Effective ownership percentage in an investment accounted for using the equity method.

No definition available.

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- Definition

Number of assets foreclosed and sold during the period.

+ References

No definition available.

+ Details

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- Definition

Number of real estate assets disposed of during the period.

+ References

No definition available.

+ Details

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- Definition

Number of assets in which its investment basis was zero.

+ References

No definition available.

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- Definition

Number of assets foreclosed during the period.

+ References

No definition available.

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- Definition

Number of joint ventures.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of real estate properties acquired.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of transactions.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

The percentage of ownership of equity participation by the joint venture partner for the investee accounted for under the equity method of accounting.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Redemption of preferred equity in full at companys option.

+ References

No definition available.

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- Definition

Weighted-average exchange rate used for recording the equity in net income in U.S. dollars for an investment accounted for using the equity method.

+ References

No definition available.

+ Details

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Data Type:	xbrli:pureItemType
Balance Type:	na
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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the amount of net sales proceeds received on disposal of an equity method investment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 35

-Paragraph 35

-URI http://asc.fasb.org/extlink&oid=35687916&loc=d3e32847-111569

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Data Type:	xbrli:monetaryItemType
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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

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- Definition

The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569643-111683

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

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Investments in and Advances to Joint Ventures - Additional Information (Detail)	12 Months Ended					12 Months Ended	0 Months Ended	12 Months Ended	4 Months Ended	12 Months Ended							12 Months Ended				12 Months Ended
	Dec. 31, 2014 USD ($) Transaction JointVenture	Dec. 31, 2013 USD ($) Transaction JointVenture	Dec. 31, 2014 Shopping Center [Member] ShoppingCenter	Dec. 31, 2013 Shopping Center [Member] ShoppingCenter	Dec. 31, 2012 Shopping Center [Member] ShoppingCenter	Dec. 31, 2014 Chicago Assets	Apr. 28, 2014 Parent Company USD ($)	Dec. 31, 2014 Parent Company USD ($)	Apr. 28, 2014 Sonae Sierra Brazil [Member] BRL ShoppingCenter	Dec. 31, 2013 Sonae Sierra Brazil [Member] BRL	Dec. 31, 2012 Sonae Sierra Brazil [Member] BRL	Dec. 31, 2014 Service Holdings LLC Joint Venture [Member] ShoppingCenter	Dec. 31, 2014 Joint Venture Assets Previously Written Down to Zero [Member] USD ($) Assets	Dec. 31, 2014 Blackstone III [Member]	Dec. 31, 2013 Blackstone II [Member]	Dec. 31, 2014 Coventry II Joint Ventures [Member] USD ($) ShoppingCenter	Dec. 31, 2014 BRE DDR Retail Holdings [Member] Blackstone III [Member]	Dec. 31, 2014 BRE DDR Retail Holdings [Member] Blackstone II [Member]	Dec. 31, 2013 BRE DDR Retail Holdings [Member] Blackstone II [Member]	Dec. 31, 2014 BRE DDR Retail Holdings I [Member] ShoppingCenter	Dec. 31, 2014 Coventry II Westover LLC [Member] USD ($)	Dec. 31, 2014 Unconsolidated Joint Ventures [Member] Shopping Center [Member] ShoppingCenter	Dec. 31, 2013 Unconsolidated Joint Ventures [Member] Shopping Center [Member] ShoppingCenter	Dec. 31, 2012 Unconsolidated Joint Ventures [Member] Shopping Center [Member] ShoppingCenter
Schedule Of Equity Method Investments [Line Items]
Number of retail sites/centers																17
Number of transactions	2ddr_NumberOfTransactions	2ddr_NumberOfTransactions
Number of joint ventures	2ddr_NumberOfJointVentures	2ddr_NumberOfJointVentures
Ownership interest of joint venture partner	95.00%													95.00%	95.00%
Ownership interest in joint venture							50.00%		66.00%								5.00%		5.00%
Redemption of preferred equity in full at companys option																	after seven years
Interest acquired																		95.00%
Number of centers																				1
Proceeds from sale of unconsolidated joint venture assets							$ 343,600,000
Investment interest percentage							33.00%
Gain on Sale of Interests								83,700,000
Gain on sale and change in control of interests								19,700,000
Shopping centers owned			415	416	452				10
Weighted-average exchange rate used for recording the equity in net income									2.26	2.14	1.94
Gain on sale of unconsolidated joint venture assets								4,400,000													18,400,000
Number of properties sold												3										37	27	7
Number of foreclosed asset						1
Investments in and advances to joint ventures	$ 414,848,000	$ 448,008,000											$ 0			$ 900,000
Number of assets foreclosed and sold													4