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Employee Benefit Obligations - Life Expectancies for Defined Benefit Pension Plans (Details)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Current pensioners (at age 65) – male    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 21 years 9 months 18 days 22 years 3 months 18 days
Current pensioners (at age 65) – female    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 23 years 7 months 6 days 24 years
Future pensioners (current age 45) – male    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 23 years 6 months 24 years
Future pensioners (current age 45) – female    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 25 years 2 months 12 days 25 years 8 months 12 days
North America | Current pensioners (at age 65) – male    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 22 years  
North America | Current pensioners (at age 65) – female    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 23 years 4 months 24 days  
North America | Future pensioners (current age 45) – male    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 23 years 4 months 24 days  
North America | Future pensioners (current age 45) – female    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 24 years 9 months 18 days  
United Kingdom | Current pensioners (at age 65) – male    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 23 years 4 months 24 days  
United Kingdom | Current pensioners (at age 65) – female    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 24 years 10 months 24 days  
United Kingdom | Future pensioners (current age 45) – male    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 25 years 4 months 24 days  
United Kingdom | Future pensioners (current age 45) – female    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 27 years  
Western Continental Europe | Current pensioners (at age 65) – male    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 21 years 1 month 6 days  
Western Continental Europe | Current pensioners (at age 65) – female    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 24 years 2 months 12 days  
Western Continental Europe | Future pensioners (current age 45) – male    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 23 years 4 months 24 days  
Western Continental Europe | Future pensioners (current age 45) – female    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 26 years  
Other | Current pensioners (at age 65) – male    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 20 years 3 months 18 days  
Other | Current pensioners (at age 65) – female    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 25 years 1 month 6 days  
Other | Future pensioners (current age 45) – male    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 20 years 3 months 18 days  
Other | Future pensioners (current age 45) – female    
Disclosure of defined benefit plans [line items]    
Actuarial assumption of life expectancy 25 years 1 month 6 days