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Investments in and Advances to Joint Ventures - Summary of Company's Equity Method Joint Ventures Included in Investments in and Advances (Detail) - Property | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Nov. 30, 2018 | Dec. 31, 2016
Schedule Of Equity Method Investments [Line Items] |  |  |
Effective Ownership Percentage |  |  | 25.00%
DDRTC Core Retail Fund LLC [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Partner | TIAA – CREF |  |
Effective Ownership Percentage | 15.00% |  |
Operating Properties | 23 |  |
DDRM Properties [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Partner | Madison International Realty |  |
Effective Ownership Percentage | 20.00% |  |
Operating Properties | 35 |  |
BRE DDR Retail Holdings III [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Partner | Blackstone Real Estate Partners |  |
Effective Ownership Percentage | 5.00% |  |
Operating Properties | 16 |  |
Dividend Trust Portfolio JV LP [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Partner | Chinese Institutional Investors |  |
Effective Ownership Percentage | 20.00% | 20.00% |
Operating Properties | 10 |  |
BRE DDR Retail Holdings IV [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Partner | Blackstone Real Estate Partners |  |
Effective Ownership Percentage | 5.00% |  |
Operating Properties | 5 |  |
DDR-SAU Retail Fund LLC [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Partner | State of Utah |  |
Effective Ownership Percentage | 20.00% |  |
Operating Properties | 12 |  |
Other Joint Venture Interests [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Partner | Various |  |
Operating Properties | 5 |  |
Minimum [Member] | Other Joint Venture Interests [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Effective Ownership Percentage | 20.00% |  |
Maximum [Member] | Other Joint Venture Interests [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Effective Ownership Percentage | 79.45% |  |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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