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Senior Notes - Summary of Fixed-Rate Senior Notes (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Senior notes	$ 2,425,200,000ddr_SeniorNotes1	$ 2,425,200,000ddr_SeniorNotes1
Debt premium	700,000us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet	200,000us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
Total Senior notes	2,765,893,000us-gaap_SeniorNotes	2,754,120,000us-gaap_SeniorNotes
Debt Instrument, Stated Percentage Rate, Minimum	3.375%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
Debt Instrument, Stated Percentage Rate, Maximum	9.625%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
Debt Instrument Effective Interest Rate Minimum	3.50%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum
Debt Instrument Effective Interest Rate Maximum	9.90%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum
Maturity Date Range, Start	May 15, 2015
Maturity Date Range, End	May 15, 2023
Senior Convertible Notes due 2040 [Member]
Debt Instrument [Line Items]
Senior convertible notes	$ 340,046,000us-gaap_ConvertibleDebt / us-gaap_LongtermDebtTypeAxis = ddr_SeniorConvertibleNotesDueTwoZeroFourZeroMember	$ 328,669,000us-gaap_ConvertibleDebt / us-gaap_LongtermDebtTypeAxis = ddr_SeniorConvertibleNotesDueTwoZeroFourZeroMember
Debt Instrument, Stated Percentage	1.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = ddr_SeniorConvertibleNotesDueTwoZeroFourZeroMember
Debt Instrument Effective Interest Rate	5.30%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = ddr_SeniorConvertibleNotesDueTwoZeroFourZeroMember
Debt Instrument, Maturity Date	Nov. 15, 2040

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Senior Notes not including discount or accretion.

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Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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When presenting a range of interest rates, the highest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Maximum contractual interest rate for funds borrowed, under the debt agreement.

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Minimum contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Latest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

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Earliest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

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The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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