Price Risk Management Activities (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended																																																		1 Months Ended
	Dec. 31, 2013 Biofuels Blending [Member]	Dec. 31, 2012 Biofuels Blending [Member]	Dec. 31, 2011 Biofuels Blending [Member]	Dec. 31, 2013 Minimum Inventory [Member]	Dec. 31, 2012 Minimum Inventory [Member]	Dec. 31, 2013 Foreign Currency Contract [Member]	Dec. 31, 2013 Fair Value Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Fair Value Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Fair Value Hedging [Member] Forward Contracts [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Cash Flow Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Cash Flow Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Cash Flow Hedging [Member] Forward Contracts [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Grain (In bushels) [Member] bu	Dec. 31, 2013 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Economic Hedging [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Grain (In bushels) [Member] bu	Dec. 31, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Grain (In bushels) [Member] bu	Dec. 31, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Soybean Oil (in thousands of pounds) [Member] lb	Dec. 31, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Grain (In bushels) [Member] bu	Dec. 31, 2013 Economic Hedging [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Soybean Oil (in thousands of pounds) [Member] lb	Dec. 31, 2013 Economic Hedging [Member] Forward Contracts [Member] Long (Purchases) [Member] Maturity Current Year [Member] Grain (In bushels) [Member] bu	Dec. 31, 2013 Economic Hedging [Member] Forward Contracts [Member] Long (Purchases) [Member] Maturity Year Two [Member] Grain (In bushels) [Member] bu	Dec. 31, 2013 Economic Hedging [Member] Swap [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Economic Hedging [Member] Swap [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Economic Hedging [Member] Swap [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Economic Hedging [Member] Swap [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Grain (In bushels) [Member] bu	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Long (Purchases) [Member] Maturity Current Year [Member] Natural Gas (In millions of btus) [Member] MMBTU	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Grain (In bushels) [Member] bu	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Long (Purchases) [Member] Maturity Year Two [Member] Natural Gas (In millions of btus) [Member] MMBTU	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Grain (In bushels) [Member] bu	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Short (Sales) [Member] Maturity Current Year [Member] Natural Gas (In millions of btus) [Member] MMBTU	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Grain (In bushels) [Member] bu	Dec. 31, 2013 Trading Derivatives [Member] Future [Member] Short (Sales) [Member] Maturity Year Two [Member] Natural Gas (In millions of btus) [Member] MMBTU	Dec. 31, 2013 Trading Derivatives [Member] Swap [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Swap [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Swap [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Swap [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Options Held [Member] Long (Purchases) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Options Held [Member] Long (Purchases) [Member] Maturity Year Two [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Options Held [Member] Short (Sales) [Member] Maturity Current Year [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Options Held [Member] Short (Sales) [Member] Maturity Current Year [Member] Natural Gas (In millions of btus) [Member] MMBTU	Dec. 31, 2013 Trading Derivatives [Member] Options Held [Member] Short (Sales) [Member] Maturity Year Two [Member] Crude Oil (In thousands of barrels) [Member] MBbls	Dec. 31, 2013 Trading Derivatives [Member] Options Held [Member] Short (Sales) [Member] Maturity Year Two [Member] Natural Gas (In millions of btus) [Member] MMBTU	Jan. 31, 2014 Subsequent Event [Member] Foreign Currency Contract [Member]
Volume of Outstanding Contracts
Nonmonetary notional amount of price risk derivatives							11,857	12,169	312	7,629	2,314	5,315	42,205	17,110,000	0	0	52,158	26,095,000	25,320,000	0	145,000	0	12,554,000	156,000	7,261	0	7,276	0	84,766	435,000	600,000	3,490	0	1,000,000	84,397	435,000	1,150,000	3,665	0	0	25,200	0	25,200	0	28,850	0	28,600	250,000	0	0
Monetary notional amount of derivative liabilities						$ 716
Price Risk Management Activities (Textual)
Foreign currency commitments maturity date																																																			Jan. 31, 2014
Gain (loss) recognized in income on derivatives																																																			12
Compliance program costs	$ 517	$ 250	$ 231	$ 3	$ 8