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Quarterly Results of Operations - Summary of Quarterly Results of Operations (Parenthetical) (Detail) $ in Millions	3 Months Ended
	Dec. 31, 2014 USD ($)
Quarterly Financial Information Disclosure [Abstract]
Impairment charges	$ 32.6

X

- Definition

Amount of write-down of assets recognized into earnings included in continuing operations and discontinued operations and the equity method investment other than temporary impairment.

+ References

No definition available.

+ Details

Name:	ddr_ImpairmentChargesIncludingInvestments
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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