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Acquisitions - Summary of Acquired Shopping Centers (Parenthetical) (Detail) | Dec. 31, 2014 Assets
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Shopping Center [Member] | Blackstone II Acquisition [Member] |
Business Acquisition [Line Items] |
Number of shopping centers | 7

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- Definition Number of real estate properties acquired. + References No definition available. + Details
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Namespace Prefix: | ddr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=ddr_BlackstoneTwoAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |