Share-Based Compensation Plans - Schedule of Compensation Expense and Related Income Tax Benefit for Share-Based Awards (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Jul. 31, 2019 |
Jul. 31, 2018 |
Jul. 31, 2019 |
Jul. 31, 2018 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Total share-based compensation expense | $ 8.3 | $ 8.1 | $ 28.4 | $ 34.5 |
Related income tax benefit | 1.1 | 1.5 | 4.0 | 7.1 |
Selling, general and administrative expense | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Total share-based compensation expense | 6.8 | 6.7 | 22.1 | 30.3 |
Cost of sales | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Total share-based compensation expense | 1.0 | 0.9 | 3.9 | 2.6 |
Research and development expense | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Total share-based compensation expense | $ 0.5 | $ 0.5 | $ 2.4 | $ 1.6 |