Selected Quarterly Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Rental and related revenue	$ 217,387	$ 215,374	$ 213,107	$ 209,965	$ 202,858	$ 196,912	$ 192,093	$ 193,456	$ 855,833	$ 785,319	$ 686,514
General contractor and service fee revenue	13,088	25,955	23,919	54,964	67,999	34,986	18,465	41,101	117,926	162,551	94,420
Net Income (Loss) Available to Common Stockholders, Basic	$ 86,802	$ 226,566	$ 71,053	$ 44,551	$ 63,896	$ 53,025	$ 193,845	$ 72,963	$ 428,972	$ 383,729	$ 1,634,431
Earnings Per Share, Basic	$ 0.24	$ 0.62	$ 0.20	$ 0.12	$ 0.18	$ 0.15	$ 0.54	$ 0.20	$ 1.18	$ 1.07	$ 4.58
Earnings Per Share, Diluted	$ 0.23	$ 0.62	$ 0.20	$ 0.12	$ 0.18	$ 0.15	$ 0.54	$ 0.20	$ 1.18	$ 1.07	$ 4.56
Weighted average number of common shares/units outstanding	367,603	362,416	359,681	359,139	358,561	357,898	357,054	356,740	362,234	357,569	355,762
Weighted average number of common shares/units and potential dilutive securities	372,464	367,271	362,926	362,362	362,536	361,410	362,741	360,400	367,339	363,297	362,011
Duke Realty Limited Partnership [Member]
Rental and related revenue									$ 855,833	$ 785,319	$ 686,514
General contractor and service fee revenue									117,926	162,551	94,420
Net Income (Loss) Available to Common Stockholders, Basic	$ 87,509	$ 228,534	$ 71,674	$ 44,933	$ 64,422	$ 53,520	$ 195,669	$ 73,646	$ 432,650	$ 387,257	$ 1,649,607
Earnings Per Share, Basic	$ 0.24	$ 0.62	$ 0.20	$ 0.12	$ 0.18	$ 0.15	$ 0.54	$ 0.20	$ 1.18	$ 1.07	$ 4.58
Earnings Per Share, Diluted	$ 0.23	$ 0.62	$ 0.20	$ 0.12	$ 0.18	$ 0.15	$ 0.54	$ 0.20	$ 1.18	$ 1.07	$ 4.56
Weighted average number of common shares/units outstanding	370,725	365,558	362,826	362,204	361,672	361,200	360,447	360,095	365,352	360,859	359,065
Weighted average number of common shares/units and potential dilutive securities	372,464	367,271	362,926	362,362	362,536	361,410	362,741	360,400	367,339	363,297	362,011