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Investments in and Advances to Joint Ventures - Service Fees and Income Earned by Company's Unconsolidated Joint Ventures (Detail) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Equity Method Investments And Joint Ventures [Abstract] |  |
Management and other fees | $ 6.2 | $ 6.3
Development fees and leasing commissions | 1.9 | 1.6
Interest income | $ 8.3 | $ 6.3

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- Definition Service fees and income earned for development and leasing in accordance with management contracts related to equity method investments. + References No definition available. + Details
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Namespace Prefix: | ddr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition This element represents interest earned on the notes receivable from unconsolidated joint ventures accounted for under the equity method. + References No definition available. + Details
Name: | ddr_InterestIncome
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract
Namespace Prefix: | us-gaap_
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- Definition Revenue, comprised of base and incentive revenue derived from the management of joint ventures, managing third-party properties, or another entity's operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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