Income Taxes - Reconciliation of Total Unrecognized Tax Benefits (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 87.6us-gaap_UnrecognizedTaxBenefits	$ 88.4us-gaap_UnrecognizedTaxBenefits	$ 95.9us-gaap_UnrecognizedTaxBenefits
Additions for tax positions related to the current year	1.4	1.7	0.6
Reductions for tax positions related to the current year	0	(0.6)	0
Additions for tax positions related to prior years	0	0.6	0.9
Reductions for tax positions related to prior years	0	(0.1)	(7.3)
Reductions for expiration of statute of limitations	(3.2)	(1.5)	(0.1)
Settlements	(0.3)	(0.9)	(1.6)
Ending Balance	$ 85.5us-gaap_UnrecognizedTaxBenefits	$ 87.6us-gaap_UnrecognizedTaxBenefits	$ 88.4us-gaap_UnrecognizedTaxBenefits

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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-Publisher FASB

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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