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

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=dre_MidwestIndustrialSaleMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=dre_SuburbanOfficeTransactionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=dre_TenderOfferMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_DividendDeclaredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended	3 Months Ended
	Mar. 31, 2015 buildings	Dec. 31, 2014 buildings	Jun. 30, 2015 sqft buildings acre	Apr. 01, 2015 acre	Apr. 03, 2015
Subsequent Event [Line Items]
Number of Real Estate Properties Sold	12dre_NumberofRealEstatePropertiesSold	29dre_NumberofRealEstatePropertiesSold
Suburban Office Transaction [Member]
Subsequent Event [Line Items]
Sales Price				$ 1,100.0
Square Footage Of Real Estate Properties Acquired Or Disposed			6,700,000
Number of Real Estate Properties Sold			61
acres of land sold				57
Midwest Industrial Sale[Member] [Member]
Subsequent Event [Line Items]
Sales Price				270.0
Square Footage Of Real Estate Properties Acquired Or Disposed			5,200,000
Number of Real Estate Properties Sold			51
Declaration of Dividends [Member] \| Common Stock [Member]
Subsequent Event [Line Items]
Common stock dividends declared per share			$ 0.17
Record date			May 14, 2015
Payment date			May 29, 2015
Tender Offer [Member]
Subsequent Event [Line Items]
Debt Instrument, Repurchase Amount					500.0
Debt Instrument, Repurchased Face Amount					424.9
Maximum [Member] \| Tender Offer [Member]
Subsequent Event [Line Items]
Debt Instrument, Repurchase Amount					$ 500.0