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Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Settlements loss (gain) $ 37 $ 102 $ 43
Pension Benefits | United States      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 58 73 85
Interest cost 62 53 66
Expected return on plan assets (50) (80) (85)
Amortization of prior service credit 0 0 0
Recognized net actuarial loss (gain) 24 43 51
Settlements loss (gain) 37 102 44
Curtailment loss 0 12 0
Net periodic benefit cost 131 203 161
Pension Benefits | Int’l.      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 47 61 54
Interest cost 77 79 85
Expected return on plan assets (124) (120) (145)
Amortization of prior service credit (1) (1) (1)
Recognized net actuarial loss (gain) 11 33 22
Settlements loss (gain) 0 0 (1)
Curtailment loss 0 0 0
Net periodic benefit cost 10 52 14
Other Benefits      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 1 2 2
Interest cost 4 4 6
Expected return on plan assets 0 0 0
Amortization of prior service credit (38) (37) (31)
Recognized net actuarial loss (gain) 0 0 1
Settlements loss (gain) 0 0 0
Curtailment loss 0 0 0
Net periodic benefit cost $ (33) $ (31) $ (22)