereafter
Namespace Prefix: | bdn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of office properties owned. + References No definition available. + Details
Name: | bdn_NumberOfOfficePropertiesOwned
Namespace Prefix: | bdn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- 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

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

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=bdn_MAPVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |