Employee Benefits - Schedule of Components of Net Periodic Defined Benefit Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Retirement Benefits [Abstract]
Service cost	$ 4.6	$ 4.3
Interest cost	1.3	1.1
Expected return on plan assets	(4.0)	(3.1)
Recognized net actuarial gain	0.6	1.3
Net periodic defined benefit plan cost	$ 2.5	$ 3.6