Note 18 - Capital Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended		3 Months Ended	5 Months Ended	7 Months Ended	12 Months Ended
	Aug. 31, 2015	Jun. 30, 2015	Jun. 30, 2015	Aug. 31, 2015	Dec. 31, 2015	Dec. 31, 2015	Jun. 18, 2015
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount					$ 202.0	$ 202.0	$ 202.0
Stock Repurchased During Period, Shares	1.8		9.2
Accelerated Share Repurchases, Final Price Paid Per Share				$ 18.32
Convertible Senior Notes Due 2017
Class of Stock [Line Items]
Extinguishment of Debt, Amount		$ 389.1				$ 389.1
Repayments of Convertible Debt		$ 126.8
Debt Conversion, Converted Instrument, Shares Issued		28.4
Convertible Debt, Termination of Capped Call Transaction, Total Consideration		$ 54.9
Convertible Debt, Termination of Capped Call Transaction, Number of Shares Received		2.3
Convertible Debt, Termination of Capped Call Transaction, Total Cash Received					$ 13.2