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Inventories (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Mar. 31, 2026
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Inventory Disclosure [Abstract] |  |
Finished goods | $ 433.7 | $ 453.0
Work-in-process | 51.0 | 53.5
Raw materials and supplies | 144.0 | 145.1
Provision for obsolete finished goods and raw materials | (16.6) | (15.9)
Total | $ 612.1 | $ 635.7

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