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Price Risk Management Activities (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended | 1 Months Ended |
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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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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