XML 112 R88.htm IDEA: XBRL DOCUMENT
v3.22.4

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - Commerce Square Venture (Details) | Dec. 31, 2022 property | Dec. 21, 2020 ft² | Jul. 21, 2020 ft² property
--- | --- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |  |
Sale of ownership interest percentage |  | 60.00% |
Number of real estate properties | 77 |  |
Commerce Square |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership percentage | 70.00% |  |
Commerce Square | Preferred Equity Securities |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership percentage | 32.00% |  |
Commerce Square | Common Equity Securities |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership percentage | 38.00% |  |
Commerce Square |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Sale of ownership interest percentage |  |  | 30.00%
Commerce Square | Office Properties |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Number of real estate properties |  |  | 2
Rentable square feet | ft² |  | 1,896,142 | 1,896,142

X
- Definition Sale of ownership interest percentage. + References No definition available. + Details
Name: | bdn_SaleOfOwnershipInterestPercentage
Namespace Prefix: | bdn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
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 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

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_OneandTwoCommerceSquareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=bdn_PreferredEquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=bdn_CommonEquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=bdn_OneandTwoCommerceSquareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OfficeBuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |