Acquisitions and Divestitures - Additional Information (Detail) $ in Millions	3 Months Ended
Jan. 31, 2018 USD ($) Divestiture business	Jan. 31, 2017 USD ($) Divestiture business
Business Acquisition [Line Items]
Number of divestitures (business) \| Divestiture	0	0
Number of acquisitions (business) \| business	0	0
Deconsolidation, number of businesses, nonstrategic \| business		1
Loss on disposal of businesses, net	$ 0.0	$ 0.5
Proceeds from divestitures	1.4	$ 0.8
Notes Receivable
Business Acquisition [Line Items]
Consideration for divestiture	2.9
2015 Divestiture
Business Acquisition [Line Items]
Proceeds from divestitures	0.9
2017 Divestiture
Business Acquisition [Line Items]
Proceeds from divestitures	$ 0.5

Deconsolidation, Number of Businesses, Nonstrategic

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- Definition

Number of divestitures.

+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

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- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228

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- Definition

The number of businesses acquired by the entity during the period.

+ References

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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

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