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Commitments and Contingencies Commitments (Details)
$ in Millions
12 Months Ended
Apr. 30, 2020
USD ($)
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]  
Total purchase obligation, 2021 $ 11
Total purchase obligation, 2022 6
Total purchase obligation, 2023 $ 3
Agave [Member]  
Commitments (Textual) [Abstract]  
Agave purchase contract, period (years) 10 years
Total obligations $ 29