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Performance B.4.2. Pension and other long-term employee benefit plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Long-service plans    
Disclosure of defined benefit plans [line items]    
Requisite service period 5 years  
Termination plans    
Disclosure of defined benefit plans [line items]    
Net defined benefit liability $ 44 $ 51
Currency translation effect, defined benefit plans 7  
Estimate of contributions expected to be paid to plan in future years $ 82 $ 100
Weighted average duration of defined benefit obligation 4 years 4 years
Bottom of range | Long-service plans    
Disclosure of defined benefit plans [line items]    
Requisite service period, additional bonus 5 years  
Top of range | Long-service plans    
Disclosure of defined benefit plans [line items]    
Requisite service period, additional bonus 40 years