Note 4 - Investments In and Advances to Real Estate Joint Ventures - Investment Details (Details) - USD ($) $ in Millions		Mar. 31, 2020	Dec. 31, 2019
Kim Pru and Kim Pru II [Member]
Average ownership interest	[1]	15.00%
The company's investment	[1]	$ 169.6	$ 169.5
Kimco Income Fund [Member]
Average ownership interest	[1]	48.60%
The company's investment	[1]	$ 177.7	175.0
CPP [Member]
Average ownership interest	[1]	55.00%
The company's investment	[1]	$ 156.6	151.7
Other Joint Venture Programs [Member]
The company's investment	[1]	81.7	81.9
All Equity Method Investments [Member]
The company's investment	[1]	$ 585.6	$ 578.1

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