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Assets and liabilities classified as held for sale (Tables)
 12 Months Ended
Dec. 31, 2019
Text block [abstract]  
Summary of assets and liabilities classified as held for sale
On reclassification as held for sale there was no change to the carrying value.
 
 
  
2019
$m
 
Assets and liabilities classified as held for sale
  
   
 
  
 
 
 
Assets classified as held for sale:
  
   
 
  
 
 
 
Property, plant and equipment
  
 
3
 
 
  
 
 
 
Right-of-use
assets
  
 
15
 
 
  
 
 
 
Trade and other receivables
  
 
1
 
 
  
 
 
 
 
  
 
19
 
 
  
 
 
 
Liabilities classified as held for sale:
  
   
 
  
 
 
 
Trade and other payables
  
 
(2
) 
 
  
 
 
 
Lease liabilities
  
 
(20
) 
 
  
 
 
 
 
  
 
(22
)