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Subsequent Events - Additional Information (Detail) $ in Millions | 1 Months Ended
--- | ---
Jan. 31, 2017 USD ($)
Chicago, IL [Member] | Subsequent Event [Member] |
Subsequent Event [Line Items] |
Gross purchase Price | $ 81.0

X
- Definition Business acquisition cost of acquired entity purchase price gross. + References No definition available. + Details
Name: | ddr_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceGross
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=ddr_ChicagoILMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |