Consolidated Statements of Operations - USD ($) $ in Millions		12 Months Ended
		Jan. 30, 2022		Jan. 31, 2021	Feb. 02, 2020
Income Statement [Abstract]
Net sales		$ 5,004		$ 3,642	$ 3,389
Cost of sales		3,724		2,764	2,600
Gross profit		1,280		878	789
Operating expenses:
Selling, general and administrative		717		556	509
Depreciation and amortization		138		137	125
Total operating expenses		855		693	634
Operating income		425		185	155
Interest expense		98		139	113
Loss on debt modification and extinguishment		51		0	0
Income before provision for income taxes		276		46	42
Provision for income taxes		51		9	6
Net income		225		37	36
Less: net income attributable to non-controlling interests	[1]	59
Net income attributable to Core & Main, Inc.		$ 166	[1]	$ 37	$ 36
Earnings per share:
Basic (in dollars per share)	[2]	$ 0.57
Diluted (in dollars per share)	[2]	$ 0.55
Number of shares used in computing EPS
Basic (shares)	[2]	159,188,391
Diluted (shares)	[2]	244,451,678
Net sales [Extensible Enumeration]		Product and Service, Other [Member]		Product and Service, Other [Member]	Product and Service, Other [Member]
Cost of sales [Extensible Enumeration]		Product and Service, Other [Member]		Product and Service, Other [Member]	Product and Service, Other [Member]

[1] For the fiscal year ended January 30, 2022, the net income attributable to Core & Main, Inc. includes net income prior to the Reorganization Transactions of $74 million and net income subsequent to the Reorganization Transactions of $92 million. Refer to the Statements of Changes in Stockholders’ Equity/Partners’ Capital for a summary of net income attributable to Core & Main, Inc. subsequent to the Reorganization Transactions. See Note 1 for a description of the Basis of Presentation of the consolidated financial statements.

[2] Represents basic and diluted earnings per share of Class A common stock and weighted average shares of Class A common stock outstanding for the period from July 23, 2021 through January 30, 2022, which is the period following the Reorganization Transactions described in Note 1. The Company analyzed the calculation of earnings per share for the periods prior to the Reorganization Transactions and determined that it resulted in values that would not be meaningful to the users of the consolidated financial statements. Therefore, there is no earnings per share attributable to Core & Main, Inc. for the periods prior to the Reorganization Transactions on July 22, 2021. Refer to calculation of earnings per share in Note 12.