Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 153,939	$ 520,134
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	126,594	128,624
Amortization of deferred leasing and other costs	31,365	35,130
Amortization of deferred financing costs	2,608	3,835
Straight-line rental income and expense, net	(5,768)	(12,775)
Impairment charges	12,056	5,470
Gains (Losses) on Extinguishment of Debt	2,430	82,653
Gain on dissolution of unconsolidated company	(30,697)	0
Accrued promote income	(24,087)	0
Gains on land and depreciated property sales	(55,894)	(571,060)
Third-party construction contracts, net	723	4,956
Other accrued revenues and expenses, net	(5,817)	(11,924)
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(16,080)	(9,391)
Net cash provided by operating activities	191,372	175,652
Cash flows from investing activities:
Development of real estate investments	(213,262)	(109,617)
Acquisition of real estate investments and related intangible assets	(16,029)	(20,929)
Acquisition of undeveloped land	(27,243)	(25,579)
Second generation tenant improvements, leasing costs and building improvements	(30,237)	(30,871)
Other deferred leasing costs	(14,993)	(22,302)
Other assets	182,996	(94,745)
Proceeds from land and depreciated property sales, net	174,882	1,305,794
Capital distributions from unconsolidated companies	36,328	67,004
Capital contributions and advances to unconsolidated companies	(50,955)	(50,208)
Net cash provided by investing activities	41,487	1,018,547
Cash flows from financing activities:
Proceeds from issuance of common shares, net	99,844	4,756
Proceeds from Issuance of Unsecured Debt	375,000	0
Payments on unsecured debt	(75,668)	(759,354)
Payments on secured indebtedness including principal amortization	(348,743)	(207,169)
Repayments of line of credit, net	(71,000)	(106,000)
Distributions to common shareholders/unitholders	(124,651)	(117,274)
Distributions to Noncontrolling Interest, Net	(1,304)	(1,394)
Change in book overdrafts	(10,974)	(5,322)
Deferred financing costs	(6,196)	(110)
Net cash used for financing activities	(163,692)	(1,191,867)
Net increase in cash and cash equivalents	69,167	2,332
Cash and cash equivalents at beginning of period	22,533	17,922
Cash and cash equivalents at end of period	91,700	20,254
Noncash investing and financing activities:
Mortgage notes receivable from buyers in property sales	1,685	200,000
Conversion of Limited Partner Units to common shares	185	(1,693)
Duke Realty Limited Partnership [Member]
Cash flows from operating activities:
Net income	153,939	520,134
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	126,594	128,624
Amortization of deferred leasing and other costs	31,365	35,130
Amortization of deferred financing costs	2,608	3,835
Straight-line rental income and expense, net	(5,768)	(12,775)
Impairment charges	12,056	5,470
Gains (Losses) on Extinguishment of Debt	2,430	82,653
Gain on dissolution of unconsolidated company	(30,697)	0
Accrued promote income	(24,087)	0
Gains on land and depreciated property sales	(55,894)	(571,060)
Third-party construction contracts, net	723	4,956
Other accrued revenues and expenses, net	(5,817)	(11,875)
Operating distributions received in excess of (less than) equity in earnings from unconsolidated companies	(16,080)	(9,391)
Net cash provided by operating activities	191,372	175,701
Cash flows from investing activities:
Development of real estate investments	(213,262)	(109,617)
Acquisition of real estate investments and related intangible assets	(16,029)	(20,929)
Acquisition of undeveloped land	(27,243)	(25,579)
Second generation tenant improvements, leasing costs and building improvements	(30,237)	(30,871)
Other deferred leasing costs	(14,993)	(22,302)
Other assets	182,996	(94,745)
Proceeds from land and depreciated property sales, net	174,882	1,305,794
Capital distributions from unconsolidated companies	36,328	67,004
Capital contributions and advances to unconsolidated companies	(50,955)	(50,208)
Net cash provided by investing activities	41,487	1,018,547
Cash flows from financing activities:
Contributions from the General Partner	99,844	4,707
Proceeds from Issuance of Unsecured Debt	375,000	0
Payments on unsecured debt	(75,668)	(759,354)
Payments on secured indebtedness including principal amortization	(348,743)	(207,169)
Repayments of line of credit, net	(71,000)	(106,000)
Distributions to common shareholders/unitholders	(125,903)	(118,525)
Distributions to Noncontrolling Interest, Net	(52)	(143)
Change in book overdrafts	(10,974)	(5,322)
Deferred financing costs	(6,196)	(110)
Net cash used for financing activities	(163,692)	(1,191,916)
Net increase in cash and cash equivalents	69,167	2,332
Cash and cash equivalents at beginning of period	22,533	17,922
Cash and cash equivalents at end of period	91,700	20,254
Noncash investing and financing activities:
Mortgage notes receivable from buyers in property sales	1,685	200,000
Conversion of Limited Partner Units to common shares	$ 185	$ (1,693)