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Derivative Financial Instruments - Schedule of Fair Value of Derivative Contracts Recorded on Gross Basis in Consolidated Balance Sheets (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Mar. 31, 2018
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Derivatives, Fair Value [Line Items] |  |
Notional Amounts | $ 487.4 | $ 161.7
Forward foreign currency exchange contracts | 8.6 | 0.0
Forward foreign currency exchange contracts - liabilities | 0.1 | 7.7
Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amounts | 466.1 | 161.7
Forward foreign currency exchange contracts | 8.3 | 0.0
Forward foreign currency exchange contracts - liabilities | 0.1 | 7.7
Designated as Hedging Instrument | Forward foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amounts | 132.1 | 161.7
Forward foreign currency exchange contracts | 3.5 | 0.0
Forward foreign currency exchange contracts - liabilities | 0.1 | 7.7
Designated as Hedging Instrument | Net investment hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amounts | 334.0 | 0.0
Forward foreign currency exchange contracts | 4.8 | 0.0
Forward foreign currency exchange contracts - liabilities | 0.0 | 0.0
Not Designated as Hedging Instrument | Forward foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amounts | 21.3 | 0.0
Forward foreign currency exchange contracts | 0.3 | 0.0
Forward foreign currency exchange contracts - liabilities | $ 0.0 | $ 0.0

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and elected not to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + 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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