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Derivatives And Hedging Activities Notional Amount of Forward Contracts (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
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Foreign Exchange Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Derivative, Notional Amount | $ 60.4 | $ 94.7 | $ 56.3
Forward contracts related to tobacco purchase [Member] | Derivatives Designated As Hedges [Member] |  |  |
Derivative [Line Items] |  |  |
Derivative, Notional Amount | 43.3 | 70.7 | 43.1
Forward contracts related to tobacco processing costs [Member] | Derivatives Not Designated As Hedges [Member] |  |  |
Derivative [Line Items] |  |  |
Derivative, Notional Amount | $ 17.1 | $ 24.0 | $ 13.2

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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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