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Acquisitions - Schedule of Acquisitions Terms (Parenthetical) (Detail) | 12 Months Ended
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Dec. 31, 2014
Business Combinations [Abstract] |
Ownership interest percentage | 100.00%
Ownership interest of joint venture partner | 95.00%

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- Definition Aggregate ownership interest percentage in previous joint venture. + References No definition available. + Details
Name: | ddr_AggregateOwnershipInterestPercentageInPreviousJointVenture
Namespace Prefix: | ddr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The percentage of ownership of equity participation by the joint venture partner for the investee accounted for under the equity method of accounting. + References No definition available. + Details
Name: | ddr_OwnershipInterestOfJointVenturePartner
Namespace Prefix: | ddr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_BusinessCombinationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration