Quarterly report pursuant to Section 13 or 15(d)

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

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Funds Held for Clients and Corporate Investments (Classification of Investments on Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
Nov. 30, 2024
May 31, 2024
Funds Held for Clients and Corporate Investments [Abstract]    
Funds held for clients $ 3,809.1 $ 3,706.2
Corporate investments 38.0 33.9
Long-term corporate investments 0.0 3.7
Total funds held for clients and corporate investments, Fair value $ 3,847.1 $ 3,743.8