Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
KimPru and KimPru II [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable	$ 921.9		$ 923.4
Average Interest Rate	5.53%		5.53%
Average Remaining Term	29 months 3 days	[1]	35 months	[1]
KIR [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable	881.0		889.1
Average Interest Rate	5.05%		5.05%
Average Remaining Term	69 months 6 days	[1]	75 months 3 days	[1]
Kimstone [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable	734.4		749.9
Average Interest Rate	4.56%		4.62%
Average Remaining Term	33 months 21 days	[1]	39 months 9 days	[1]
BIG Shopping Centers [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable	406.2		406.5
Average Interest Rate	5.36%		5.39%
Average Remaining Term	37 months 9 days	[1]	40 months 3 days	[1]
CPP [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable	113.1		138.6
Average Interest Rate	5.14%		5.23%
Average Remaining Term	16 months 6 days	[1]	19 months	[1]
Kimco Income Fund [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable			158.0
Average Interest Rate			5.45%
Average Remaining Term			8 months 21 days	[1]
SEB Immobilien [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable	243.8		243.8
Average Interest Rate	5.11%		5.11%
Average Remaining Term	37 months 9 days	[1]	43 months 9 days	[1]
RioCan [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable	727.0		743.7
Average Interest Rate	4.57%		4.59%
Average Remaining Term	42 months 12 days	[1]	48 months	[1]
Other Institutional Programs [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable	241.2		272.9
Average Interest Rate	5.36%		5.32%
Average Remaining Term	25 months 6 days	[1]	31 months	[1]
Other Joint Venture Programs [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable	977.8		1,063.1
Average Interest Rate	5.38%		5.53%
Average Remaining Term	62 months 24 days	[1]	60 months 18 days	[1]
All Equity Method Investments [Member]
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items]
Mortgages and Notes Payable	$ 5,246.4		$ 5,589.0

[1] Average Remaining Term includes extension options