v3.26.1
Pension and Other Postretirement Benefits (Tables)
3 Months Ended
Mar. 31, 2026
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Costs
The following summarizes the components of net periodic benefit costs:
Three Months Ended 
March 31,
(Millions of dollars)20262025
Pension Benefits
Service cost$62 $55 
Interest cost39 37 
Expected return on plan assets(39)(37)
Amortization of prior service credit(2)(2)
Amortization of actuarial loss
Net periodic pension benefit cost$64 $57 
Other Benefits
Service cost$$
Interest cost
Amortization of prior service credit(5)(6)
Net periodic other benefit cost$$