Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 28, 2024	Jul. 30, 2023	Jul. 28, 2024	Jul. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 126	$ 164	$ 227	$ 297
Net interest rate swap (loss) gain, net of tax benefit (expense) of $11, $(1), $5 and $—, respectively	(33)	8	(15)	0
Total comprehensive income	93	172	212	297
Less: comprehensive income attributable to non-controlling interests	5	56	12	100
Total comprehensive income attributable to Core & Main, Inc.	$ 88	$ 116	$ 200	$ 197