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Earnings Per Share - Computation of Company's Earnings Per Share (EPS) and Reconciliation of Net Loss from Continuing Operations and Number of Common Shares Used in Computations of "Basic" EPS and "Diluted" EPS (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Continuing Operations:
Loss from continuing operations	$ (268,008)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	$ (20,300)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
Plus: Gain (loss) on disposition of real estate	25,094us-gaap_GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	(1,090)us-gaap_GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes
Plus: Loss attributable to non-controlling interests	(873)us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	(155)us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity
Preferred dividends	(5,594)us-gaap_PreferredStockDividendsIncomeStatementImpact	(6,608)us-gaap_PreferredStockDividendsIncomeStatementImpact
Less: Earnings attributable to unvested shares and operating partnership units	(437)ddr_EarningsAttributableToUnvestedSharesAndOperatingPartnershipUnits	(310)ddr_EarningsAttributableToUnvestedSharesAndOperatingPartnershipUnits
Loss from continuing operations	(249,818)ddr_BasicIncomeLossFromContinuingOperations	(28,463)ddr_BasicIncomeLossFromContinuingOperations
Discontinued operations:
Income from discontinued operations	0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax	3,012us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Plus: Income attributable to non-controlling interests	0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	1,893us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest
Net loss attributable to common shareholders after allocation to participating securities	$ (249,818)ddr_NetIncomeLossAttributableToCommonShareholdersAfterAllocationToParticipatingSecurities	$ (23,558)ddr_NetIncomeLossAttributableToCommonShareholdersAfterAllocationToParticipatingSecurities
Denominators – Number of Shares
Basic and Diluted – Average shares outstanding	359,818us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	357,634us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Basic Earnings Per Share:
Loss from continuing operations attributable to common shareholders	$ (0.69)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare	$ (0.08)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Income from discontinued operations attributable to common shareholders	$ 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	$ 0.01us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Net loss attributable to common shareholders	$ (0.69)us-gaap_EarningsPerShareBasic	$ (0.07)us-gaap_EarningsPerShareBasic
Diluted Earnings Per Share:
Loss from continuing operations attributable to common shareholders	$ (0.69)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare	$ (0.08)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Income from discontinued operations attributable to common shareholders	$ 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	$ 0.01us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Net loss attributable to common shareholders	$ (0.69)us-gaap_EarningsPerShareDiluted	$ (0.07)us-gaap_EarningsPerShareDiluted

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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Amount of income (loss) from continuing operations attributable to the noncontrolling interest. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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