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Funds Held for Clients and Corporate Investments (Realized Gains and Losses from Sale of Available-for-sale Securities) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Aug. 31, 2024 | Aug. 31, 2023
Funds Held for Clients and Corporate Investments [Abstract] |  |  |
Gross realized gains | $ 0.0 | $ 0.0 |
Gross realized losses | 0.0 | 0.0 |
Net realized gains/(losses) | $ 0.0 | $ 0.0 | [1]
[1] | The consolidated statement of cash flows for the three months ended August 31, 2023 includes revisions to previously reported amounts related to the presentations of cash flows associated with short-term receivable purchased from the Company's clients under non-recourse arrangements, net of funding reserves. See Note A for further discussion on the revision.

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- Definition Funds held for clients and corporate investments. + References No definition available. + Details
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- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 + Details
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- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 + Details
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- Definition Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 + Details
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