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Impairment Charges and Reserves - Impairment Charges on Assets or Investments (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Impairment Charges And Impairment Of Joint Venture Investments [Abstract] |  |
Assets marketed for sale | $ 22,000 | $ 0
Reserve of preferred equity interests | 76,000 | 0
Total impairment charges | $ 98,000 | $ 0

X
- Definition Amount of write-down of assets recognized into earnings attributable to assets marketed for sale or assets sold. + References No definition available. + Details
Name: | ddr_AssetsMarketedForSale
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Impairment charges and impairment of joint venture investments. + References No definition available. + Details
Name: | ddr_ImpairmentChargesAndImpairmentOfJointVentureInvestmentsAbstract
Namespace Prefix: | ddr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of write-down of assets recognized into earnings included in continuing operations and discontinued operations and the equity method investment other than temporary impairment. + References No definition available. + Details
Name: | ddr_ImpairmentChargesIncludingDiscontinuedOperationsAndInvestment
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reserve of preferred equity interests. + References No definition available. + Details
Name: | ddr_ReserveOfPreferredEquityInterests
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration