Derivative Financial Instruments (Details)	6 Months Ended
	Jun. 30, 2020 MBbls
Exchange-Traded Derivatives | Long [Member]
Volume of activity related to derivative financial instruments
Nonmonetary units	84,325
Exchange-Traded Derivatives | Short [Member]
Volume of activity related to derivative financial instruments
Nonmonetary units	87,917
OTC Derivatives (Petroleum/Ethanol) | Long [Member]
Volume of activity related to derivative financial instruments
Nonmonetary units	11,185
OTC Derivatives (Petroleum/Ethanol) | Short [Member]
Volume of activity related to derivative financial instruments
Nonmonetary units	7,599