Note 8 - Derivative Instruments - Fair Value of Forward and Put Option Contracts (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Other Current Assets [Member]
Derivative [Line Items]
Current derivatives assets	$ 7.3	$ 1.2
Contracts in liability position	0.0	0.0
Net asset (liability)	7.3	1.2
Other Noncurrent Assets [Member]
Derivative [Line Items]
Current derivatives assets	1.4	0.1
Contracts in liability position	0.0	0.0
Net asset (liability)	1.4	0.1
Current derivatives liability [Member]
Derivative [Line Items]
Current derivatives assets	0.0	0.0
Contracts in liability position	0.0	(12.1)
Net asset (liability)	0.0	(12.1)
Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Current derivatives assets	0.0	0.0
Contracts in liability position	0.0	(2.5)
Net asset (liability)	$ 0.0	$ (2.5)