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Number of divestitures.

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The amount of assets reported by an equity method investment of the entity.

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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.

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Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

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

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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.

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The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or sale of an entity that is related to it but not strictly controlled.

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Acquisitions and Divestitures - Additional Information (Detail) $ in Millions	3 Months Ended					6 Months Ended	12 Months Ended
	Oct. 31, 2017 USD ($)	Apr. 30, 2017 deconsolidation	Jan. 31, 2017 deconsolidation	Oct. 31, 2016 USD ($)	Apr. 30, 2016 USD ($) Divestiture	Apr. 30, 2016 USD ($) Divestiture	Oct. 31, 2017 USD ($) liquidation deconsolidation Divestiture Acquisition	Oct. 31, 2016 USD ($) deconsolidation Divestiture Acquisition	Oct. 31, 2015 USD ($) Divestiture Acquisition	May 23, 2005 USD ($)	Mar. 28, 2005 USD ($)
Business Acquisition [Line Items]
Number of divestitures (business) \| Divestiture					2	4	2	4	8
Number of acquisitions (acquisition) \| Acquisition							0	0	0
Number of deconsolidations \| deconsolidation							2	1
Number of subsidiaries liquidated \| liquidation							2
Gain (loss) on disposal of businesses, net							$ (1.7)	$ (14.5)	$ (9.2)
Proceeds from divestiture and deconsolidation							5.1	24.1
Notes receivables related to sale of business									2.9	$ 51.0	$ 90.0
Gain (Loss) on sale of business	$ 3.9			$ (18.6)
Proceeds from divestitures							$ 5.9	23.8	$ 19.6
Minimum
Business Acquisition [Line Items]
Notes receivable term									3 months
Maximum
Business Acquisition [Line Items]
Notes receivable term							14 months		5 years
Notes Receivable
Business Acquisition [Line Items]
Notes receivables related to sale of business	$ 4.3						$ 4.3
2015 Divestiture
Business Acquisition [Line Items]
Proceeds from divestiture and deconsolidation							$ 0.8
2016 Divestiture
Business Acquisition [Line Items]
Notes receivables related to sale of business					$ 2.4	$ 2.4
Gain (Loss) on sale of business								(3.6)
Deconsolidation of Earthminded Benelux, NV
Business Acquisition [Line Items]
Notes receivables related to sale of business				0.3				0.3
Gain (Loss) on sale of business								$ 18.1
Ownership percent sold of Earthminded Benelux, NV								51.00%
Fair value of retained noncontrolling interest				0.3				$ 0.3
Carrying value of former subsidiary net assets				$ 18.7				$ 18.7
Rigid Industrial Packaging & Services
Business Acquisition [Line Items]
Number of divestitures (business) \| Divestiture							2	3	6
Number of deconsolidations \| deconsolidation		1
Number of subsidiaries liquidated \| liquidation							2
Flexible Products & Services
Business Acquisition [Line Items]
Number of divestitures (business) \| Divestiture								1	2
Number of deconsolidations \| deconsolidation			1