Accounts receivable, sales transactions fees Accounts Receivable, Sales Transactions Fees Accounts Receivable, Sales Transactions Fees Accounts receivable, sale Receivables sold under the RPA Accounts Receivable, Sale Range [Domain] Statistical Measurement [Domain] Net proceeds from sale of property Proceeds from Sale, Property, Held-for-Sale Other Other Customers [Member] Other Customers [Member] Schedule of Performance Share Unit Activity Schedule of Nonvested Performance-Based Units Activity [Table Text Block] Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Additional Paid-in Capital Additional Paid-in Capital [Member] Tabular List, Table Tabular List [Table Text Block] Net income per share: Earnings Per Share, Basic [Abstract] Accounting Standards Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Type of Restructuring [Domain] Type of Restructuring [Domain] Borrowings under financing obligations Proceeds from Other Debt Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic (in usd per share) Basic (in usd per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Reportable Segment Reportable Segment [Member] Reportable Segment Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Revenue Revenue from Contract with Customer [Text Block] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Uncommitted Credit Facilities Short-Term Debt Performance obligation Revenue, Remaining Performance Obligation, Amount Incremental Dividend Rights, Restricted Stock Units Incremental Dividend Rights Restricted Stock Units [Member] Incremental Dividend Rights, Restricted Stock Units [Member] Adjustment to Compensation, Amount Adjustment to Compensation Amount Concentration risk, percentage Concentration Risk, Percentage Other assets Increase (Decrease) in Other Operating Assets Principles of Consolidation Consolidation, Policy [Policy Text Block] Stock-based compensation Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Accrual for exercise tax on share repurchase Share Repurchase Program, Excise Tax Cash paid for income taxes Income Taxes Paid Property, plant and equipment asset impairment Asset Impairment Charges Regular cash dividends declared on Class A Common Stock Dividends, Common Stock, Cash Total MSC Industrial shareholders’ equity Equity, Attributable to Parent Other comprehensive income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] Line of credit facility, maximum amount outstanding during period Line of Credit Facility, Maximum Amount Outstanding During Period Current Assets: Assets, Current [Abstract] Total liabilities and shareholders’ equity Liabilities and Equity Line of credit facility, interest rate at period end (in percentage) Line of Credit Facility, Interest Rate at Period End Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Stock issued during period, shares, employee stock ownership plan (in shares) Stock Issued During Period, Shares, Employee Stock Ownership Plan LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Amended Uncommitted Credit Facilities Amended Uncommitted Facilities [Member] Amended Uncommitted Facilities [Member] Public Sector Customers Public Sector Customers [Member] Public Sector Customers Maximum Maximum [Member] Stock-based compensation expense, net Share-Based Payment Arrangement, Expense, after Tax Less: Net loss attributable to noncontrolling interest Net loss Net Income (Loss) Attributable to Noncontrolling Interest Maximum number of shares that can be repurchased (in shares) Share Repurchase Program, Remaining Authorized, Number of Shares Committed Bank Facility Committed Credit Facility [Member] Committed Credit Facility [Member] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Loss on disposal of property, plant and equipment Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Treasury Stock Treasury Stock, Common [Member] Operating Margin Operating Margin Operating Margin Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Share Repurchase Program [Line Items] Share Repurchase Program [Line Items] Manufacturing Light Manufacturing Light [Member] Manufacturing Light [Member] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Income before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Purchase of noncontrolling interest Payments for Repurchase of Redeemable Noncontrolling Interest Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Less: unamortized debt issuance costs Debt Issuance Costs, Gross Comprehensive income attributable to MSC Industrial Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Beginning balance Ending balance Restructuring Reserve Letter of Credit Letter of Credit [Member] Current portion of operating lease liabilities Operating Lease, Liability, Current Document Fiscal Period Focus Document Fiscal Period Focus Core and Other Customers Core and Other Customers [Member] Core and Other Customers Accrued sales returns Accrued sales returns Accrued sales returns Award Timing Method Award Timing Method [Text Block] Award Type [Axis] Award Type [Axis] Total assets Assets Schedule of Non-Vested Restricted Stock Unit Award Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Trading Symbol Trading Symbol Vested (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Geographical [Domain] Geographical [Domain] Entity Address, City or Town Entity Address, City or Town Cash Flows from Operating Activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Other segment items Segment Reporting, Other Segment Item, Amount Effect of foreign exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Concentration Risk Type [Axis] Concentration Risk Type [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Restricted stock units Restricted Stock Units (RSUs) [Member] Associate severance and separation costs Severance Costs Long-Term Note Payable Notes Payable, Noncurrent Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Restructuring and other costs Restructuring Costs Entity Emerging Growth Company Entity Emerging Growth Company Treasury stock, shares repurchased to satisfy tax withholding obligation (in shares) Treasury Stock, Shares Withheld For Tax Withholding Obligation Treasury Stock, Shares Withheld For Tax Withholding Obligation Dividends declared per common share (in usd per share) Dividends declared per common share (in usd per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Payments under credit facilities Repayments of Lines of Credit Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Provision for credit losses Accounts Receivable, Credit Loss Expense (Reversal) PEO PEO [Member] Accounts Receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Associate severance and separation costs Employee Severance [Member] Interest income Investment Income, Interest United States UNITED STATES Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Number of credit facilities Number Of Credit Facilities Number Of Credit Facilities Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Retained Earnings Retained Earnings [Member] Commercial Services Commercial [Member] Commercial [Member] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-Based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash and cash equivalents—beginning of period Cash and cash equivalents—end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Provision for income taxes Income Tax Expense (Benefit) Senior Notes, Series B, Due July 28, 2026 Senior Notes Series B Senior Notes Two [Member] Senior Notes Two [Member] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Identifiable intangibles, net Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Customer Concentration Risk Customer Concentration Risk [Member] Financing Arrangement Financing Arrangement [Member] Financing Arrangement Total Shareholders’ Equity Attributable to MSC Industrial Parent [Member] Net income Net income, as reported Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Restructuring and Other Costs Restructuring and Related Activities Disclosure [Text Block] Non-cash operating lease cost Operating Lease, Right-of-Use Asset, Periodic Reduction Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Proceeds from exercise of Class A Common Stock options Proceeds from Stock Options Exercised City Area Code City Area Code Prepaid sales incentives Revenue recognition, Prepaid sales incentives Revenue recognition, Prepaid sales incentives Cash used in acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued expenses and other current liabilities Accrued Liabilities, Current Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Cash Flows from Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Credit facility, expiration term (in years) Debt Instrument, Term Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Subsequent Event Subsequent Event [Member] Goodwill Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Retail/Wholesale Retail Wholesale [Member] Retail/Wholesale [Member] Equity Components [Axis] Equity Components [Axis] Financing obligations, current Financing obligations, current Financing obligations, current Fair value remeasurement of non-financial liabilities on non-recurring basis Liabilities, Fair Value Adjustment Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Payments of regular cash dividends Payments of regular cash dividends Payments of Ordinary Dividends Supplemental Disclosure of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Other Performance Measure, Amount Other Performance Measure, Amount Entity Address, State or Province Entity Address, State or Province Dividend payable amount Dividends National Account Customers National Account Customers [Member] National Account Customers Amended Revolving Credit Facility Amended Revolving Credit Facility [Member] Amended Revolving Credit Facility [Member] Total current liabilities Liabilities, Current Individual: Individual [Axis] Uncommitted Bank Facilities Uncommitted Credit Facility [Member] Uncommitted Credit Facility [Member] Accounts receivable, collateral, unsold receivables, amount Accounts Receivable, Collateral, Unsold Receivables, Amount Accounts Receivable, Collateral, Unsold Receivables, Amount Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Operating lease assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Effective tax rate (in percentage) Effective Income Tax Rate Reconciliation, Percent Entity Interactive Data Current Entity Interactive Data Current Amortization of cloud computing arrangements Hosting Arrangement, Service Contract, Implementation Cost, Expense, Amortization Unrecognized share-based compensation weighted average period (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Legal Proceedings Legal Matters and Contingencies [Text Block] North America North America [Member] Segment Reporting Segment Reporting Disclosure [Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Current portion of debt including obligations under finance leases Less: current portion Long-Term Debt and Lease Obligation, Current Total debt, including obligations under finance leases Debt and Lease Obligation Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Number of shares authorized for repurchase (in shares) Share Repurchase Program, Authorized, Number of Shares Proceeds from sale and collection of receivables Cash collected on sold receivables under the RPA Proceeds from Sale and Collection of Receivables Depreciation and amortization Depreciation, Depletion and Amortization Financing arrangements Financing Obligations Interest free short-term borrowings. Other assets Other Assets, Noncurrent Customer [Domain] Customer [Domain] Entity Central Index Key Entity Central Index Key PEO Name PEO Name Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Other foreign countries Other Foreign Countries [Member] Other Foreign Countries Obligations under finance leases Finance Lease, Liability Arrangement Duration Trading Arrangement Duration Increase in amount authorized for sale Accounts Receivable, Increase (Decrease) In Amount Authorized For Sale Accounts Receivable, Increase (Decrease) In Amount Authorized For Sale Segments [Axis] Segments [Axis] Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Comprehensive income attributable to noncontrolling interest: Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest [Abstract] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Class of Stock [Domain] Class of Stock [Domain] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Subsequent Event Type [Axis] Subsequent Event Type [Axis] Stock-Based Compensation Share-Based Payment Arrangement [Text Block] ASSETS Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Debt Instrument [Axis] Debt Instrument [Axis] Forfeited (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Fair Value Fair Value Disclosures [Text Block] Credit Facility [Domain] Credit Facility [Domain] MSC Industrial Shareholders’ Equity: Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Share Repurchase Plan Share Repurchase Plan [Member] Share