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Summary of Significant Accounting Policies - Summary of Estimated Net Future Amortization Income Associated with Above and Below-Market Leases (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Above And Below Market Lease Future Amortization Income [Abstract] |
2015 | $ 1.4 ddr_FutureAmortizationIncomeYearOne
2016 | 2.7 ddr_FutureAmortizationIncomeYearTwo
2017 | 4.0 ddr_FutureAmortizationIncomeYearThree
2018 | 5.7 ddr_FutureAmortizationIncomeYearFour
2019 | $ 6.6 ddr_FutureAmortizationIncomeYearFive

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- Details
Name: | ddr_AboveAndBelowMarketLeaseFutureAmortizationIncomeAbstract
Namespace Prefix: | ddr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of amortization income, net associated with above and below market leases expected to be recognized during year five of the five succeeding fiscal years. + References No definition available. + Details
Name: | ddr_FutureAmortizationIncomeYearFive
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of amortization income, net associated with above and below market leases expected to be recognized during year four of the five succeeding fiscal years. + References No definition available. + Details
Name: | ddr_FutureAmortizationIncomeYearFour
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of amortization income, net associated with above and below market leases expected to be recognized during year one of the five succeeding fiscal years. + References No definition available. + Details
Name: | ddr_FutureAmortizationIncomeYearOne
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of amortization income, net associated with above and below market leases expected to be recognized during year three of the five succeeding fiscal years. + References No definition available. + Details
Name: | ddr_FutureAmortizationIncomeYearThree
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of amortization income, net associated with above and below market leases expected to be recognized during year two of the five succeeding fiscal years. + References No definition available. + Details
Name: | ddr_FutureAmortizationIncomeYearTwo
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration