Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2016 |
Oct. 31, 2015 |
Oct. 31, 2014 |
|
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
| Balance at November 1 | $ 29.6 | $ 34.3 | $ 30.5 |
| Increases in tax positions for prior years | 5.7 | 8.5 | 5.7 |
| Decreases in tax positions for prior years | (10.5) | (2.2) | (8.2) |
| Increases in tax positions for current years | 6.9 | 6.2 | 10.3 |
| Settlements with taxing authorities | 0.0 | (5.7) | (0.6) |
| Lapse in statute of limitations | (2.6) | (6.2) | (0.8) |
| Currency translation | (0.6) | 5.3 | 2.6 |
| Balance at October 31 | $ 29.7 | $ 29.6 | $ 34.3 |