v3.5.0.2

Acquisitions and Dispositions (Narrative) (Details)	3 Months Ended		9 Months Ended
Acquisitions and Dispositions (Narrative) (Details)	Sep. 30, 2016 USD ($) buildings	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) buildings	Sep. 30, 2015 USD ($)
Number Of Real Estate Properties Acquired \| buildings	2		2
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			8 years 10 months 24 days
Operating Leases, Income Statement, Lease Revenue	$ 206,848,000	$ 200,938,000	$ 609,171,000	$ 617,549,000
Operating Income (Loss)	152,453,000	119,703,000	380,377,000	389,169,000
Property, Plant, and Equipment, Fair Value Disclosure	72,824,000		72,824,000
Gain on dissolution of unconsolidated company	0	0	30,697,000	0
Promote income	$ 2,212,000	$ 0	$ 26,299,000	$ 0
Duke Realty Limited Partnership [Member]
Number Of Real Estate Properties Acquired \| buildings	1		1
Property, Plant, and Equipment, Fair Value Disclosure	$ 63,000,000		$ 63,000,000
Proceeds from Equity Method Investment, Dividends or Distributions			2,760,000
Equity Method Investments	$ (35,063,000)		(35,063,000)
Gain on dissolution of unconsolidated company			30,697,000
Other 2016 Acquisitions [Member]
Operating Leases, Income Statement, Lease Revenue			2,100,000
Operating Income (Loss)			$ (28,000)
Gramercy Property Trust [Member]
Number of Real Estate Properties \| buildings	7		7
Duke/Hulfish LLC [Member]
Number of Real Estate Properties \| buildings	8		8
Duke/Hulfish LLC [Member]
Equity Method Investment, Ownership Percentage	20.00%		20.00%

Gain on dissolution of unconsolidated company

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- Definition

The number of real estate properties, by acquisition, product type, or geographic location, acquired during the reporting period.

+ References

No definition available.

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
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Amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The number of real estate properties owned as of the balance sheet date.

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The net result for the period of deducting operating expenses from operating revenues.

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The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

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Amount of revenue recognized from investments in real estate partnerships and variable interest entities.

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DUKE REALTY LIMITED PARTNERSHIP/ 10-Q