Management Actions - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Aug. 02, 2019	Aug. 02, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, inventory write-down			$ 7.2
Disposal Group, Not Discontinued Operations | Toro Underground Wind Down
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		$ 1.9	$ 1.9
Disposal group, inventory write-down		$ 7.2
Scenario, Forecast | Disposal Group, Not Discontinued Operations | Toro Underground Wind Down | 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 | Disposal Group, Not Discontinued Operations | Toro Underground Wind Down | 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	$ 13.0