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Capital and other commitments
 12 Months Ended
Dec. 31, 2020
Text block [abstract]  
Capital and other commitments
30. Capital and other commitments
 
   
2020
$m
   2019
$m		 
Contracts placed for expenditure not provided for in the Group  Financial Statements
    
  
 
 
   
 
 
 
Property, plant and equipment
  
 
17
 
   52 
  
 
 
   
 
 
 
Intangible assets
  
 
2
 
   7 
  
 
 
   
 
 
 
  
 
19
 
   59 
  
 
 
   
 
 
 
The Group has also committed to invest a further $6m (2019: $6m) in one of its associates.