Price Risk Management Activities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		1 Months Ended
	Sep. 30, 2013 Biofuels Blending [Member]	Sep. 30, 2012 Biofuels Blending [Member]	Sep. 30, 2013 Biofuels Blending [Member]	Sep. 30, 2012 Biofuels Blending [Member]	Oct. 31, 2013 Foreign Currency Contract [Member]	Sep. 30, 2013 Foreign Currency Contract [Member]	Sep. 30, 2013 Fair Value Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Fair Value Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Fair Value Hedging [Member] Forward Contracts [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Cash Flow Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Cash Flow Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Cash Flow Hedging [Member] Forward Contracts [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Year Three [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Year Three [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Soybean Oil (in thousands of pounds) [Member] lb	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Soybean Oil (in thousands of pounds) [Member] lb	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Three [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Three [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Three [Member] Soybean Oil (in thousands of pounds) [Member] lb	Sep. 30, 2013 Economic Hedging [Member] Forward Contracts [Member] Long (Purchases) [Member] Maturity Current Year [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Economic Hedging [Member] Forward Contracts [Member] Long (Purchases) [Member] Maturity Year Two [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Economic Hedging [Member] Forward Contracts [Member] Long (Purchases) [Member] Maturity Year Three [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Economic Hedging [Member] Swap [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Swap [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Swap [Member] Long (Purchases) [Member] Maturity Year Three [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Swap [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Swap [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Swap [Member] Short (Sales) [Member] Maturity Year Three [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Economic Hedging [Member] Options Held [Member] Long (Purchases) [Member] Maturity Current Year [Member] Natural Gas (in millions of BTUs) [Member] MMBTU	Sep. 30, 2013 Economic Hedging [Member] Options Held [Member] Long (Purchases) [Member] Maturity Year Two [Member] Natural Gas (in millions of BTUs) [Member] MMBTU	Sep. 30, 2013 Economic Hedging [Member] Options Held [Member] Long (Purchases) [Member] Maturity Year Three [Member] Natural Gas (in millions of BTUs) [Member] MMBTU	Sep. 30, 2013 Commodity [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Commodity [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Natural Gas (in millions of BTUs) [Member] MMBTU	Sep. 30, 2013 Commodity [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Commodity [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Commodity [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Natural Gas (in millions of BTUs) [Member] MMBTU	Sep. 30, 2013 Commodity [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Commodity [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Commodity [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Natural Gas (in millions of BTUs) [Member] MMBTU	Sep. 30, 2013 Commodity [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Commodity [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Commodity [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Natural Gas (in millions of BTUs) [Member] MMBTU	Sep. 30, 2013 Commodity [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Grain (in bushels) [Member] bu	Sep. 30, 2013 Commodity [Member] Swap [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Commodity [Member] Swap [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Commodity [Member] Swap [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Commodity [Member] Swap [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Commodity [Member] Options Held [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Commodity [Member] Options Held [Member] Long (Purchases) [Member] Maturity Current Year [Member] Natural Gas (in millions of BTUs) [Member] MMBTU	Sep. 30, 2013 Commodity [Member] Options Held [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 Commodity [Member] Options Held [Member] Long (Purchases) [Member] Maturity Year Two [Member] Natural Gas (in millions of BTUs) [Member] MMBTU	Sep. 30, 2013 Commodity [Member] Options Held [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (in thousands of barrels) [Member] MBbls	Sep. 30, 2013 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							11,986	15,788	3,802	5,876	2,759	3,117	31,357	19,695,000	75	5,000	0	0	42,753	21,410,000	26,520,000	0	1,500,000	0	0	15,000	0	7,682,000	1,543,000	0	2,867	45	0	1,797	90	0	5,250,000	0	0	121,803	1,150,000	3,200,000	49,298	0	0	122,138	550,000	2,900,000	49,223	0	0	11,484	21,135	11,484	21,135	20,950	3,000,000	10,000	0	20,250	10,000
Monetary notional amount of derivative liabilities						$ 845
Price Risk Management Activities (Textual)
Foreign currency commitments maturity date					Oct. 31, 2013
Compliance program costs	$ 187	$ 72	$ 454	$ 198