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Fair Value Measures - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2015
Fair Value Measures [Line Items]
Non-marketable equity securities	$ 10.9	$ 10.3
Proceeds from Sale, Maturity and Collection of Investments	7.1
Cost Method Investments
Fair Value Measures [Line Items]
Non-marketable equity securities	6.7	6.6
Equity Method Investments
Fair Value Measures [Line Items]
Non-marketable equity securities	4.2	$ 3.7
Other Income Expense Net
Fair Value Measures [Line Items]
Gain from liquidation of investment	$ 6.9

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- Definition

Fair Value Measures [Line Items]

+ References

No definition available.

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- Definition

The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.

+ References

No definition available.

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- Definition

The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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- Definition

Aggregate carrying value of owned private equity or other securities for which a quoted market price is not readily determinable, the value of which has been determined by management based upon fair value methods, including pricing of similar securities and valuation techniques and is included in the schedule of financial condition or the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Rule 15c3
-Number 240
-Section 3
-Paragraph i
-Article 15c3

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