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)

v3.20.1
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 9 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 29, 2020
Feb. 28, 2019
Funds Held for Clients and Corporate Investments [Abstract]        
Realized gains $ 0.6 $ 0.4 $ 2.4 $ 0.5
Realized losses   (0.3)   (0.6)
Net realized gains/(losses) $ 0.6 $ 0.1 $ 2.4 $ (0.1)