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Investments in and Advances to Joint Ventures - Adjustments to Company's Share of Joint Venture Net Income (Loss) (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Schedule Of Equity Method Investments Joint Ventures [Line Items] |  |  |
Income (loss), net | $ 1.7 | $ 26.7 | $ (0.7)

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- Definition This element represents the amortization of basis differential, deferred gains and differences in gain (loss) on sale of certain assets due to the basis differentials, and other than temporary impairment charges. + References No definition available. + Details
Name: | ddr_IncomeLossNet
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | ddr_ScheduleOfEquityMethodInvestmentsJointVenturesLineItems
Namespace Prefix: | ddr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration