Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 02, 2025	Oct. 27, 2024	Nov. 02, 2025	Oct. 27, 2024
Income Statement [Abstract]
Net sales	$ 2,062	$ 2,038	$ 6,066	$ 5,743
Cost of sales	1,501	1,495	4,435	4,214
Gross profit	561	543	1,631	1,529
Operating expenses:
Selling, general and administrative	295	274	890	799
Depreciation and amortization	46	46	137	135
Total operating expenses	341	320	1,027	934
Operating income	220	223	604	595
Interest expense	30	36	91	106
Income before provision for income taxes	190	187	513	489
Provision for income taxes	47	47	124	122
Net income	143	140	389	367
Less: net income attributable to non-controlling interests	6	7	18	20
Net income attributable to Core & Main, Inc.	$ 137	$ 133	$ 371	$ 347
Earnings per share:
Basic (in dollars per share)	$ 0.72	$ 0.69	$ 1.95	$ 1.81
Diluted (in dollars per share)	$ 0.72	$ 0.69	$ 1.94	$ 1.79
Basic (shares)	190,214,298	191,538,672	189,973,574	192,173,529
Diluted (shares)	197,905,484	201,165,553	198,302,805	202,146,712