Note 4 - Investments In and Advances to Real Estate Joint Ventures - Investment Details (Details) - USD ($) $ in Millions		Mar. 31, 2022	Dec. 31, 2021
Kim Pru and Kim Pru II [Member]
Average ownership interest		15.00%
The company's investment		$ 154.8	$ 163.0
Kimco Income Fund [Member]
Average ownership interest		48.60%
The company's investment		$ 192.3	186.0
CPP [Member]
Average ownership interest		55.00%
The company's investment		$ 175.1	165.1
Other Institutional Joint Ventures [Member]
The company's investment		279.3	281.8
Other Joint Venture Programs [Member]
The company's investment		212.4	211.0
All Equity Method Investments [Member]
The company's investment	[1]	$ 1,013.9	$ 1,006.9

[1] Representing 117 property interests and 24.0 million square feet of GLA, as of March 31, 2022, and 120 property interests and 24.7 million square feet of GLA, as of December 31, 2021.