Accounts Receivable, Amount Authorized For Sale

No definition available.

Name:	msm_AccountsReceivableAmountAuthorizedForSale
Namespace Prefix:	msm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Accounts Receivable, Collateral, Unsold Receivables, Amount

+ References

No definition available.

+ Details

Name:	msm_AccountsReceivableCollateralUnsoldReceivablesAmount
Namespace Prefix:	msm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Accounts Receivable, Sales Transactions Fees

+ References

No definition available.

+ Details

Name:	msm_AccountsReceivableSalesTransactionsFees
Namespace Prefix:	msm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

Name:	us-gaap_AccountsReceivableSale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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/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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow associated with the proceeds from sale and collection of receivables during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-12

+ Details

Name:	us-gaap_ProceedsFromSaleAndCollectionOfReceivables
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_CounterpartyNameAxis=msm_PurchasersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=msm_ReceivablesPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Accounts Receivable - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 03, 2023	Jun. 03, 2023	Dec. 19, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable, amount authorized for sale			$ 300,000
Accounts receivable, sales transactions fees	$ 4,317	$ 7,640
Purchasers
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable, sale		300,000
Accounts receivable, collateral, unsold receivables, amount	$ 350,562	350,562
Receivables Purchase Agreement
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable, sale		817,398
Proceeds from sale and collection of receivables		$ 517,398