Quarterly report [Sections 13 or 15(d)]

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

v3.25.4
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, 2025
Nov. 30, 2024
Nov. 30, 2025
Nov. 30, 2024
Funds Held for Clients and Corporate Investments [Abstract]        
Gross realized gains $ 7.1 $ 0.0 $ 7.1 $ 0.0
Gross realized losses 0.0 0.0 0.0 0.0
Net realized (losses)/gains $ 7.1 $ (0.0) $ 7.1 $ 0.0