Repurchase Plan Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Repurchase of Class A Common Stock, including excise tax Treasury Stock, Value, Acquired, Cost Method Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Interest rate (in percentage) Debt Instrument, Interest Rate, Stated Percentage Manufacturing Heavy Manufacturing Heavy [Member] Manufacturing Heavy [Member] Less: allowance for credit losses Less: allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Noncurrent operating lease liabilities Operating Lease, Liability, Noncurrent Unrecognized tax benefits, period increase (decrease) Unrecognized Tax Benefits, Period Increase (Decrease) Available increase in amount borrowed Available Increase In Aggregate Amount Borrowed Available increase in aggregate amount borrowed Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Payroll and payroll-related costs Labor and Related Expense Total adjustments Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unrecognized share-based compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Deferred income taxes and tax uncertainties Deferred Income Taxes and Other Tax Liabilities, Noncurrent Document Quarterly Report Document Quarterly Report Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Number of operating segments Number of Operating Segments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Schedule of Debt Schedule of Debt [Table Text Block] Granted (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Purchasers Purchasers [Member] Purchasers Incremental Dividend Rights Performance Stock Units Incremental Dividend Rights Performance Stock Units [Member] Incremental Dividend Rights, Performance Stock Units [Member] Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Schedule of Restructuring Charges Restructuring and Related Costs [Table Text Block] Foreign currency translation adjustments Foreign Currency Translation Adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest Other, net Proceeds from (Payment for) Other Financing Activity Name Trading Arrangement, Individual Name Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Award Type [Domain] Noncontrolling interest Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Vested shares, percentage of target award amount (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Vested Shares, Percentage of Target Award Amount Share-based Compensation Arrangement by Share-based Payment Award, Vested Shares, Percentage of Target Award Amount Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Purchase of Noncontrolling Interest Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Canada CANADA Compensation Amount Outstanding Recovery Compensation Amount Debt instrument, face amount Debt Instrument, Face Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Share Repurchase Program [Axis] Share Repurchase Program [Axis] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Payments and other adjustments Payments for Restructuring Receivables Purchase Agreement Receivables Purchase Agreement [Member] Receivables Purchase Agreement Beginning balance (in usd per share) Ending balance (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Restructuring Type [Axis] Restructuring Type [Axis] Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Non-cash changes in fair value of estimated contingent consideration Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Class A treasury stock, at cost, 1,328,367 and 1,296,625 shares, respectively Treasury Stock, Value Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Long-term debt including obligations under finance leases Total long-term debt, including obligations under finance leases Long-Term Debt and Lease Obligation Senior Notes Due April 18, 2027 Senior Notes Due April182027 [Member] Senior Notes Due April182027 Segments [Domain] Segments [Domain] Fair value remeasurement of non-financial assets on non-recurring basis Assets, Fair Value Adjustment Performance share units Performance Shares [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Inventories Increase (Decrease) in Inventories Inventories Inventory, Net Minimum Minimum [Member] Senior notes, Due March 5, 2027 Senior Notes Due March52027 [Member] Senior notes, due March 5, 2027 [Member] Company Selected Measure Name Company Selected Measure Name Senior Notes Senior Notes [Member] Payment term Revenue, Performance Obligation, Payment Terms Revenue, Performance Obligation, Payment Terms Debt Debt Disclosure [Text Block] Preferred Stock; $0.001 par value; 5,000,000 shares authorized; none issued and outstanding Preferred Stock, Value, Issued Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Proceeds from sale of Class A Common Stock in connection with Associate Stock Purchase Plan Proceeds from Stock Plans Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Class A Common Stock; $0.001 par value; 100,000,000 shares authorized; 57,161,476 and 57,086,377 shares issued, respectively Common Stock, Value, Issued Diluted (in shares) Weighted-average shares outstanding for diluted net income per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Commitments and Contingencies Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Noncontrolling Interest Noncontrolling Interest [Member] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Underlying Securities Award Underlying Securities Amount Accounts receivable, amount authorized for sale Accounts Receivable, Amount Authorized For Sale Accounts Receivable, Amount Authorized For Sale Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Income Taxes Income Tax Disclosure [Text Block] Borrowings under credit facilities Proceeds from lines of credit Proceeds from Lines of Credit Class A Common Stock Common Class A [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Operating lease liabilities Increase (Decrease) in Operating Lease Liability Total shareholders’ equity Beginning Balance Ending Balance Equity, Including Portion Attributable to Noncontrolling Interest Additions Consulting and severance costs Consulting and severance costs Document Type Document Type Net Income per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Additional paid-in capital Additional Paid in Capital Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Revenue from Contract with Customer Benchmark Revenue from Contract with Customer Benchmark [Member] Net sales Revenue from Contract with Customer, Excluding Assessed Tax Debt Instruments [Abstract] All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Legal Proceedings [Abstract] Legal Proceedings [Abstract] Legal Proceedings [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Expenditures for property, plant and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name Consulting-related costs Consulting Related Costs [Member] Consulting Related Costs [Member] Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Equity award acceleration costs associated with severance Share-Based Payment Arrangement, Accelerated Cost Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Contract with customer, refund liability Contract with Customer, Refund Liability Current Liabilities: Liabilities, Current [Abstract] Geographical [Axis] Geographical [Axis] Operating expenses Operating Expenses Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Amended Revolving Credit Facility Outstanding balance Long-Term Line of Credit Diluted (in usd per share) Diluted (in usd per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Accounts receivable, net of allowance for credit losses of $20,933 and $22,365, respectively Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security Treasury stock, shares (in shares) Treasury Stock, Common, Shares Net income per common share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Total other expense Nonoperating Income (Expense) Consulting-related costs Restructuring Charges, Consulting Related Costs Restructuring Charges, Consulting Related Costs Gross profit Gross Profit Repurchase and retirement of Class A Common Stock, including excise tax Stock Repurchased and Retired During Period, Value Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Award Timing Disclosures [Line Items] Dividend equivalents declared, net of cancellations Dividend, Share-Based Payment Arrangement Shareholders' Equity Equity [Text Block] Fiscal Year Fiscal Period, Policy [Policy Text Block] Net income attributable to MSC Industrial Net loss Net income attributable to MSC Industrial, as reported Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Shareholders’ Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Property, plant and equipment, net Property, Plant and Equipment, Net Private Placement Debt Private Placement Debt [Member] Private Placement Debt [Member] Total Restructuring and other costs Restructuring Charges Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Numerator: Net Income (Loss) Attributable to Parent [Abstract] Geographic Concentration Risk Geographic Concentration Risk [Member] Repurchases of Class A Common Stock Repurchases of common stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Contract assets Contract with Customer, Asset, after Allowance for Credit Loss Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Entity Current Reporting Status Entity Current Reporting Status Receivables [Abstract] Customer [Axis] Customer [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Income from operations Operating Income (Loss) Retained earnings Retained Earnings (Accumulated Deficit) Schedule of Stock-Based Compensation Expense Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Repayment of loan facility Repayments of Debt Finance lease, liability, current Finance Lease, Liability, Current Class of Stock [Axis] Class of Stock [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Subsequent Event Type [Domain] Subsequent Event Type [Domain] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Unamortized debt issuance costs, current Debt Issuance Costs, Gross, Current Schedule of Accounts, Notes, Loans and Financing Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Weighted-Average Grant Date Fair Value per Share Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Statement [Table] Statement [Table] Other expense, net Other Nonoperating Income (Expense) Expenditures for cloud computing arrangements Payments For Cloud Computing Arrangements Payments For Cloud Computing Arrangements Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Cash Flows from Financing Activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Contract liabilities Contract with Customer, Liability Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Potentially dilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted-average shares used in computing net income per common share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Deferred income tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Termination Date Trading Arrangement Termination Date Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Public Sector Public Sector [Member] Public Sector Basic (in shares) Weighted-average shares outstanding for basic net income per share (in shares) Weighted Average Number of Shares Outstanding, Basic Cost of goods sold Cost of Product and Service Sold Schedule of Computation of Basic and Diluted Net Income per Common Share Under Treasury Stock Method Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Share Repurchase Program [Table] Share Repurchase Program [Table] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Other income (expense): Nonoperating Income (Expense) [Abstract] Entity Tax Identification Number Entity Tax Identification Number Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Stock repurchased during period, including held in treasury (in shares) Stock Repurchased During Period, Including Treasury Stock, Shares Stock Repurchased During Period, Including Treasury Stock, Shares Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares, issued (in shares) Common Stock, Shares, Issued Schedule of Activity and Amounts Outstanding Under the RPA Loans, Notes, Trade and Other Receivables, Sales [Table Text Block] Loans, Notes, Trade and Other Receivables, Sales Interest expense Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Foreign currency translation adjustments Foreign Currency Translation Adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Total liabilities Liabilities Credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Associate Incentive Plans Shares Granted, Value, Share-Based Payment Arrangement, after Forfeiture Freight expense Freight Expense Freight Expense Statement [Line Items] Statement [Line Items] Schedule of Restructuring Related Liabilities Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Counterparty Name [Axis] Counterparty Name [Axis] Common Stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Effect of dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Mexico MEXICO