Real Estate and Accumulated Depreciation (Parenthetical) (Detail) (USD $)	Dec. 31, 2014
Real Estate And Accumulated Depreciation Disclosure [Abstract]
Tax cost basis of assets	$ 10,600,000,000us-gaap_RealEstateFederalIncomeTaxBasis
Real estate land under development	184,000,000ddr_RealEstateLandUnderDevelopment
Real estate construction in progress	211,200,000ddr_RealEstateConstructionInProgress
The amount of tax-exempt certificates excluded from encumbrances	15,000,000ddr_RealEstateTaxExemptBonds
Fair market value of debt adjustments excluded from encumbrances	$ 29,700,000ddr_FairMarketValueOfDebtAdjustments

Fair market value of debt adjustments excluded from encumbrances.

No definition available.

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- Definition

The amount of construction in progress included in real estate.

+ References

No definition available.

+ Details

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

- Definition

The amount of land under development included in real estate.

+ References

No definition available.

+ Details

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

- Definition

The amount of tax-exempt certificates excluded from encumbrances.

+ References

No definition available.

+ Details

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

- Details

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- 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 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 28

-Article 12

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule III

-Article 5

Reference 4: 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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant