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Pension Plans - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected periodic pension cost in current fiscal year |  |  | $ 3.2 |
Benefits paid | $ 0.2 | $ 0.2 | 0.4 | $ 0.3
Defined benefit plan expected contributions in current fiscal year | $ 1.1 |  | $ 1.1 |
FRANCE | Minimum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Termination benefits, salary period (in months) |  |  | 1 month |
FRANCE | Maximum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Termination benefits, salary period (in months) |  |  | 5 months |

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- Definition The total amount of expected net periodic benefit cost for defined benefit plans for the next fiscal year. Period benefit costs include the following components: service cost, interest cost, prior service cost or credit, actuarial gain (loss), gain (loss) due to settlements or curtailments. + References No definition available. + Details
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- Definition Termination Benefits, Salary Period + References No definition available. + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of contributions received and expected to be received by defined benefit plan from employer in current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2709-114920 + Details
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