v3.25.2
Employee Benefits (Tables)
 6 Months Ended
Jun. 30, 2025
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
Components of net periodic benefit cost for both the Retirement Plans and PBOP were as follows (in millions):
Retirement PlansPBOP
For the
Three Months Ended
June 30,		For the
Three Months Ended
June 30,
2025202420252024
Service cost$0.4 $0.5 $— $— 
Interest cost0.9 1.0 0.3 0.3 
Expected return on plan assets(1.0)(1.0)(0.7)(0.7)
Amortization of unrecognized net loss0.1 0.2 — — 
Settlement charge0.2 0.3 — — 
Regulatory asset decrease0.1 — — — 
Net periodic benefit cost (credit)
$0.7 $1.0 $(0.4)$(0.4)

Retirement PlansPBOP
For the
Six Months Ended
June 30,		For the
Six Months Ended
June 30,
2025202420252024
Service cost$0.9 $1.0 $— $— 
Interest cost1.9 2.0 0.6 0.6 
Expected return on plan assets(2.1)(2.0)(1.4)(1.3)
Amortization of unrecognized net loss0.1 0.4 — — 
Settlement charge0.5 0.4 — — 
Regulatory asset decrease0.1 — — — 
Net periodic benefit cost (credit)
$1.4 $1.8 $(0.8)$(0.7)