Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
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
Aug. 31, 2018
Aug. 31, 2017
[1]
Basic earnings per share:    
Net income $ 243.6 $ 210.4 [2]
Weighted-average common shares outstanding 359.1 358.9 [2]
Basic earnings per share $ 0.68 $ 0.59 [2]
Diluted earnings per share:    
Dilutive effect of common share equivalents 2.4 2.4
Weighted-average common shares outstanding, assuming dilution 361.5 361.3 [2]
Diluted earnings per share $ 0.67 $ 0.58 [2]
Weighted-average anti-dilutive common share equivalents 0.3 1.1
[1] Amounts have been adjusted to reflect the adoption of ASC Topic 606.
[2] Amounts have been adjusted to reflect the adoption of Accounting Standards Codification ("ASC") Topic 606, "Revenue from Contracts with Customers" ("ASC Topic 606").