Entity tax identification number Entity Tax Identification Number Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum Maximum [Member] Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Mutual funds Mutual Fund [Member] Total Fully Corrected Under VFCP And PTE 2022-51 EBP, Schedule of Delinquent Participant Contribution, Corrected Less: Deemed distributions - defaulted loans at end of year EBP, Reconciliation to Form 5500, Note Receivable, Deemed Distribution Excess contributions payable Less: Excess contributions payable at beginning of year EBP, Reconciliation to Form 5500, Excess Contributions Payable EBP, Reconciliation to Form 5500, Excess Contributions Payable EBP, note receivable from participant, account, basis spread on variable rate EBP, Note Receivable From Participant, Account, Basis Spread On Variable Rate EBP, Note Receivable From Participant, Account, Basis Spread On Variable Rate Schedule of Active Participants Vesting Percentage in Annual Employer Contributions EBP, Schedule of Active Participants Vesting Percentage in Annual Employer Contributions [Table Text Block] EBP, Schedule of Active Participants Vesting Percentage in Annual Employer Contributions EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, participant contribution, pretax, maximum annual compensation to total compensation, percentage EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Total deductions EBP, Change in Net Asset Available for Benefit, Decrease EBP, note receivable from participant, account, maximum borrowing, amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] EBP, note receivable from participant, account, minimum borrowing, amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP, maximum repayment period EBP, Maximum Repayment Period EBP, Maximum Repayment Period Total investments, at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Level 1 Fair Value, Inputs, Level 1 [Member] EBP, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] EBP, net asset value per share or unit (in dollars per share) EBP, Net Asset Value per Share or Unit EBP, Investment, Fair Value and NAV [Abstract] Excess Contributions Payable EBP, Excess Contribution Payable [Policy Text Block] Total assets EBP, Asset Assets EBP, Asset [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] Additions EBP, Change in Net Asset Available for Benefit, Increase [Abstract] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Benefit Payments EBP, Payment to Participant [Policy Text Block] EBP, Trustee EBP, Trustee [Member] EBP, Master Trust [Line Items] EBP, Master Trust [Line Items] Total liabilities EBP, Liability Amendment Flag Amendment Flag Basis of Accounting EBP, Basis of Accounting [Policy Text Block] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] EBP, investment, number of shares EBP, Investment, Number of Shares EBP, investment, interest rate EBP, Investment, Interest Rate EBP, Description of Plan and Accounting Change [Abstract] Receivables: EBP, Receivable [Abstract] EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Table Text Block] EBP, still employed, participant age for distribution EBP, Participant Distribution Minimum Age EBP, Participant Distribution Minimum Age EBP 003 EBP 003 [Member] EBP 003 EBP, Schedule of Delinquent Participant Contribution [Abstract] Investments [Domain] Investments [Domain] EBP, Master Trust [Abstract] Use of Estimates EBP, Use of Estimate [Policy Text Block] EBP, Related Party and Party-in-Interest [Domain] EBP, Related Party and Party-in-Interest [Domain] Schedule H, Line 4i – Schedule of Assets (Held At End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Amounts allocated to participants electing to withdraw from plan but have not yet been paid Less: Amounts allocated to withdrawing participants at end of year EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Allocation to Withdrawing Participant, Not yet Paid Employer, net of forfeitures EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash EBP, Schedule of Delinquent Participant Contribution [Line Items] EBP, Schedule of Delinquent Participant Contribution [Line Items] Less: Amounts allocated to withdrawing participants at beginning of year Add: Amounts allocated to withdrawing participants at beginning of year EBP, Reconciliation to Form 5500, Payment to Participant, Decrease from Allocation to Withdrawing Participant, Paid Prohibited Transactions EBP, Prohibited Transactions [Text Block] EBP, Prohibited Transactions EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Axis] Minimum Minimum [Member] Interest income on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Investment Type [Axis] Investment Type [Axis] Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Contributions: Contributions received from participants per the financial statements EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Deductions from net assets attributed to: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Investment Income (Loss), before Investment Expense [Abstract] Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Interest and dividend income from investments EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Plan number EBP, Plan Number EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of the Plan EBP, Description of Plan [Text Block] Contributions Pending Correction in VFCP EBP, Schedule of Delinquent Participant Contribution, Pending Correction in VFCP EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] EBP, number of investment options offered EBP, Number Of Investment Options Offered EBP, Number Of Investment Options Offered EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] 1 but less than 2 EBP, Vested Percentage, One Years Or Greater But Less Than Two Years EBP, Vested Percentage, One Years Or Greater But Less Than Two Years EBP, Schedule of Asset Held for Investment [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Total additions EBP, Change in Net Asset Available