Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets, Net of Accumulated Amortization (Change in Goodwill) (Details)

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Goodwill and Intangible Assets, Net of Accumulated Amortization (Change in Goodwill) (Details) - USD ($)
$ in Millions
12 Months Ended
May 31, 2020
May 31, 2019
Goodwill and Intangible Assets, Net of Accumulated Amortization [Abstract]    
Goodwill Balance, beginning of fiscal year $ 1,782.6 $ 814.0
Changes during the period:    
Goodwill acquired 4.1 972.1
Acquisition accounting adjustments 4.5 1.6
Currency translation adjustment (0.1) (5.1)
Goodwill Balance, end of fiscal year $ 1,791.1 $ 1,782.6