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Impairment Charges and Impairment of Joint Venture Investments - Impairment Charges on Assets or Investments (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Impairment Charges And Impairment Of Joint Venture Investments [Abstract]
Assets marketed for sale or asset sold	$ 179,700,000ddr_AssetsMarketedForSale	$ 1,900,000ddr_AssetsMarketedForSale
Undeveloped land previously held for development	99,300,000ddr_UndevelopedLand	400,000ddr_UndevelopedLand
Total continuing operations	279,021,000us-gaap_AssetImpairmentCharges	2,329,000us-gaap_AssetImpairmentCharges
Sold assets – discontinued operations	0ddr_ImpairmentsSoldAssetsOrAssetsHeldForSaleInDiscontinuedOperations	8,512,000ddr_ImpairmentsSoldAssetsOrAssetsHeldForSaleInDiscontinuedOperations
Joint venture investments	0us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment	9,100,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
Total impairment charges	$ 279,000,000ddr_ImpairmentChargesIncludingInvestments	$ 19,900,000ddr_ImpairmentChargesIncludingInvestments

X

- Definition

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

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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

Name:	ddr_ImpairmentChargesIncludingInvestments
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 undeveloped land.

+ References

No definition available.

+ Details

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

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

+ Details

Name:	us-gaap_AssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

+ Details

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Balance Type:	debit
Period Type:	duration