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)

v3.25.2
Funds Held for Clients and Corporate Investments (Classification of Investments on Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
May 31, 2025
May 31, 2024
Funds Held for Clients and Corporate Investments [Abstract]    
Funds held for clients $ 4,813.3 $ 3,706.2
Corporate investments 34.5 33.9
Long-term corporate investments 0.0 3.7
Total funds held for clients and corporate investments, Fair value $ 4,847.8 $ 3,743.8