Note 4 - Investments In and Advances to Real Estate Joint Ventures - Investment Details (Details) - USD ($) $ in Millions		Mar. 31, 2021	Dec. 31, 2020
Kim Pru and Kim Pru II [Member]
Average ownership interest		15.00%
The company's investment		$ 175.7	$ 175.1
Kimco Income Fund [Member]
Average ownership interest	[1]	48.60%
The company's investment	[1]	$ 179.0	177.4
CPP [Member]
Average ownership interest	[1]	55.00%
The company's investment	[1]	$ 161.7	159.7
Other Joint Venture Programs [Member]
The company's investment		76.4	78.5
All Equity Method Investments [Member]
The company's investment	[2]	$ 592.8	$ 590.7

[1] The Company manages these joint venture investments and, where applicable, earns property management fees, construction management fees, property acquisition and disposition fees, leasing management fees and asset management fees.

[2] Representing 95 property interests and 21.3 million square feet of GLA, as of March 31, 2021, and 97 property interests and 21.2 million square feet of GLA, as of December 31, 2020.