Goodwill and Other Intangible Assets (Schedule of components of goodwill and other intangible assets) (Details) - USD ($) $ in Millions	Feb. 28, 2021	May 31, 2020
Goodwill and Other Intangible Assets [Abstract]
Goodwill	$ 14,034.6	$ 13,923.2
Intangible assets not subject to amortization:
Brands and other indefinite-lived intangibles	6,619.1	6,561.4
Intangible assets subject to amortization:
Franchise agreements, customer relationships, and other finite-lived intangibles	817.5	777.8
Less accumulated amortization	(288.3)	(243.4)
Intangible assets subject to amortization, net	529.2	534.4
Other intangible assets	7,148.3	7,095.8
Total	$ 21,182.9	$ 21,019.0