|
Inventories - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
6 Months Ended | ||
|---|---|---|---|
|
Apr. 30, 2013
|
Apr. 30, 2012
|
Oct. 31, 2012
|
|
| Inventory Disclosure [Abstract] | |||
| LIFO inventory valuation, year-end projection | $ 0 | $ 0 | |
| Excess of replacement cost over LIFO value | $ 10.7 | $ 10.7 | |