Derivatives And Hedging Activities Notional Amount of Forward Contracts (Details) - Forward Foreign Currency Exchange Contract [Member] - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018
Derivative [Line Items]
Notional amount of derivative contracts	$ 120.0	$ 77.9
Derivatives related to tobacco purchases [Member] | Tobacco purchases [Member]
Derivative [Line Items]
Notional amount of derivative contracts	72.0	59.8
Derivatives related to processing costs [Member] | Processing costs [Member]
Derivative [Line Items]
Notional amount of derivative contracts	26.3	18.1
Derivatives related to processing costs [Member] | Crop input sales [Member]
Derivative [Line Items]
Notional amount of derivative contracts	$ 21.7	$ 0.0