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Note 3 - Financing Arrangements (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Debt [Table Text Block]
  

December 31,

 
  

2021

  

2020

 

Senior notes

 $1,301.2  $1,305.4 

Less current portion of long-term debt

  (356.0

)

  - 

Total long-term debt

 $945.2  $1,305.4