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Employee Benefit Plans - Change in Benefit Obligations and Fair Value of Plan Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pension Benefits | U.S.      
Change in Benefit Obligation      
Benefit obligation, beginning balance $ 1,525 $ 1,478  
Service cost 49 51 $ 58
Interest cost 76 77 62
Plan participant contributions 0 0  
Plan amendments 0 0  
Business combinations 237  
Actuarial (gain) loss (4) 40  
Benefits paid (98) (121)  
Curtailment 8 0  
Recognition of termination benefits 13 0  
Foreign currency exchange rate change 0 0  
Benefit obligation, ending balance 1,806 1,525 1,478
Accumulated benefit obligation 1,703 1,414  
Change in Fair Value of Plan Assets      
Fair value of plan assets, beginning balance 1,306 1,179  
Actual return on plan assets 66 129  
Company contributions 83 119  
Plan participant contributions 0 0  
Business combinations 199  
Benefits paid (98) (121)  
Foreign currency exchange rate change 0 0  
Fair value of plan assets, ending balance 1,556 1,306 1,179
Funded Status (250) (219)  
Pension Benefits | Int’l.      
Change in Benefit Obligation      
Benefit obligation, beginning balance 2,866 2,776  
Service cost 38 38 47
Interest cost 114 113 77
Plan participant contributions 0 0  
Plan amendments 57 0  
Business combinations  
Actuarial (gain) loss (202) 11  
Benefits paid (134) (124)  
Curtailment 0 0  
Recognition of termination benefits 0 0  
Foreign currency exchange rate change (148) 52  
Benefit obligation, ending balance 2,591 2,866 2,776
Accumulated benefit obligation 2,392 2,642  
Change in Fair Value of Plan Assets      
Fair value of plan assets, beginning balance 3,085 2,879  
Actual return on plan assets 18 199  
Company contributions 88 58  
Plan participant contributions 0 0  
Business combinations  
Benefits paid (134) (124)  
Foreign currency exchange rate change (150) 73  
Fair value of plan assets, ending balance 2,907 3,085 2,879
Funded Status 316 219  
Other Benefits      
Change in Benefit Obligation      
Benefit obligation, beginning balance 107 102  
Service cost 1 1 1
Interest cost 5 5 4
Plan participant contributions 12 14  
Plan amendments 0 0  
Business combinations 42  
Actuarial (gain) loss 5 22  
Benefits paid (27) (37)  
Curtailment 0 0  
Recognition of termination benefits 0 0  
Foreign currency exchange rate change 0 0  
Benefit obligation, ending balance 145 107 102
Change in Fair Value of Plan Assets      
Fair value of plan assets, beginning balance 0 0  
Actual return on plan assets 0 0  
Company contributions 15 23  
Plan participant contributions 12 14  
Business combinations  
Benefits paid (27) (37)  
Foreign currency exchange rate change 0 0  
Fair value of plan assets, ending balance 0 0 $ 0
Funded Status $ (145) $ (107)