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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 | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Equity Method Investments And Joint Ventures [Abstract] |  |  |  |
Management and other fees | $ 5.9 | $ 7.4 | $ 18.2 | $ 22.6
Development fees and leasing commissions | 1.4 | 2.7 | 4.9 | 7.9
Interest income | $ 1.7 | $ 5.3 | $ 5.0 | $ 14.4

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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
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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