v3.25.4
Pension and Other Postretirement Benefit Plans - Components of Other Comprehensive Income (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Other Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Net gain (loss) arising during the period $ 2 $ (78) $ 110
Prior service credit (cost) arising during the period 0 0 0
Total 2 (78) 110
Net loss (gain) amortization included in benefit cost (45) (51) (42)
Prior service (credit) cost amortization included in benefit cost (40) (43) (49)
Settlements and curtailments (3) 0 (1)
Total (88) (94) (92)
United States | Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Net gain (loss) arising during the period 408 35 (69)
Prior service credit (cost) arising during the period 0 0 0
Total 408 35 (69)
Net loss (gain) amortization included in benefit cost 58 43 0
Prior service (credit) cost amortization included in benefit cost 0 0 (1)
Settlements and curtailments 9 0 36
Total 67 43 35
International | Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Net gain (loss) arising during the period 686 634 (438)
Prior service credit (cost) arising during the period 5 56 (16)
Total 691 690 (454)
Net loss (gain) amortization included in benefit cost 11 5 (3)
Prior service (credit) cost amortization included in benefit cost (28) (13) 2
Settlements and curtailments (15) (1) (6)
Total $ (32) $ (9) $ (7)