Employee Benefits - Components of Net Periodic Pension Costs and Other Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Components of net periodic benefit cost and other amounts recognized in the Consolidated Statements of Income:
Service cost	$ 17.2	$ 13.9	$ 10.1
Interest cost	4.4	5.2	6.1
Expected return on plan assets	(12.5)	(10.8)	(9.8)
Recognized actuarial loss	5.4	4.0	0.8
Net periodic pension cost	$ 14.5	$ 12.3	$ 7.2