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Note 4 - Investments in and Advances to Real Estate Joint Ventures - Investment Details (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Kim Pru and Kim Pru II [Member] |  |  |
Average ownership interest |  | 15.00% |
The company's investment |  | $ 143.0 | $ 153.6
Kimco Income Fund [Member] |  |  |
Average ownership interest |  | 52.10% |
The company's investment |  | $ 286.2 | 281.5
CPP [Member] |  |  |
Average ownership interest |  | 55.00% |
The company's investment |  | $ 205.1 | 190.8
Other Institutional Joint Ventures [Member] |  |  |
The company's investment |  | 250.9 | 256.8
Other Joint Venture Programs [Member] |  |  |
The company's investment |  | 213.6 | 208.9
All Equity Method Investments [Member] |  |  |
The company's investment | [1] | $ 1,098.8 | $ 1,091.6
[1] | Representing 108 property interests and 21.9 million square feet of GLA, as of June 30, 2023, and 111 property interests and 22.4 million square feet of GLA, as of December 31, 2022.

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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/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + Details
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- Definition Amount, before accumulated depreciation, of real estate investment by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Excludes real estate not held as investment or interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 970 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Column E)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479438/970-360-S99-1 + Details
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