Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 27, 2024	Oct. 29, 2023	Oct. 27, 2024	Oct. 29, 2023
Income Statement [Abstract]
Net sales	$ 2,038	$ 1,827	$ 5,743	$ 5,262
Cost of sales	1,495	1,333	4,214	3,828
Gross profit	543	494	1,529	1,434
Operating expenses:
Selling, general and administrative	274	240	799	701
Depreciation and amortization	46	37	135	109
Total operating expenses	320	277	934	810
Operating income	223	217	595	624
Interest expense	36	20	106	59
Income before provision for income taxes	187	197	489	565
Provision for income taxes	47	39	122	110
Net income	140	158	367	455
Less: net income attributable to non-controlling interests	7	46	20	147
Net income attributable to Core & Main, Inc.	$ 133	$ 112	$ 347	$ 308
Earnings per share:
Basic (in dollars per share)	$ 0.69	$ 0.65	$ 1.81	$ 1.81
Diluted (in dollars per share)	$ 0.69	$ 0.65	$ 1.79	$ 1.80
Basic (shares)	191,538,672	170,999,291	192,173,529	169,989,859
Diluted (shares)	201,165,553	224,686,413	202,146,712	232,485,740