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Derivatives And Hedging Activities (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017
Derivative [Line Items] |  |
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax | $ (0.1) |
Foreign Exchange Forward [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 27.3 | $ 33.0
Cash Flow Hedges [Member] | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 370.0 |

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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 Amount of net unrealized gain (loss) related to the change in fair value of foreign currency exchange rate derivatives designated as cash flow hedging instruments. Recorded in accumulated other comprehensive income to the extent that the cash flow hedge is determined to be effective. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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