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Employee Benefit Plans (Defined Benefit Plans Narrative) (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Mar. 31, 2018
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Defined Benefit Plan Disclosure [Line Items] |  |
Accumulated benefit obligation | $ 118.7 | $ 108.9
Company's expected contribution to defined benefit pension plans in next fiscal year | $ 5.5 |
Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 33.00% |
Debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 34.00% |
Swiss real estate funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 28.00% |
Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 2.00% |

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one 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 http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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