v3.6.0.2

Stockholders' Equity - Schedule of Transactions from Employee Option and Share Plans (Detail) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Equity [Abstract] |  |  |
Total shares in treasury at beginning of year | 3,998,982 |  |
Total cost | $ 342 |  |
Shares acquired under repurchase program | 15,537,868 |  |
Average price in $ per share | $ 82.36 |  |
Amount paid | $ 1,280 | $ 475 | $ 1,435
Shares delivered | 8,926,870 |  |
Average price in $ per share | $ 79.25 |  |
Amount received | $ 115 |  |
Total shares in treasury at end of year | 10,609,980 | 3,998,982 |
Total cost | $ 915 | $ 342 |

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