Note 7 - Investment and Advances in Real Estate Joint Ventures (Details) - Summary of Properties and Land Parcels Disposed of $ in Millions		12 Months Ended
		Dec. 31, 2015 USD ($)		Dec. 31, 2014 USD ($)		Dec. 31, 2013 USD ($)
KimPru and KimPru II [Member]
Note 7 - Investment and Advances in Real Estate Joint Ventures (Details) - Summary of Properties and Land Parcels Disposed of [Line Items]
Number of properties		7				1	[1]
Number of land parcels		1					[1]
Aggregate sales price (in Dollars)		$ 143.5				$ 15.8	[1]
KIR [Member]
Note 7 - Investment and Advances in Real Estate Joint Ventures (Details) - Summary of Properties and Land Parcels Disposed of [Line Items]
Number of properties		5		3		1
Number of land parcels		0		0		0
Aggregate sales price (in Dollars)		$ 84.6		$ 19.7		$ 30.0
BIG Shopping Centers [Member]
Note 7 - Investment and Advances in Real Estate Joint Ventures (Details) - Summary of Properties and Land Parcels Disposed of [Line Items]
Number of properties		4		15	[2]
Number of land parcels		0		0	[2]
Aggregate sales price (in Dollars)		$ 75.0		$ 166.6	[2]
Other Institutional Programs [Member]
Note 7 - Investment and Advances in Real Estate Joint Ventures (Details) - Summary of Properties and Land Parcels Disposed of [Line Items]
Number of properties		44	[3]	28	[4]	2	[5]
Number of land parcels		0	[3]	0	[4]		[5]
Aggregate sales price (in Dollars)		$ 171.5	[3]	$ 846.6	[4]	$ 46.9	[5]
RioCan [Member]
Note 7 - Investment and Advances in Real Estate Joint Ventures (Details) - Summary of Properties and Land Parcels Disposed of [Line Items]
Number of properties	[6]	32
Number of land parcels	[6]	1
Aggregate sales price (in Dollars)	[6]	$ 1,390.4
Latin America Portfolio [Member]
Note 7 - Investment and Advances in Real Estate Joint Ventures (Details) - Summary of Properties and Land Parcels Disposed of [Line Items]
Number of properties		4		14		104
Number of land parcels		9		0		0
Aggregate sales price (in Dollars)		$ 16.2		$ 324.5		$ 945.4
Other Joint Venture Programs [Member]
Note 7 - Investment and Advances in Real Estate Joint Ventures (Details) - Summary of Properties and Land Parcels Disposed of [Line Items]
Number of properties		6	[7]	19	[8]	9	[9]
Number of land parcels		0	[7]	0	[8]	0	[9]
Aggregate sales price (in Dollars)		$ 123.7	[7]	$ 252.0	[8]	$ 1,095.9	[9]

[1] The Company acquired the remaining interest in this property.

[2] The Company acquired the remaining interest in seven of these properties. See Footnote 3 for the operating properties acquired by the Company.

[3] The Company acquired the remaining interest in two of these properties. See Footnote 3 for the operating properties acquired by the Company.

[4] The Company acquired the remaining interest in 26 of these properties. See Footnote 3 for the operating properties acquired by the Company.

[5] The Company acquired the remaining interest in these two properties.

[6] The Company sold its interest in 32 operating properties and one land parcel which resulted in an aggregate gain to the Company of $373.8 million (CAD $493.9 million). The aggregate sales price does not reflect the consideration received, but rather represents the full implied fair value of the assets sold determined by the proportionate share of the interest acquired.

[7] The Company acquired the remaining interest in two of these properties and entered into an agreement to acquire the remaining interest in one of these properties. See Footnote 3 for the operating properties acquired by the Company.

[8] The Company acquired the remaining interest in one of these properties. See Footnote 3 for the operating properties acquired by the Company.

[9] The Company acquired the remaining interest in two of these properties.