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Non-Controlling Interests, Preferred Shares, Common Shares and Common Shares in Treasury - Additional Information (Detail) (USD $) | 12 Months Ended | 1 Months Ended | 0 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | May 31, 2014 | May 30, 2014
Schedule Of Equity [Line Items] |  |  |  |  |
Operating partnership units outstanding | 1,412,366 us-gaap_OtherOwnershipInterestsUnitsOutstanding | 369,176 us-gaap_OtherOwnershipInterestsUnitsOutstanding |  |  |
Redemption of preferred stock | $ 55,000,000 us-gaap_PaymentsForRepurchaseOfRedeemablePreferredStock | $ 150,000,000 us-gaap_PaymentsForRepurchaseOfRedeemablePreferredStock | $ 170,000,000 us-gaap_PaymentsForRepurchaseOfRedeemablePreferredStock |  |
Write-off of preferred share original issuance costs | 1,943,000 us-gaap_PreferredStockRedemptionPremium | 5,246,000 us-gaap_PreferredStockRedemptionPremium | 5,804,000 us-gaap_PreferredStockRedemptionPremium |  |
Common shares, par value | $ 0.10 us-gaap_CommonStockParOrStatedValuePerShare | $ 0.10 us-gaap_CommonStockParOrStatedValuePerShare |  |  |
Preferred Shares |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Fees paid for issuance of shares |  | 400,000 us-gaap_PaymentsOfStockIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 800,000 us-gaap_PaymentsOfStockIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember |  |
Common Shares |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Fees paid for issuance of shares | 200,000 us-gaap_PaymentsOfStockIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 700,000 us-gaap_PaymentsOfStockIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,100,000 us-gaap_PaymentsOfStockIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Class H cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Redemption of preferred stock |  |  |  | 55,000,000 us-gaap_PaymentsForRepurchaseOfRedeemablePreferredStock / us-gaap_StatementClassOfStockAxis = ddr_ClassHPreferredStockMember |
Cumulative redeemable preferred shares liquidation value |  | $ 500 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = ddr_ClassHPreferredStockMember |  | $ 500.00 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = ddr_ClassHPreferredStockMember |
Cumulative redeemable preferred shares total redemption price per share |  |  |  | $ 504.6094 us-gaap_TemporaryEquityRedemptionPricePerShare / us-gaap_StatementClassOfStockAxis = ddr_ClassHPreferredStockMember |
Redeemable preferred stock dividend per share prorated to redemption date |  |  |  | $ 4.6094 ddr_RedeemablePreferredStockDividendPerShareProratedToRedemptionDate / us-gaap_StatementClassOfStockAxis = ddr_ClassHPreferredStockMember |
Write-off of preferred share original issuance costs |  |  |  | $ 1,900,000 us-gaap_PreferredStockRedemptionPremium / us-gaap_StatementClassOfStockAxis = ddr_ClassHPreferredStockMember |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassHPreferredStockMember | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassHPreferredStockMember |  |  |
Class H Depositary Share [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Cumulative redeemable preferred shares liquidation value |  |  |  |  | $ 25.00 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = ddr_DepositaryShareMember
Cumulative redeemable preferred shares total redemption price per share |  |  |  |  | $ 25.2305 us-gaap_TemporaryEquityRedemptionPricePerShare / us-gaap_StatementClassOfStockAxis = ddr_DepositaryShareMember
Redeemable preferred stock dividend per share prorated to redemption date |  |  |  |  | $ 0.2305 ddr_RedeemablePreferredStockDividendPerShareProratedToRedemptionDate / us-gaap_StatementClassOfStockAxis = ddr_DepositaryShareMember
Class J depositary share [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred share, stated value | $ 500 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = ddr_ClassJDepositaryShareMember |  |  |  |
Redemption date restrictions for depositary shares | Aug. 01, 2017 |  |  |  |
Class K depositary share [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred share, stated value | $ 500 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = ddr_ClassKDepositaryShareMember |  |  |  |
Redemption date restrictions for depositary shares | Apr. 09, 2018 |  |  |  |
Class A cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassAPreferredStockMember |  |  |  |
Class B cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassBPreferredStockMember |  |  |  |
Class C cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassCPreferredStockMember |  |  |  |
Class D cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassDPreferredStockMember |  |  |  |
Class E cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassEPreferredStockMember |  |  |  |
Class F cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassFPreferredStockMember |  |  |  |
Class G cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassGPreferredStockMember |  |  |  |
Class I cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassIPreferredStockMember |  |  |  |
Class J cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Cumulative redeemable preferred shares liquidation value | $ 500 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = ddr_ClassJPreferredStockMember | $ 500 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = ddr_ClassJPreferredStockMember |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassJPreferredStockMember | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassJPreferredStockMember |  |  |
Class K cumulative redeemable preferred shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Cumulative redeemable preferred shares liquidation value | $ 500 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = ddr_ClassKPreferredStockMember | $ 500 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = ddr_ClassKPreferredStockMember |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassKPreferredStockMember | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_ClassKPreferredStockMember |  |  |
Non-Cumulative Preferred Shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred Shares, without par value | 750,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_NoncumulativePreferredStockMember |  |  |  |
Cumulative Voting Preferred Shares [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Preferred Shares, without par value | 2,000,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = ddr_CumulativeVotingPreferredSharesMember |  |  |  |
Chicago, IL [Member] |  |  |  |  |
Schedule Of Equity [Line Items] |  |  |  |  |
Operating Partnership Units Issued | 1,000,000 us-gaap_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1 / invest_InvestmentGeographicRegionAxis = ddr_ChicagoILMember |  |  |  |

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