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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 |  |

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