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Investments in and Advances to Joint Ventures - Service Fees and Income Earned by Company's Unconsolidated Joint Ventures (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Equity Method Investments And Joint Ventures [Abstract]
Management and other fees	$ 6.3ddr_ManagementAndOtherFees	$ 6.1ddr_ManagementAndOtherFees
Development fees and leasing commissions	1.6ddr_DevelopmentFeesAndLeasingCommissionsRelatedToUnconsolidatedJointVenturesRevenue	2.0ddr_DevelopmentFeesAndLeasingCommissionsRelatedToUnconsolidatedJointVenturesRevenue
Interest income	$ 6.3ddr_InterestIncome	$ 1.7ddr_InterestIncome

X

- Definition

Service fees and income earned for development and leasing in accordance with management contracts related to equity method investments.

+ References

No definition available.

+ Details

Name:	ddr_DevelopmentFeesAndLeasingCommissionsRelatedToUnconsolidatedJointVenturesRevenue
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

This element represents interest earned on the notes receivable from unconsolidated joint ventures accounted for under the equity method.

+ References

No definition available.

+ Details

Name:	ddr_InterestIncome
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Service fees and income earned for managing in accordance with management contracts related to equity method investments.

+ References

No definition available.

+ Details

Name:	ddr_ManagementAndOtherFees
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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