Note 4 - Investments In and Advances to Real Estate Joint Ventures - Investment Details (Details) - USD ($) $ in Millions		Jun. 30, 2020	Dec. 31, 2019
Kim Pru and Kim Pru II [Member]
Average ownership interest	[1]	15.00%
The company's investment	[1]	$ 170.8	$ 169.5
Kimco Income Fund [Member]
Average ownership interest	[1]	48.60%
The company's investment	[1]	$ 175.8	175.0
CPP [Member]
Average ownership interest	[1]	55.00%
The company's investment	[1]	$ 157.7	151.7
Other Joint Venture Programs [Member]
The company's investment	[1]	81.1	81.9
All Equity Method Investments [Member]
The company's investment	[1]	$ 585.4	$ 578.1

[1] Representing 98 property interests and 21.3 million square feet of GLA, as of both June 30, 2020 and December 31, 2019.