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Financial Instruments and Risk Management - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Feb. 29, 2020 | Feb. 28, 2019 | Feb. 28, 2018
SG&A |  |  |
Foreign Currency Risk and Currency Exchange Uncertainties |  |  |
Net foreign exchange gains (losses), including the impact of currency hedges and currency swaps | $ 2.2 | $ 1.3 | $ (3.1)
Net sales revenue | Geographic concentration | International operations - transactions denominated in foreign currencies |  |  |
Foreign Currency Risk and Currency Exchange Uncertainties |  |  |
Concentration risk percentage | 14.00% |  |

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