text: No performance share units were earned and vested in 2014. As of January 31, 2015, our current and non-current other liabilities included a 
  total of $8 for performance share units. As of January 31, 2015, the remaining unrecognized stock-based compensation expense for 
  unvested performance share units was $6, which is expected to be recognized over a weighted-average period of 21 months. 