XML 76 R70.htm IDEA: XBRL DOCUMENT  v2.3.0.11

Non-Controlling Interests in The Parent Company (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Non-Controlling Interests in the Parent Company (Textuals) [Abstract]
Aggregate amount related to non-controlling interests classified within equity	$ 123.4	$ 128.3
Settlement value of non controlling interest in operating partnership	$ 113.7	$ 115.4

X

- Definition

Non-Controlling Interests In The Parent Company.

+ Details

Name:	bdn_NonControllingInterestsInParentCompanyTextualsAbstract
Namespace Prefix:	bdn
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Settlement value of non controlling interest in operating partnership.

+ Details

Name:	bdn_SettlementValueOfNonControllingInterestInOperatingPartnership
Namespace Prefix:	bdn
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Carrying amount of the equity interests owned by noncontrolling partners in an operating partnership included in the entity's consolidated financial statements.

+ Details

Name:	us-gaap_MinorityInterestInOperatingPartnerships
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant