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Net Revenues and Operating income for Venezuelan Operations (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]        
Net revenues $ 6,396 $ 6,849 $ 19,153 $ 22,272
Operating income (including the impact of remeasurement losses) $ 702 7,802 $ 2,062 9,454
Venezuela        
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]        
Net revenues   $ 315   $ 834
Percentage of consolidated net revenues   4.60%   3.70%
Operating income (including the impact of remeasurement losses)   $ 73   $ 188
Percentage of consolidated operating income   0.90%   2.00%