Note 5 - Investments in and Advances to Real Estate Joint Ventures - Investment Details (Details) - USD ($) $ in Millions		Mar. 31, 2024	Dec. 31, 2023
Kim Pru and Kim Pru II [Member]
Average ownership interest		15.00%
The company's investment		$ 134.7	$ 138.7
Kimco Income Fund [Member]
Average ownership interest		52.10%
The company's investment		$ 287.4	286.3
R2G Venture LLC [Member]
Average ownership interest	[1]	51.50%
The company's investment	[1]	$ 425.6	0.0
CPP [Member]
Average ownership interest		55.00%
The company's investment		$ 205.5	204.6
Other Institutional Joint Ventures [Member]
The company's investment		245.0	247.5
Other Joint Venture Programs [Member]
The company's investment	[2]	218.7	210.7
All Equity Method Investments [Member]
The company's investment	[3]	$ 1,516.9	$ 1,087.8

[1] In connection with the RPT Merger, the Company acquired ownership in two unconsolidated joint ventures, which have a provisional fair market value of $425.9 million and $7.4 million at the time of Merger. These joint ventures represent 13 property interests and 49 net leased properties.

[2] In connection with the RPT Merger, the Company acquired ownership in an unconsolidated joint venture, which has a provisional fair market value of $7.4 million at the time of Merger, representing 49 other property interests.

[3] Representing 117 property interests, 48 other property interests and 25.0 million square feet of GLA, as of March 31, 2024, and 104 property interests and 21.1 million square feet of GLA, as of December 31, 2023.