Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets [Abstract]
Real Estate Assets	$ 8,745,155	$ 7,993,377
Construction in Progress	695,219	550,926
Investments in and advances to unconsolidated joint ventures	131,898	133,074
Undeveloped land	291,614	254,537
Real estate investment property, at cost, total	9,863,886	8,931,914
Accumulated depreciation	(1,659,308)	(1,480,461)
Net real estate investments	8,204,578	7,451,453
Real estate investments and other assets held-for-sale	67,946	18,463
Cash and cash equivalents	6,309	110,891
Accounts receivable	15,204	20,349
Straight-line rent receivable	153,943	129,344
Receivables on construction contracts, including retentions	30,583	25,607
Deferred Leasing and other costs, net of accumulated amortization	329,765	320,444
Restricted cash held in escrow for like-kind exchange	47,682	1,673
Notes receivable from property sales	0	110,000
Other escrow deposits and other assets	255,384	232,338
Total Assets	9,111,394	8,420,562
Liabilities and Equity [Abstract]
Secured debt, net of deferred financing costs	64,074	34,023
Unsecured debt, net of deferred financing costs	3,025,977	2,880,742
Unsecured line of credit	295,000	0
Long-term debt, total	3,385,051	2,914,765
Liabilities related to real estate investments held-for-sale	7,740	887
Construction payables and amounts due subcontractors, including retentions	62,332	68,840
Accrued real estate taxes	76,501	69,042
Accrued interest	18,363	14,181
Other Liabilities	269,806	223,680
Tenant Security Deposits and Prepaid Rents	57,153	48,907
Total Liabilities	3,876,946	3,340,302
Equity:
Common shares	3,733	3,680
Additional paid in capital	5,723,326	5,525,463
Accumulated other comprehensive loss	(31,568)	(35,036)
Distributions in excess of net income	(532,519)	(475,992)
Total stockholders' equity	5,162,972	5,018,115
Noncontrolling interests	71,476	62,145
Total Equity	5,234,448	5,080,260
Total Liabilities and Equity	9,111,394	8,420,562
Duke Realty Limited Partnership [Member]
Assets [Abstract]
Real Estate Assets	8,745,155	7,993,377
Construction in Progress	695,219	550,926
Investments in and advances to unconsolidated joint ventures	131,898	133,074
Undeveloped land	291,614	254,537
Real estate investment property, at cost, total	9,863,886	8,931,914
Accumulated depreciation	(1,659,308)	(1,480,461)
Net real estate investments	8,204,578	7,451,453
Real estate investments and other assets held-for-sale	67,946	18,463
Cash and cash equivalents	6,309	110,891
Accounts receivable	15,204	20,349
Straight-line rent receivable	153,943	129,344
Receivables on construction contracts, including retentions	30,583	25,607
Deferred Leasing and other costs, net of accumulated amortization	329,765	320,444
Restricted cash held in escrow for like-kind exchange	47,682	1,673
Notes receivable from property sales	0	110,000
Other escrow deposits and other assets	255,384	232,338
Total Assets	9,111,394	8,420,562
Liabilities and Equity [Abstract]
Secured debt, net of deferred financing costs	64,074	34,023
Unsecured debt, net of deferred financing costs	3,025,977	2,880,742
Unsecured line of credit	295,000	0
Long-term debt, total	3,385,051	2,914,765
Liabilities related to real estate investments held-for-sale	7,740	887
Construction payables and amounts due subcontractors, including retentions	62,332	68,840
Accrued real estate taxes	76,501	69,042
Accrued interest	18,363	14,181
Other Liabilities	269,806	223,680
Tenant Security Deposits and Prepaid Rents	57,153	48,907
Total Liabilities	3,876,946	3,340,302
Equity:
Common equity	5,194,540	5,053,151
Limited Partners' common equity	66,874	57,575
Accumulated other comprehensive loss	(31,568)	(35,036)
Total partners' equity	5,229,846	5,075,690
Noncontrolling interest	4,602	4,570
Total Equity	5,234,448	5,080,260
Total Liabilities and Equity	$ 9,111,394	$ 8,420,562