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Note 10 - Debt - Short-term and Long-term Debt (Details) (Parentheticals) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
The 3.625% Senior Note [Member]    
Interest rate 3.625% 3.625%
Unamortized discount (premium) $ 10.1 $ 10.3
The 4.125% Senior Note [Member]    
Interest rate 4.125% 4.125%
Unamortized discount (premium) $ 9.7 $ 10.9
The 4.000% Senior Note [Member]    
Interest rate 4.00% 4.00%
Unamortized discount $ 3.3 $ 4.1
The 5.500% Senior Note [Member]    
Interest rate 5.50% 5.50%
Unamortized discount $ 4.0 $ 4.1
The 4.125% Senior Note [Member]    
Interest rate   4.125%
Unamortized discount   $ 0.4