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Inventories - Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Mar. 31, 2020
--- | --- | ---
Inventory [Line Items] |  |
Work-in-process, increase adjustment | $ 17.9 | $ 25.2
Raw materials and supplies, decrease adjustment | $ (60.4) | (69.9)
Revision of Prior Period, Error Correction, Adjustment |  |
Inventory [Line Items] |  |
Work-in-process, increase adjustment |  | 17.1
Raw materials and supplies, decrease adjustment |  | $ 17.1

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