Quarterly report pursuant to Section 13 or 15(d)

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

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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 6 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2021
Nov. 30, 2020
Basic earnings per share:        
Net income $ 332.1 $ 272.4 $ 665.7 $ 484.0
Weighted-average common shares outstanding 360.7 360.0 360.4 359.5
Basic earnings per share $ 0.92 $ 0.76 $ 1.85 $ 1.35
Diluted earnings per share:        
Net income $ 332.1 $ 272.4 $ 665.7 $ 484.0
Weighted-average common shares outstanding 360.7 360.0 360.4 359.5
Dilutive effect of common share equivalents 2.4 2.0 2.5 2.1
Weighted-average common shares outstanding, assuming dilution 363.1 362.0 362.9 361.6
Diluted earnings per share $ 0.91 $ 0.75 $ 1.83 $ 1.34
Weighted-average anti-dilutive common share equivalents 0.4 1.3 0.3 1.1