Price Risk Management Activities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			1 Months Ended
	Jun. 30, 2014 Biofuels Blending [Member]	Jun. 30, 2013 Biofuels Blending [Member]	Jun. 30, 2014 Biofuels Blending [Member]	Jun. 30, 2013 Biofuels Blending [Member]	Jun. 30, 2014 Foreign Currency Contract [Member]	Jul. 31, 2014 Foreign Currency Contract [Member] Subsequent Event [Member]	Jun. 30, 2014 Fair Value Hedging [Member] MBbls	Jun. 30, 2014 Cash Flow Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Cash Flow Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Cash Flow Hedging [Member] Forward Contracts [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Grain (in thousands of bushels) [Member] bu	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Soybean Oil (in thousands of pounds) [Member] lb	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Grain (in thousands of bushels) [Member] bu	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Soybean Oil (in thousands of pounds) [Member] lb	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Grain (in thousands of bushels) [Member] bu	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Soybean Oil (in thousands of pounds) [Member] lb	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Grain (in thousands of bushels) [Member] bu	Jun. 30, 2014 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Soybean Oil (in thousands of pounds) [Member] lb	Jun. 30, 2014 Economic Hedging [Member] Forward Contracts [Member] Long (Purchases) [Member] Maturity Current Year [Member] Grain (in thousands of bushels) [Member] bu	Jun. 30, 2014 Economic Hedging [Member] Forward Contracts [Member] Long (Purchases) [Member] Maturity Year Two [Member] Grain (in thousands of bushels) [Member] bu	Jun. 30, 2014 Economic Hedging [Member] Swap [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Economic Hedging [Member] Swap [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Economic Hedging [Member] Swap [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Economic Hedging [Member] Swap [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Natural Gas (in billions of BTUs) [Member] MMBTU	Jun. 30, 2014 Commodity [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Natural Gas (in billions of BTUs) [Member] MMBTU	Jun. 30, 2014 Commodity [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Natural Gas (in billions of BTUs) [Member] MMBTU	Jun. 30, 2014 Commodity [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Natural Gas (in billions of BTUs) [Member] MMBTU	Jun. 30, 2014 Commodity [Member] Swap [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Swap [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Swap [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Swap [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Options Held [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Options Held [Member] Long (Purchases) [Member] Maturity Current Year [Member] Natural Gas (in billions of BTUs) [Member] MMBTU	Jun. 30, 2014 Commodity [Member] Options Held [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Options Held [Member] Long (Purchases) [Member] Maturity Year Two [Member] Natural Gas (in billions of BTUs) [Member] MMBTU	Jun. 30, 2014 Commodity [Member] Options Held [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Jun. 30, 2014 Commodity [Member] Options Held [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives							0	6,006	2,793	3,213	89,761	20,770,000	115,440,000	39	5,000	0	108,422	43,805,000	212,520,000	1	3,415,000	0	24,339,000	3,405,000	10,145	0	10,286	30	96,138	250,000	16,519	1,800,000	95,818	750,000	16,194	0	10,650	120	10,650	120	700	500,000	0	0	1,150	0
Price Risk Management Activities (Textual)
Monetary notional amount of derivative liabilities					$ 692
Foreign currency commitments maturity date						Jul. 31, 2014
Compliance program costs	$ 91	$ 137	$ 183	$ 267