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Product Warranties (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Changes in accrued warranty costs [Roll Forward]        
Beginning balance $ 8.3 $ 9.1 $ 7.9 $ 9.2
Warranties recorded at time of sale 1.4 1.2 2.5 2.6
Adjustments to pre-existing warranties 0.1 (0.3) 0.1 (0.9)
Settlements (0.9) (1.7) (1.7) (2.6)
Effect of exchange rate changes 0.1 (0.2) 0.2 (0.2)
Ending balance $ 9.0 $ 8.1 $ 9.0 $ 8.1