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Segment Information - Summary of Company's Shopping Centers (Detail) (Shopping Center [Member]) | Dec. 31, 2014 ShoppingCenter | Dec. 31, 2013 ShoppingCenter | Dec. 31, 2012 ShoppingCenter
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Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Shopping centers owned | 415 us-gaap_NumberOfRealEstateProperties | 416 us-gaap_NumberOfRealEstateProperties | 452 us-gaap_NumberOfRealEstateProperties
Joint ventures [Member] |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |
Shopping centers owned | 189 us-gaap_NumberOfRealEstateProperties / dei_LegalEntityAxis = us-gaap_CorporateJointVentureMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember | 173 us-gaap_NumberOfRealEstateProperties / dei_LegalEntityAxis = us-gaap_CorporateJointVentureMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember | 209 us-gaap_NumberOfRealEstateProperties / dei_LegalEntityAxis = us-gaap_CorporateJointVentureMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember

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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

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- Details
Name: | dei_LegalEntityAxis=us-gaap_CorporateJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |