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Impairment Charges and Impairment of Joint Venture Investments - Impairment Charges on Assets or Investments (Detail) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Impairment Charges And Impairment Of Joint Venture Investments [Abstract]
Land held for development			$ 13,200,000ddr_LandHeldForDevelopment	$ 0ddr_LandHeldForDevelopment	$ 10,100,000ddr_LandHeldForDevelopment
Undeveloped land			5,400,000ddr_UndevelopedLand	3,000,000ddr_UndevelopedLand	20,100,000ddr_UndevelopedLand
Assets marketed for sale			10,600,000ddr_AssetsMarketedForSale	16,000,000ddr_AssetsMarketedForSale	16,600,000ddr_AssetsMarketedForSale
Total continuing operations			29,175,000us-gaap_AssetImpairmentCharges	19,044,000us-gaap_AssetImpairmentCharges	46,741,000us-gaap_AssetImpairmentCharges
Sold assets or assets held for sale – discontinued operations			8,877,000ddr_ImpairmentsSoldAssetsOrAssetsHeldForSaleInDiscontinuedOperations	53,553,000ddr_ImpairmentsSoldAssetsOrAssetsHeldForSaleInDiscontinuedOperations	79,731,000ddr_ImpairmentsSoldAssetsOrAssetsHeldForSaleInDiscontinuedOperations
Joint venture investments			30,652,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment	980,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment	26,671,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
Total impairment charges	$ 32,600,000ddr_ImpairmentChargesIncludingInvestments	$ 6,800,000ddr_ImpairmentChargesIncludingInvestments	$ 68,703,000ddr_ImpairmentChargesIncludingInvestments	$ 73,577,000ddr_ImpairmentChargesIncludingInvestments	$ 153,142,000ddr_ImpairmentChargesIncludingInvestments

X

- Definition

Amount of write-down of assets recognized into earnings attributable to assets marketed for sale.

+ References

No definition available.

+ Details

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- Details

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X

- Definition

Amount of write-down of assets recognized into earnings included in continuing operations and discontinued operations and the equity method investment other than temporary impairment.

+ References

No definition available.

+ Details

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Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of write-down of assets recognized into earnings for assets that have been sold by the reporting entity included in discontinued operations.

+ References

No definition available.

+ Details

Name:	ddr_ImpairmentsSoldAssetsOrAssetsHeldForSaleInDiscontinuedOperations
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of write-down of assets recognized into earnings attributable to land held for development.

+ References

No definition available.

+ Details

Name:	ddr_LandHeldForDevelopment
Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of write-down of assets recognized into earnings attributable to undeveloped land.

+ References

No definition available.

+ Details

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Namespace Prefix:	ddr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228

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Balance Type:	debit
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X

- Definition

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 35

-Paragraph 32

-URI http://asc.fasb.org/extlink&oid=35687916&loc=d3e32787-111569

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