Earnings per Share - Computation of Earnings per Share (EPS) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Earnings Per Share [Abstract] | ||||||||||
| Net income (loss) | $ 259 | $ 1,599 | $ 607 | |||||||
| Less: Net income (loss) attributable to non-controlling interests | 59 | 73 | 68 | |||||||
| Net income (loss) attributable to stockholders | $ 200 | $ 1,526 | $ 539 | |||||||
| Weighted average number of shares outstanding (after deduction of treasury shares) during the year | 338,477 | 239,764 | 237,954 | |||||||
| Plus incremental shares from assumed conversion of: | ||||||||||
| Options | [1] | 5,582 | 6,194 | 6,753 | ||||||
| Restricted Share Units, Performance Share Units and Equity Rights | [2] | 3,548 | 4,158 | 3,902 | ||||||
| Warrants | [3] | 0 | 0 | 0 | ||||||
| Dilutive potential common share | 9,130 | 10,352 | 10,655 | |||||||
| Adjusted weighted average number of shares outstanding (after deduction of treasury shares) during the year | [1] | 347,607 | 250,116 | 248,609 | ||||||
| Basic net income (loss) | $ 0.59 | $ 6.36 | $ 2.27 | |||||||
| Diluted net income (loss) | $ 0.58 | $ 6.10 | $ 2.17 | |||||||
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