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Investments in and Advances to Joint Ventures - Summary of Company's Equity Method Joint Ventures Included in Investments in and Advances (Detail)	12 Months Ended
	Dec. 31, 2014
DDR Domestic Retail Fund I [Member]
Schedule Of Equity Method Investments [Line Items]
Effective Ownership Percentage	20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_DdrDomesticRetailFundOneMember
Equity Method Investment, Assets Owned	56 grocery-anchored retail centers in several states
DDR-SAU Retail Fund LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Effective Ownership Percentage	20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_DdrSuRetailFundLlcMember
Equity Method Investment, Assets Owned	23 grocery-anchored retail centers in several states
DDRTC Core Retail Fund LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Effective Ownership Percentage	15.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_DdrtcCoreRetailFundMember
Equity Method Investment, Assets Owned	26 shopping centers in several states
BRE DDR Retail Holdings III [Member]
Schedule Of Equity Method Investments [Line Items]
Effective Ownership Percentage	5.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_BREDDRRetailHoldingsIIIMember
Equity Method Investment, Assets Owned	70 shopping centers in several states
Other Joint Venture Interests [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment, Assets Owned	13 shopping centers in several states and a management company
Coventry II Fund [Member]
Schedule Of Equity Method Investments [Line Items]
Effective Ownership Percentage	20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_CoventryTwoFundMember
Equity Method Investment, Assets Owned	Three shopping centers in three states
Minimum [Member] | Other Joint Venture Interests [Member]
Schedule Of Equity Method Investments [Line Items]
Effective Ownership Percentage	25.25%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_OtherJointVentureInterestsMember
Maximum [Member] | Other Joint Venture Interests [Member]
Schedule Of Equity Method Investments [Line Items]
Effective Ownership Percentage	79.45%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ddr_OtherJointVentureInterestsMember

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- Definition

The number of assets owned as of the balance sheet date.

+ References

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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