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Segment Information - Company's Combined Shopping and Office Properties Portfolios (Detail) | Dec. 31, 2012 Property Store | Dec. 31, 2011 Store Property | Dec. 31, 2010 Store Property
--- | --- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Shopping centers owned | 452 | 432 | 478
Office properties | 0 | 5 | 6
Unconsolidated Joint Ventures [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Shopping centers owned | 206 | 177 | 189
Consolidated Joint Ventures [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Shopping centers owned | 3 | 2 | 3
States [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Shopping centers owned | 39 | 38 | 39
Office properties | 0 | 3 | 4

X
- Definition Represents the number of office properties owned. + References No definition available. + Details
Name: | ddr_NumberOfOfficePropertiesOwned
Namespace Prefix: | ddr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of shopping centers owned. + References No definition available. + Details
Name: | ddr_NumberOfShoppingCentersOwned
Namespace Prefix: | ddr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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