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Note 14 - Composition of Certain Financial Statement Caption (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
  

2023

  

2022

 

Accounts payable and accrued liabilities:

        

Accrued salaries, benefits and other related costs

 $149.4  $117.4 

Escrow liabilities

  3.9   0.4 

Accrued interest

  19.1   16.3 

Trade accounts payable and other accrued expenses

  158.4   128.7 

Acquisition-related liabilities

  10.0   30.0 

Total accounts payable and accrued liabilities

 $340.8  $292.8 
Schedule of Other Assets, Noncurrent [Table Text Block]
  

2023

  

2022

 

Other noncurrent assets:

        

Pension benefits

 $121.4  $89.0 

Other assets - prepaid expenses

  73.2   50.7 

Investments in nonpublic companies

  231.4   229.8 

State income tax receivable

  67.7   - 

Deposits and other

  2.4   1.9 

Total other noncurrent assets

 $496.1  $371.4