Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans (Details 6)

v2.4.0.8
Stock-Based Compensation Plans (Details 6) (Restricted Stock Unit [Member], USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
May 31, 2013
May 31, 2012
May 31, 2011
Restricted Stock Unit [Member]
     
RSUs, other information      
Weighted-average grant-date fair value of RSUs granted $ 28.59 $ 27.67 $ 21.52
Total intrinsic value of RSUs vested $ 15.5 $ 11.0 $ 7.7
Total grant-date fair value of RSUs vested $ 13.4 $ 9.5 $ 8.5