Other Non-Current Assets (Tables)
 12 Months Ended
Dec. 31, 2021
Text block [abstract]  
Summary of Other Non-Current Assets
 
   
December 31,
     
    
                2021
  
                            2020  
   Net defined benefit plan surpluses (see note 26)
 
239
 
128
  
   Cash surrender value of life insurance policies
 
346
 
334
  
   Deferred commissions
 
127
 
105
  
   Other financial assets (see note 19)
 
429
 
198
  
   Other
non-current
assets
(1)
 
85
 
23
  
   Total other
non-current
assets
 
1,226
 
788
  
(1) Includes a tax receivable from HM Revenue & Customs (“HMRC”) of $74 million at December 31, 2021 (see note 30).