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Other Intangible Assets
 3 Months Ended
Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Other Intangible Assets
NOTE 5 – 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
      (1.1 ) 
    
 
 
  
Gross cost at March 31
      294.1  
    
 
 
  
Accumulated amortization at January 1
      (237.7 ) 
Amortization expense
      (4.0 ) 
Exchange effect
      0.6  
    
 
 
  
Accumulated amortization at March 31
      (241.1 ) 
    
 
 
  
Net book amount at March 31
    $ 53.0  
    
 
 
  
The amortization expense for the three months ended March 31, 2022 was $4.0 million (three months ended March 31, 2021 – $4.0 million).