Quarterly report pursuant to Section 13 or 15(d)

Basic and Diluted Earnings Per Share (Basic and Diluted Earnings Per Share) (Details)

v3.5.0.2
Basic and Diluted Earnings Per Share (Basic and Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Aug. 31, 2016
Aug. 31, 2015
Basic and Diluted Earnings Per Share [Abstract]    
Net income $ 217.4 $ 209.1
Weighted-average common shares outstanding 361.0 361.1
Basic earnings per share $ 0.60 $ 0.58
Dilutive effect of common share equivalents 3.1 1.7
Weighted-average common shares outstanding, assuming dilution 364.1 362.8
Diluted earnings per share $ 0.60 $ 0.58
Weighted-average anti-dilutive common share equivalents 0.5 0.5