75000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - Statements of Net Assets Available for Benefits link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - Statements of Changes in Net Assets Available for Benefits link:presentationLink link:calculationLink link:definitionLink 75030 - Disclosure - Plan Description link:presentationLink link:calculationLink link:definitionLink 75040 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 75050 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 75060 - Disclosure - Risks and Uncertainties link:presentationLink link:calculationLink link:definitionLink 75070 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 75080 - Disclosure - Tax Status link:presentationLink link:calculationLink link:definitionLink 75090 - Disclosure - Reconciliation of Financial Statements to Irs Form 5500 link:presentationLink link:calculationLink link:definitionLink 75100 - Disclosure - Schedule of Assets (Held at End of Year) link:presentationLink link:calculationLink link:definitionLink 75110 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 75120 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 75130 - Disclosure - Reconciliation of Financial Statements to Irs Form 5500 (Tables) link:presentationLink link:calculationLink link:definitionLink 75140 - Disclosure - Schedule of Assets (Held at End of Year) (Tables) link:presentationLink link:calculationLink link:definitionLink 75150 - Disclosure - Plan Description - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75160 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75170 - Disclosure - Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 75180 - Disclosure - Risks and Uncertainties - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75190 - Disclosure - Related Party Transactions - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75200 - Disclosure - Tax Status - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75210 - Disclosure - Reconciliation of Financial Statements to Irs Form 5500 - Reconciliation Between Net Assets Available for Benefits as Reported in Financial Statements to IRS Form 5500 (Details) link:presentationLink link:calculationLink link:definitionLink 75220 - Schedule - Schedule of Assets (Held at End of Year) (Details) link:presentationLink link:calculationLink link:definitionLink 75220 - Schedule - Schedule of Assets (Held at End of Year) (Details) [Default] link:presentationLink link:calculationLink link:definitionLink 75230 - Schedule - Schedule of Assets (Held at End of Year) (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink Employee Benefit Plan Reclassifications [Policy Text Block] Employee benefit plan reclassifications. Reclassifications EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefits paid to participants Benefits paid to participants Fair Value, Inputs, Level 2 [Member] Significant Other Observable Inputs (Level 2) EBP, Related Party and Party-in-Interest Transactions [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Employee benefit plan, forfeited nonvested account, decrease from employer contribution EBP, Tax Status [Abstract] EBP, Forfeited Nonvested Account Employee benefit plan, forfeited non-vested balance Plan Description EBP, Description of Plan [Text Block] EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Interest income on notes receivable from participants Investment, Identifier [Axis] EBP, Description of Plan [Line Items] EBP, Employer Contribution, Matching Percentage Employee benefit plan, employer contribution, matching percentage EBP, Investment, Issuer Name [Extensible Enumeration] EBP, Investment, Fair Value and NAV [Abstract] Employee Benefit Plan Collective Investment Trusts Measured At Fair Value [Member] Employee benefit plan collective investment trusts measured at fair value. CITs Measured at Fair Value Employee benefit plan, additional participant contribution Employee Benefit Plan Additional Participant Contribution Employee benefit plan additional participant contribution. EBP, Accounting Policy [Line Items] FIAM Core Plus CIT Class I Fund [Member] FIAM Core Plus CIT Class I Fund. FIAM Core Plus CIT Class I Fund EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan Transfers from other qualified plans Increase in net assets available for benefits resulting from participant reinvestments into Plan Number of fund elections Employee Benefit Plan Number of Fund Elections Employee benefit plan number of fund elections. EBP, Schedule of Asset Held for Investment [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] Employee Benefit Plan Schedule Of Assets Held At End Of Year [TextBlock] Employee benefit plan schedule of assets held at end of year. Schedule of Assets (Held at End of Year) Great Gray Trust EuroPacific Growth Trust Fund Class CT [Member] Great Gray Trust EuroPacific Growth Trust Fund Class CT. Great Gray Trust EuroPacific Growth Trust Fund Class CT EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Employee benefit plan, participant account, maximum borrowing amount EBP, Change in Net Assets Available for Benefits EBP, Change in net assets available for benefits. Change in net assets available for benefits Collective Investment Trusts Common Collective Trust [Member] Amendment Flag Amendment Flag EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash, Total Employer, net of forfeitures Employee benefit plan, participant account, minimum borrowing amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP, Payment to Participant [Policy Text Block] Payment of Benefits EBP, Schedule of Asset Held for Investment [Line Items] Fair Value Hierarchy and NAV [Axis] EBP, Employer, Common Stock Fund [Member] Paychex ESOP Stock Fund Paychex Common Stock EBP, Investment, Current Value, Type [Extensible Enumeration] Investment Type [Axis] Columbia Trust Dividend Income Fund Institutional 300 [Member] Columbia Trust Dividend Income Fund Institutional 300. Columbia Trust Dividend Income Fund Institutional 300 Document Type