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Investments in and Advances to Joint Ventures - Condensed Combined Statements of Operations of Unconsolidated Joint Venture Investments (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015
Income Statement [Abstract]
Investment basis value for which no income loss recognized	$ 0ddr_InvestmentBasisValue
Obligation or Intent to fund additional capital	$ 0ddr_ObligationToFundAdditionalCapital

X

- Definition

No income (loss) recorded for those entities accounted for using the equity method in which its investment basis was zero.

+ References

No definition available.

+ Details

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

X

- Definition

The reporting entity's obligation to fund additional capital for an entity in which the reporting entity accounts for the investment using the equity method of accounting.

+ References

No definition available.

+ Details

Name:	ddr_ObligationToFundAdditionalCapital
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_IncomeStatementAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration