Income Taxes - Reconciliation of Total Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Oct. 31, 2015 |
Oct. 31, 2014 |
Oct. 31, 2013 |
|
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
Beginning balance | $ 85.5 | $ 87.6 | $ 88.4 |
Additions for tax positions related to the current year | 2.1 | 1.4 | 1.7 |
Reductions for tax positions related to the current year | 0.0 | 0.0 | (0.6) |
Additions for tax positions related to prior years | 0.1 | 0.0 | 0.6 |
Reductions for tax positions related to prior years | 0.0 | 0.0 | (0.1) |
Reductions for expiration of statute of limitations | (5.2) | (3.2) | (1.5) |
Settlements | 0.0 | (0.3) | (0.9) |
Ending Balance | $ 82.5 | $ 85.5 | $ 87.6 |