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Notional Amount of Forward Contracts (Details) - Forward Foreign Currency Exchange Contract [Member] - USD ($) $ in Millions | Sep. 30, 2020 | Sep. 30, 2019
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Derivative [Line Items] |  |
Notional amount of derivative contracts | $ 73.5 | $ 120.0
Derivatives related to tobacco purchases [Member] | Tobacco purchases [Member] |  |
Derivative [Line Items] |  |
Notional amount of derivative contracts | 39.5 | 72.0
Derivatives related to processing costs [Member] | Processing costs [Member] |  |
Derivative [Line Items] |  |
Notional amount of derivative contracts | 10.5 | 26.3
Derivatives related to processing costs [Member] | Crop input sales [Member] |  |
Derivative [Line Items] |  |
Notional amount of derivative contracts | $ 23.5 | $ 21.7

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