Consolidated Balance Sheets - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Document Period End Date	Sep. 30, 2019
ASSETS
Real Estate Assets	$ 7,691,643	$ 7,248,346
Construction in progress	469,218	477,162
Investments in and advances to unconsolidated joint ventures	110,815	110,795
Undeveloped land	307,973	360,816
Real estate investment property, at cost, total	8,579,649	8,197,119
Accumulated depreciation	(1,427,180)	(1,344,176)
Net real estate investments	7,152,469	6,852,943
Real estate investments and other assets held-for-sale	23,739	1,082
Cash and cash equivalents	121,233	17,901
Accounts receivable	20,449	14,254
Straight-line rent receivable	123,689	109,334
Receivables on construction contracts, including retentions	24,186	41,215
Deferred leasing and other costs, net of accumulated amortization	315,579	313,799
Restricted cash held in escrow for like kind exchange	119,240	0
Notes receivable from property sales	127,550	272,550
Other escrow deposits and other assets	234,820	180,946
Total Assets	8,262,954	7,804,024
LIABILITIES AND EQUITY
Secured debt, net of deferred financing costs	34,896	79,563
Unsecured debt, net of deferred financing costs	2,732,686	2,548,938
Unsecured line of credit	0	30,000
Long-term debt, total	2,767,582	2,658,501
Liabilities related to real estate investments held-for-sale	2,515	0
Construction payables and amounts due subcontractors, including retentions	70,310	92,288
Accrued real estate taxes	85,684	73,358
Accrued interest	28,680	16,153
Other liabilities	242,744	205,433
Tenant security deposits and prepaid rents	44,167	45,048
Total Liabilities	3,241,682	3,090,781
Equity
Common shares	3,663	3,589
Additional paid-in capital	5,472,510	5,244,375
Accumulated Other Comprehensive Loss	(42,104)	(4,676)
Distributions in excess of net income	(476,136)	(585,087)
Total shareholders' equity	4,957,933	4,658,201
Noncontrolling interests	63,339	55,042
Total Equity	5,021,272	4,713,243
Total Liabilities and Equity	$ 8,262,954	7,804,024
Duke Realty Limited Partnership [Member]
Document Period End Date	Sep. 30, 2019
ASSETS
Real Estate Assets	$ 7,691,643	7,248,346
Construction in progress	469,218	477,162
Investments in and advances to unconsolidated joint ventures	110,815	110,795
Undeveloped land	307,973	360,816
Real estate investment property, at cost, total	8,579,649	8,197,119
Accumulated depreciation	(1,427,180)	(1,344,176)
Net real estate investments	7,152,469	6,852,943
Real estate investments and other assets held-for-sale	23,739	1,082
Cash and cash equivalents	121,233	17,901
Accounts receivable	20,449	14,254
Straight-line rent receivable	123,689	109,334
Receivables on construction contracts, including retentions	24,186	41,215
Deferred leasing and other costs, net of accumulated amortization	315,579	313,799
Restricted cash held in escrow for like kind exchange	119,240	0
Notes receivable from property sales	127,550	272,550
Other escrow deposits and other assets	234,820	180,946
Total Assets	8,262,954	7,804,024
LIABILITIES AND EQUITY
Secured debt, net of deferred financing costs	34,896	79,563
Unsecured debt, net of deferred financing costs	2,732,686	2,548,938
Unsecured line of credit	0	30,000
Long-term debt, total	2,767,582	2,658,501
Liabilities related to real estate investments held-for-sale	2,515	0
Construction payables and amounts due subcontractors, including retentions	70,310	92,288
Accrued real estate taxes	85,684	73,358
Accrued interest	28,680	16,153
Other liabilities	242,744	205,433
Tenant security deposits and prepaid rents	44,167	45,048
Total Liabilities	3,241,682	3,090,781
Equity
Common equity	5,000,037	4,662,877
Limited Partners' common equity	58,736	50,585
Accumulated Other Comprehensive Loss	(42,104)	(4,676)
Total partners' equity	5,016,669	4,708,786
Noncontrolling interests	4,603	4,457
Total Equity	5,021,272	4,713,243
Total Liabilities and Equity	$ 8,262,954	$ 7,804,024