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Leases (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2022
Lease Assets and Liabilities [Abstract] |  |  |  |  |  |
Operating lease ROU assets |  | $ 49.2 |  | $ 49.2 |  | $ 52.1
Operating lease ROU assets, Statement of Financial Position [Extensible List] |  | Other noncurrent assets |  | Other noncurrent assets |  | Other noncurrent assets
Finance lease ROU assets | [1] | $ 7.2 |  | $ 7.2 |  | $ 7.7
Finance lease ROU assets, Statement of Financial Position [Extensible List] |  | Property, plant and equipment - net |  | Property, plant and equipment - net |  | Property, plant and equipment - net
Operating lease liabilities, current |  | $ 10.2 |  | $ 10.2 |  | $ 12.7
Operating lease liabilities, current, Statement of Financial Position [Extensible List] |  | Other current liabilities |  | Other current liabilities |  | Other current liabilities
Operating lease liabilities, noncurrent |  | $ 40.4 |  | $ 40.4 |  | $ 41.2
Operating lease liabilities, noncurrent, Statement of Financial Position [Extensible List] |  | Other noncurrent liabilities |  | Other noncurrent liabilities |  | Other noncurrent liabilities
Finance lease liabilities, current |  | $ 0.4 |  | $ 0.4 |  | $ 0.4
Finance lease liabilities, current, Statement of Financial Position [Extensible List] |  | Long-term debt - current portion |  | Long-term debt - current portion |  | Long-term debt - current portion
Finance lease liabilities, noncurrent |  | $ 2.4 |  | $ 2.4 |  | $ 2.8
Finance lease liabilities, noncurrent, Statement of Financial Position [Extensible List] |  | Long-term debt |  | Long-term debt |  | Long-term debt
Accumulated amortization |  | $ 3.0 |  | $ 3.0 |  | $ 2.8
Components of Lease Expense [Abstract] |  |  |  |  |  |
Operating lease expense | [2] | 5.2 | $ 5.2 | 16.0 | $ 14.6 |
Finance lease expense [Abstract] |  |  |  |  |  |
Depreciation of ROU assets |  | 0.1 | 0.1 | 0.4 | 0.4 |
Interest on lease liabilities |  | 0.0 | 0.0 | 0.1 | 0.1 |
Total lease expense |  | 5.3 | 5.3 | 16.5 | 15.1 |
Short-term lease expense |  | $ 1.4 | $ 1.0 | $ 4.2 | $ 2.8 |
[1] | Finance lease right-of-use (“ROU”) assets were recorded net of accumulated amortization of $3.0 million and $2.8 million as of December 31, 2022 and March 31, 2022, respectively.
[2] | For the three and nine months ended December 31, 2022, operating lease expense included short-term lease expense of $1.4 million and $4.2 million, respectively. For the three and nine months ended December 31, 2021, operating lease expense included short-term lease expense of $1.0 million and $2.8 million, respectively. Variable lease expense was not significant.

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