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, 2022
Nov. 30, 2021
Nov. 30, 2022
Nov. 30, 2021
Basic earnings per share:        
Net income $ 360.3 $ 332.1 $ 739.5 $ 665.7
Weighted-average common shares outstanding 360.5 360.7 360.2 360.4
Basic earnings per share $ 1.00 $ 0.92 $ 2.05 $ 1.85
Diluted earnings per share:        
Net income $ 360.3 $ 332.1 $ 739.5 $ 665.7
Weighted-average common shares outstanding 360.5 360.7 360.2 360.4
Dilutive effect of common share equivalents 1.8 2.4 2.1 2.5
Weighted-average common shares outstanding, assuming dilution 362.3 363.1 362.3 362.9
Diluted earnings per share $ 0.99 $ 0.91 $ 2.04 $ 1.83
Weighted-average anti-dilutive common share equivalents 0.9 0.4 0.7 0.3