Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 30, 2023	Jul. 31, 2022	Jul. 30, 2023	Jul. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 164	$ 182	$ 297	$ 319
Net interest rate swap gain (loss), net of tax (expense) benefit of $(1), $2, $— and $(6), respectively	8	(9)	0	28
Total comprehensive income	172	173	297	347
Less: comprehensive income attributable to non-controlling interests	56	64	100	129
Total comprehensive income attributable to Core & Main, Inc.	$ 116	$ 109	$ 197	$ 218