XML 29 R43.htm IDEA: XBRL DOCUMENT v3.20.1
Financial Instruments, Derivatives and Hedging Activities - Commodity price hedging (Details)
bu in Millions, MMBTU in Millions, $ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
MMBTU
bu
Dec. 31, 2019
USD ($)
Financial instruments, derivatives and hedging activities    
Accumulated gains (losses) from derivative instruments, net of tax effect $ (1,322) $ (1,158)
Commodity Contracts | Minimum    
Financial instruments, derivatives and hedging activities    
Maturity period of price risk derivative 12 months  
Commodity Contracts | 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 85  
Natural Gas Commodity    
Financial instruments, derivatives and hedging activities    
Natural gas futures contract (in mmbtu) | MMBTU 31  
Cash Flow Hedging    
Financial instruments, derivatives and hedging activities    
Accumulated gains (losses) from derivative instruments, net of tax effect $ (39) (9)
Cash Flow Hedging | Commodity Contracts    
Financial instruments, derivatives and hedging activities    
Accumulated gains (losses) from derivative instruments, net of tax effect (33) (11)
Tax effect on gains (losses) of derivative instruments $ 13 $ 5