XML 116 R100.htm IDEA: XBRL DOCUMENT v3.8.0.1

Income Taxes - Summary of Differences Between Total Income Tax Expense Statutory Federal Income Tax Rate (Parenthetical) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
TRS [Member]
Income Tax Expense Benefit [Line Items]
Deferred tax impact of federal rate change	$ 19.4

X

- Definition

Amount of overall deferred tax impact of federal rate change.

+ References

No definition available.

+ Details

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

X

- Definition

Income tax expense benefit.

+ References

No definition available.

+ Details

Name:	ddr_IncomeTaxExpenseBenefitLineItems
Namespace Prefix:	ddr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConsolidatedEntitiesAxis=us-gaap_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: