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Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Settlements loss (gain)   $ 6 $ 37
Pension Benefits | U.S.      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost $ 49 51 58
Interest cost 76 77 62
Expected return on plan assets (66) (58) (50)
Amortization of prior service credit 0 0 0
Recognized net actuarial loss (gain) 8 12 24
Settlements loss (gain) 0 6 37
Curtailment loss (gain) 8 0 0
Net periodic benefit cost 75 88 131
Pension Benefits | Int’l.      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 38 38 47
Interest cost 114 113 77
Expected return on plan assets (163) (148) (124)
Amortization of prior service credit 0 0 (1)
Recognized net actuarial loss (gain) 58 67 11
Settlements loss (gain) (1) 0 0
Curtailment loss (gain) 0 0 0
Net periodic benefit cost 46 70 10
Other Benefits      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 1 1 1
Interest cost 5 5 4
Expected return on plan assets 0 0 0
Amortization of prior service credit (38) (38) (38)
Recognized net actuarial loss (gain) 0 (3) 0
Settlements loss (gain) 0 0 0
Curtailment loss (gain) 0 0 0
Net periodic benefit cost $ (32) $ (35) $ (33)