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Impairment Charges and Impairment of Joint Venture Investments - Impairment Charges on Assets or Investments (Parenthetical) (Detail) | 3 Months Ended
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Mar. 31, 2015 ShoppingCenter
Operating Shopping Centers [Member] |
Schedule Of Investments [Line Items] |
Number of properties | 25
Minimum [Member] |
Schedule Of Investments [Line Items] |
Asset disposal period | 12 months
Maximum [Member] |
Schedule Of Investments [Line Items] |
Asset disposal period | 24 months

X
- Definition Asset disposal period. + References No definition available. + Details
Name: | ddr_AssetDisposalPeriod
Namespace Prefix: | ddr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- 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

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

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=ddr_OperatingAssetsImpairedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |