v3.26.3
Pension and Postretirement Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2026
Retirement Benefits [Abstract]  
Schedule of Net Pension and Postretirement Cost Net periodic pension and postretirement benefit cost for the Company’s defined pension and postretirement benefit plans for the three and nine months ended September 30, 2026 and 2025 are set forth below (in millions):
Three Months Ended September 30,Nine Months Ended September 30,
Pension benefits2026202520262025
Service cost$1.5 $2.0 $4.5 $5.7 
Interest cost6.6 7.0 19.8 20.3 
Expected return on plan assets(7.5)(6.7)(22.4)(19.5)
Amortization of net actuarial losses2.3 2.3 6.8 6.7 
Amortization of prior service cost0.5 0.4 1.3 1.2 
Net periodic pension cost$3.4 $5.0 $10.0 $14.4 

Three Months Ended September 30,Nine Months Ended September 30,
Postretirement benefits2026202520262025
Service cost$— $— $0.1 $— 
Interest cost0.4 0.4 1.3 1.1 
Amortization of net actuarial losses— — — (0.1)
Amortization of prior service cost— 0.1 0.2 0.3 
Net periodic postretirement benefit cost$0.4 $0.5 $1.6 $1.3