Warranties - Accrued Warranty Classified in Consolidated Balance Sheet (Detail) - USD ($) $ in Millions	Jul. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Oct. 31, 2017
Guarantees [Abstract]
Current liabilities	$ 13.8	$ 19.0
Other long-term liabilities	9.3	11.8
Total warranty liability	$ 23.1	$ 30.8	$ 33.4	$ 40.2

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.

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

Name:	us-gaap_StandardProductWarrantyAccrual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant