Share-Based Compensation Plans - Performance Share Narrative (Details) - Performance shares - USD ($) $ / shares in Units, $ 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] | |||
| Total unrecognized compensation cost | $ 12.5 | ||
| Weighted-average vesting period | 1 year 11 months | ||
| Service period | 3 years | ||
| Fair value per share of awards granted (usd per share) | $ 28.99 | $ 29.82 | $ 27.68 |
| Total fair value of RSUs vested | $ 6.6 | $ 5.0 | $ 5.0 |
| Vesting period | 3 years | ||
| Minimum | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Percentage of awards originally granted | 0.00% | ||
| Maximum | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Percentage of awards originally granted | 150.00% | ||