Long-Term Debt - Summary of Long-Term Debt (Detail) (USD $) In Millions, unless otherwise specified	Apr. 30, 2013	Oct. 31, 2012
Debt Instrument [Line Items]
Carrying amount of long-term debt	$ 1,279.4	$ 1,200.3
Less current portion	(10.0)	(25.0)
Long-term debt	1,269.4	1,175.3
Amended Credit Agreement [Member]
Debt Instrument [Line Items]
Carrying amount of long-term debt	298.3
Less current portion	(10.0)
Long-term debt	288.3
2010 Credit Agreement [Member]
Debt Instrument [Line Items]
Carrying amount of long-term debt		255.0
Senior Notes due 2017 [Member]
Debt Instrument [Line Items]
Carrying amount of long-term debt	302.0	302.3
Senior Notes due 2019 [Member]
Debt Instrument [Line Items]
Carrying amount of long-term debt	244.0	243.6
Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Carrying amount of long-term debt	257.6	256.0
Trade Accounts Receivable Credit Facility [Member]
Debt Instrument [Line Items]
Carrying amount of long-term debt	130.0	110.0
Other long-term debt [Member]
Debt Instrument [Line Items]
Carrying amount of long-term debt	$ 47.5	$ 33.4