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Pensions (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021
Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Net periodic benefit cost | [1] | $ 0.4 | $ 0.3 | $ 1.4 | $ 0.8
Pension [Member] |  |  |  |  |
Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Service cost |  | 0.1 | 0.1 | 0.2 | 0.2
Interest cost |  | 2.0 | 1.8 | 6.0 | 5.5
Expected return on plan assets |  | (2.9) | (3.2) | (8.7) | (9.6)
Amortization of unrecognized net loss |  | 1.4 | 1.7 | 4.3 | 5.1
Net periodic benefit cost |  | $ 0.6 | $ 0.4 | $ 1.8 | $ 1.2
[1] | Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost.

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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