Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets [Abstract]
Real Estate Assets	$ 7,993,377	$ 7,248,346
Construction in Progress	550,926	477,162
Investments in and advances to unconsolidated joint ventures	133,074	110,795
Undeveloped land	254,537	360,816
Real estate investment property, at cost, total	8,931,914	8,197,119
Accumulated depreciation	(1,480,461)	(1,344,176)
Net real estate investments	7,451,453	6,852,943
Real estate investments and other assets held-for-sale	18,463	1,082
Cash and cash equivalents	110,891	17,901
Accounts receivable, net of allowance	20,349	14,254
Straight-line rent receivable, net of allowance	129,344	109,334
Receivables on construction contracts, including retentions	25,607	41,215
Deferred Leasing and other costs, net of accumulated amortization	320,444	313,799
Restricted cash held in escrow for like-kind exchange	1,673	0
Notes receivable from property sales	110,000	272,550
Other escrow deposits and other assets	232,338	180,946
Total Assets	8,420,562	7,804,024
Liabilities and Equity [Abstract]
Secured debt, net of deferred financing costs	34,023	79,563
Unsecured debt, net of deferred financing costs	2,880,742	2,548,938
Unsecured line of credit	0	30,000
Long-term debt, total	2,914,765	2,658,501
Liabilities related to real estate investments held-for-sale	887	0
Construction payables and amounts due subcontractors, including retentions	68,840	92,288
Accrued real estate taxes	69,042	73,358
Accrued interest	14,181	16,153
Other Liabilities	223,680	205,433
Tenant Security Deposits and Prepaid Rents	48,907	45,048
Total Liabilities	3,340,302	3,090,781
Equity:
Common shares	3,680	3,589
Additional paid in capital	5,525,463	5,244,375
Accumulated other comprehensive loss	(35,036)	(4,676)
Distributions in excess of net income	(475,992)	(585,087)
Total stockholders' equity	5,018,115	4,658,201
Noncontrolling interests	62,145	55,042
Total Equity	5,080,260	4,713,243
Total Liabilities and Equity	8,420,562	7,804,024
Duke Realty Limited Partnership [Member]
Assets [Abstract]
Real Estate Assets	7,993,377	7,248,346
Construction in Progress	550,926	477,162
Investments in and advances to unconsolidated joint ventures	133,074	110,795
Undeveloped land	254,537	360,816
Real estate investment property, at cost, total	8,931,914	8,197,119
Accumulated depreciation	(1,480,461)	(1,344,176)
Net real estate investments	7,451,453	6,852,943
Real estate investments and other assets held-for-sale	18,463	1,082
Cash and cash equivalents	110,891	17,901
Accounts receivable, net of allowance	20,349	14,254
Straight-line rent receivable, net of allowance	129,344	109,334
Receivables on construction contracts, including retentions	25,607	41,215
Deferred Leasing and other costs, net of accumulated amortization	320,444	313,799
Restricted cash held in escrow for like-kind exchange	1,673	0
Notes receivable from property sales	110,000	272,550
Other escrow deposits and other assets	232,338	180,946
Total Assets	8,420,562	7,804,024
Liabilities and Equity [Abstract]
Secured debt, net of deferred financing costs	34,023	79,563
Unsecured debt, net of deferred financing costs	2,880,742	2,548,938
Unsecured line of credit	0	30,000
Long-term debt, total	2,914,765	2,658,501
Liabilities related to real estate investments held-for-sale	887	0
Construction payables and amounts due subcontractors, including retentions	68,840	92,288
Accrued real estate taxes	69,042	73,358
Accrued interest	14,181	16,153
Other Liabilities	223,680	205,433
Tenant Security Deposits and Prepaid Rents	48,907	45,048
Total Liabilities	3,340,302	3,090,781
Equity:
Common equity	5,053,151	4,662,877
Limited Partners' common equity	57,575	50,585
Accumulated other comprehensive loss	(35,036)	(4,676)
Total partners' equity	5,075,690	4,708,786
Noncontrolling interest	4,570	4,457
Total Equity	5,080,260	4,713,243
Total Liabilities and Equity	$ 8,420,562	$ 7,804,024