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PENSION AND POST-RETIREMENT PLANS - COMPONENTS OF NET PERIODIC BENEFIT COST (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income, net of tax: |  |  |  |
Total recognized in other comprehensive (income) loss | $ 0.9 | $ 0.7 | $ 1.7 | $ 1.5
Pension Benefits |  |  |  |
Components of net periodic benefit cost (credit): |  |  |  |
Service cost | 1.1 | 0.8 | 2.2 | 1.7
Interest cost | 2.6 | 2.5 | 5.2 | 4.9
Expected return on plan assets | (4.4) | (3.8) | (8.8) | (7.6)
Amortization of net actuarial loss (gain) |  | 0.1 |  | 0.2
Net periodic benefit credit | (0.7) | (0.4) | (1.4) | (0.8)
Post-retirement benefits |  |  |  |
Components of net periodic benefit cost (credit): |  |  |  |
Service cost | 0.1 | 0.1 | 0.1 | 0.2
Interest cost | 0.2 | 0.2 | 0.5 | 0.5
Amortization of net actuarial loss (gain) | (0.1) | (0.2) | (0.3) | (0.4)
Amortization of prior service credit | (1.0) | (0.9) | (1.9) | (1.8)
Net periodic benefit credit | $ (0.8) | $ (0.8) | $ (1.6) | $ (1.5)

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