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Earnings per Share - Computation of Earnings per Share (EPS) (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Earnings Per Share [Abstract]      
Net income (loss) $ 2,258 $ 2,272 $ 259
Less: Net income (loss) attributable to non-controlling interests 50 57 59
Net income (loss) attributable to stockholders $ 2,208 $ 2,215 $ 200
Weighted average number of shares outstanding (after deduction of treasury shares) during the year 325,781 338,646 338,477
Plus incremental shares from assumed conversion of:      
Options [1] 1,145 4,517 5,582
Restricted Share Units, Performance Share Units and Equity Rights [2] 1,680 2,639 3,548
Warrants [3] 0 0 0
Dilutive potential common share 2,825 7,156 9,130
Adjusted weighted average number of shares outstanding (after deduction of treasury shares) during the year [1] 328,606 345,802 347,607
Basic net income (loss) $ 6.78 $ 6.54 $ 0.59
Diluted net income (loss) $ 6.72 $ 6.41 $ 0.58
[1] Stock options to purchase up to 0.1 million shares of NXP’s common stock that were outstanding in 2018 (2017: 0.1 million shares; 2016: 1.4 million shares) were anti-dilutive and were not included in the computation of diluted EPS because the exercise price was greater than the average fair market value of the common stock or the number of shares assumed to be repurchased using the proceeds of unrecognized compensation expense and exercise prices was greater than the weighted average number of shares underlying outstanding stock options.
[2] Unvested RSU’s, PSU’s and equity rights of 0.9 million shares that were outstanding in 2018 (2017: 0.7 million shares; 2016: 0.9 million shares) were anti-dilutive and were not included in the computation of diluted EPS because the number of shares assumed to be repurchased using the proceeds of unrecognized compensation expense was greater than the weighted average number of outstanding unvested RSU’s, PSU’s and equity rights or the performance goal has not been met.
[3] Warrants to purchase up to 11.2 million shares of NXP’s common stock at a price of $132.55 per share were outstanding in 2018 (2017: 11.2 million shares at a price of $133.32; 2016: 11.2 million shares at a price of $133.32). Upon exercise, the warrants will be net share settled. At the end of 2018, 2017 and 2016, the warrants were not included in the computation of diluted EPS because the warrants’ exercise price was greater than the average fair market value of the common shares.