Note 4 - Dispositions of Real Estate (Details) In Millions, unless otherwise specified	12 Months Ended										12 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended							12 Months Ended			12 Months Ended				12 Months Ended					12 Months Ended
	Dec. 31, 2014 USD ($)		Dec. 31, 2013 USD ($)		Dec. 31, 2012 USD ($)		Dec. 31, 2012 Seller Financing [Member] Additional Dispositions [Member] Land Parcels [Member]	Dec. 31, 2012 Seller Financing [Member] Land Parcels [Member]	Dec. 31, 2012 Initial [Member] Additional Dispositions [Member] Operating Properties [Member]	Dec. 31, 2012 Initial Dispositions [Member] Outparcel [Member]	Dec. 31, 2014 Initial Dispositions [Member] Operating Properties [Member] USD ($)	Dec. 31, 2012 Initial Dispositions [Member] Operating Properties [Member] USD ($)	Dec. 31, 2013 Initial Dispositions [Member] Operating Properties [Member]	Dec. 31, 2012 Initial Dispositions [Member] Outparcel [Member] USD ($)	Dec. 31, 2013 Initial Dispositions [Member] Outparcel [Member]	Dec. 31, 2012 Initial Dispositions [Member] Outparcels and Land Parcels [Member] USD ($)	Dec. 31, 2012 Initial Dispositions [Member] After First Six Months 7.5% [Member]	Dec. 31, 2013 Initial Dispositions [Member] USD ($)	Dec. 31, 2012 Initial Dispositions [Member] USD ($)	Dec. 31, 2012 Additional Dispositions [Member] Land Parcels [Member] USD ($)	Dec. 31, 2012 Additional Dispositions [Member] Land Parcels [Member] MXN	Dec. 31, 2013 Additional Dispositions [Member] Latin America Portfolio [Member] USD ($)	Dec. 31, 2013 Additional Dispositions [Member] BRAZIL	Dec. 31, 2012 Outparcel [Member]	Dec. 31, 2012 Additional [Member] MXN	Dec. 31, 2014 Disposed Operating Properties [Member] Latin America [Member]	Dec. 31, 2014 Disposed Operating Properties [Member]	Dec. 31, 2014 Operating Properties [Member] MEXICO USD ($)	Dec. 31, 2014 Operating Properties [Member] USD ($)	Dec. 31, 2013 Operating Properties [Member]	Dec. 31, 2012 Land Parcels [Member] First Six Months 6.5% [Member]	Dec. 31, 2013 Land Parcels [Member] USD ($)	Dec. 31, 2012 Land Parcels [Member] USD ($)	Dec. 31, 2014 London Interbank Offered Rate (LIBOR) [Member] Latin America [Member]	Dec. 31, 2014 London Interbank Offered Rate (LIBOR) [Member]	Dec. 31, 2014 Maximum [Member]	Dec. 31, 2012 Joint Venture in which the Company has a 20% Noncontrolling Interest [Member] USD ($)
Note 4 - Dispositions of Real Estate (Details) [Line Items]
Number of Real Estate Properties							1	1		2		62	36		3							8	2	2		27	90			4		9	2
Sales of Real Estate												$ 418.9				$ 4.1		$ 279.5		$ 1.9	24.3	$ 115.4							$ 833.5			$ 18.2					$ 55.5
Gain (Loss) on Sale of Properties											203.3					2.0		25.4	85.9	0.4		23.3			5.7							11.5					10.0
Impairment of Real Estate														22.5				61.9				26.9							178.0
Foreign Currency Transaction Gain (Loss), Realized	(92.9)	[1]	(5.1)	[1]		[1]																(7.8)						(92.9)
Financing Receivable, Net	52.7											4.2																					1.8
Debt Instrument, Basis Spread on Variable Rate																																		2.50%	0.925%
Financing Receivable, Stated Interest Rate									6.00%								7.50%														6.50%					7.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																																					20.00%
Deferred Gain on Sale of Property																																					$ 2.0
Financing Receivable, Term																																	6 years

[1] Due to the substantial liquidation of its investment in Mexico, the Company recognized a loss from foreign currency translation related to consolidated properties in the amount of $92.9 million, before noncontrolling interest of $5.8 million. (See footnote 22 for additional disclosure).