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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 | Dec. 31, 2014 | Dec. 31, 2013
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Condensed Combined Balance Sheets |  |
Land | $ 2,208,468 us-gaap_Land | $ 2,209,970 us-gaap_Land
Buildings | 7,087,040 us-gaap_InvestmentBuildingAndBuildingImprovements | 6,949,440 us-gaap_InvestmentBuildingAndBuildingImprovements
Fixtures and tenant improvements | 645,035 us-gaap_FixturesAndEquipmentGross | 599,221 us-gaap_FixturesAndEquipmentGross
Total real estate rental property | 9,940,543 us-gaap_RealEstateInvestmentPropertyAtCost | 9,758,631 us-gaap_RealEstateInvestmentPropertyAtCost
Less: Accumulated depreciation | (1,909,585)us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation | (1,823,199)us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation
Real estate rental property, net | 8,030,958 us-gaap_RealEstateInvestmentPropertyNet | 7,935,432 us-gaap_RealEstateInvestmentPropertyNet
Land held for development and construction in progress | 395,242 us-gaap_DevelopmentInProcess | 452,980 us-gaap_DevelopmentInProcess
Total real estate assets, net | 8,426,200 us-gaap_RealEstateInvestments | 8,401,082 us-gaap_RealEstateInvestments
Other assets | 451,442 us-gaap_OtherAssets | 477,868 us-gaap_OtherAssets
Total assets | 9,541,895 us-gaap_Assets | 9,693,073 us-gaap_Assets
Mortgage debt | 1,689,805 us-gaap_NotesAndLoansPayable | 1,761,421 us-gaap_NotesAndLoansPayable
Total liabilities | 5,744,367 us-gaap_Liabilities | 5,765,194 us-gaap_Liabilities
Total liabilities and equity | 9,541,895 us-gaap_LiabilitiesAndStockholdersEquity | 9,693,073 us-gaap_LiabilitiesAndStockholdersEquity
Company's share of Accumulated Equity | 122,937 ddr_CompanysShareInAccumulatedEquityOfUnconsolidatedJointVentures | 365,297 ddr_CompanysShareInAccumulatedEquityOfUnconsolidatedJointVentures
Unconsolidated Joint Ventures [Member] |  |
Condensed Combined Balance Sheets |  |
Land | 1,439,849 us-gaap_Land / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 1,275,232 us-gaap_Land / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Buildings | 3,854,585 us-gaap_InvestmentBuildingAndBuildingImprovements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 3,940,806 us-gaap_InvestmentBuildingAndBuildingImprovements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Fixtures and tenant improvements | 200,696 us-gaap_FixturesAndEquipmentGross / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 266,851 us-gaap_FixturesAndEquipmentGross / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Total real estate rental property | 5,495,130 us-gaap_RealEstateInvestmentPropertyAtCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 5,482,889 us-gaap_RealEstateInvestmentPropertyAtCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Less: Accumulated depreciation | (773,256)us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | (839,867)us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Real estate rental property, net | 4,721,874 us-gaap_RealEstateInvestmentPropertyNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 4,643,022 us-gaap_RealEstateInvestmentPropertyNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Land held for development and construction in progress | 55,698 us-gaap_DevelopmentInProcess / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 116,088 us-gaap_DevelopmentInProcess / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Total real estate assets, net | 4,777,572 us-gaap_RealEstateInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 4,759,110 us-gaap_RealEstateInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Cash and restricted cash | 100,812 ddr_CashAndRestrictedCash / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 282,866 ddr_CashAndRestrictedCash / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Receivables, net | 80,508 us-gaap_AccountsAndNotesReceivableNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 101,003 us-gaap_AccountsAndNotesReceivableNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Other assets | 394,751 us-gaap_OtherAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 196,615 us-gaap_OtherAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Total assets | 5,353,643 us-gaap_Assets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 5,339,594 us-gaap_Assets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Mortgage debt | 3,552,764 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 3,282,643 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Notes and accrued interest payable to DDR | 144,831 ddr_NotesAndAccruedInterestPayableToParentCompany / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 127,679 ddr_NotesAndAccruedInterestPayableToParentCompany / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Other liabilities | 276,998 us-gaap_OtherLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 245,368 us-gaap_OtherLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Total liabilities | 3,974,593 us-gaap_Liabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 3,655,690 us-gaap_Liabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Redeemable preferred equity | 305,310 us-gaap_RedeemableNoncontrollingInterestEquityPreferredCarryingAmount / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 71,771 us-gaap_RedeemableNoncontrollingInterestEquityPreferredCarryingAmount / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Accumulated equity | 1,073,740 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | 1,612,133 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember
Total liabilities and equity | $ 5,353,643 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember | $ 5,339,594 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_UnconsolidatedJointVenturesMember

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- Definition 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. + References No definition available. + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3-4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The current amount of expenditures for a real estate project that has not yet been completed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.10) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19-26) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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