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Pension and Postretirement Health and Life Benefits
 3 Months Ended
Mar. 31, 2024
Retirement Benefits, Description [Abstract]  
Pension and Postretirement Health and Life Benefits PENSION AND POSTRETIREMENT HEALTH AND LIFE BENEFITS
The Company provides retirement benefits to certain employees and retirees under two qualified defined benefit pension plans, one postretirement health and life benefit plan and two disqualified plans.

The components of net periodic benefit costs (credits) for the defined benefit pension plans were as follows (in millions):
Three Months Ended 
 March 31,
20242023
Service costs$0.5 $0.7 
Interest costs3.8 7.0 
Amortization of prior service costs (credits), net(0.1)(0.1)
Expected return on plan assets (gains)(4.6)(7.7)
Net periodic benefit costs (credits)
$(0.4)$(0.1)


The components of net periodic benefit costs for the postretirement health and life benefit plan were as follows (in millions):
Three Months Ended 
 March 31,
20242023
Interest costs$1.1 $1.2 
Net periodic benefit costs$1.1 $1.2 

The Company reports service costs for its defined benefit pension plans and its postretirement health and life benefit plans in Cost of Sales and Selling, General and Administrative Expenses. The remaining components of net periodic benefit (credits) costs are reported as Nonoperating Components of Net Periodic Benefit Loss (Income).