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Note 8 - Goodwill and Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Goodwill [Table Text Block]
   

Insurance

   

Energy and Specialized Markets

   

Financial Services

   

Total

 

Goodwill at December 31, 2021

  $ 1,454.8     $ 2,401.0     $ 475.4     $ 4,331.2  

Acquisitions(1)

    289.8                   289.8  

Purchase accounting reclassifications

    (0.5 )     0.7             0.2  

Dispositions(2)

          (116.5 )     (473.2 )     (589.7 )

Impairment charge

                (1.7 )     (1.7 )

Foreign currency translation adjustment

    (107.8 )     (265.9 )     (0.5 )     (374.2 )

Goodwill at September 30, 2022

  $ 1,636.3     $ 2,019.3     $     $ 3,655.6  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
 

Weighted Average Useful Life (in years)

 

Cost

   

Accumulated Amortization

   

Net

 

September 30, 2022

                         

Technology-based

7

  $ 527.1     $ (362.4 )   $ 164.7  

Marketing-related

15

    213.2       (101.9 )     111.3  

Contract-based

6

    5.0       (5.0 )      

Customer-related

13

    879.1       (297.2 )     581.9  

Database-based

18

    369.4       (136.8 )     232.6  

Total intangible assets

  $ 1,993.8     $ (903.3 )   $ 1,090.5  

December 31, 2021

                         

Technology-based

7

  $ 576.4     $ (403.3 )   $ 173.1  

Marketing-related

15

    274.1       (129.6 )     144.5  

Contract-based

6

    5.0       (5.0 )      

Customer-related

13

    1,015.4       (426.5 )     588.9  

Database-based

18

    484.2       (164.8 )     319.4  

Total intangible assets

  $ 2,355.1     $ (1,129.2 )   $ 1,225.9  
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Years Ending

 

Amount

 

2022

  $ 35.3  

2023

    138.7  

2024

    133.1  

2025

    110.1  

2026

    106.5  

2027 and thereafter

    566.8  

Total

  $ 1,090.5