Goodwill and Intangible Assets, Net of Accumulated Amortization (Change in Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2022	May 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill Balance, beginning of fiscal year	$ 1,820.7	$ 1,791.1
Changes during the period:
Goodwill acquired	27.7	19.6
Currency translation adjustment	(16.9)	10.0
Goodwill Balance, end of fiscal year	$ 1,831.5	$ 1,820.7