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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, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Other Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost $ 0 $ 0 $ 1 $ 1
Interest cost 2 1 6 4
Expected return on plan assets
Amortization of prior service cost (credit) (7) (10) (19) (29)
Recognized net actuarial loss (gain) 0 0 0 0
Settlements    
Net periodic benefit cost (5) (9) (12) (24)
U.S. | Pension Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost 15 12 44 37
Interest cost 24 19 70 57
Expected return on plan assets (20) (16) (58) (49)
Amortization of prior service cost (credit) 0 0 0 0
Recognized net actuarial loss (gain) 3 1 8 5
Settlements     0 0
Net periodic benefit cost 22 16 64 50
Int'l. | Pension Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost 7 9 23 28
Interest cost 32 28 94 85
Expected return on plan assets (46) (41) (135) (122)
Amortization of prior service cost (credit) 1 0 2 0
Recognized net actuarial loss (gain) 12 15 35 43
Settlements     1 0
Net periodic benefit cost $ 6 $ 11 $ 20 $ 34