Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 30, 2023	Jul. 31, 2022	Jul. 30, 2023	Jul. 31, 2022
Income Statement [Abstract]
Net sales	$ 1,861	$ 1,861	$ 3,435	$ 3,459
Cost of sales	1,360	1,360	2,495	2,537
Gross profit	501	501	940	922
Operating expenses:
Selling, general and administrative	238	230	461	436
Depreciation and amortization	37	34	72	69
Total operating expenses	275	264	533	505
Operating income	226	237	407	417
Interest expense	22	17	39	30
Income before provision for income taxes	204	220	368	387
Provision for income taxes	40	38	71	68
Net income	164	182	297	319
Less: net income attributable to non-controlling interests	54	67	101	118
Net income attributable to Core & Main, Inc.	$ 110	$ 115	$ 196	$ 201
Earnings per share:
Basic (in dollars per share)	$ 0.66	$ 0.69	$ 1.16	$ 1.20
Diluted (in dollars per share)	$ 0.66	$ 0.67	$ 1.15	$ 1.17
Basic (shares)	167,312,292	167,876,179	169,474,741	167,708,034
Diluted (shares)	228,983,281	246,175,878	236,375,917	246,160,811