Note 4 - Investments in and Advances to Real Estate Joint Ventures - Investment Details (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Kim Pru and Kim Pru II [Member]
Average ownership interest	[1],[2]	15.00%	15.00%
Number of properties	[1],[2]	46	48
The company's investment	[1],[2]	$ 179.0	$ 182.5
Kimco Income Fund [Member]
Average ownership interest	[2]	48.60%	48.60%
Number of properties	[2]	44	45
The company's investment	[2]	$ 149.6	$ 145.2
CPP [Member]
Average ownership interest	[2]	55.00%	55.00%
Number of properties	[2]	5	5
The company's investment	[2]	$ 122.4	$ 111.8
Other Joint Venture Programs [Member]
Number of properties		31	37
The company's investment		$ 58.4	$ 64.7
All Equity Method Investments [Member]
Number of properties	[3]	126	135
The company's investment	[3]	$ 509.4	$ 504.2

[1] Represents four separate joint ventures, with four separate accounts managed by Prudential Global Investment Management ("PGIM"), three of these ventures are collectively referred to as KimPru and the remaining venture is referred to as KimPru II.

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

[3] Representing 24.6 million and 26.2 million square feet of GLA, as of September 30, 2017 and December 31, 2016, respectively.