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Note 15 - Debt - Short-term and Long-term Debt (Details) (Parentheticals) - USD ($)
$ in Millions
Dec. 31, 2021
May 03, 2021
Dec. 31, 2020
The 4.125% Senior Note Maturing September 12, 2022 [Member]      
Interest rate 4.125%   4.125%
Unamortized discount, current $ 0.4    
Unamortized discount     $ 1.1
The 5.800% Senior Note [Member]      
Interest rate   5.80% 5.80%
Unamortized discount     $ 0.1
The 3.625% Senior Note [Member]      
Interest rate 3.625%   3.625%
Unamortized discount $ 10.3   $ 10.7
The 4.125% Senior Note [Member]      
Interest rate 4.125%   4.125%
Unamortized discount (premium) $ (10.9)   $ (12.4)
The 4.000% Senior Note [Member]      
Interest rate 4.00%   4.00%
Unamortized discount $ 4.1   $ 5.4
The 5.500% Senior Note [Member]      
Interest rate 5.50%   5.50%
Unamortized discount $ 4.1   $ 4.3