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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, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Other Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost $ 0 $ 0 $ 1 $ 1
Interest cost 1 1 3 3
Expected return on plan assets
Amortization of prior service credit (9) (9) (29) (28)
Recognized net actuarial loss 0 0 0 1
Settlements
Curtailments     0 0
Special Termination Benefits     0 0
Net periodic benefit cost (8) (8) (25) (23)
United States | Pension Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost 13 17 45 56
Interest cost 18 12 42 40
Expected return on plan assets (10) (22) (36) (66)
Amortization of prior service credit 0 0 0 0
Recognized net actuarial loss 6 9 17 36
Settlements 9 28 31 72
Curtailments     0 12
Special Termination Benefits     0 9
Net periodic benefit cost 36 44 99 159
Int'l. | Pension Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost 13 15 39 46
Interest cost 19 19 61 59
Expected return on plan assets (31) (30) (99) (90)
Amortization of prior service credit (1) 0 (1) 0
Recognized net actuarial loss 2 8 6 24
Settlements 0 0 0 0
Curtailments     0 0
Special Termination Benefits     0 0
Net periodic benefit cost $ 2 $ 12 $ 6 $ 39