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Discontinued Operations - Additional Information (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 Property | Dec. 31, 2012 Property
Discontinued Operations And Disposal Groups [Abstract] |  |
Number of properties sold | 7 | 29
Number of assets held for sale | 2 |

X
- Definition Number of assets held for sale attributable to the disposal group during the reporting period. + References No definition available. + Details
Name: | ddr_NumberOfAssetsHeldForSale
Namespace Prefix: | ddr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of properties sold attributable to the disposal group during the reporting period. + References No definition available. + Details
Name: | ddr_NumberOfPropertiesSold
Namespace Prefix: | ddr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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