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Basis of Presentation Basis of Presentation (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2014 | Sep. 30, 2013
Basis of Presentation [Abstract] |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 20.00% | 20.00% |
Acquisition of noncontrolling interest | $ (157) | $ (157) | $ 0
Loss on purchase of noncontrolling interest | $ 12 |  |

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- Definition The excess of purchase price over the carrying value of the noncontrolling interest. + References No definition available. + Details
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- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
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