Related Party Disclosures (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		12 Months Ended			50 Months Ended
	Jan. 19, 2022	May 31, 2022	May 31, 2021	May 31, 2020	May 31, 2022
Related Party Transactions [Abstract]
Amount of stock repurchased in period		$ 33.4	$ 0.0	$ 35.5	$ 66.1
Related Party Transaction [Line Items]
Amount of stock repurchased in period		$ 33.4	$ 0.0	$ 35.5	$ 66.1
Repurchase of Common Stock | Former Chief Executive Officer, Estate
Related Party Transactions [Abstract]
Shares of stock repurchased (in shares)	300
Treasury Stock Acquired, Cost Per Share	$ 40.65
Amount of stock repurchased in period	$ 12.2
Treasury Stock, Discount, Percent	4.20%
Related Party Transaction [Line Items]
Shares of stock repurchased (in shares)	300
Treasury Stock Acquired, Cost Per Share	$ 40.65
Amount of stock repurchased in period	$ 12.2
Treasury Stock, Discount, Percent	4.20%
Average cost of stock repurchased (in Dollars per share)	$ 42.43