Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Rental and related revenue	$ 215,374	$ 196,912	$ 638,446	$ 582,461
General contractor and service fee revenue	25,955	34,986	104,838	94,552
Revenues, total	241,329	231,898	743,284	677,013
Expenses:
Rental expenses	19,158	17,268	57,423	53,558
Real estate taxes	31,739	31,515	96,556	93,857
General contractor and other services expenses	23,640	33,730	99,415	89,392
Depreciation and amortization	83,924	78,855	242,920	232,216
Costs and expenses, total	158,461	161,368	496,314	469,023
Other operating activities:
Equity in earnings of unconsolidated joint ventures	3,736	5,552	12,594	15,521
Gain on sale of properties	173,646	(107)	204,075	194,741
Gain on land sales	3,869	3,915	6,569	7,221
Other operating expenses	(874)	(1,104)	(4,515)	(3,902)
Non-incremental costs related to successful leases	(1,123)	0	(6,726)	0
General and administrative expenses	(13,720)	(8,959)	(49,123)	(43,441)
Other Operating Activities, Net	165,534	(703)	162,874	170,140
Operating income	248,402	69,827	409,844	378,130
Other income (expenses):
Interest and other income, net	2,085	4,129	7,377	13,319
Interest expense	(22,604)	(21,462)	(68,246)	(62,137)
Loss on debt extinguishment	0	(89)	(13)	(240)
Gain on involuntary conversion	0	0	2,259	0
Income from continuing operations before income taxes	227,883	52,405	351,221	329,072
Income tax benefit (expense)	536	897	(6,465)	(9,495)
Income from continuing operations	228,419	53,302	344,756	319,577
Discontinued operations:
Income before gain on sales and income tax	0	85	0	108
Gain on sale of properties	112	136	366	3,157
Income from discontinued operations	112	221	366	3,265
Net income	228,531	53,523	345,122	322,842
Net income attributable to noncontrolling interests	(1,965)	(498)	(2,952)	(3,009)
Net income attributable to common shareholders	$ 226,566	$ 53,025	$ 342,170	$ 319,833
Basic net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.62	$ 0.15	$ 0.95	$ 0.88
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0	0	0.01
Earnings Per Share, Basic	0.62	0.15	0.95	0.89
Diluted net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.62	0.15	0.94	0.88
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0	0	0.01
Earnings Per Share, Diluted	$ 0.62	$ 0.15	$ 0.94	$ 0.89
Weighted average number of common shares/units outstanding	362,416	357,898	360,424	357,235
Weighted average number of common shares/units and potential dilutive securities	367,271	361,410	365,343	362,745
Comprehensive income:
Net income	$ 228,531	$ 53,523	$ 345,122	$ 322,842
Other comprehensive loss:
Unrealized losses on interest rate swap contracts	(13,387)	0	(37,428)	0
Comprehensive income	215,144	53,523	307,694	322,842
Duke Realty Limited Partnership [Member]
Revenues:
Rental and related revenue	215,374	196,912	638,446	582,461
General contractor and service fee revenue	25,955	34,986	104,838	94,552
Revenues, total	241,329	231,898	743,284	677,013
Expenses:
Rental expenses	19,158	17,268	57,423	53,558
Real estate taxes	31,739	31,515	96,556	93,857
General contractor and other services expenses	23,640	33,730	99,415	89,392
Depreciation and amortization	83,924	78,855	242,920	232,216
Costs and expenses, total	158,461	161,368	496,314	469,023
Other operating activities:
Equity in earnings of unconsolidated joint ventures	3,736	5,552	12,594	15,521
Gain on sale of properties	173,646	(107)	204,075	194,741
Gain on land sales	3,869	3,915	6,569	7,221
Other operating expenses	(874)	(1,104)	(4,515)	(3,902)
Non-incremental costs related to successful leases	(1,123)	0	(6,726)	0
General and administrative expenses	(13,720)	(8,959)	(49,123)	(43,441)
Other Operating Activities, Net	165,534	(703)	162,874	170,140
Operating income	248,402	69,827	409,844	378,130
Other income (expenses):
Interest and other income, net	2,085	4,129	7,377	13,319
Interest expense	(22,604)	(21,462)	(68,246)	(62,137)
Loss on debt extinguishment	0	(89)	(13)	(240)
Gain on involuntary conversion	0	0	2,259	0
Income from continuing operations before income taxes	227,883	52,405	351,221	329,072
Income tax benefit (expense)	536	897	(6,465)	(9,495)
Income from continuing operations	228,419	53,302	344,756	319,577
Discontinued operations:
Income before gain on sales and income tax	0	85	0	108
Gain on sale of properties	112	136	366	3,157
Income from discontinued operations	112	221	366	3,265
Net income	228,531	53,523	345,122	322,842
Net loss (income) attributable to noncontrolling interests	3	(3)	19	(7)
Net income attributable to common shareholders	$ 228,534	$ 53,520	$ 345,141	$ 322,835
Basic net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.62	$ 0.15	$ 0.95	$ 0.88
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0	0	0.01
Earnings Per Share, Basic	0.62	0.15	0.95	0.89
Diluted net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.62	0.15	0.94	0.88
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0	0	0.01
Earnings Per Share, Diluted	$ 0.62	$ 0.15	$ 0.94	$ 0.89
Weighted average number of common shares/units outstanding	365,558	361,200	363,542	360,585
Weighted average number of common shares/units and potential dilutive securities	367,271	361,410	365,343	362,745
Comprehensive income:
Net income	$ 228,531	$ 53,523	$ 345,122	$ 322,842
Other comprehensive loss:
Unrealized losses on interest rate swap contracts	(13,387)	0	(37,428)	0
Comprehensive income	$ 215,144	$ 53,523	$ 307,694	$ 322,842