v3.26.1
Pension Plans and Other Post Employment Benefit Plans Components of net periodic benefit cost (credit) (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 30, 2026
Jun. 30, 2026
Apr. 30, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]              
Defined Benefit Plan, Plan Assets, Contributions by Employer   $ 1,061          
Defined Contribution Plan, Approved Employer Discretionary Contribution Amount     $ 1,500        
Subsequent Event              
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]              
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 399            
Pension Plan              
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]              
Service Cost       $ 5 $ 3 $ 9 $ 7
Interest Cost       138 156 276 313
Expected return on plan assets       (147) (155) (295) (310)
Amortization of unrecognized loss (gain)       (2) 0 (2) 0
Amortization of Prior Service (Benefit) Cost       (1) (1) (2) (2)
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost       (7) 3 (14) 8
Other Benefit Plans              
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]              
Interest Cost       9 10 17 20
Amortization of unrecognized loss (gain)       (4) (4) (8) (9)
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost       $ 5 $ 6 $ 9 $ 11