Notional Amount of Forward Contracts (Details) - Forward Foreign Currency Exchange Contract [Member] - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
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