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Financial Instruments and Risk Management (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Aug. 31, 2018 | Aug. 31, 2017 | Aug. 31, 2018 | Aug. 31, 2017
Foreign Currency Risk and Currency Exchange Uncertainties |  |  |  |
Net foreign exchange gains (losses), including the impact of currency hedges and currency swaps, in income tax expense | $ 0.2 | $ (0.5) | $ 0.5 | $ (0.6)
SG&A |  |  |  |
Foreign Currency Risk and Currency Exchange Uncertainties |  |  |  |
Net foreign exchange gains (losses), including the impact of currency hedges and currency swaps | $ 0.5 | $ 0.1 | $ (1.2) | $ 0.7
Net sales revenue | Geographic concentration | International operations - transactions denominated in foreign currencies |  |  |  |
Foreign Currency Risk and Currency Exchange Uncertainties |  |  |  |
Concentration risk percentage | 11.00% | 13.00% | 13.00% |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 + Details
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