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Acquisitions - Summary of Acquired Shopping Centers (Parenthetical) (Detail)	Dec. 31, 2014 Assets
Shopping Center [Member] | Blackstone II Acquisition [Member]
Business Acquisition [Line Items]
Number of shopping centers	7

X

- Definition

Number of real estate properties acquired.

+ References

No definition available.

+ Details

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Namespace Prefix:	ddr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ddr_ShoppingCenterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ddr_BlackstoneTwoAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: