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Investments in and Advances to Joint Ventures - Schedule of Business Acquisitions (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
BRE DDR Retail Holdings IV [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership interest in joint venture	5.00%
Transaction value, percentage	100.00%
Mortgage debt assumed, percentage	100.00%
New mortgage financings, percentage	100.00%
BRE DDR Retail Holdings III [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership interest in joint venture		5.00%
Transaction value, percentage		100.00%
Mortgage debt assumed, percentage		100.00%
New mortgage financings, percentage		100.00%

X

- Definition

Mortgage debt assumed percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	ddr_
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Balance Type:	na
Period Type:	duration

X

- Definition

Mortgage financings percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	ddr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Total value percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	ddr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- 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=56956515&loc=d3e1392-128463

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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