Document Type EBP, Participant-Directed [Member] Directed Participant Glenmede Small-Cap Equity Portfolio Fund [Member] Glenmede Small-Cap Equity Portfolio Fund. Glenmede Small-Cap Equity Portfolio Fund Entity Central Index Key Entity Central Index Key Subsequent Event Type [Domain] Fidelity Small Cap Growth K6 Fund Fidelity Small Cap Growth K6 Fund [Member] Fidelity Small Cap Growth K6 Fund. EBP, Investment [Policy Text Block] Investment Valuation and Income Recognition T. Rowe Price Retirement Hybrid Target Date Funds 2005 - 2065 T. Rowe Price Retirement Hybrid Target Date Funds 2005 - 2065 [Member] T. Rowe Price Retirement Hybrid Target Date Funds 2005 - 2065. EBP, Contribution, Participating Employer [Axis] EBP, Accounting Policy [Table] EBP, Basis of Accounting [Policy Text Block] Basis of Accounting Current Fiscal Year End Date Current Fiscal Year End Date EBP, Description of Plan [Table] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] Paychex Common Stock EBP, Employer, Common Stock [Member] Subsequent Event [Member] Subsequent Event Dividends and interest income EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment, Total EBP, Form 5500 Caption, Net Assets Net assets available for benefits - IRS Form 5500 Fidelity Small Cap Index Fund Fidelity Small Cap Index Fund [Member] Fidelity Small Cap Index Fund. EBP, Noninterest-Bearing Cash Cash EBP, Investment, Number of Shares Units/Shares Number of shares held Minimum [Member] Minimum Related Party Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] Matching Contribution Percentage Of First Three Percent Of Employees Eligible Pay [Member] Matching contribution percentage of first three percent of employees eligible pay. First 3% of Employees Eligible Pay Contribution Fair Value, Inputs, Level 3 [Member] Significant Unobservable Inputs (Level 3) Investment income: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment [Abstract] EBP, Change in Net Asset Available for Benefit, Increase from Contribution Employee benefit plan, net assets available for benefits Total contributions Columbia Trust Dividend Income Fund CAP Class Columbia Trust Dividend Income Fund CAP Class [Member] Columbia Trust Dividend Income Fund CAP Class. EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Expense [Policy Text Block] Administrative Expenses Fair Value Measured at Net Asset Value Per Share [Member] CITs Measured at NAV EBP, Statement of Net Asset Available for Benefit [Abstract] Participant EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Tax determination letter, date EBP, Tax Determination Letter, Date EBP, Contribution, Participating Employer [Domain] EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Ending Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Beginning Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Total Investments Fair market value of common stock Investments at fair value EBP, Use of Estimate [Policy Text Block] Use of Estimates Next 2% of Employees Eligible Pay Contribution Matching Contribution Percentage Of Next Two Percent Of Employees Eligible Pay [Member] Matching contribution percentage of next two percent of employees eligible pay. EBP 001[Member] EBP 001. EBP 001 Mutual Funds Mutual Fund [Member] Entity [Domain] Employee benefit plan, participant loan, variable interest rate description Employee Benefit Plan, Participant Loan, Variable Interest Rate Description Employee benefit plan, participant loan, variable interest rate description. EBP, Summary of Accounting Policy [Text Block] Summary of Significant Accounting Policies Employee Benefit Plan Participant Loan Maturity Month And Year Employee benefit plan, participant loan, maturity month and year. Employee benefit plan, participant loan, maturity month and year Employee benefit plan, asset held for investment, participant loan, maturity month and year EBP, Investment, Fair Value and NAV [Text Block] Fair Value Measurements Employee Benefit Plan Increase in Participant Contribution Eligible Compensation Percentage Employee benefit plan increase in participant contribution eligible compensation percentage. Employee benefit plan, increase in participant contribution percentage EBP, Description of Plan and Accounting Change [Abstract] EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] Reconciliation Between Net Assets Available for Benefits as Reported in Financial Statements to IRS Form 5500 EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Participant loans Employee Benefit Plan Annuity Fund [Member] Employee benefit plan annuity fund. Annuity Fund Annuity Funds EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Statistical Measurement [Domain] EBP, Note Receivable from Participant Notes receivable from participants Document Period End Date Document Period End Date EBP, Risk and Uncertainty [Table] Fair Value Hierarchy and NAV [Domain] Employee benefit plan, participant account, maximum borrowing, to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Tax determination letter, obtained EBP, Tax Determination Letter, Obtained [true false] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Subsequent Event [Policy Text Block] Subsequent Events EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] JPM CB Large Cap Growth Fund CF-A Class [Member] JPM CB Large Cap Growth Fund CF-A Class. JPM CB Large Cap Growth Fund CF-A Class EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount Employee benefit plan, participant contribution, pretax, maximum annual compensation, amount Cover [Abstract] Investments [Domain] Employee benefit plan, number of participants EBP, Number of Participants EBP, Risk and Uncertainty [Abstract] EBP, Net Asset Available for Benefit Net assets available for benefits Net assets available for benefits - financial statements Net assets available for benefits at beginning of year Net assets available for benefits at end of year EBP, Investment, Fair Value and NAV [Table Text Block] Schedule of Financial Assets Measured at Fair Value on