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 9 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Feb. 28, 2014
Feb. 28, 2013
Basic earnings per share:        
Net income $ 160.1 $ 144.5 $ 481.6 $ 445.5
Weighted-average common shares outstanding 364.2 363.8 364.8 363.5
Basic earnings per share $ 0.44 $ 0.40 $ 1.32 $ 1.23
Diluted earnings per share:        
Net income $ 160.1 $ 144.5 $ 481.6 $ 445.5
Weighted-average common shares outstanding 364.2 363.8 364.8 363.5
Dilutive effect of common share equivalents 1.6 0.8 1.5 0.7
Weighted-average common shares outstanding, assuming dilution 365.8 364.6 366.3 364.2
Diluted earnings per share $ 0.44 $ 0.40 $ 1.31 $ 1.22
Weighted-average anti-dilutive common share equivalents 0.1 7.0 0.6 7.3