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Senior Notes - Additional Information (Detail) (USD $)	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 31, 2015
Debt Instrument [Line Items]
Repayments of term loan	$ 492,076,000us-gaap_RepaymentsOfLongTermDebt	$ 49,932,000us-gaap_RepaymentsOfLongTermDebt
Debt extinguishment costs	3,300,000us-gaap_WriteOffOfDeferredDebtIssuanceCost
3.625% Senior Unsecured Notes Due February 2025 [Member]
Debt Instrument [Line Items]
Proceeds from unsecured notes payable			500,000,000us-gaap_ProceedsFromUnsecuredNotesPayable / us-gaap_DebtInstrumentAxis = ddr_ThreePointSixTwoFivePercentSeniorUnsecuredNotesDueFebruaryTwentyTwentyFiveMember
Debt Instrument, Stated Percentage			3.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = ddr_ThreePointSixTwoFivePercentSeniorUnsecuredNotesDueFebruaryTwentyTwentyFiveMember
Debt Instrument Maturity Date			2025-02
Total fees, excluding underwriting discounts, incurred for the issuance of senior notes			1,100,000us-gaap_PaymentsOfDebtIssuanceCosts / us-gaap_DebtInstrumentAxis = ddr_ThreePointSixTwoFivePercentSeniorUnsecuredNotesDueFebruaryTwentyTwentyFiveMember
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Repayments of term loan			350,000,000us-gaap_RepaymentsOfLongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember
Secured Term Loan [Member]
Debt Instrument [Line Items]
Repayments of term loan			$ 100,000,000us-gaap_RepaymentsOfLongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember

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- Definition

Debt instruments maturity date, month and year.

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (e)

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- Definition

The cash inflow from borrowings supported by a written promise to pay an obligation that is uncollateralized (where debt is not backed by the pledge of collateral).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228



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-Topic 230

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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-Publisher FASB

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-Topic 225

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-Section S99

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