Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 03, 2025	Jul. 28, 2024	Aug. 03, 2025	Jul. 28, 2024
Income Statement [Abstract]
Net sales	$ 2,093	$ 1,964	$ 4,004	$ 3,705
Cost of sales	1,533	1,446	2,934	2,719
Gross profit	560	518	1,070	986
Operating expenses:
Selling, general and administrative	302	268	595	525
Depreciation and amortization	45	46	91	89
Total operating expenses	347	314	686	614
Operating income	213	204	384	372
Interest expense	31	36	61	70
Income before provision for income taxes	182	168	323	302
Provision for income taxes	41	42	77	75
Net income	141	126	246	227
Less: net income attributable to non-controlling interests	7	7	12	13
Net income attributable to Core & Main, Inc.	$ 134	$ 119	$ 234	$ 214
Earnings per share:
Basic (in dollars per share)	$ 0.71	$ 0.62	$ 1.23	$ 1.11
Diluted (in dollars per share)	$ 0.70	$ 0.61	$ 1.22	$ 1.11
Basic (shares)	189,904,002	192,797,961	189,855,388	192,495,255
Diluted (shares)	198,302,610	202,667,354	198,503,146	202,640,993