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Real Estate and Accumulated Depreciation (Parenthetical) (Detail) $ in Millions	Dec. 31, 2015 USD ($)
Real Estate And Accumulated Depreciation Disclosure [Abstract]
Tax cost basis of assets	$ 10,600.0
Real estate land under development	100.1
Real estate construction in progress	135.3
Fair market value of debt adjustments and unamortized debt issuance costs	$ 8.9

X

- Definition

Fair market value of debt adjustments and unamortized debt issuance costs.

+ References

No definition available.

+ Details

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X

- Definition

The amount of construction in progress included in real estate.

+ References

No definition available.

+ Details

Name:	ddr_RealEstateConstructionInProgress
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X

- Definition

The amount of land under development included in real estate.

+ References

No definition available.

+ Details

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Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

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X

- Definition

Cost basis of real estate investments for federal income tax purposes for entities with a substantial portion of business acquiring and holding investment real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 970
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28.FN6)
-URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04.(c) Schedule III)
-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

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