Service Revenue (Summary of PEO Pass-Through Costs Netted in Revenue) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
May 31, 2023 |
May 31, 2022 |
May 31, 2021 |
|
| Revenue from Contract with Customer [Abstract] | |||
| Payroll wages and payroll taxes | $ 26,025.3 | $ 24,209.3 | $ 20,706.1 |
| State unemployment insurance (included in payroll wages and payroll taxes) | 138.2 | 139.1 | 119.0 |
| Guaranteed cost benefit plans | $ 656.3 | $ 641.4 | $ 586.4 |
| X | ||||||||||
- Definition Direct Pass Through Cost Guaranteed Cost Benefit Plans No definition available.
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| X | ||||||||||
- Definition Direct Pass Through Cost Payroll Wages And Taxes Including Federal And State Unemployment Insurance No definition available.
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| X | ||||||||||
- Definition Direct Pass Through Cost State Unemployment Insurance No definition available.
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| X | ||||||||||
- References No definition available.
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