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Other Property and Equipment Other Property and Equipment - Assets Held For Sale Table (Details) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2014
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Dec. 31, 2013
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| Long Lived Assets Held-for-sale [Line Items] | ||
| Property and equipment held for sale, net | $ 247 | $ 730 |
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Property, Plant and Equipment, Other Types [Member]
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| Long Lived Assets Held-for-sale [Line Items] | ||
| Property and equipment held for sale, net | 183 | 405 |
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Compressor [Member]
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| Long Lived Assets Held-for-sale [Line Items] | ||
| Property and equipment held for sale, net | 64 | 285 |
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Exploration and Production Equipment [Member]
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| Long Lived Assets Held-for-sale [Line Items] | ||
| Property and equipment held for sale, net | 0 | 29 |
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Natural Gas Processing Plant [Member]
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| Long Lived Assets Held-for-sale [Line Items] | ||
| Property and equipment held for sale, net | $ 0 | $ 11 |