Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Aug. 01, 2021	Jul. 31, 2022	Aug. 01, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 182	$ 10	$ 319	$ 37
Net interest rate swap (loss) gain, net of tax benefit (expense) of $2, $(1), $(6) $(1), respectively	(9)	4	28	6
Total comprehensive income	173	14	347	43
Less: comprehensive income (loss) attributable to non-controlling interests	64	(16)	129	(16)
Total comprehensive income attributable to Core & Main, Inc.	$ 109	$ 30	$ 218	$ 59