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Accounts Receivable - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 01, 2025 | Mar. 02, 2024 | Mar. 01, 2025 | Mar. 02, 2024 | Aug. 31, 2024 | Dec. 19, 2022
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Accounts receivable, amount authorized for sale |  |  |  |  |  | $ 300,000
Accounts receivable, sales transactions fees | $ 3,863 | $ 4,616 | $ 8,065 | $ 9,227 |  |
Purchasers |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Accounts receivable, sale |  |  | 300 |  |  |
Accounts receivable, collateral, unsold receivables, amount | $ 337,167 |  | $ 337,167 |  | $ 349,743 |

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- Definition Accounts Receivable, Amount Authorized For Sale + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Accounts Receivable, Collateral, Unsold Receivables, Amount + References No definition available. + Details
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Namespace Prefix: | msm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Accounts Receivable, Sales Transactions Fees + References No definition available. + Details
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Namespace Prefix: | msm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of decrease from sale of accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-11 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |