Note 4 - Investment In and Advances to Real Estate Joint Ventures - Investment Details (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Kim Pru and Kim Pru II [Member]
Average ownership interest		15.00%
The company's investment		$ 144.4	$ 153.6
Kimco Income Fund [Member]
Average ownership interest		52.10%
The company's investment		$ 283.3	281.5
CPP [Member]
Average ownership interest		55.00%
The company's investment		$ 196.7	190.8
Other Institutional Joint Ventures [Member]
The company's investment		253.5	256.8
Other Joint Venture Programs [Member]
The company's investment		214.6	208.9
All Equity Method Investments [Member]
The company's investment	[1]	$ 1,092.5	$ 1,091.6

[1] Representing 108 property interests and 21.9 million square feet of GLA, as of March 31, 2023, and 111 property interests and 22.4 million square feet of GLA, as of December 31, 2022.