The company has a number of stock-based compensation plans including stock options, RSUS, and employee stock purchase plans. The company reports the following activity for its stock options. In millions Outstanding on January 1, 2015 Granted .... Exercised..... Forfeited/expired Outstanding on December 31, 2015... Shares 305 13 (44) (8) 266 The company also reports the following information in its footnotes. Total stock-based compensation expense of $236 million for 2015 Fair value of stock options granted during 2015 of $4.38 per share and the options' strike price was $41.89 Granted 1,857 thousand performance share units during 2015 with a fair value of $37.99 per share Question: How did the company's stock-based compensation expense affect net income for the year