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Capital and other commitments
 12 Months Ended
Dec. 31, 2022
Text Block [Abstract]  
Capital and other commitments
29. Capital and other commitments
 
            
        2022
$m
            
        2021
$m
  
Contracts placed for expenditure not provided in the Group Financial Statements
            
 
 
 
            
 
 
 
Property, plant and equipment
            
 
5
 
            
 
13
 
Intangible assets
            
 
1
 
            
 
4
 
 
            
 
6
 
            
 
17
 
The Group has also committed to invest a further $6m (2021: $6m) in one of its associates.