Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 19.5	$ 19.6	$ 36.0	$ 32.8
Effective tax rate	36.20%	31.80%
Discrete income tax expense (benefit)	(1.0)
Net decrease in unrecognized tax benefits for the next 12 months, Minimum	0		0
Net decrease in unrecognized tax benefits for the next 12 months, Maximum	17.5		17.5
Canada [Member]
Operating Loss Carryforwards [Line Items]
Discrete income tax expense (benefit)			2.0
BRAZIL
Operating Loss Carryforwards [Line Items]
Discrete income tax expense (benefit)			$ (3.0)