Annual report [Section 13 and 15(d), not S-K Item 405]

Funds Held for Clients and Corporate Investments (Classification of Investments on Consolidated Balance Sheets) (Details)

v3.26.1
Funds Held for Clients and Corporate Investments (Classification of Investments on Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
May 31, 2026
May 31, 2025
Funds Held for Clients and Corporate Investments [Abstract]    
Funds held for clients $ 4,832.2 $ 4,813.3
Corporate investments 36.3 34.5
Total funds held for clients and corporate investments, Fair value $ 4,868.5 $ 4,847.8