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Investments in and Advances to Joint Ventures - Service Fees and Income Earned by Company's Unconsolidated Joint Ventures (Detail) (Unconsolidated Joint Ventures [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Unconsolidated Joint Ventures [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Management and other fees | $ 28.6 | $ 29.8 | $ 34.0
Financing and other fees | 0 | 0.1 | 0.3
Development fees and leasing commissions | 8.7 | 7.0 | 7.2
Interest income | $ 9.7 | $ 0.1 | $ 0.4

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- Definition Acquisition financing and other fees related to unconsolidated joint ventures revenue. + References No definition available. + Details
Name: | ddr_AcquisitionFinancingAndOtherFeesRelatedToUnconsolidatedJointVenturesRevenue
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Revenue recognition from unconsolidated joint ventures in accordance with management contracts such as development fees and leasing commissions. + References No definition available. + Details
Name: | ddr_DevelopmentFeesAndLeasingCommissionsRelatedToUnconsolidatedJointVenturesRevenue
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition This element represents interest earned on the notes receivable from unconsolidated joint ventures. + References No definition available. + Details
Name: | ddr_InterestIncome
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Revenue recognition from unconsolidated joint ventures in accordance with management contracts for collection of management fees. + References No definition available. + Details
Name: | ddr_ManagementAndOtherFees
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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