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Derivative and Financial Instruments - Commodity GainLoss (Details 1) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||||||
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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Sales and other operating revenues [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
| Gains (losses) from commodity derivatives | $ 25 | $ 263 | [1] | $ (183) | $ (140) | [1] | ||
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Other Income [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
| Gains (losses) from commodity derivatives | 1 | 1 | 3 | (5) | ||||
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Purchased commodities [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
| Gains (losses) from commodity derivatives | $ (14) | $ (294) | [1] | $ 171 | $ 104 | [1] | ||
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