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Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] $ in Millions | 1 Months Ended
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Oct. 31, 2016 USD ($) Assets
Subsequent Event [Line Items] |
Aggregate sale price of wholly owned operating assets | $ | $ 483.5
Number of operating assets sold | Assets | 18

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- Definition Aggregate sale price of assets. + References No definition available. + Details
Name: | ddr_AggregateSalePriceOfAssets
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Number of properties sold attributable to the disposal group during the reporting period. + References No definition available. + Details
Name: | ddr_NumberOfPropertiesSold
Namespace Prefix: | ddr_
Data Type: | xbrli:integerItemType
Balance Type: | na
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

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