Basis of Presentation (Policies)	9 Months Ended
Jun. 01, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting, Policy	Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the rules and regulations of the SEC. The Company, however, believes that the disclosures contained in this Report comply with the requirements of Section 13(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), for a Quarterly Report on Form 10-Q and are adequate to make the information presented not misleading.
Fiscal Year	Fiscal Year The Company operates on a 52/53-week fiscal year ending on the Saturday closest to August 31st of each year. References to “fiscal year 2024” refer to the period from September 3, 2023 to August 31, 2024, which is a 52-week fiscal year. References to “fiscal year 2023” refer to the period from September 4, 2022 to September 2, 2023, which is a 52-week fiscal year. The fiscal quarters ended June 1, 2024 and June 3, 2023 refer to the thirteen weeks ended as of those dates.
Principles of Consolidation	Principles of Consolidation The unaudited Condensed Consolidated Financial Statements include the accounts of MSC Industrial Direct Co., Inc., its wholly owned subsidiaries and entities in which it maintains a controlling financial interest. All significant intercompany balances and transactions have been eliminated in consolidation.
Reclassifications	Reclassifications Reclassifications were made to the unaudited Condensed Consolidated Statement of Cash Flows for the thirty-nine weeks ended June 3, 2023 to conform with the current year presentation.
Accounting Standards Not Yet Adopted	Accounting Standards Not Yet Adopted In March 2024, the SEC issued its final rule on the enhancement and standardization of climate-related disclosures for investors. These wide-ranging disclosures require annual disclosure of material greenhouse gas emissions as well as disclosure of governance, risk management and strategy related to material climate-related risks. Within the notes to financial statements, the final rule requires disclosure of expenditures recognized, subject to certain thresholds, attributable to severe weather. Outside of the financial statements, the final rule requires qualitative and quantitative disclosures about material Scope 1 and Scope 2 greenhouse gas emissions. Also required is disclosure of the risk management process and the oversight practices of the Board of Directors and management related to climate-related risks. The final rule follows a compliance phase-in timeline, with the first requirements required to be adopted for the Company’s fiscal year 2026, followed in later years by greenhouse gas-related requirements. In April 2024, the SEC voluntarily stayed implementation of the final rule pending completion of judicial review of consolidated challenges to the final rule by the Court of Appeals for the Eighth Circuit. The Company is currently evaluating the final rule to determine the impact on its consolidated financial statements and disclosures. In December 2023, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2023-09, Income Taxes (Topic 740): Improvement to Income Tax Disclosures to enhance the transparency and decision usefulness of income tax disclosures. The ASU primarily enhances and expands both the income tax rate reconciliation disclosure and the income taxes paid disclosure. The ASU is effective for annual periods beginning after December 15, 2024 on a prospective basis. Early adoption is permitted. The Company is currently evaluating the standard to determine the impact of adoption on its consolidated financial statements and disclosures. In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The ASU requires entities, including those with a single reporting segment, to disclose significant segment expenses that are regularly provided to the chief operating decision maker, among other provisions. The ASU is effective for fiscal year periods beginning after December 15, 2023, including subsequent interim periods, with early adoption permitted, and requires retrospective application to all prior periods presented in the financial statements. The Company is currently evaluating the standard to determine the impact of adoption on its consolidated financial statements and disclosures.

Basis of Presentation (Policies)

9 Months Ended

Jun. 01, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the rules and regulations of the SEC. The Company, however, believes that the disclosures contained in this Report comply with the requirements of Section 13(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), for a Quarterly Report on Form 10-Q and are adequate to make the information presented not misleading.

Fiscal Year

The Company operates on a 52/53-week fiscal year ending on the Saturday closest to August 31st of each year. References to “fiscal year 2024” refer to the period from September 3, 2023 to August 31, 2024, which is a 52-week fiscal year. References to “fiscal year 2023” refer to the period from September 4, 2022 to September 2, 2023, which is a 52-week fiscal year. The fiscal quarters ended June 1, 2024 and June 3, 2023 refer to the thirteen weeks ended as of those dates.

Principles of Consolidation

The unaudited Condensed Consolidated Financial Statements include the accounts of MSC Industrial Direct Co., Inc., its wholly owned subsidiaries and entities in which it maintains a controlling financial interest. All significant intercompany balances and transactions have been eliminated in consolidation.

Reclassifications

Reclassifications were made to the unaudited Condensed Consolidated Statement of Cash Flows for the thirty-nine weeks ended June 3, 2023 to conform with the current year presentation.

Accounting Standards Not Yet Adopted

In March 2024, the SEC issued its final rule on the enhancement and standardization of climate-related disclosures for investors. These wide-ranging disclosures require annual disclosure of material greenhouse gas emissions as well as disclosure of governance, risk management and strategy related to material climate-related risks. Within the notes to financial statements, the final rule requires disclosure of expenditures recognized, subject to certain thresholds, attributable to severe weather. Outside of the financial statements, the final rule requires qualitative and quantitative disclosures about material Scope 1 and Scope 2 greenhouse gas emissions. Also required is disclosure of the risk management process and the oversight practices of the Board of Directors and management related to climate-related risks. The final rule follows a compliance phase-in timeline, with the first requirements required to be adopted for the Company’s fiscal year 2026, followed in later years by greenhouse gas-related requirements. In April 2024, the SEC voluntarily stayed implementation of the final rule pending completion of judicial review of consolidated challenges to the final rule by the Court of Appeals

for the Eighth Circuit. The Company is currently evaluating the final rule to determine the impact on its consolidated financial statements and disclosures.

In December 2023, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2023-09, Income Taxes (Topic 740): Improvement to Income Tax Disclosures to enhance the transparency and decision usefulness of income tax disclosures. The ASU primarily enhances and expands both the income tax rate reconciliation disclosure and the income taxes paid disclosure. The ASU is effective for annual periods beginning after December 15, 2024 on a prospective basis. Early adoption is permitted. The Company is currently evaluating the standard to determine the impact of adoption on its consolidated financial statements and disclosures.

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The ASU requires entities, including those with a single reporting segment, to disclose significant segment expenses that are regularly provided to the chief operating decision maker, among other provisions. The ASU is effective for fiscal year periods beginning after December 15, 2023, including subsequent interim periods, with early adoption permitted, and requires retrospective application to all prior periods presented in the financial statements. The Company is currently evaluating the standard to determine the impact of adoption on its consolidated financial statements and disclosures.