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Retirement Plans and Postretirement Benefits
 3 Months Ended
Jun. 30, 2022
Postemployment Benefits [Abstract]  
Pension and Other Postretirement Employee Benefit Plans Retirement Plans and Postretirement Benefits
The following table details the components of net periodic cost of our company-sponsored pension and other postretirement employee benefit plans for the periods presented:
 Quarter Ended June 30,Six Months Ended June 30,
Pension Benefit Plans2022202120222021
Service cost$0.5 $0.5 $1.1 $0.9 
Interest cost2.2 2.1 4.4 4.2 
Expected return on plan assets(2.8)(2.6)(5.7)(5.3)
Amortization of actuarial loss1.5 2.6 3.1 5.1 
Net periodic cost $1.5 $2.5 $2.9 $5.0 
 Quarter Ended June 30,Six Months Ended June 30,
Other Postretirement Employee Benefit Plans2022202120222021
Service cost$0.1 $— $0.2 $0.1 
Interest cost0.5 0.5 1.0 0.9 
Net periodic cost$0.6 $0.5 $1.2 $1.0 
We record the service component of net periodic cost as part of "Cost of sales" and "Selling, general, and administrative expenses", while the non-service components of net periodic cost are recorded to "Other non-operating expense" on our Consolidated Statements of Operations. For the quarter and six months ended June 30, 2022, we recorded $0.5 million and $1.1 million to "Cost of sales" and $0.1 million and $0.2 million to "Selling, general, and administrative expenses". For the quarter and six months ended June 30, 2021, we recorded $0.4 million and $0.9 million to "Cost of sales" and less than $0.1 million and $0.1 million to "Selling, general, and administrative expenses".