Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 29, 2023	Oct. 30, 2022	Oct. 29, 2023	Oct. 30, 2022
Income Statement [Abstract]
Net sales	$ 1,827	$ 1,818	$ 5,262	$ 5,277
Cost of sales	1,333	1,318	3,828	3,855
Gross profit	494	500	1,434	1,422
Operating expenses:
Selling, general and administrative	240	231	701	667
Depreciation and amortization	37	35	109	104
Total operating expenses	277	266	810	771
Operating income	217	234	624	651
Interest expense	20	16	59	46
Income before provision for income taxes	197	218	565	605
Provision for income taxes	39	40	110	108
Net income	158	178	455	497
Less: net income attributable to non-controlling interests	46	67	147	185
Net income attributable to Core & Main, Inc.	$ 112	$ 111	$ 308	$ 312
Earnings per share:
Basic (in dollars per share)	$ 0.65	$ 0.65	$ 1.81	$ 1.85
Diluted (in dollars per share)	$ 0.65	$ 0.65	$ 1.80	$ 1.82
Basic (shares)	170,999,291	170,027,629	169,989,859	168,485,011
Diluted (shares)	224,686,413	246,262,224	232,485,740	246,198,822