Recurring Basis EBP, Schedule of Asset Held for Investment [Abstract] MFS Mid Cap Value Fund CT [Member] MFS Mid Cap Value Fund CT. MFS Mid Cap Value Fund CT EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Current Value EBP, Note Receivable from Participant [Policy Text Block] Notes Receivable from Participants EBP, Schedule of Asset Held for Investment [Table Text Block] Schedule of Assets EBP, Statement of Net Asset Available for Benefit [Table] Document Fiscal Year Focus Document Fiscal Year Focus EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment, Total Net realized and unrealized appreciation in fair value of investments EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Allocation Status [Extensible Enumeration] EBP, Employer Contribution, Participant Compensation Matched, Percentage Employee benefit plan, employer contribution, participant compensation matched, percentage Employee Benefit Plan Participant Loan Origination Fee Employee benefit plan participant loan origination fee. Employee benefit plan, participant loan origination fee Fidelity Mid Cap Index Fund [Member] Fidelity Mid Cap Index Fund. Fidelity Mid Cap Index Fund EBP, Statement of Change in Net Asset Available for Benefit [Table] Employee Benefit Plan, Participant Loan, Basis Spread on Variable Rate Employee benefit plan, participant loan, basis spread on variable rate. Employee benefit plan, participant loan, variable interest rate EBP, Contribution [Policy Text Block] Contributions EBP, Plan Number EBP, Investment, Fair Value and NAV [Line Items] Legal Entity [Axis] EBP, Plan Name Less: deemed distributions - defaulted loans EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Deemed Distribution Less: deemed distributions - defaulted loans EBP, Risk and Uncertainty [Line Items] EBP, Asset [Abstract] Assets EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Total investment income Subsequent Event Type [Axis] Fidelity 500 Index Fund Fidelity 500 Index Fund [Member] Fidelity 500 Index Fund. Employee Benefit Plan Participant Contribution Eligible Compensation Percentage Employee benefit plan participant contribution eligible compensation percentage. Employee benefit plan, participant contribution percentage Fidelity Global ex U.S. Index Fund [Member] Fidelity Global ex U.S. Index Fund. Fidelity Global ex U.S. Index Fund EBP, Investment, Fair Value and NAV [Table] EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Participant rollovers EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Total assets held for investment purposes EBP, Asset Held for Investment EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Tax Status [Text Block] Tax Status Maximum Maximum [Member] Statistical Measurement [Axis] EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Entity Registrant Name Entity Registrant Name EBP, Asset Held for Investment, Participant Loan, Interest Rate Employee benefit plan, participant loan, interest rate Employee benefit plan, asset held for investment, participant loan, interest rate EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Reconciliation of Financial Statements to Irs Form 5500 Vanguard Short-Term Bond Index Fund Class IS [Member] Vanguard Short-Term Bond Index Fund Class IS. Vanguard Short-Term Bond Index Fund Class IS Fidelity Total Bond K6 Fund [Member] Fidelity Total Bond K6 Fund. Fidelity Total Bond K6 Fund EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Fidelity Government Money Market Fund [Member] Fidelity Government Money Market Fund. Fidelity Government Money Market Fund ClearCourse Group Variable Annuity ClearCourse Group Variable Annuity Funds [Member] ClearCourse group variable annuity funds. EBP, Risk and Uncertainty [Text Block] Risks and Uncertainties Fair Value, Inputs, Level 1 [Member] Quoted Prices in Active Markets (Level 1) Employee Benefit Plan Recent Accounting Pronouncements [Policy Text Block] Employee benefit plan recent accounting pronouncements. Recently Adopted and Issued Accounting Pronouncements EBP, Tax Status [Line Items] Entity Tax Identification Number Fidelity U.S. Bond Index Fund Fidelity U.S. Bond Index Fund [Member] Fidelity U.S. Bond Index Fund. EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Change in net assets available for benefits, before transfers Administrative expenses Employee Benefit Plan Administration Cost Paid Employee benefit plan administration cost paid. EBP, Tax Status [Table] EBP, Asset Held for Investment, Party-in-Interest [true false] T. Rowe Price Retirement Hybrid 2010 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2045 Trust Class T14. Paychex ESOP Stock Fund. T. Rowe Price Retirement Hybrid 2025 Trust Class T14. T. Rowe Price Retirement Hybrid 2045 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2050 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2005 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2065 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2025 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2030 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2010 Trust Class T14. T. Rowe Price Retirement Hybrid 2040 Trust Class T14. T. Rowe Price Retirement Hybrid 2060 Trust Class T14. T. Rowe Price Retirement Hybrid 2060 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2040 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2055 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2065 Trust Class T14. T. Rowe Price Retirement Hybrid 2050 Trust Class T14. T. Rowe Price Retirement Hybrid 2020 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2015 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2035 Trust Class T14. Paychex ESOP Stock Fund [Member] T. Rowe Price Retirement Hybrid 2005 Trust Class T14. T. Rowe Price Retirement Hybrid 2030 Trust Class T14. T. Rowe Price Retirement Hybrid 2015 Trust Class T14. T. Rowe Price Retirement Hybrid 2020 Trust Class T14. T. Rowe Price Retirement Hybrid 2035 Trust Class T14 [Member] T. Rowe Price Retirement Hybrid 2055 Trust Class T14.