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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Contingencies And Commitments [Line Items] |
Agreements entered into with general contractors for the construction or redevelopment of shopping centers | $ 52.2 ddr_CommitmentsForConstructionOfProperties
Outstanding letters of credit | 31.3 us-gaap_LettersOfCreditOutstandingAmount
Affiliate debt guarantee | $ 4.9 us-gaap_GuaranteeObligationsMaximumExposure
Long-term ground leases expiration period | various dates through 2070
Period space in shopping centers leased | One month to 30 years
Coventry II Joint Ventures [Member] |
Contingencies And Commitments [Line Items] |
Number of existing retail properties | 10 ddr_NumberOfExistingRetailProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_CoventryTwoJointVenturesMember

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- Definition Agreements entered into with general contractors for the construction or redevelopment of shopping centers. + References No definition available. + Details
Name: | ddr_CommitmentsForConstructionOfProperties
Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Definition Long term ground leases expiration period. + References No definition available. + Details
Name: | ddr_LongTermGroundLeasesExpirationPeriod
Namespace Prefix: | ddr_
Data Type: | us-types:dateStringItemType
Balance Type: | na
Period Type: | duration

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- Definition Existing or proposed retail properties that were acquired through various unconsolidated joint ventures. + References No definition available. + Details
Name: | ddr_NumberOfExistingRetailProperties
Namespace Prefix: | ddr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Period space in shopping centers leased. + References No definition available. + Details
Name: | ddr_PeriodSpaceInShoppingCentersLeased
Namespace Prefix: | ddr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ddr_CoventryTwoJointVenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |