Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets [Abstract]
Real Estate Assets	$ 7,248,346	$ 6,593,567
Construction in Progress	477,162	401,407
Investments in and advances to unconsolidated joint ventures	110,795	126,487
Undeveloped land	360,816	226,987
Real estate investment property, at cost, total	8,197,119	7,348,448
Accumulated depreciation	(1,344,176)	(1,193,905)
Net real estate investments	6,852,943	6,154,543
Real estate investments and other assets held-for-sale	1,082	17,550
Cash and cash equivalents	17,901	67,562
Accounts receivable, net of allowance	14,254	19,427
Straight-line rent receivable, net of allowance	109,334	93,005
Receivables on construction contracts, including retentions	41,215	13,480
Deferred Leasing and other costs, net of accumulated amortization	313,799	292,682
Restricted cash held in escrow for like-kind exchange	0	116,405
Notes receivable from property sales	272,550	426,657
Other escrow deposits and other assets	180,946	186,885
Total Assets	7,804,024	7,388,196
Liabilities and Equity [Abstract]
Secured debt, net of deferred financing costs	79,563	311,349
Unsecured debt, net of deferred financing costs	2,548,938	2,111,542
Unsecured line of credit	30,000	0
Long-term debt, total	2,658,501	2,422,891
Liabilities related to real estate investments held-for-sale	0	1,163
Construction payables and amounts due subcontractors, including retentions	92,288	54,545
Accrued real estate taxes	73,358	67,374
Accrued interest	16,153	17,911
Other Liabilities	205,433	210,825
Tenant Security Deposits and Prepaid Rents	45,048	39,109
Total Liabilities	3,090,781	2,813,818
Equity:
Common shares	3,589	3,564
Additional paid in capital	5,244,375	5,205,316
Accumulated Other Comprehensive Income (Loss), Net of Tax	(4,676)	0
Distributions in excess of net income	(585,087)	(676,036)
Total stockholders' equity	4,658,201	4,532,844
Noncontrolling interests	55,042	41,534
Total Equity	4,713,243	4,574,378
Total Liabilities and Equity	7,804,024	7,388,196
Duke Realty Limited Partnership [Member]
Assets [Abstract]
Real Estate Assets	7,248,346	6,593,567
Construction in Progress	477,162	401,407
Investments in and advances to unconsolidated joint ventures	110,795	126,487
Undeveloped land	360,816	226,987
Real estate investment property, at cost, total	8,197,119	7,348,448
Accumulated depreciation	(1,344,176)	(1,193,905)
Net real estate investments	6,852,943	6,154,543
Real estate investments and other assets held-for-sale	1,082	17,550
Cash and cash equivalents	17,901	67,562
Accounts receivable, net of allowance	14,254	19,427
Straight-line rent receivable, net of allowance	109,334	93,005
Receivables on construction contracts, including retentions	41,215	13,480
Deferred Leasing and other costs, net of accumulated amortization	313,799	292,682
Restricted cash held in escrow for like-kind exchange	0	116,405
Notes receivable from property sales	272,550	426,657
Other escrow deposits and other assets	180,946	186,885
Total Assets	7,804,024	7,388,196
Liabilities and Equity [Abstract]
Secured debt, net of deferred financing costs	79,563	311,349
Unsecured debt, net of deferred financing costs	2,548,938	2,111,542
Unsecured line of credit	30,000	0
Long-term debt, total	2,658,501	2,422,891
Liabilities related to real estate investments held-for-sale	0	1,163
Construction payables and amounts due subcontractors, including retentions	92,288	54,545
Accrued real estate taxes	73,358	67,374
Accrued interest	16,153	17,911
Other Liabilities	205,433	210,825
Tenant Security Deposits and Prepaid Rents	45,048	39,109
Total Liabilities	3,090,781	2,813,818
Equity:
Common equity	4,662,877	4,532,844
Limited Partners' common equity	50,585	40,563
Accumulated Other Comprehensive Income (Loss), Net of Tax	(4,676)	0
Total partners' equity	4,708,786	4,573,407
Noncontrolling interest	4,457	971
Total Equity	4,713,243	4,574,378
Total Liabilities and Equity	$ 7,804,024	$ 7,388,196