Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues:
Rental and related revenue	$ 213,107	$ 192,093	$ 423,072	$ 385,549
General contractor and service fee revenue	23,919	18,465	78,883	59,566
Revenues, total	237,026	210,558	501,955	445,115
Expenses:
Rental expenses	17,597	16,377	38,265	36,290
Real estate taxes	32,375	31,196	64,817	62,342
General contractor and other services expenses	23,189	15,253	75,775	55,662
Depreciation and amortization	83,004	75,832	158,996	153,361
Costs and expenses, total	156,165	138,658	337,853	307,655
Other operating activities:
Equity in earnings of unconsolidated joint ventures	4,143	1,682	8,858	9,969
Gain on sale of properties	30,592	149,962	30,429	194,848
Gain on land sales	1,950	357	2,700	3,306
Other operating expenses	(1,518)	(1,529)	(3,641)	(2,798)
Non-incremental costs related to successful leases	(3,447)	0	(5,603)	0
General and administrative expenses	(13,420)	(13,459)	(35,403)	(34,482)
Other Operating Activities, Net	18,300	137,013	(2,660)	170,843
Operating income	99,161	208,913	161,442	308,303
Other income (expenses):
Interest and other income, net	2,534	4,727	5,292	9,190
Interest expense	(23,510)	(20,675)	(45,642)	(40,675)
Loss on debt extinguishment	0	(151)	(13)	(151)
Gain on involuntary conversion	0	0	2,259	0
Income from continuing operations before income taxes	78,185	192,814	123,338	276,667
Income tax expense	(6,616)	(63)	(7,001)	(10,392)
Income from continuing operations	71,569	192,751	116,337	266,275
Discontinued operations:
Income before gain on sales and income tax	0	31	0	23
Gain on sale of properties	99	2,889	254	3,021
Income from discontinued operations	99	2,920	254	3,044
Net income	71,668	195,671	116,591	269,319
Net income attributable to noncontrolling interests	(615)	(1,826)	(987)	(2,511)
Net income attributable to common shareholders	$ 71,053	$ 193,845	$ 115,604	$ 266,808
Basic net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.20	$ 0.53	$ 0.32	$ 0.74
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0.01	0	0.01
Earnings Per Share, Basic	0.20	0.54	0.32	0.75
Diluted net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.20	0.53	0.32	0.73
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0.01	0	0.01
Earnings Per Share, Diluted	$ 0.20	$ 0.54	$ 0.32	$ 0.74
Weighted average number of common shares/units outstanding	359,681	357,054	359,412	356,898
Weighted average number of common shares/units and potential dilutive securities	362,926	362,741	362,615	362,551
Comprehensive income:
Net income	$ 71,668	$ 195,671	$ 116,591	$ 269,319
Other comprehensive loss:
Unrealized losses on interest rate swap contracts	(14,699)	0	(24,041)	0
Comprehensive income	56,969	195,671	92,550	269,319
Duke Realty Limited Partnership [Member]
Revenues:
Rental and related revenue	213,107	192,093	423,072	385,549
General contractor and service fee revenue	23,919	18,465	78,883	59,566
Revenues, total	237,026	210,558	501,955	445,115
Expenses:
Rental expenses	17,597	16,377	38,265	36,290
Real estate taxes	32,375	31,196	64,817	62,342
General contractor and other services expenses	23,189	15,253	75,775	55,662
Depreciation and amortization	83,004	75,832	158,996	153,361
Costs and expenses, total	156,165	138,658	337,853	307,655
Other operating activities:
Equity in earnings of unconsolidated joint ventures	4,143	1,682	8,858	9,969
Gain on sale of properties	30,592	149,962	30,429	194,848
Gain on land sales	1,950	357	2,700	3,306
Other operating expenses	(1,518)	(1,529)	(3,641)	(2,798)
Non-incremental costs related to successful leases	(3,447)	0	(5,603)	0
General and administrative expenses	(13,420)	(13,459)	(35,403)	(34,482)
Other Operating Activities, Net	18,300	137,013	(2,660)	170,843
Operating income	99,161	208,913	161,442	308,303
Other income (expenses):
Interest and other income, net	2,534	4,727	5,292	9,190
Interest expense	(23,510)	(20,675)	(45,642)	(40,675)
Loss on debt extinguishment	0	(151)	(13)	(151)
Gain on involuntary conversion	0	0	2,259	0
Income from continuing operations before income taxes	78,185	192,814	123,338	276,667
Income tax expense	(6,616)	(63)	(7,001)	(10,392)
Income from continuing operations	71,569	192,751	116,337	266,275
Discontinued operations:
Income before gain on sales and income tax	0	31	0	23
Gain on sale of properties	99	2,889	254	3,021
Income from discontinued operations	99	2,920	254	3,044
Net income	71,668	195,671	116,591	269,319
Net loss (income) attributable to noncontrolling interests	6	(2)	16	(4)
Net income attributable to common shareholders	$ 71,674	$ 195,669	$ 116,607	$ 269,315
Basic net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	$ 0.20	$ 0.53	$ 0.32	$ 0.74
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0.01	0	0.01
Earnings Per Share, Basic	0.20	0.54	0.32	0.75
Diluted net income per common share/unit:
Continuing operations attributable to common shareholders/unitholders	0.20	0.53	0.32	0.73
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0.01	0	0.01
Earnings Per Share, Diluted	$ 0.20	$ 0.54	$ 0.32	$ 0.74
Weighted average number of common shares/units outstanding	362,826	360,447	362,517	360,272
Weighted average number of common shares/units and potential dilutive securities	362,926	362,741	362,615	362,551
Comprehensive income:
Net income	$ 71,668	$ 195,671	$ 116,591	$ 269,319
Other comprehensive loss:
Unrealized losses on interest rate swap contracts	(14,699)	0	(24,041)	0
Comprehensive income	$ 56,969	$ 195,671	$ 92,550	$ 269,319