Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 861,618	$ 302,760	$ 432,644
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	304,935	297,158	272,422
Amortization of Other Deferred Charges	57,213	55,855	54,801
Amortization of deferred financing costs	9,735	9,155	6,536
Straight-line rental income and expense, net	(32,081)	(25,865)	(21,197)
Impairment charges	0	5,626	0
Loss on debt extinguishment	17,901	32,900	6,320
Gain (Loss) on Involuntary Conversion	(3,222)	(4,312)	(2,259)
Gain on land and property sales	(598,602)	(138,269)	(242,543)
Third-party construction contracts, net	(6,269)	(2,511)	9,254
Other accrued revenues and expenses, net	48,194	29,333	8,476
Equity in earnings (in excess of) less than operating distributions received from unconsolidated joint ventures	(16,996)	4,606	(18,556)
Net cash provided by operating activities	642,426	566,436	505,898
Cash flows from investing activities:
Development of real estate investments	(661,416)	(573,544)	(446,801)
Payments to Acquire Commercial Real Estate	(447,584)	(383,672)	(210,224)
Acquisition of land and other real estate assets	(700,632)	(248,413)	(388,202)
Second generation tenant improvements, leasing costs and building improvements	(68,445)	(45,037)	(53,137)
Other deferred leasing costs	(42,214)	(41,607)	(32,921)
Other assets	(19,067)	(4,868)	(10,777)
Proceeds from the repayments of notes receivable from property sales	0	110,000	162,550
Proceeds from land and property sales, net	1,067,967	336,255	432,662
Capital distributions from unconsolidated joint ventures	61,616	876	26,272
Capital contributions and advances to unconsolidated joint ventures	(22,640)	(6,211)	(34,496)
Net cash used for investing activities	(832,415)	(856,221)	(555,074)
Cash flows from financing activities:
Proceeds from issuance of common shares, net	406,576	187,856	272,761
Proceeds from unsecured debt	940,749	663,123	582,284
Payments on unsecured debt	(390,900)	(546,972)	(255,812)
Proceeds from secured debt financings	0	18,400	0
Payments on secured indebtedness including principal amortization	(4,413)	(13,457)	(45,515)
(Repayments) borrowings on line of credit, net	(295,000)	295,000	(30,000)
Distributions to common shareholders	(394,487)	(355,287)	(318,702)
Distributions to noncontrolling interests, net	(4,352)	(3,347)	(2,648)
Tax payments on stock-based compensation awards	(5,132)	(4,360)	(6,825)
Change in book overdrafts	(12,453)	1,941	138
Cash settlement of interest rate swaps	0	0	(35,569)
Other financing activities	(357)	163	(10,183)
Deferred financing costs	(14,262)	(7,483)	(4,839)
Redemption of Limited Partnership Units	(39)	0	0
Net cash provided by financing activities	225,930	235,577	145,090
Net increase (decrease) in cash, cash equivalents and restricted cash	35,941	(54,208)	95,914
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning Balance	67,223	121,431	25,517
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	103,164	67,223	121,431
Non-cash investing and financing activities:
Lease liabilities arising from right-of-use assets	19,822	20,883	40,467
Assumption of indebtedness and other liabilities in real estate acquisitions	128,639	39,966	0
Non-cash distribution of assets from unconsolidated joint ventures, net	11,124	0	0
Contribution of properties to unconsolidated joint venture	74,942	0	0
Conversion of Limited Partner Units to common shares	5,099	0	1,624
Issuance of Limited Partner Units for acquisition	11,603	0	0
Duke Realty Limited Partnership [Member]
Cash flows from operating activities:
Net income	861,618	302,760	432,644
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	304,935	297,158	272,422
Amortization of Other Deferred Charges	57,213	55,855	54,801
Amortization of deferred financing costs	9,735	9,155	6,536
Straight-line rental income and expense, net	(32,081)	(25,865)	(21,197)
Impairment charges	0	5,626	0
Loss on debt extinguishment	17,901	32,900	6,320
Gain (Loss) on Involuntary Conversion	(3,222)	(4,312)	(2,259)
Gain on land and property sales	(598,602)	(138,269)	(242,543)
Third-party construction contracts, net	(6,269)	(2,511)	9,254
Other accrued revenues and expenses, net	48,194	29,333	8,476
Equity in earnings (in excess of) less than operating distributions received from unconsolidated joint ventures	(16,996)	4,606	(18,556)
Net cash provided by operating activities	642,426	566,436	505,898
Cash flows from investing activities:
Development of real estate investments	(661,416)	(573,544)	(446,801)
Payments to Acquire Commercial Real Estate	(447,584)	(383,672)	(210,224)
Acquisition of land and other real estate assets	(700,632)	(248,413)	(388,202)
Second generation tenant improvements, leasing costs and building improvements	(68,445)	(45,037)	(53,137)
Other deferred leasing costs	(42,214)	(41,607)	(32,921)
Other assets	(19,067)	(4,868)	(10,777)
Proceeds from the repayments of notes receivable from property sales	0	110,000	162,550
Proceeds from land and property sales, net	1,067,967	336,255	432,662
Capital distributions from unconsolidated joint ventures	61,616	876	26,272
Capital contributions and advances to unconsolidated joint ventures	(22,640)	(6,211)	(34,496)
Net cash used for investing activities	(832,415)	(856,221)	(555,074)
Cash flows from financing activities:
Contributions from the General Partner	406,576	187,856	272,761
Proceeds from unsecured debt	940,749	663,123	582,284
Payments on unsecured debt	(390,900)	(546,972)	(255,812)
Proceeds from secured debt financings	0	18,400	0
Payments on secured indebtedness including principal amortization	(4,413)	(13,457)	(45,515)
(Repayments) borrowings on line of credit, net	(295,000)	295,000	(30,000)
Distributions to common shareholders	(398,399)	(358,484)	(321,469)
Distributions to noncontrolling interests, net	(440)	(150)	119
Tax payments on stock-based compensation awards	(5,132)	(4,360)	(6,825)
Change in book overdrafts	(12,453)	1,941	138
Cash settlement of interest rate swaps	0	0	(35,569)
Other financing activities	(357)	163	(10,183)
Deferred financing costs	(14,262)	(7,483)	(4,839)
Redemption of Limited Partnership Units	(39)	0	0
Net cash provided by financing activities	225,930	235,577	145,090
Net increase (decrease) in cash, cash equivalents and restricted cash	35,941	(54,208)	95,914
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning Balance	67,223	121,431	25,517
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	103,164	67,223	121,431
Non-cash investing and financing activities:
Lease liabilities arising from right-of-use assets	19,822	20,883	40,467
Assumption of indebtedness and other liabilities in real estate acquisitions	128,639	39,966	0
Non-cash distribution of assets from unconsolidated joint ventures, net	11,124	0	0
Contribution of properties to unconsolidated joint venture	74,942	0	0
Conversion of Limited Partner Units to common shares	5,099	0	1,624
Issuance of Limited Partner Units for acquisition	$ 11,603	$ 0	$ 0