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 9 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 29, 2020
Feb. 28, 2019
Basic earnings per share:        
Net income $ 354.5 $ 324.6 $ 877.4 $ 804.0
Weighted-average common shares outstanding 358.5 359.2 358.5 359.1
Basic earnings per share $ 0.99 $ 0.90 $ 2.45 $ 2.24
Diluted earnings per share:        
Net income $ 354.5 $ 324.6 $ 877.4 $ 804.0
Weighted-average common shares outstanding 358.5 359.2 358.5 359.1
Dilutive effect of common share equivalents 2.5 2.4 2.6 2.5
Weighted-average common shares outstanding, assuming dilution 361.0 361.6 361.1 361.6
Diluted earnings per share $ 0.98 $ 0.90 $ 2.43 $ 2.22
Weighted-average anti-dilutive common share equivalents 0.6 0.6 0.5 0.5