Warranties - Accrued Warranty Classified Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Jul. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Oct. 31, 2018
Guarantees [Abstract]
Current liabilities	$ 23.7	$ 16.1
Other long-term liabilities	11.8	6.5
Total warranty liability	$ 35.5	$ 22.6	$ 23.1	$ 30.8

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