v3.25.2
Employee Retirement Plans - Schedule of Net Benefit Costs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Pension benefits        
Service cost $ 24 $ 25 $ 48 $ 48
Interest cost 48 46 95 92
Expected return on plan assets (49) (48) (99) (96)
Amortization of prior service cost (credit) 1 2 2 3
Special termination benefit charge 1 3 1 3
Total pension and postretirement benefit expense (income) 25 28 47 50
Postretirement benefits        
Service cost 1 1 2
Interest cost 5 5 9 10
Amortization of actuarial net gain (9) (7) (15) (12)
Amortization of prior service cost (credit) (1) (2) (3) (4)
Total pension and postretirement benefit expense (income) $ (5) $ (3) $ (8) $ (4)