Name:	dre_MaximumLossExposureFromInvestmentInUnconsolidatedVies
Namespace Prefix:	dre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Number of Unconsolidated Joint Ventures Considered Variable Interest Entities

No definition available.

Name:	dre_NumberOfUnconsolidatedJointVenturesConsideredVariableInterestEntities
Namespace Prefix:	dre_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

Variable interest entity carrying amount of assets nonconsolidated VIE

No definition available.

Name:	dre_VariableInterestEntityCarryingAmountOfAssetsNonconsolidatedVie
Namespace Prefix:	dre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5728-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5747-111685

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS140-4/FIN46(R)

-Paragraph C6

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Carrying amount of the liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.