Deferred Tax Liability, Estimated Increase Due To Exchange Of Partnership Interests

No definition available.

Name:	cnm_DeferredTaxLiabilityEstimatedIncreaseDueToExchangeOfPartnershipInterests
Namespace Prefix:	cnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Tax Benefit Arrangement Payable

+ References

No definition available.

+ Details

Name:	cnm_TaxBenefitArrangementPayable
Namespace Prefix:	cnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Tax Benefit Arrangement Payable Current

+ References

No definition available.

+ Details

Name:	cnm_TaxBenefitArrangementPayableCurrent
Namespace Prefix:	cnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Tax Receivable Agreements, Estimated Deferred Tax Asset Target Per Agreement

+ References

No definition available.

+ Details

Name:	cnm_TaxReceivableAgreementsEstimatedDeferredTaxAssetTargetPerAgreement
Namespace Prefix:	cnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Tax Receivable Agreements, Estimated Tax Liability Per Agreement

+ References

No definition available.

+ Details

Name:	cnm_TaxReceivableAgreementsEstimatedTaxLiabilityPerAgreement
Namespace Prefix:	cnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Tax Receivable Agreements, Payment To Limited Partners Of Realized Company Tax Benefits, Percent

+ References

No definition available.

+ Details

Name:	cnm_TaxReceivableAgreementsPaymentToLimitedPartnersOfRealizedCompanyTaxBenefitsPercent
Namespace Prefix:	cnm_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tax Receivable Agreements, Pro Forma Tax Rate Per Agreement

+ References

No definition available.

+ Details

Name:	cnm_TaxReceivableAgreementsProFormaTaxRatePerAgreement
Namespace Prefix:	cnm_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

+ Details

Name:	us-gaap_EffectiveIncomeTaxRateContinuingOperations
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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

No definition available.

+ Details

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

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=cnm_ContinuingLimitedPartnersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_LimitedPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	Oct. 30, 2022	Jul. 28, 2024	Jul. 30, 2023	Jul. 28, 2024	Jul. 30, 2023	Jul. 26, 2024	Jan. 28, 2024
Income Taxes [Line Items]
Effective tax rate (percent)		25.00%	19.60%	24.80%	19.30%
Percent of Company realized tax benefits payable to Limited Partners pursuant to Tax Receivable Agreements		85.00%		85.00%
Pro forma tax rate per agreements (percent)		25.10%		25.10%
Continuing Limited Partners
Income Taxes [Line Items]
Estimated deferred tax asset target per agreement		$ 135		$ 135
Estimated tax liability per agreement		115		115
Estimated increase in deferred tax liability due to exchange of Partnership Interests	$ 6
Former Limited Partners
Income Taxes [Line Items]
Tax receivable arrangement		720		720			$ 717
Tax benefit arrangement payable, current		$ 19		$ 19
Class A Common Stock
Income Taxes [Line Items]
Closing stock price (in dollars per share)						$ 53.53