Stock Plans - Compensation Expense and Related Income Tax Benefit for Share-Based Awards (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 38.6	$ 36.3	$ 43.2
Related income tax benefit	4.8	5.1	8.8
Selling, general and administrative expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	32.2	28.7	37.6
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	4.0	4.7	3.6
Research and development expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 2.4	$ 2.9	$ 2.0