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Investments in and Advances to Joint Ventures - Service Fees and Income Earned by Company's Unconsolidated Joint Ventures (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Equity Method Investments And Joint Ventures [Abstract] |  |
Management and other fees | $ 6.3 ddr_ManagementAndOtherFees | $ 6.1 ddr_ManagementAndOtherFees
Development fees and leasing commissions | 1.6 ddr_DevelopmentFeesAndLeasingCommissionsRelatedToUnconsolidatedJointVenturesRevenue | 2.0 ddr_DevelopmentFeesAndLeasingCommissionsRelatedToUnconsolidatedJointVenturesRevenue
Interest income | $ 6.3 ddr_InterestIncome | $ 1.7 ddr_InterestIncome

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- Definition Service fees and income earned for development and leasing in accordance with management contracts related to equity method investments. + 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 accounted for under the equity method. + 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 Service fees and income earned for managing in accordance with management contracts related to equity method investments. + 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_EquityMethodInvestmentsAndJointVenturesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration