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Goodwill and Other Intangible Assets - Schedule of Finite-Lived Assets (Details) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 63.0 | $ 63.8
Accumulated Amortization | (17.2) | (12.9)
Net Carrying Amount | 45.8 | 50.9
Customer Relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 51.4 | 52.0
Accumulated Amortization | (6.4) | (4.3)
Net Carrying Amount | 45.0 | 47.7
Other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 11.6 | 11.8
Accumulated Amortization | (10.8) | (8.6)
Net Carrying Amount | 0.8 | 3.2
Impairment charges | $ 1.4 | $ 2.6

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