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v3.23.2

Service Revenue (Summary of PEO Pass-Through Costs Netted in Revenue) (Details) - USD ($) $ in Millions | 12 Months Ended
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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

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- Definition Direct Pass Through Cost Guaranteed Cost Benefit Plans + References No definition available. + Details
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Namespace Prefix: | payx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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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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Namespace Prefix: | payx_
Data Type: | xbrli:monetaryItemType
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- Definition Direct Pass Through Cost State Unemployment Insurance + References No definition available. + Details
Name: | payx_DirectPassThroughCostStateUnemploymentInsurance
Namespace Prefix: | payx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration