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Impairment Charges - Impairment Charges on Assets (Parenthetical) (Detail) - ShoppingCenter	3 Months Ended
	Sep. 30, 2016	Mar. 31, 2015
Operating Shopping Centers [Member]
Schedule Of Investments [Line Items]
Number of properties		25
Minimum [Member]
Schedule Of Investments [Line Items]
Asset disposal period	12 months	12 months
Maximum [Member]
Schedule Of Investments [Line Items]
Asset disposal period	18 months	24 months

X

- Definition

Asset disposal period.

+ References

No definition available.

+ Details

Name:	ddr_AssetDisposalPeriod
Namespace Prefix:	ddr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
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

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

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=ddr_OperatingAssetsImpairedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: