Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.4
Funds Held for Clients and Corporate Investments (Realized Gains and Losses from Sale of Available-for-sale Securities) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2021
Nov. 30, 2020
Funds Held for Clients and Corporate Investments [Abstract]        
Gross realized gains $ 0.0 $ 0.4 $ 0.1 $ 0.7
Gross realized losses (0.0)   (0.0)  
Net realized gains $ 0.0 $ 0.4 $ 0.1 $ 0.7