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Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Detail) | 12 Months Ended
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Dec. 31, 2012
Buildings [Member] |
Property, Plant and Equipment [Line Items] |
Estimated useful lives of the assets | 31 years 6 months
Tenant improvements [Member] |
Property, Plant and Equipment [Line Items] |
Estimated useful lives of the assets | Shorter of economic life or lease terms
Minimum [Member] | Building improvements and fixtures [Member] |
Property, Plant and Equipment [Line Items] |
Estimated useful lives of the assets | 5 years
Maximum [Member] | Building improvements and fixtures [Member] |
Property, Plant and Equipment [Line Items] |
Estimated useful lives of the assets | 20 years

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- Definition Property Plant And Equipment Useful Life Description + References No definition available. + Details
Name: | ddr_PropertyPlantAndEquipmentUsefulLifeDescription
Namespace Prefix: | ddr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration