Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans (Details 2)

v2.4.0.8
Stock-Based Compensation Plans (Details 2) (Employee Stock Option [Member], USD $)
In Millions, except Per Share data, unless otherwise specified
 12 Months Ended
May 31, 2013
Employee Stock Option [Member]
  
Stock option activity  
Options outstanding, Beginning balance, Shares 10.0
Options outstanding, Beginning balance, Weighted-average exercise price per share $ 33.88
Options granted 1.0
Options granted, Weighted-average exercise price per share $ 31.73
Options exercised (2.4)
Options exercised, Weighted-average exercise price per share $ 31.91
Options forfeited (0.1)
Options forfeited, Weighted-average exercise price per share $ 29.33
Options expired (0.5)
Options expired, Weighted-average exercise price per share $ 35.70
Options outstanding, Ending balance, Shares 8.0
Options outstanding, Ending balance, Weighted-average exercise price per share $ 34.17
Options outstanding, Ending balance, Weighted-average remaining contractual term 4 years 4 months 24 days
Options outstanding, Ending balance, Aggregate intrinsic value $ 26.3
Options exercisable, Ending balance, Shares 6.1
Options exercisable, Ending balance, Weighted-average exercise price per share $ 35.29
Options exercisable, Ending balance, Weighted-average remaining contractual term 3 years 2 months 11 days
Options exercisable, Ending balance, Aggregate intrinsic value $ 13.8