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Acquisitions - Schedule of Acquisitions Terms (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Ownership interest percentage	100.00%
Ownership interest of joint venture partner	95.00%

X

- Definition

Aggregate ownership interest percentage in previous joint venture.

+ References

No definition available.

+ Details

Name:	ddr_AggregateOwnershipInterestPercentageInPreviousJointVenture
Namespace Prefix:	ddr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of ownership of equity participation by the joint venture partner for the investee accounted for under the equity method of accounting.

+ References

No definition available.

+ Details

Name:	ddr_OwnershipInterestOfJointVenturePartner
Namespace Prefix:	ddr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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