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Financial Instruments (Forward Foreign Exchange Contracts) (Details) - Foreign Exchange Contracts £ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions | Mar. 31, 2019 USD ($) | Mar. 31, 2019 AUD ($) | Mar. 31, 2019 MXN ($) | Mar. 31, 2019 CAD ($) | Mar. 31, 2019 GBP (£)
--- | --- | --- | --- | --- | ---
British Pound Sterling |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Foreign Currency Amount | £ |  |  |  |  | £ 5.0
US Dollar Amount | $ 7.2 |  |  |  |
Weighted average exchange rate per $1 USD | 0.69 | 0.69 | 0.69 | 0.69 | 0.69
Canadian Dollar |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Foreign Currency Amount |  |  |  | $ 20.7 |
US Dollar Amount | $ 16.2 |  |  |  |
Weighted average exchange rate per $1 USD | 1.28 | 1.28 | 1.28 | 1.28 | 1.28
Australia, Dollars |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Foreign Currency Amount |  | $ 3.5 |  |  |
US Dollar Amount | $ 2.7 |  |  |  |
Weighted average exchange rate per $1 USD | 1.27 | 1.27 | 1.27 | 1.27 | 1.27
Mexico, Pesos |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Foreign Currency Amount |  |  | $ 108.3 |  |
US Dollar Amount | $ 5.6 |  |  |  |
Weighted average exchange rate per $1 USD | 19.30 | 19.30 | 19.30 | 19.30 | 19.30

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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 The amount of foreign currency that the entity has contractually agreed, or for which it has the option, to buy or sell with respect to the contract being described. + 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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