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Employee Benefits (Tables)
 9 Months Ended
Sep. 30, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Schedule of Net Periodic Costs
The components of net periodic cost for the Domestic Pension Plan, the significant foreign pension plans and the domestic postretirement benefit plan are listed below.
 Domestic Pension PlanForeign Pension PlansDomestic Postretirement Benefit Plan
Three Months Ended September 30,202420232024202320242023
Service cost$0.0 $0.0 $0.8 $0.8 $0.0 $0.0 
Interest cost1.0 1.0 3.8 3.9 0.2 0.2 
Expected return on plan assets(0.7)(1.0)(3.8)(4.3)0.0 0.0 
Settlements0.0 0.0 (0.1)0.0 0.0 0.0 
Amortization of:
Prior service cost0.0 0.1 0.1 0.0 0.0 0.0 
Unrecognized actuarial losses0.3 0.4 1.5 1.3 0.0 0.0 
Net periodic cost$0.6 $0.5 $2.3 $1.7 $0.2 $0.2 
Domestic Pension PlanForeign Pension PlansDomestic Postretirement Benefit Plan
Nine Months Ended September 30,202420232024202320242023
Service cost$0.0 $0.0 $2.5 $1.4 $0.0 $0.0 
Interest cost2.8 3.0 11.1 11.8 0.6 0.7 
Expected return on plan assets(2.1)(3.0)(11.1)(12.8)0.0 0.0 
Settlements0.0 0.0 (0.2)0.0 0.0 0.0 
Amortization of:
Prior service cost0.0 0.1 0.1 0.1 0.0 0.0 
Unrecognized actuarial losses1.1 1.2 4.4 3.8 0.0 0.0 
Net periodic cost$1.8 $1.3 $6.8 $4.3 $0.6 $0.7