v3.25.2

Cover - shares	6 Months Ended
Cover - shares	Aug. 03, 2025	Sep. 05, 2025
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Aug. 03, 2025
Document Transition Report	false
Entity File Number	001-40650
Entity Registrant Name	Core & Main, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	86-3149194
Entity Address, Address Line One	1830 Craig Park Court
Entity Address, City or Town	St. Louis
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63146
City Area Code	314
Local Phone Number	432-4700
Title of 12(b) Security	Class A common stock, par value $0.01 per share
Trading Symbol	CNM
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001856525
Current Fiscal Year End Date	--02-01
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q2
Amendment Flag	false
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		190,688,721
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		6,736,324

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A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

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Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.

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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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Local phone number for entity.

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Title of a 12(b) registered security.

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Core & Main, Inc. 10-Q