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)

v3.21.2
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, 2021
May 31, 2020
May 31, 2019
Funds Held for Clients and Corporate Investments [Abstract]      
Gross realized gains $ 1.2 $ 11.6 $ 0.6
Gross realized losses   (0.3) $ (0.6)
Net realized gains $ 1.2 $ 11.3