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Income Taxes - Domestic and Foreign Components of Income Before Income Taxes (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Tax Disclosure [Abstract] |  |  |
Income before income taxes, Domestic | $ (1,577) | $ 1,415 | $ 1,362
Income before income taxes, Foreign | 988 | 2,079 | 1,762
Income before income taxes | $ (589) | $ 3,494 | $ 3,124

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- Definition Income before income taxes. + References No definition available. + Details
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- Definition Income before income taxes domestic. + References No definition available. + Details
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- Definition Income before income taxes foreign. + References No definition available. + Details
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- References No definition available. + Details
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