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Disposition of Real Estate and Discontinued Operations - Additional Information (Detail) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($) Property Parcels	Dec. 31, 2014 Property
Discontinued Operations And Disposal Groups [Abstract]
Number of properties sold	13
Number of parcels of land sold | Parcels	3
Proceeds from sale of real estate | $	$ 161.3
Number of properties sold under discontinued operations		35

X

- Definition

Discontinued operations number of real estate properties sold.

+ References

No definition available.

+ Details

Name:	ddr_DiscontinuedOperationsNumberOfRealEstatePropertiesSold
Namespace Prefix:	ddr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of parcels of land sold.

+ References

No definition available.

+ Details

Name:	ddr_NumberOfParcelsOfLandSold
Namespace Prefix:	ddr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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

- References

No definition available.

+ Details

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

X

- Definition

Revenue from the sale of commercial, industrial, or residential property during the period. This element is more likely than not relevant to an entity for which real estate operations are a principal activity. If real estate operations are not a principal activity, the reporting entity would likely use a gain (loss) on sale of property, plant, or equipment type element.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SX 210.5-03.1(e))



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_SalesOfRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration