XML 29 R61.htm IDEA: XBRL DOCUMENT v3.20.1
Management Actions - Narrative (Details) - Disposal Group, Not Discontinued Operations - Toro Underground Wind Down - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
May 01, 2020
May 01, 2020
Oct. 31, 2020
Oct. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Disposal group, inventory write-down $ 0.9 $ 0.9   $ 10.0
Accrued liabilities $ 0.9 $ 0.9    
Scenario, Forecast | Minimum        
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  
Scenario, Forecast | Maximum        
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     $ 11.0