Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Apr. 28, 2024	Apr. 30, 2023
Income Statement [Abstract]
Net sales	$ 1,741	$ 1,574
Cost of sales	1,273	1,135
Gross profit	468	439
Operating expenses:
Selling, general and administrative	257	223
Depreciation and amortization	43	35
Total operating expenses	300	258
Operating income	168	181
Interest expense	34	17
Income before provision for income taxes	134	164
Provision for income taxes	33	31
Net income	101	133
Less: net income attributable to non-controlling interests	6	47
Net income attributable to Core & Main, Inc.	$ 95	$ 86
Earnings per share:
Basic (in dollars per share)	$ 0.49	$ 0.50
Diluted (in dollars per share)	$ 0.49	$ 0.50
Basic (shares)	192,194,061	171,597,317
Diluted (shares)	202,615,824	243,716,764