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Pension and Employee Benefit Plans, Defined Benefit Employee Benefit Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Employer Contributions [Abstract] |  |  |  |
Net periodic benefit cost (income) | [1] | $ 3.3 | $ 3.0 | $ 2.9
Pension Plans [Member] |  |  |  |
Employer Contributions [Abstract] |  |  |  |
Held for sale pension liabilities |  | 17.8 | 0.0 |
Employer contributions |  | 21.5 | 5.8 |
Net periodic benefit cost (income) |  | 3.9 | 3.7 | 3.6
Pension Plans [Member] | U.S. Plans [Member] |  |  |  |
Employer Contributions [Abstract] |  |  |  |
Employer contributions |  | 19.3 | 3.5 | 8.0
Pension Plans [Member] | Non-U.S Plans [Member] |  |  |  |
Employer Contributions [Abstract] |  |  |  |
Employer contributions |  | 2.2 | 2.3 | 5.9
Postretirement Plans [Member] |  |  |  |
Employer Contributions [Abstract] |  |  |  |
Net periodic benefit cost (income) |  | $ (0.3) | $ (0.3) | $ (0.3)
[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 contribution received by defined benefit plan from employer which increases plan assets. + 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 http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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