Derivative Financial Instruments (Details)	12 Months Ended
	Dec. 31, 2019 MBbls
Exchange-Traded Derivatives | Long [Member]
Volume of activity related to derivative financial instruments
Nonmonetary units	51,838
Exchange-Traded Derivatives | Short [Member]
Volume of activity related to derivative financial instruments
Nonmonetary units	55,869
OTC Derivatives (Petroleum/Ethanol) | Long [Member]
Volume of activity related to derivative financial instruments
Nonmonetary units	9,237
OTC Derivatives (Petroleum/Ethanol) | Short [Member]
Volume of activity related to derivative financial instruments
Nonmonetary units	6,934