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RETIREMENT PLANS
 6 Months Ended
Jun. 30, 2024
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]  
RETIREMENT PLANS RETIREMENT PLANS
The following table presents the Company’s net periodic benefit cost (income) components:
 Three Months EndedSix Months Ended
 June 30, 2024June 30, 2023June 30, 2024June 30, 2023
Service Cost0.5 0.6 1.0 0.9 
Interest Cost5.4 5.7 10.8 11.3 
Expected Return on Plan Assets(5.0)(6.7)(10.0)(13.4)
Amortization of Prior Service Cost and Net Actuarial Loss (Gain)0.1 (0.6)0.3 (1.1)
Special Termination Benefits— — 0.2 — 
Net Periodic Benefit Expense (Income)$1.0 $(1.0)$2.3 $(2.3)

The service cost component is included in Cost of Sales and Operating Expenses. All other components of net periodic benefit costs are included in Other Expense (Income), Net on the Company's Condensed Consolidated Statements of Income.
For the three months ended June 30, 2024 and June 30, 2023, the Company contributed $1.8 million and $2.0 million, respectively, to post retirement plans. For the six months ended June 30, 2024 and June 30, 2023, the Company contributed $3.6 million and $3.5 million, respectively. The Company expects to make total contributions of $17.8 million in 2024. The Company contributed a total of $8.3 million in 2023.
For the three months ended June 30, 2024 and June 30, 2023, the Company contributed $10.8 million and $11.3 million, respectively, to defined contribution plans. For the six months ended June 30, 2024 and June 30, 2023, the Company contributed $22.4 million and $17.5 million, respectively.