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Other Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Other Intangible Assets
The following table analyzes other intangible assets movements in the year:
 
(in millions)
  
2022
 
Gross cost at January 1
   $ 295.2  
Exchange effect
     (6.3
    
 
 
 
Gross cost at September 30
     288.9  
    
 
 
 
Accumulated amortization at January 1
     (237.7
Amortization expense
     (11.4
Exchange effect
     3.8  
    
 
 
 
Accumulated am
o
rtization at September 30
     (245.3
    
 
 
 
Net book amount at September 30
   $ 43.6