Annual report pursuant to Section 13 and 15(d)

Funds Held for Clients and Corporate Investments (Realized Gains and Losses from Sale of Available-for-sale Securities) (Details)

v3.23.2
Funds Held for Clients and Corporate Investments (Realized Gains and Losses from Sale of Available-for-sale Securities) (Details) - USD ($)
$ in Millions
12 Months Ended
May 31, 2023
May 31, 2022
May 31, 2021
Funds Held for Clients and Corporate Investments [Abstract]      
Gross realized gains $ 0.1 $ 0.2 $ 1.2
Gross realized losses (9.9) 0.0  
Net realized (losses)/gains $ (9.8) $ 0.2 $ 1.2