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Plant Closure Provisions (Tables)
12 Months Ended
Dec. 31, 2020
Restructuring and Related Activities [Abstract]  
Movements in Plant Closure and Restructuring Provisions
Movements in the provisions are summarized as follows:
 
(in millions)
  
2020
   
2019
   
2018
 
Total at January 1
   $ 49.3     $ 49.5     $ 46.1  
Charge for the period excluding restructuring
     5.1       4.4       6.8  
Restructuring (see Note 5)
     7.5       0.0       0.0  
Utilized in the period
     (4.1     (4.4     (3.1
Exchange effect
     0.7       (0.2     (0.3
Total at December 31
     58.5       49.3       49.5  
Due within one year
     (6.6     (5.6     (5.9
    
 
 
   
 
 
   
 
 
 
Due after one year
   $ 51.9     $ 43.7     $ 43.6