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Income Taxes, Unrecognized Tax Benefits (Details) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
Reconciliation of Unrecognized Tax Benefits [Roll Forward] |  |  |  |
Beginning balance | $ 9.3 | $ 9.6 | $ 9.7 |
Gross increases - tax positions in prior period |  | 0.1 | 0.1 |
Gross decreases - tax positions in prior period |  | (0.2) | (0.6) |
Gross increases - tax positions in current period |  | 1.0 | 0.9 |
Lapse of statute of limitations |  | (1.2) | (0.5) |
Ending balance |  | 9.3 | 9.6 | $ 9.7
Unrecognized tax benefits that would impact effective tax rate |  | 1.6 |  |
Lapse of statute of limitations and settlements |  |  |  | $ 4.5
Unrecognized tax benefits accrued interest and penalties |  | $ 0.7 | $ 0.6 |
Forecast [Member] |  |  |  |
Reconciliation of Unrecognized Tax Benefits [Roll Forward] |  |  |  |
Lapse of statute of limitations and settlements | $ (0.4) |  |  |

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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations and settlements with taxing authorities. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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