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v3.20.4

Service Revenue (Summary of PEO Pass-Through Costs Netted in Revenue) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 30, 2020 | Nov. 30, 2019 | Nov. 30, 2020 | Nov. 30, 2019
Service Revenue [Abstract] |  |  |  |
Payroll wages and payroll taxes | $ 5,100.0 | $ 5,200.0 | $ 10,000.0 | $ 10,300.0
State unemployment insurance (included in payroll wages and payroll taxes) | 12.8 | 12.0 | 25.6 | 26.7
Guaranteed cost benefit plans | $ 143.1 | $ 165.0 | $ 293.5 | $ 330.8

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- Definition Direct Pass Through Cost Guaranteed Cost Benefit Plans + References No definition available. + Details
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- Definition Direct Pass Through Cost Payroll Wages And Taxes Including Federal And State Unemployment Insurance + References No definition available. + Details
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- Definition Direct Pass Through Cost State Unemployment Insurance + References No definition available. + Details
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Balance Type: | debit
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- References No definition available. + Details
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