Share-Based Compensation Plans - Summary of Total Compensation Expense and Related Income Tax Benefit (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2016 |
Oct. 31, 2015 |
Oct. 31, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Share-based compensation expense before income taxes | $ 14.0 | $ 14.2 | $ 15.8 |
| Income tax benefit | (6.0) | (5.9) | (6.7) |
| Allocated Share-based Compensation Expense, Net of Tax | 8.0 | 8.3 | 9.1 |
| RSUs | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Share-based compensation expense before income taxes | 7.1 | 6.9 | 7.3 |
| Performance shares | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Share-based compensation expense before income taxes | 6.7 | 6.5 | 6.4 |
| Stock options | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Share-based compensation expense before income taxes | $ 0.3 | $ 0.8 | $ 2.1 |