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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
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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

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- Definition Carrying amount as of the balance sheet date of the funds held on behalf of others and that are expected to be liquidated within one year or the normal operating cycle, if longer. This does not include funds held under reinsurance agreements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(8)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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