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Pension and Employee Benefit Plans, Valuation Assumptions (Details) - Pension Plans [Member] | 12 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
U.S. Plans [Member] |  |  |
Weighted-average assumptions used in calculating benefit obligation [Abstract] |  |  |
Discount rate - benefit obligations | 4.00% | 4.10% |
Weighted-average assumptions used in calculating plan cost [Abstract] |  |  |
Weighted average discount rate - costs | 4.10% | 4.10% | 4.30%
Foreign Plan [Member] |  |  |
Weighted-average assumptions used in calculating benefit obligation [Abstract] |  |  |
Discount rate - benefit obligations | 1.70% | 1.70% |
Weighted-average assumptions used in calculating plan cost [Abstract] |  |  |
Weighted average discount rate - costs | 1.90% | 1.70% | 1.30%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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