Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Investment Details (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013		Jun. 30, 2013
Schedule of Equity Method Investments [Line Items]
Total GLA	915	[1]
KimPru and KimPru II [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest	15.00%	[2],[3]	15.00%	[2],[3]
Number of Properties	60	[2],[3]	60	[2],[3]
Total GLA	10,600,000	[2],[3]	10,600,000	[2],[3]
Gross Investment In Real Estate (in Dollars)	$ 2,726.4	[2],[3]	$ 2,724.0	[2],[3]
The Company's Investment (in Dollars)	179.8	[2],[3]	179.7	[2],[3]
KIR [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest	48.60%	[2],[4]	48.60%	[2],[4]
Number of Properties	56	[2],[4]	57	[2],[4]
Total GLA	11,700,000	[2],[4]	12,000,000	[2],[4]
Gross Investment In Real Estate (in Dollars)	1,486.2	[2],[4]	1,496.0	[2],[4]
The Company's Investment (in Dollars)	162.5	[2],[4]	163.6	[2],[4]
Kimstone [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest	33.30%	[2]	33.30%	[2]	33.30%
Number of Properties	39	[2]	39	[2]
Total GLA	5,600,000	[2]	5,600,000	[2]
Gross Investment In Real Estate (in Dollars)	1,095.2	[2]	1,095.3	[2]
The Company's Investment (in Dollars)	95.2	[2]	100.3	[2]
BIG Shopping Centers [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest	37.90%	[2],[5]	37.90%	[2],[5]
Number of Properties	21	[2],[5]	21	[2],[5]
Total GLA	3,400,000	[2],[5]	3,400,000	[2],[5]
Gross Investment In Real Estate (in Dollars)	520.4	[2],[5]	520.1	[2],[5]
The Company's Investment (in Dollars)	29.9	[2],[5]	29.5	[2],[5]
CPP [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest	55.00%	[2]	55.00%	[2]
Number of Properties	6	[2]	6	[2]
Total GLA	2,400,000	[2]	2,400,000	[2]
Gross Investment In Real Estate (in Dollars)	437.4	[2]	437.4	[2]
The Company's Investment (in Dollars)	144.0	[2]	144.8	[2]
Kimco Income Fund [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest	39.50%	[2],[6]	39.50%	[2],[6]
Number of Properties	12	[2],[6]	12	[2],[6]
Total GLA	1,500,000	[2],[6]	1,500,000	[2],[6]
Gross Investment In Real Estate (in Dollars)	289.6	[2],[6]	288.7	[2],[6]
The Company's Investment (in Dollars)	49.9	[2],[6]	50.6	[2],[6]
SEB Immobilien [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest	15.00%	[2]	15.00%	[2]
Number of Properties	13	[2]	13	[2]
Total GLA	1,800,000	[2]	1,800,000	[2]
Gross Investment In Real Estate (in Dollars)	362.1	[2]	361.9	[2]
The Company's Investment (in Dollars)	0.7	[2]	0.9	[2]
Other Institutional Programs [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest		[2],[7],[8]		[2],[7],[8]
Number of Properties	52	[2],[7],[8]	56	[2],[7],[8]
Total GLA	1,700,000	[2],[7],[8]	2,100,000	[2],[7],[8]
Gross Investment In Real Estate (in Dollars)	372.9	[2],[7],[8]	385.3	[2],[7],[8]
The Company's Investment (in Dollars)	13.4	[2],[7],[8]	17.9	[2],[7],[8]
RioCan [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest	50.00%		50.00%
Number of Properties	45		45
Total GLA	9,300,000		9,300,000
Gross Investment In Real Estate (in Dollars)	1,262.4		1,314.3
The Company's Investment (in Dollars)	153.7		156.3
Latin America Portfolio [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest		[9]		[9]
Number of Properties	22	[9]	28	[9]
Total GLA	2,500,000	[9]	3,700,000	[9]
Gross Investment In Real Estate (in Dollars)	183.7	[9]	313.2	[9]
The Company's Investment (in Dollars)	116.2	[9]	156.7	[9]
Other Joint Venture Programs [Member]
Schedule of Equity Method Investments [Line Items]
Average Ownership Interest		[10]		[10]
Number of Properties	73	[10]	75	[10]
Total GLA	11,400,000	[10]	11,500,000	[10]
Gross Investment In Real Estate (in Dollars)	1,516.9	[10]	1,548.9	[10]
The Company's Investment (in Dollars)	253.1	[10]	256.7	[10]
All Equity Method Investments [Member]
Schedule of Equity Method Investments [Line Items]
Number of Properties	399		412
Total GLA	61,900,000		63,900,000
Gross Investment In Real Estate (in Dollars)	10,253.2		10,485.1
The Company's Investment (in Dollars)	$ 1,198.4		$ 1,257.0

[1] Gross leasable area ("GLA")

[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] This venture represents four separate joint ventures, with four separate accounts managed by Prudential Real Estate Investors ("PREI"), three of these ventures are collectively referred to as KimPru and the remaining venture is referred to as KimPru II.

[4] During the three months ended March 31, 2014, KIR sold an operating property for a sales price of $5.3 million. In connection with this transaction, the Company recognized its share of an impairment charge of $0.8 million.

[5] Ownership % is a blended rate

[6] During April 2014, the Company purchased the remaining interest in KIF based on a gross purchase price of $408.0 million, including the assumption of $38.2 million of debt. Additionally, as part of this transaction, the Company repaid $118.9 million of mortgage debt encumbering nine of the properties. As a result of this transaction, the Company will consolidate these properties.

[7] During the three months ended March 31, 2014, the Company acquired three properties from a joint venture in which the Company has a noncontrolling interest for a total sales price of $93.2 million. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance. As such, the Company recognized a gain of $3.7 million from the fair value adjustment associated with the Company's original ownership due to a change in control and now consolidates these operating properties.

[8] During the three months ended March 31, 2014, a joint venture in which the Company holds a noncontrolling interest sold an operating property for a sales price of $11.3 million and recognized a gain of $0.3 million. The Company's share of this gain was $0.1 million.

[9] During the three months ended March 31, 2014, the Company sold its noncontrolling interest in six operating properties located throughout Mexico for a sales price of $106.5 million. The Company recognized a gain of $28.4 million, before income taxes, associated with the transaction.

[10] During the three months ended March 31, 2014, a joint venture in which the Company holds a noncontrolling interest sold two operating properties for an aggregate sales price of $10.0 million and recognized an aggregate gain of $0.5 million. The Company's share of this gain was $0.3 million.