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
	Aug. 31, 2022	Aug. 31, 2021	Feb. 28, 2021
Basic earnings per share:
Net income	$ 379.2	$ 333.6	$ 333.6
Weighted-average common shares outstanding	360.1	360.1
Basic earnings per share	$ 1.05	$ 0.93
Diluted earnings per share:
Net income	$ 379.2	$ 333.6	$ 333.6
Weighted-average common shares outstanding	360.1	360.1
Dilutive effect of common share equivalents	2.3	2.7
Weighted-average common shares outstanding, assuming dilution	362.4	362.8
Diluted earnings per share	$ 1.05	$ 0.92
Weighted-average anti-dilutive common share equivalents	0.4	0.2