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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 | Sep. 30, 2014
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Income Statement [Abstract] |
Investment basis Value For which No Income Loss Recognized | $ 0

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

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