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Price Risk Management Activities (Details) bu in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) MBbls bu	Mar. 31, 2019 USD ($)
Price Risk Management Activities (Textual)
Compliance program costs | $	$ 19,952	$ 21,978
Environmental Compliance Program Price Risk [Member]
Price Risk Management Activities (Textual)
Compliance program costs | $	$ 112	$ 91
Derivatives Designated as Hedges [Member] | Cash Flow Hedges [Member] | Future, 2020 Maturity [Member] | Long (Purchases) [Member] | Renewable Diesel (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	1,627
Derivatives Designated as Hedges [Member] | Cash Flow Hedges [Member] | Future, 2020 Maturity [Member] | Short (Sales) [Member] | Renewable Diesel (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	2,317
Derivatives Designated as Hedges [Member] | Cash Flow Hedges [Member] | Future, 2021 Maturity [Member] | Long (Purchases) [Member] | Renewable Diesel (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	0
Derivatives Designated as Hedges [Member] | Cash Flow Hedges [Member] | Future, 2021 Maturity [Member] | Short (Sales) [Member] | Renewable Diesel (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	0
Derivatives Designated as Economic Hedges [Member] | Future, 2020 Maturity [Member] | Long (Purchases) [Member] | Crude Oil and Refined Petroleum Products (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	126,944
Derivatives Designated as Economic Hedges [Member] | Future, 2020 Maturity [Member] | Long (Purchases) [Member] | Corn (in thousands of bushels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume | bu	52,160
Derivatives Designated as Economic Hedges [Member] | Future, 2020 Maturity [Member] | Short (Sales) [Member] | Crude Oil and Refined Petroleum Products (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	126,954
Derivatives Designated as Economic Hedges [Member] | Future, 2020 Maturity [Member] | Short (Sales) [Member] | Corn (in thousands of bushels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume | bu	64,335
Derivatives Designated as Economic Hedges [Member] | Future, 2021 Maturity [Member] | Long (Purchases) [Member] | Crude Oil and Refined Petroleum Products (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	56
Derivatives Designated as Economic Hedges [Member] | Future, 2021 Maturity [Member] | Long (Purchases) [Member] | Corn (in thousands of bushels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume | bu	0
Derivatives Designated as Economic Hedges [Member] | Future, 2021 Maturity [Member] | Short (Sales) [Member] | Crude Oil and Refined Petroleum Products (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	56
Derivatives Designated as Economic Hedges [Member] | Future, 2021 Maturity [Member] | Short (Sales) [Member] | Corn (in thousands of bushels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume | bu	50
Derivatives Designated as Economic Hedges [Member] | Options, 2020 Maturity [Member] | Long (Purchases) [Member] | Crude Oil and Refined Petroleum Products (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	800
Derivatives Designated as Economic Hedges [Member] | Options, 2020 Maturity [Member] | Short (Sales) [Member] | Crude Oil and Refined Petroleum Products (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	800
Derivatives Designated as Economic Hedges [Member] | Options, 2021 Maturity [Member] | Long (Purchases) [Member] | Crude Oil and Refined Petroleum Products (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	0
Derivatives Designated as Economic Hedges [Member] | Options, 2021 Maturity [Member] | Short (Sales) [Member] | Crude Oil and Refined Petroleum Products (in thousands of barrels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume	0
Derivatives Designated as Economic Hedges [Member] | Physical Contracts, 2020 Maturity [Member] | Long (Purchases) [Member] | Corn (in thousands of bushels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume | bu	15,731
Derivatives Designated as Economic Hedges [Member] | Physical Contracts, 2021 Maturity [Member] | Long (Purchases) [Member] | Corn (in thousands of bushels) [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives, volume | bu	549
Derivatives Designated as Economic Hedges [Member] | Foreign Exchange Contract, US Dollars [Member]
Price Risk Management Activities (Textual)
Monetary notional amount of derivative liabilities | $	$ 220
Derivatives Designated as Economic Hedges [Member] | Foreign Exchange Contract, US Dollar Equivalent Canadian Dollars [Member]
Price Risk Management Activities (Textual)
Monetary notional amount of derivative liabilities | $	2,500
Derivatives Designated as Economic Hedges [Member] | Foreign Exchange Contract, Maturity on or Before April 24, 2020 [Member]
Price Risk Management Activities (Textual)
Monetary notional amount of derivative liabilities | $	1,200
Derivatives Designated as Economic Hedges [Member] | Foreign Exchange Contract, Maturity by June 15, 2020 [Member]
Price Risk Management Activities (Textual)
Monetary notional amount of derivative liabilities | $	$ 1,500

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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