Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Real Estate Assets	$ 9,104,690	$ 8,745,155
Construction in progress	617,887	695,219
Investments in and advances to unconsolidated joint ventures	166,272	131,898
Undeveloped land	331,293	291,614
Real estate investment property, at cost, total	10,220,142	9,863,886
Accumulated depreciation	(1,659,068)	(1,659,308)
Net real estate investments	8,561,074	8,204,578
Real estate investments and other assets held-for-sale	198,914	67,946
Cash and cash equivalents	9,874	6,309
Accounts receivable	12,323	15,204
Straight-line rent receivable	162,918	153,943
Receivables on construction contracts, including retentions	96,164	30,583
Deferred leasing and other costs, net of accumulated amortization	328,973	329,765
Restricted cash held in escrow for like kind exchange	273,413	47,682
Other escrow deposits and other assets	404,724	255,384
Total Assets	10,048,377	9,111,394
LIABILITIES AND EQUITY
Secured debt, net of deferred financing costs	60,529	64,074
Unsecured debt, net of deferred financing costs	3,138,926	3,025,977
Unsecured line of credit	156,000	295,000
Long-term debt, total	3,355,455	3,385,051
Liabilities related to real estate investments held-for-sale	12,243	7,740
Construction payables and amounts due subcontractors, including retentions	157,693	62,332
Accrued real estate taxes	104,123	76,501
Accrued interest	21,674	18,363
Other liabilities	295,061	269,806
Tenant security deposits and prepaid rents	57,745	57,153
Total Liabilities	4,003,994	3,876,946
Equity
Common shares	3,807	3,733
Additional paid-in capital	6,046,397	5,723,326
Accumulated Other Comprehensive Loss	(28,900)	(31,568)
Distributions in excess of net income	(71,005)	(532,519)
Total shareholders' equity	5,950,299	5,162,972
Noncontrolling interests	94,084	71,476
Total Equity	6,044,383	5,234,448
Total Liabilities and Equity	10,048,377	9,111,394
Duke Realty Limited Partnership [Member]
ASSETS
Real Estate Assets	9,104,690	8,745,155
Construction in progress	617,887	695,219
Investments in and advances to unconsolidated joint ventures	166,272	131,898
Undeveloped land	331,293	291,614
Real estate investment property, at cost, total	10,220,142	9,863,886
Accumulated depreciation	(1,659,068)	(1,659,308)
Net real estate investments	8,561,074	8,204,578
Real estate investments and other assets held-for-sale	198,914	67,946
Cash and cash equivalents	9,874	6,309
Accounts receivable	12,323	15,204
Straight-line rent receivable	162,918	153,943
Receivables on construction contracts, including retentions	96,164	30,583
Deferred leasing and other costs, net of accumulated amortization	328,973	329,765
Restricted cash held in escrow for like kind exchange	273,413	47,682
Other escrow deposits and other assets	404,724	255,384
Total Assets	10,048,377	9,111,394
LIABILITIES AND EQUITY
Secured debt, net of deferred financing costs	60,529	64,074
Unsecured debt, net of deferred financing costs	3,138,926	3,025,977
Unsecured line of credit	156,000	295,000
Long-term debt, total	3,355,455	3,385,051
Liabilities related to real estate investments held-for-sale	12,243	7,740
Construction payables and amounts due subcontractors, including retentions	157,693	62,332
Accrued real estate taxes	104,123	76,501
Accrued interest	21,674	18,363
Other liabilities	295,061	269,806
Tenant security deposits and prepaid rents	57,745	57,153
Total Liabilities	4,003,994	3,876,946
Equity
Common equity	5,979,199	5,194,540
Limited Partners' common equity	89,500	66,874
Accumulated Other Comprehensive Loss	(28,900)	(31,568)
Total partners' equity	6,039,799	5,229,846
Noncontrolling interests	4,584	4,602
Total Equity	6,044,383	5,234,448
Total Liabilities and Equity	$ 10,048,377	$ 9,111,394