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v3.21.1

Service Revenue (Summary of PEO Pass-Through Costs Netted in Revenue) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 28, 2021 | Feb. 29, 2020 | Feb. 28, 2021 | Feb. 29, 2020
Service Revenue [Abstract] |  |  |  |
Payroll wages and payroll taxes | $ 5,500.0 | $ 5,600.0 | $ 15,500.0 | $ 15,900.0
State unemployment insurance (included in payroll wages and payroll taxes) | 73.1 | 47.2 | 98.7 | 73.9
Guaranteed cost benefit plans | $ 146.1 | $ 159.0 | $ 439.6 | $ 489.8

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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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