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Product Warranties, Operating Leases, and Other Commitments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
Changes in accrued warranty costs [Roll Forward] |  |  |  |
Beginning balance | $ 10.0 |  | $ 8.3 |
Warranties recorded at time of sale | 6.7 |  | 5.2 |
Adjustments to pre-existing warranties | (0.8) |  | 0.3 |
Additions and adjustments due to acquisition | (1.0) | [1] | 4.1 |
Settlements | (6.2) |  | (7.6) |
Effect of exchange rate changes | 0.6 |  | (0.3) |
Ending balance | 9.3 |  | 10.0 | $ 8.3
Rental expense | 18.5 |  | $ 12.8 | $ 11.9
Future minimum rental commitments under non-cancelable operating leases [Abstract] |  |  |  |
2019 | 14.4 |  |  |
2020 | 12.0 |  |  |
2021 | 10.4 |  |  |
2022 | 7.1 |  |  |
2023 | 6.6 |  |  |
2024 and beyond | 24.6 |  |  |
Total future minimum rental commitments | 75.1 |  |  |
Other Commitments [Line Items] |  |  |  |
Capital expenditure commitments | $ 24.1 |  |  |
Minimum [Member] |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Product warranty period | 1 year |  |  |
Other Commitments [Line Items] |  |  |  |
Indemnification period | 1 year |  |  |
Maximum [Member] |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Product warranty period | 5 years |  |  |
Other Commitments [Line Items] |  |  |  |
Indemnification period | 15 years |  |  |
[1] | During fiscal 2018, the Company decreased its liability for product warranties by $1.0 million as a result of measurement period adjustments made in connection with purchase accounting for the acquisition of Luvata HTS. See Note 2 for additional information.

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