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Post-employment benefits for associates - Additional information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of defined benefit plans [line items]        
Weighted average duration of defined benefit obligation (in years)   12 years 4 months 24 days 11 years 7 months 6 days  
Defined contribution plans charges   $ 151 $ 144 $ 133
United Kingdom | Pension plans | Foreign countries        
Disclosure of defined benefit plans [line items]        
Maximum number of years to eliminate shortfall (in years)   10 years    
Provisions and Other Non-current Liabilities        
Disclosure of defined benefit plans [line items]        
Gain (loss) on plan amendment $ (15)      
Other Income        
Disclosure of defined benefit plans [line items]        
Increase (decrease) in DBO $ (15)      
Benefit obligation        
Disclosure of defined benefit plans [line items]        
Top four countries (as a percent)   88.00%    
Benefit obligation | United States | Other post-employment benefit plans        
Disclosure of defined benefit plans [line items]        
Associates covered (as a percent)   98.00%