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POST RETIREMENT BENEFIT PLANS - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2025 | Jul. 31, 2024 | Jul. 31, 2025 | Jul. 31, 2024
Retirement Benefits [Abstract] |  |  |  |
Service cost | $ 1.4 | $ 1.5 | $ 4.1 | $ 4.3
Interest cost | 7.7 | 8.6 | 23.2 | 25.9
Expected return on plan assets | (9.6) | (10.8) | (28.7) | (32.3)
Amortization of prior service benefit | 0.0 | 0.0 | (0.1) | (0.2)
Recognized net actuarial loss (gain) | 0.1 | (0.2) | 0.4 | (0.7)
Net periodic pension cost (benefit) | $ (0.4) | $ (0.9) | $ (1.1) | $ (3.0)

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