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Summary of Significant Accounting Policies - Summary of Estimated Net Future Amortization Income Associated with Above and Below-Market Leases (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Above And Below Market Lease Future Amortization Income [Abstract]
2016	$ 4.3
2017	5.4
2018	7.0
2019	7.9
2020	$ 8.0

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- Definition

Above and below market lease future amortization income.

+ References

No definition available.

+ Details

Name:	ddr_AboveAndBelowMarketLeaseFutureAmortizationIncomeAbstract
Namespace Prefix:	ddr_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

The amount of amortization income, net associated with above and below market leases expected to be recognized during year five of the five succeeding fiscal years.

+ References

No definition available.

+ Details

Name:	ddr_FutureAmortizationIncomeYearFive
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of amortization income, net associated with above and below market leases expected to be recognized during year four of the five succeeding fiscal years.

+ References

No definition available.

+ Details

Name:	ddr_FutureAmortizationIncomeYearFour
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of amortization income, net associated with above and below market leases expected to be recognized during year one of the five succeeding fiscal years.

+ References

No definition available.

+ Details

Name:	ddr_FutureAmortizationIncomeYearOne
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of amortization income, net associated with above and below market leases expected to be recognized during year three of the five succeeding fiscal years.

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No definition available.

+ Details

Name:	ddr_FutureAmortizationIncomeYearThree
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of amortization income, net associated with above and below market leases expected to be recognized during year two of the five succeeding fiscal years.

+ References

No definition available.

+ Details

Name:	ddr_FutureAmortizationIncomeYearTwo
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration