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Asbestos - Asbestos Adjustments (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Change in estimates:      
Change in actuarial estimate - asbestos liability $ 56.0 $ 145.6 $ 33.0
Change in actuarial estimate - insurance receivable (0.1) (5.3) (2.0)
Change in estimate - AICF claims-handling costs 1.2 0.6 1.5
Subtotal - Change in estimates 57.1 140.9 32.5
Effect of foreign exchange on Asbestos net liabilities (45.9) (13.2) 123.0
Loss (gain) on foreign currency forward contracts 24.5 5.3 (11.7)
Other 1.3 (1.3) 0.1
Asbestos adjustments loss $ 37.0 $ 131.7 $ 143.9