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Investments in and Advances to Joint Ventures - Condensed Combined Financial Information of Company's Unconsolidated Joint Venture Investments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Condensed Combined Balance Sheets
Land	$ 2,195,039us-gaap_Land	$ 2,208,468us-gaap_Land
Buildings	6,933,849us-gaap_InvestmentBuildingAndBuildingImprovements	7,087,040us-gaap_InvestmentBuildingAndBuildingImprovements
Fixtures and tenant improvements	643,222us-gaap_FixturesAndEquipmentGross	645,035us-gaap_FixturesAndEquipmentGross
Total real estate rental property	9,772,110us-gaap_RealEstateInvestmentPropertyAtCost	9,940,543us-gaap_RealEstateInvestmentPropertyAtCost
Less: Accumulated depreciation	(1,943,284)us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation	(1,909,585)us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation
Real estate rental property, net	7,828,826us-gaap_RealEstateInvestmentPropertyNet	8,030,958us-gaap_RealEstateInvestmentPropertyNet
Land held for development and construction in progress	275,305us-gaap_DevelopmentInProcess	395,242us-gaap_DevelopmentInProcess
Total real estate assets, net	8,104,131us-gaap_RealEstateInvestments	8,426,200us-gaap_RealEstateInvestments
Other assets	423,968us-gaap_OtherAssets	451,442us-gaap_OtherAssets
Total assets	9,211,110us-gaap_Assets	9,541,895us-gaap_Assets
Mortgage debt	1,675,464us-gaap_NotesAndLoansPayable	1,689,805us-gaap_NotesAndLoansPayable
Total liabilities	5,717,928us-gaap_Liabilities	5,744,367us-gaap_Liabilities
Total liabilities and equity	9,211,110us-gaap_LiabilitiesAndStockholdersEquity	9,541,895us-gaap_LiabilitiesAndStockholdersEquity
Company's share of accumulated equity	139,275ddr_CompanysShareInAccumulatedEquityOfUnconsolidatedJointVentures	122,937ddr_CompanysShareInAccumulatedEquityOfUnconsolidatedJointVentures
Redeemable preferred equity	307,563us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages	305,310us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
Basis differentials	(37,122)us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	(12,954)us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
Deferred development fees, net of portion related to the Company's interest	(2,453)ddr_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityDeferredDevelopmentFeesNetOfPortionRelatingToCompanysInterest	(2,562)ddr_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityDeferredDevelopmentFeesNetOfPortionRelatingToCompanysInterest
Amounts payable to the Company	3,077us-gaap_DueFromJointVentures	2,117us-gaap_DueFromJointVentures
Investments in and Advances to Joint Ventures	410,340us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	414,848us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Unconsolidated Joint Ventures [Member]
Condensed Combined Balance Sheets
Land	1,359,918us-gaap_Land / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	1,439,849us-gaap_Land / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Buildings	3,589,210us-gaap_InvestmentBuildingAndBuildingImprovements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	3,854,585us-gaap_InvestmentBuildingAndBuildingImprovements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Fixtures and tenant improvements	180,389us-gaap_FixturesAndEquipmentGross / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	200,696us-gaap_FixturesAndEquipmentGross / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Total real estate rental property	5,129,517us-gaap_RealEstateInvestmentPropertyAtCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	5,495,130us-gaap_RealEstateInvestmentPropertyAtCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Less: Accumulated depreciation	(736,867)us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	(773,256)us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Real estate rental property, net	4,392,650us-gaap_RealEstateInvestmentPropertyNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	4,721,874us-gaap_RealEstateInvestmentPropertyNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Land held for development and construction in progress	53,597us-gaap_DevelopmentInProcess / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	55,698us-gaap_DevelopmentInProcess / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Total real estate assets, net	4,446,247us-gaap_RealEstateInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	4,777,572us-gaap_RealEstateInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Cash and restricted cash	82,012ddr_CashAndRestrictedCash / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	100,812ddr_CashAndRestrictedCash / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Receivables, net	47,767us-gaap_AccountsAndNotesReceivableNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	80,508us-gaap_AccountsAndNotesReceivableNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Other assets	373,758us-gaap_OtherAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	394,751us-gaap_OtherAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Total assets	4,949,784us-gaap_Assets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	5,353,643us-gaap_Assets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Mortgage debt	3,282,124us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	3,552,764us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Notes and accrued interest payable to the Company	3,077ddr_NotesAndAccruedInterestPayableToParentCompany / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	144,831ddr_NotesAndAccruedInterestPayableToParentCompany / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Other liabilities	202,378us-gaap_OtherLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	276,998us-gaap_OtherLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Total liabilities	3,487,579us-gaap_Liabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	3,974,593us-gaap_Liabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Redeemable preferred equity	307,563us-gaap_RedeemableNoncontrollingInterestEquityPreferredCarryingAmount / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	305,310us-gaap_RedeemableNoncontrollingInterestEquityPreferredCarryingAmount / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Accumulated equity	1,154,642us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	1,073,740us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Total liabilities and equity	$ 4,949,784us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember	$ 5,353,643us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember

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The reporting entity's share of accumulated equity in the combined entities in which the reporting entity accounts for the investment using the equity method of accounting.

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This element represents the Company's portion of deferred development fees earned from equity method investments and are amortized over the remaining life of the related asset.

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Carrying amount as of the balance sheet date, net of allowance for doubtful accounts, of account and note receivables due from other than related parties.

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The current amount of expenditures for a real estate project that has not yet been completed.

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For an unclassified balance sheet, amounts due from an entity in which the reporting entity shares joint control with another party or group.

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Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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Amount of equity, including noncontrolling interest, reported by an equity method investment of the entity.

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Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements.

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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