for Benefit, Increase Additions to net assets attributed to: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment, Identifier [Axis] Investment, Identifier [Axis] Administration fees and other EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Total investments, at fair value EBP, Asset Held for Investment Risks and Uncertainties EBP, Risk and Uncertainty [Policy Text Block] Document Information [Line Items] Document Information [Line Items] Net assets available for benefits: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) [Abstract] EBP, employer contribution, participant compensation matched, percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] EBP, involuntary cash-out limit EBP, Involuntary Cash-out Limit EBP, Involuntary Cash-out Limit MSC Industrial Direct Co., Inc. Common Stock MSC Industrial Direct Co., Inc. Class A Common Stock EBP, Employer, Common Stock, Class A [Member] EBP, requisite service period EBP, Requisite Service Period, Number Of Hours EBP, Requisite Service Period, Number Of Hours EBP, employer contribution vesting percentage EBP, Employer Contribution Vesting Percentage EBP, Employer Contribution Vesting Percentage EBP, Form 5500 Caption, Net Income (Loss) EBP, Form 5500 Caption, Net Income (Loss) 2 but less than 3 EBP, Vested Percentage, Two Years Or Greater But Less Than Three Years EBP, Vested Percentage, Two Years Or Greater But Less Than Three Years Contributions Corrected Outside VFCP EBP, Schedule of Delinquent Participant Contribution, Corrected Outside VFCP EBP, Tax Status [Table] EBP, Tax Status [Table] Net increase in net assets Net increase in net assets available for benefits per the financial statements EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Related Party and Party in Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Excess contributions payable Add: Excess contributions payable at end of year EBP, Excess Contribution Payable Total receivables EBP, Receivable Employer contributions EBP, Employer Contribution, Receivable EBP, voluntary cash-out limit EBP, Involuntary Cash-out Limit, Maximum Amount EBP, Involuntary Cash-out Limit, Maximum Amount Investments, at fair value: EBP, Investment, Fair Value [Abstract] Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Current Value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] 3 or more EBP, Vested Percentage, Three Years Or More EBP, Vested Percentage, Three Years Or More EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, employer contribution, minimum age EBP, Employer Contribution, Minimum Age EBP, Employer Contribution, Minimum Age EBP, Tax Status [Abstract] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] Cash and cash equivalents EBP, Noninterest-Bearing Cash EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] Benefits paid to participants per the Form 5500 EBP, Form 5500 Caption, Benefit Payment and Payments to Provide Benefits Less: Deemed distributions - defaulted loans at beginning of year Add: Deemed distributions - defaulted loans at beginning of year EBP, Reconciliation to Form 5500, Payment to Participant, Prior Period, Decrease from Deemed Distribution Reconciliation of Financial Statements to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] EBP, Master Trust [Table] EBP, Master Trust [Table] Participant contributions EBP, Participant Contribution, Receivable Document Type Document Type Plan Termination EBP, Plan Termination [Text Block] Entity Central Index Key Entity Central Index Key EBP, asset held for investment, participant loan, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Common collective trusts Common Collective Trust [Member] Contributions received from participants per the Form 5500 EBP, Form 5500 Caption, Contributions, Participants EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] Deductions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] EBP, forfeited nonvested account, decrease from employer contribution EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Notes receivable from participants EBP, Note Receivable from Participant Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Summary of Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name EBP, Subsequent Event [Abstract] Liabilities EBP, Liability [Abstract] Less than 1 EBP, Vested Percentage, Less Than One Year EBP, Vested Percentage, Less Than One Year Schedule H, Line 4a - Schedule of Delinquent Participant Contributions EBP, Schedule of Delinquent Participant Contribution [Text Block] EBP, Schedule of Delinquent Participant Contribution [Table] EBP, Schedule of Delinquent Participant Contribution [Table] Income Tax Status EBP, Tax Status [Text Block] EBP, note receivable from participant, account, maximum borrowing, to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage EBP, risk and uncertainty, concentration of investment at fair value to total investments, percentage EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Total Investments, Percentage EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] Document Information [Table] Document Information [Table] Notes Receivable from Participants EBP, Note Receivable from Participant [Policy Text Block] EBP, employer contribution maximum vesting age EBP, Employer Contribution Maximum Vesting Age EBP, Employer Contribution Maximum Vesting Age EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Contributions Not Corrected EBP, Schedule of Delinquent Participant Contribution, Not Corrected Net assets available for benefits Beginning of year End of year Net assets available for benefits per the financial statements EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] EBP, forfeited nonvested account EBP, Forfeited Nonvested Account EBP, employer contribution, matching percentage EBP, Employer Contribution, Matching Percentage Net assets available for benefits per the Form 5500 EBP, Form 5500 Caption, Net Assets EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]