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v3.23.3

PENSION AND POST-RETIREMENT PLANS - COMPONENTS OF NET PERIODIC BENEFIT COST (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Pension Benefits |  |  |  |
Components of Net Periodic Benefit Cost (Credit): |  |  |  |
Service cost | $ 0.3 | $ 1.2 | $ 2.3 | $ 3.6
Interest cost | 2.5 | 1.9 | 7.5 | 5.2
Expected return on plan assets | (3.0) | (4.0) | (10.4) | (11.9)
Amortization of net loss (gain) | 0.2 | 0.1 | 0.9 | 1.8
Amortization of prior service credit |  | (0.3) |  | (0.8)
Net periodic benefit cost (credit) | 0.0 | (1.1) | 0.3 | (2.1)
Post-retirement benefits |  |  |  |
Components of Net Periodic Benefit Cost (Credit): |  |  |  |
Service cost | 0.1 | 0.2 | 0.2 | 0.5
Interest cost | 0.3 | 0.3 | 0.7 | 0.7
Amortization of net loss (gain) | (0.5) | 0.2 | (1.5) | 0.6
Amortization of prior service credit | (1.0) | (1.0) | (2.8) | (2.8)
Net periodic benefit cost (credit) | $ (1.1) | $ (0.3) | $ (3.4) | $ (1.0)

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