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POST RETIREMENT BENEFIT PLANS - Components of Net Periodic Pension Cost (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Retirement Benefits [Abstract]        
Service cost $ 1.6 $ 1.7 $ 3.3 $ 3.4
Interest cost 7.8 8.7 15.5 17.3
Expected return on plan assets (9.5) (10.7) (19.1) (21.5)
Amortization of prior service benefit (0.1) (0.1) (0.1) (0.2)
Recognized net actuarial loss (gain) 0.2 (0.3) 0.3 (0.5)
Net periodic pension benefit $ 0.0 $ (0.7) $ (0.1) $ (1.5)