v3.26.1
Benefit Plans and Other Postretirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost
Components of Net Periodic Benefit Cost
Three Months Ended June 30
20262025
(Millions of Dollars)Pension Benefits
Service cost$1 $1 
Interest cost (a)
2 1 
Expected return on plan assets (a)
(2)(2)
Net periodic benefit cost1 — 
Effects of regulation— 1 
Net benefit cost recognized for financial reporting$1 $1 
Six Months Ended June 30
20262025
(Millions of Dollars)Pension Benefits
Service cost$2 $2 
Interest cost (a)
3 2 
Expected return on plan assets (a)
(4)(4)
Amortization of net loss (a)
1 — 
Net periodic benefit cost2 — 
Effects of regulation1 1 
Net benefit cost recognized for financial reporting$3 $1 
(a)The components of net periodic cost other than the service cost component are included in the line item "Other income, net" in the consolidated statements of income or capitalized on the consolidated balance sheets as a regulatory asset.