v3.26.1
Employee Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2026
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Schedule of Net Benefit (Credits) Costs [Table Text Block] The components of net periodic benefit cost (credit) are as follows:
Pension Benefits
Three Months EndedSix Months Ended
June 30,June 30,
2026202520262025
(in millions)
Service cost$1.0 $— $1.6 $0.1 
Interest cost22.7 6.0 39.8 12.0 
Expected asset return(19.9)(6.4)(35.1)(12.8)
Amortized loss2.6 2.2 5.1 4.3 
Net periodic benefit cost$6.4 $1.8 $11.4 $3.6 
Other Postretirement Benefits
Three Months EndedSix Months Ended
June 30,June 30,
2026202520262025
(in millions)
Service cost$0.2 $— $0.4 $— 
Interest cost2.8 2.2 5.3 4.5 
Amortized gain(2.1)(2.4)(4.1)(4.7)
Amortized prior service credit(0.1)(0.1)(0.3)(0.3)
Net periodic benefit cost (credit)$0.8 $(0.3)$1.3 $(0.5)