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Goodwill (Tables)
 6 Months Ended
Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Goodwill
The following table summarizes the goodwill movements in the year:
 
(in millions)
   
Gross Cost
  
Opening balance at January 1, 2022
    $ 364.3  
Exchange effect
      (7.3 ) 
    
 
 
  
Closing balance at June 30, 2022
    $ 357.0