Condensed Consolidated Statements of Operations - USD ($) $ in Millions		3 Months Ended				6 Months Ended
	Aug. 01, 2021	Jul. 31, 2022	Aug. 01, 2021		Jul. 26, 2021	Jul. 31, 2022	Aug. 01, 2021		Jul. 26, 2021
Income Statement [Abstract]
Net sales		$ 1,861	$ 1,298			$ 3,459	$ 2,353
Cost of sales		1,360	973			2,537	1,771
Gross profit		501	325			922	582
Operating expenses:
Selling, general and administrative		230	192			436	346
Depreciation and amortization		34	33			69	67
Total operating expenses		264	225			505	413
Operating income		237	100			417	169
Interest expense		17	37			30	73
Loss on debt modification and extinguishment		0	50			0	50
Income before provision for income taxes		220	13			387	46
Provision for income taxes		38	3			68	9
Net income		182	10			319	37
Less: net income (loss) attributable to non-controlling interests		67	(17)			118	(17)
Net income attributable to Core & Main, Inc. (1)	$ (20)	$ 115	$ 27	[1]	$ 47	$ 201	$ 54	[1]	$ 74
Earnings per share:
Basic (in dollars per share)		$ 0.69	$ (0.14)	[2]		$ 1.20	$ (0.14)	[2]
Diluted (in dollars per share)		$ 0.67	$ (0.14)	[2]		$ 1.17	$ (0.14)	[2]
Number of shares used in computing EPS
Basic (shares)		167,876,179	138,978,366	[2]		167,708,034	138,978,366	[2]
Diluted (shares)		246,175,878	138,978,366	[2]		246,160,811	138,978,366	[2]

[1] For the three and six months ended August 1, 2021, the net income (loss) attributable to Core & Main, Inc. includes net income prior to the Reorganization Transactions (as defined in Note 1) of $47 million and $74 million, respectively, and a net loss subsequent to the Reorganization Transactions of $20 million for both periods. Refer to the Statements of Changes in Stockholders’ Equity/Partners’ Capital for a summary of net income (loss) attributable to Core & Main, Inc. prior to and subsequent to the Reorganization Transactions. See Note 1 for a description of the Basis of Presentation of the consolidated financial statements.

[2] For the three and six months ended August 1, 2021, this 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 August 1, 2021, which is the period following the Reorganization Transactions described in Note 1. Refer to calculation of earnings per share in Note 10.