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Derivatives Instruments and Hedging Activities - Commodity price hedging (Details)
bu in Millions, MMBTU in Millions, $ in Millions
3 Months Ended
Mar. 31, 2022
USD ($)
MMBTU
bu
Mar. 31, 2021
USD ($)
Dec. 31, 2021
MMBTU
bu
Commodity Contract | Minimum      
Financial instruments, derivatives and hedging activities      
Maturity period of price risk derivative 12 months    
Commodity Contract | Maximum      
Financial instruments, derivatives and hedging activities      
Maturity period of price risk derivative 24 months    
Corn Commodity      
Financial instruments, derivatives and hedging activities      
Futures contract (in bushels for corn and gallons for ethanol) | bu 107   135
Natural Gas Commodity      
Financial instruments, derivatives and hedging activities      
Natural gas futures contract (in mmbtu) | MMBTU 31   35
Not Designated as Hedging Instrument | Corn Commodity      
Financial instruments, derivatives and hedging activities      
Gain or (loss) recognized in income | $ $ 2 $ 1