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Warranties - Accrued Warranty Classified in Consolidated Balance Sheet (Detail) - USD ($) $ in Millions	Apr. 30, 2019	Oct. 31, 2018	Apr. 30, 2018	Oct. 31, 2017
Guarantees [Abstract]
Current liabilities	$ 15.2	$ 19.0
Other long-term liabilities	9.3	11.8
Total warranty liability	$ 24.5	$ 30.8	$ 36.8	$ 40.2

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- References

No definition available.

+ Details

Name:	us-gaap_GuaranteesAbstract
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- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)(1),(c)(5)
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

+ Details

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X

- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid within one year or the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability.

+ References

No definition available.

+ Details

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- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid after one year or beyond the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability.

+ References

No definition available.

+ Details

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