Management Actions - Narrative (Details) $ in Millions	3 Months Ended		12 Months Ended
	Oct. 31, 2019 USD ($)	Oct. 31, 2019 USD ($)	Oct. 31, 2019 USD ($)
Cost of sales
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges		$ 0.6
Selling, General and Administrative Expenses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges		6.0
Toro Underground Wind Down | Disposal Group, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from individually significant component disposed of or held-for-sale, excluding discontinued operations, attributable to parent, before income tax			$ 1.2
Accrued liabilities	$ 0.9	$ 0.9	0.9
Disposal group, not discontinued operation, loss (gain) on write-down			$ 8.8
Minimum | Toro Underground Wind Down | Disposal Group, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from individually significant component disposed of or held-for-sale, excluding discontinued operations, attributable to parent, before income tax	10.0
Maximum | Toro Underground Wind Down | Disposal Group, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from individually significant component disposed of or held-for-sale, excluding discontinued operations, attributable to parent, before income tax	$ 13.0