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Derivatives Instruments and Hedging Activities - Commodity price hedging (Details)
bu in Millions, MMBTU in Millions
12 Months Ended
Dec. 31, 2021
MMBTU
bu
Dec. 31, 2020
MMBTU
bu
Commodity Contract [Member] | Minimum    
Financial instruments, derivatives and hedging activities    
Maturity period of price risk derivative 12 months  
Commodity Contract [Member] | Maximum    
Financial instruments, derivatives and hedging activities    
Maturity period of price risk derivative 24 months  
Corn Commodity [Member]    
Financial instruments, derivatives and hedging activities    
Futures contract (in bushels for corn and gallons for ethanol) | bu 135 95
Natural Gas Commodity [Member]    
Financial instruments, derivatives and hedging activities    
Natural gas futures contract (in mmbtu) | MMBTU 35 33