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Pension and Other Benefits
 9 Months Ended
Sep. 30, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Pension and Other Benefits Pension and Other Benefits
 
The following table sets forth the components of net pension and other benefit costs for the three and nine months ended September 30, 2023 and 2022 (in millions):
 Pension BenefitsOther Benefits
 2023202220232022
Three Months Ended September 30,    
Service cost$0.2 $0.2 $— $— 
Interest cost8.8 5.4 0.2 0.2 
Expected return on plan assets(7.0)(5.1)— — 
Amortization of prior service cost0.1 0.1 — — 
Amortization of actuarial losses (gains)2.7 2.8 (0.2)— 
Settlement losses— 1.7 — — 
NET PERIODIC BENEFIT COST$4.8 $5.1 $— $0.2 
Nine Months Ended September 30,
Service cost$0.4 $0.6 $— $— 
Interest cost26.3 18.0 0.6 0.4 
Expected return on plan assets(21.0)(21.5)— — 
Amortization of prior service cost0.3 0.3 — — 
Amortization of actuarial losses (gains)7.9 8.0 (0.4)(0.2)
Settlement losses— 7.5 — — 
NET PERIODIC BENEFIT COST$13.9 $12.9 $0.2 $0.2 

During the three months ended September 30, 2022, the Company recognized $1.5 million of settlement losses in continuing operations and $0.2 million of settlement losses in discontinued operations. During the nine months ended September 30, 2022, the Company recognized $5.9 million of settlement losses in continuing operations and $1.6 million of settlement losses in discontinued operations. Those settlement losses are the result of lump-sum distributions from the Company's defined benefit pension plans which exceeded the threshold for settlement accounting under U.S. GAAP for the year.

Employer Contributions
 
The Company made $10.0 million in contributions to its qualified domestic defined benefit pension plan and no contributions to its foreign pension plans during the nine months ended September 30, 2023. The Company made $10.0 million in contributions to its qualified domestic defined benefits pension plan and $2.5 million in contributions to its foreign pension plans during the nine months ended September 30, 2022. Although not required by ERISA and the Internal Revenue Code, the Company may elect to make additional voluntary contributions to its qualified domestic defined benefit pension plan in the fourth quarter of 2023.