Quarterly report pursuant to Section 13 or 15(d)

Basic and Diluted Earnings Per Share (Details)

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Basic and Diluted Earnings Per Share (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Nov. 30, 2013
Nov. 30, 2012
Basic earnings per share:        
Net income $ 158.7 $ 147.9 $ 321.5 $ 301.0
Weighted-average common shares outstanding 364.9 363.6 365.1 363.3
Basic earnings per share $ 0.43 $ 0.41 $ 0.88 $ 0.83
Diluted earnings per share:        
Net income $ 158.7 $ 147.9 $ 321.5 $ 301.0
Weighted-average common shares outstanding 364.9 363.6 365.1 363.3
Dilutive effect of common share equivalents 1.5 0.8 1.4 0.8
Weighted-average common shares outstanding, assuming dilution 366.4 364.4 366.5 364.1
Diluted earnings per share $ 0.43 $ 0.41 $ 0.88 $ 0.83
Weighted-average anti-dilutive common share equivalents 0.8 7.5 0.8 7.5