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Employee Benefit Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Other Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost $ 0 $ 0 $ 1 $ 0
Interest cost 1 1 4 4
Expected return on plan assets
Amortization of prior service credit (10) (9) (29) (28)
Recognized net actuarial loss (gain) 0 (1) 0 (3)
Settlements
Net periodic benefit cost (9) (9) (24) (27)
U.S. | Pension Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost 12 12 37 38
Interest cost 19 19 57 58
Expected return on plan assets (16) (15) (49) (44)
Amortization of prior service credit 0 0 0 0
Recognized net actuarial loss (gain) 1 3 5 9
Settlements 0 2 0 6
Net periodic benefit cost 16 21 50 67
Int'l. | Pension Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost 9 10 28 29
Interest cost 28 28 85 85
Expected return on plan assets (41) (38) (122) (112)
Amortization of prior service credit 0 0 0 0
Recognized net actuarial loss (gain) 15 16 43 50
Settlements 0 0 0 0
Net periodic benefit cost $ 11 $ 16 $ 34 $ 52