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Plant Closure Provisions (Tables)
12 Months Ended
Dec. 31, 2019
Restructuring and Related Activities [Abstract]  
Movements in Plant Closure and Restructuring Provisions
Movements in the provisions are summarized as follows:
                         
(
in millions
)
 
2019
 
 
2018
 
 
2017
 
Total at January 1
  $
49.5
    $
46.1
    $
39.5
 
Charge for the period
   
4.4
     
6.8
     
5.9
 
Measurement period adjustment on acquisition
   
0.0
     
0.0
     
2.8
 
Utilized in the period
   
(4.4
)    
(3.1
)    
(2.4
)
Exchange effect
   
(0.2
)    
(0.3
)    
0.3
 
                         
Total at December 31
   
49.3
     
49.5
     
46.1
 
Due within one year
   
(5.6
)    
(5.9
)    
(5.2
)
                         
Due after one year
  $
43.7
    $
43.6
    $
40.9