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Trade and other receivables (Tables)
 12 Months Ended
Dec. 31, 2021
Text Block [Abstract]  
Summary of Trade and Other Receivables
 
         
            2021
$m
         
            2020
$m
  
Trade receivables
a
      
 
399
 
       
 
309
 
Other receivables
       
 
102
 
       
 
129
 
Prepayments
       
 
73
 
       
 
76
 
 
       
 
574
 
       
 
514
 
Summary of Ageing of Trade and Other Receivables
 
        
2021
         
2020
  
         
Gross
$m
     
    Credit loss
allowance
$m
    
              Net
$m
         
Gross
$m
     
    Credit loss
allowance
$m
    
              Net
$m
  
Not past due
       
 
249
 
   
 
(2
) 
  
 
247
 
       
 
153
 
   
 
(1
) 
  
 
152
 
Past due 1 to 30 days
       
 
66
 
   
 
(5
) 
  
 
61
 
       
 
59
 
   
 
(2
) 
  
 
57
 
Past due 31 to 90 days
       
 
52
 
   
 
(7
) 
  
 
45
 
       
 
61
 
   
 
(6
) 
  
 
55
 
Past due 91 to 180 days
       
 
36
 
   
 
(9
) 
  
 
27
 
       
 
40
 
   
 
(7
) 
  
 
33
 
Past due 181 to 360 days
       
 
38
 
   
 
(21
) 
  
 
17
 
       
 
74
 
   
 
(62
) 
  
 
12
 
Past due more than 361 days
       
 
91
 
   
 
(89
) 
  
 
2
 
       
 
n/a
 
   
 
n/a
 
  
 
n/a
 
 
       
 
532
 
   
 
(133
) 
  
 
399
 
       
 
387
 
   
 
(78
) 
  
 
309
 
Summary of movement in allowance for expected lifetime credit losses of trade and other receivables
 
         
           2021
$m
         
           2020
$m
  
Movement in the allowance for expected lifetime credit losses
       
 
 
 
       
 
 
 
At 1 January
       
 
(78
) 
       
 
(18
) 
Fully provided receivables reinstated
       
 
(60
) 
       
 
–
 
Impairment loss
a
      
 
(4
) 
       
 
(40
) 
System Fund impairment reversal/(loss)
       
 
6
 
       
 
(24
) 
Amounts written off
       
 
8
 
       
 
7
 
Exchange and other adjustments
       
 
(5
) 
       
 
(3
) 
At 31 December
       
 
(133
) 
       
 
(78
) 
a
 
The impairment loss on financial assets disclosed on the face of the Group income statement also includes a gain of $4m (2020: loss of $48m) related to trade deposits and loans.
Summary of Maximum Exposure to Credit Risk for Trade and Other Receivables Excluding Prepayments by Geographic Region
 
         
              2021
$m
         
              2020
$m
  
Americas
       
 
275
 
       
 
212
 
EMEAA
       
 
172
 
       
 
183
 
Greater China
       
 
54
 
       
 
43
 
 
       
 
501
 
       
 
438