v3.20.4
Stockholders' Equity and Earnings per Share - Computation of Earnings per Share (EPS) (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Earnings per share data:      
Net income (loss) $ 80 $ 272 $ 2,258
Less: Net income (loss) attributable to non-controlling interests 28 29 50
Net income (loss) attributable to stockholders $ 52 $ 243 $ 2,208
Weighted average number of shares outstanding (after deduction of treasury shares) during the year (in shares) 279,763 282,056 325,781
Plus incremental shares from assumed conversion of:      
Options (in shares) 526 776 1,145
Restricted Share Units, Performance Share Units and Equity Rights (in shares) 3,520 3,079 1,680
Dilutive potential common share (in shares) 4,046 3,855 2,825
Adjusted weighted average number of shares outstanding (after deduction of treasury shares) during the year (in shares) 283,809 285,911 328,606
Basic net income (loss) (in dollars per share) $ 0.19 $ 0.86 $ 6.78
Diluted net income (loss) (in dollars per share) $ 0.18 $ 0.85 $ 6.72
Maximum | Stock Options      
Plus incremental shares from assumed conversion of:      
Antidilutive securities excluded from computation of earnings per share (in shares) 0 100 100
Maximum | Unvested RSU's, PSU's and Equity Rights      
Plus incremental shares from assumed conversion of:      
Antidilutive securities excluded from computation of earnings per share (in shares) 600 700 900