Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans (Details 7)

v2.4.0.8
Stock-Based Compensation Plans (Details 7) (Restricted Stock [Member], USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
May 31, 2014
May 31, 2013
May 31, 2012
Restricted Stock [Member]
     
Nonvested/unearned shares, other information      
Granted, Weighted-average grant-date fair value per share $ 38.53 $ 31.76 $ 30.69
Total grant-date fair value of restricted stock vested $ 3.3 $ 2.1 $ 3.2