Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 28, 2024	Jul. 30, 2023	Jul. 28, 2024	Jul. 30, 2023
Income Statement [Abstract]
Net sales	$ 1,964	$ 1,861	$ 3,705	$ 3,435
Cost of sales	1,446	1,360	2,719	2,495
Gross profit	518	501	986	940
Operating expenses:
Selling, general and administrative	268	238	525	461
Depreciation and amortization	46	37	89	72
Total operating expenses	314	275	614	533
Operating income	204	226	372	407
Interest expense	36	22	70	39
Income before provision for income taxes	168	204	302	368
Provision for income taxes	42	40	75	71
Net income	126	164	227	297
Less: net income attributable to non-controlling interests	7	54	13	101
Net income attributable to Core & Main, Inc.	$ 119	$ 110	$ 214	$ 196
Earnings per share:
Basic (in dollars per share)	$ 0.62	$ 0.66	$ 1.11	$ 1.16
Diluted (in dollars per share)	$ 0.61	$ 0.66	$ 1.11	$ 1.15
Basic (shares)	192,797,961	167,312,292	192,495,255	169,474,741
Diluted (shares)	202,667,354	228,983,281	202,640,993	236,375,917