Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans (Details 5)

v2.4.0.8
Stock-Based Compensation Plans (Details 5) (Restricted Stock Unit [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 Unit [Member]
     
RSUs, other information      
Weighted-average grant-date fair value for RSUs granted $ 36.37 $ 28.59 $ 27.67
Total intrinsic value of RSUs vested $ 18.3 $ 15.5 $ 11.0
Total grant-date fair value of RSUs vested $ 12.1 $ 13.4 $ 9.5