POST RETIREMENT BENEFIT PLANS - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Retirement Benefits [Abstract]
Service cost	$ 3.0	$ 3.1
Interest cost	5.1	4.5
Expected return on plan assets	(8.2)	(7.9)
Amortization of prior service cost	(0.1)	0.0
Recognized net actuarial loss	2.0	3.8
Net periodic pension cost	$ 1.8	$ 3.5