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Acquisitions - Summary of Acquired Shopping Centers (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Business Acquisition [Line Items] |  |
Gross Purchase Price | $ 407,705,000 us-gaap_BusinessCombinationConsiderationTransferred1 | $ 1,063,681,000 us-gaap_BusinessCombinationConsiderationTransferred1
Blackstone II Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired | 2014-09 |
Gross Purchase Price | 395,300,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneTwoAcquisitionMember |
Face Value of Mortgage Debt Assumed | 233,300,000 ddr_NonCashFaceValueOfDebtAssumed / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneTwoAcquisitionMember |
Blackstone I Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired |  | 2013-10
Gross Purchase Price |  | 1,550,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneOneAcquisitionMember
Face Value of Mortgage Debt Assumed |  | 792,900,000 ddr_NonCashFaceValueOfDebtAssumed / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneOneAcquisitionMember
Shopping Center [Member] | Parcels Adjacent To existing shopping centers [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired |  | 2013-06
Gross Purchase Price |  | 11,700,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = ddr_ParcelsAdjacentToExistingShoppingCentersMember
Face Value of Mortgage Debt Assumed |  | 0 ddr_NonCashFaceValueOfDebtAssumed / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = ddr_ParcelsAdjacentToExistingShoppingCentersMember
Shopping Center [Member] | Colorado Springs [Member] | CO [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired | 2014-04 |
Gross Purchase Price | 29,400,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = ddr_ColoradoSpringsMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_CO |
Face Value of Mortgage Debt Assumed | 12,900,000 ddr_NonCashFaceValueOfDebtAssumed / invest_InvestmentGeographicRegionAxis = ddr_ColoradoSpringsMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_CO |
Shopping Center [Member] | Roseville [Member] | CA [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired | 2014-05 |
Gross Purchase Price | 89,500,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = ddr_RosevilleMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_CA |
Face Value of Mortgage Debt Assumed | 0 ddr_NonCashFaceValueOfDebtAssumed / invest_InvestmentGeographicRegionAxis = ddr_RosevilleMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_CA |
Shopping Center [Member] | Cincinnati [Member] | OH [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired | 2014-05 |
Gross Purchase Price | 29,500,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = ddr_CincinnatiMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_OH |
Face Value of Mortgage Debt Assumed | 0 ddr_NonCashFaceValueOfDebtAssumed / invest_InvestmentGeographicRegionAxis = ddr_CincinnatiMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_OH |
Shopping Center [Member] | Chicago | IL [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired | 2014-06 |
Gross Purchase Price | 98,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = ddr_ChicagoMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_IL |
Face Value of Mortgage Debt Assumed | 35,500,000 ddr_NonCashFaceValueOfDebtAssumed / invest_InvestmentGeographicRegionAxis = ddr_ChicagoMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_IL |
Shopping Center [Member] | Philadelphia [Member] | PA [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired | 2014-08 |
Gross Purchase Price | 31,500,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = ddr_PhiladelphiaMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_PA |
Face Value of Mortgage Debt Assumed | 0 ddr_NonCashFaceValueOfDebtAssumed / invest_InvestmentGeographicRegionAxis = ddr_PhiladelphiaMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_PA |
Shopping Center [Member] | Erie [Member] | PA [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired | 2014-12 |
Gross Purchase Price | 15,600,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = ddr_ErieMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_PA |
Face Value of Mortgage Debt Assumed | 0 ddr_NonCashFaceValueOfDebtAssumed / invest_InvestmentGeographicRegionAxis = ddr_ErieMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_PA |
Shopping Center [Member] | Oakland [Member] | CA [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired |  | 2013-02
Gross Purchase Price |  | 41,100,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = ddr_OaklandMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_CA
Face Value of Mortgage Debt Assumed |  | 0 ddr_NonCashFaceValueOfDebtAssumed / invest_InvestmentGeographicRegionAxis = ddr_OaklandMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_CA
Shopping Center [Member] | Dallas [Member] | TX [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired |  | 2013-03
Gross Purchase Price |  | 40,300,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = ddr_DallasMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_TX
Face Value of Mortgage Debt Assumed |  | 0 ddr_NonCashFaceValueOfDebtAssumed / invest_InvestmentGeographicRegionAxis = ddr_DallasMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_TX
Shopping Center [Member] | Tampa, Atlanta, Newport News and Richmond [Member] | Florida Georgia And Virginia [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired |  | 2013-04
Gross Purchase Price |  | 110,500,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = ddr_TampaAtlantaNewportNewsAndRichmondMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = ddr_FloridaGeorgiaAndVirginiaMember
Face Value of Mortgage Debt Assumed |  | 0 ddr_NonCashFaceValueOfDebtAssumed / invest_InvestmentGeographicRegionAxis = ddr_TampaAtlantaNewportNewsAndRichmondMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = ddr_FloridaGeorgiaAndVirginiaMember
Shopping Center [Member] | Orlando and Atlanta [Member] | Florida and Georgia [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired |  | 2013-07
Gross Purchase Price |  | 258,500,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = ddr_OrlandoAndAtlantaMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = ddr_FloridaAndGeorgiaMember
Face Value of Mortgage Debt Assumed |  | 139,400,000 ddr_NonCashFaceValueOfDebtAssumed / invest_InvestmentGeographicRegionAxis = ddr_OrlandoAndAtlantaMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = ddr_FloridaAndGeorgiaMember
Shopping Center [Member] | Blackstone II Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired | 2014-09 |
Gross Purchase Price | 395,300,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneTwoAcquisitionMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember |
Face Value of Mortgage Debt Assumed | 233,300,000 ddr_NonCashFaceValueOfDebtAssumed / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneTwoAcquisitionMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember |
Shopping Center [Member] | Blackstone I Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Date acquired |  | 2013-10
Gross Purchase Price |  | 1,548,400,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneOneAcquisitionMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember
Face Value of Mortgage Debt Assumed |  | $ 792,900,000 ddr_NonCashFaceValueOfDebtAssumed / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneOneAcquisitionMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember

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