Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
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 9 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Feb. 28, 2018
Feb. 28, 2017
Basic earnings per share:        
Net income $ 260.4 $ 202.5 $ 705.2 $ 622.0
Weighted-average common shares outstanding 359.2 359.0 359.1 360.0
Basic earnings per share $ 0.72 $ 0.56 $ 1.96 $ 1.73
Diluted earnings per share:        
Dilutive effect of common share equivalents 2.8 2.8 2.5 2.8
Weighted-average common shares outstanding, assuming dilution 362.0 361.8 361.6 362.8
Diluted earnings per share $ 0.72 $ 0.56 $ 1.95 $ 1.71
Weighted-average anti-dilutive common share equivalents   0.7 0.8 0.7