Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 267,098	$ 597,342
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	191,554	192,135
Amortization of deferred leasing and other costs	47,093	51,517
Amortization of deferred financing costs	3,998	5,543
Straight-line rental income and expense, net	(10,832)	(18,498)
Impairment charges	15,098	7,896
Loss on debt extinguishment	8,673	82,589
Gain on dissolution of unconsolidated company	(30,697)	0
Gains on land and depreciated property sales	(140,512)	(644,044)
Third-party construction contracts, net	5,601	(3,805)
Other accrued revenues and expenses, net	14,773	7,129
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(24,476)	414
Net cash provided by operating activities	347,371	278,218
Cash flows from investing activities:
Development of real estate investments	(308,199)	(221,201)
Acquisition of real estate investments and related intangible assets	(16,029)	(28,849)
Acquisition of undeveloped land	(77,593)	(39,881)
Second generation tenant improvements, leasing costs and building improvements	(39,169)	(45,688)
Other deferred leasing costs	(25,949)	(26,940)
Other assets	164,450	(38,104)
Proceeds from land and depreciated property sales, net	369,118	1,534,177
Capital distributions from unconsolidated companies	52,514	68,915
Capital contributions and advances to unconsolidated companies	(54,853)	(55,020)
Net cash provided by investing activities	64,290	1,147,409
Cash flows from financing activities:
Proceeds from issuance of common shares, net	217,513	4,592
Proceeds from Issuance of Unsecured Debt	375,000	0
Payments on unsecured debt	(285,339)	(759,948)
Payments on secured indebtedness including principal amortization	(352,723)	(221,085)
Repayments of line of credit, net	(71,000)	(106,000)
Distributions to common shareholders/unitholders	(187,885)	(175,967)
Contributions from (distributions to) Noncontrolling Interest, Net	(1,955)	(1,403)
Change in book overdrafts	(11,025)	(7,754)
Deferred financing costs	(6,569)	(110)
Net cash used for financing activities	(323,983)	(1,267,675)
Net increase in cash and cash equivalents	87,678	157,952
Cash and cash equivalents at beginning of period	22,533	17,922
Cash and cash equivalents at end of period	110,211	175,874
Noncash investing and financing activities:
Mortgage notes receivable from buyers in property sales	1,685	204,428
Conversion of Limited Partner Units to common shares	1,015	2,416
Duke Realty Limited Partnership [Member]
Cash flows from operating activities:
Net income	267,098	597,342
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	191,554	192,135
Amortization of deferred leasing and other costs	47,093	51,517
Amortization of deferred financing costs	3,998	5,543
Straight-line rental income and expense, net	(10,832)	(18,498)
Impairment charges	15,098	7,896
Loss on debt extinguishment	8,673	82,589
Gain on dissolution of unconsolidated company	(30,697)	0
Gains on land and depreciated property sales	(140,512)	(644,044)
Third-party construction contracts, net	5,601	(3,805)
Other accrued revenues and expenses, net	14,773	6,949
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(24,476)	414
Net cash provided by operating activities	347,371	278,038
Cash flows from investing activities:
Development of real estate investments	(308,199)	(221,201)
Acquisition of real estate investments and related intangible assets	(16,029)	(28,849)
Acquisition of undeveloped land	(77,593)	(39,881)
Second generation tenant improvements, leasing costs and building improvements	(39,169)	(45,688)
Other deferred leasing costs	(25,949)	(26,940)
Other assets	164,450	(38,104)
Proceeds from land and depreciated property sales, net	369,118	1,534,177
Capital distributions from unconsolidated companies	52,514	68,915
Capital contributions and advances to unconsolidated companies	(54,853)	(55,020)
Net cash provided by investing activities	64,290	1,147,409
Cash flows from financing activities:
Contributions from the General Partner	217,513	4,772
Proceeds from Issuance of Unsecured Debt	375,000	0
Payments on unsecured debt	(285,339)	(759,948)
Payments on secured indebtedness including principal amortization	(352,723)	(221,085)
Repayments of line of credit, net	(71,000)	(106,000)
Distributions to common shareholders/unitholders	(189,764)	(177,815)
Contributions from (distributions to) Noncontrolling Interest, Net	(76)	445
Change in book overdrafts	(11,025)	(7,754)
Deferred financing costs	(6,569)	(110)
Net cash used for financing activities	(323,983)	(1,267,495)
Net increase in cash and cash equivalents	87,678	157,952
Cash and cash equivalents at beginning of period	22,533	17,922
Cash and cash equivalents at end of period	110,211	175,874
Noncash investing and financing activities:
Mortgage notes receivable from buyers in property sales	1,685	204,428
Conversion of Limited Partner Units to common shares	$ 1,015	$ 2,416