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
Aug. 31, 2022
May 31, 2022
Funds Held for Clients and Corporate Investments [Abstract]    
Funds held for clients $ 3,135.8 $ 3,682.9
Corporate investments 45.8 853.9
Long-term corporate investments 3.9 5.0
Total funds held for clients and corporate investments, Fair value $ 3,185.5 $ 4,541.8