text: The aggregate intrinsic value of options exercised during 2014, 2013 and 2012 was $89, $89 and $90. The total fair value of stock options 
  vested during 2014, 2013 and 2012 was $39, $34 and $32. As of January 31, 2015, the total unrecognized stock-based compensation 
  expense related to nonvested stock options was $49, which is expected to be recognized over a weighted-average period of 27 months. 
  
  **Restricted Stock Units**
  Beginning in the quarter ended May 3, 2014, we grant our employees a combination of restricted stock units and stock options. In 2014, 
  restricted stock units granted to employees were approved by the Compensation Committee of our Board of Directors, and are determined 
  based upon a percentage of the recipients’ base salaries’ and the fair value of the restricted stock units. Restricted stock units typically vest 
  over four years. 