Condensed Consolidated Statements of Comprehensive Income - USD ($)	3 Months Ended		9 Months Ended
	Oct. 30, 2022	Oct. 31, 2021	Oct. 30, 2022	Oct. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 178,000,000	$ 109,000,000	$ 497,000,000	$ 146,000,000
Net interest rate swap gain, net of tax (expense) of $(6), $(3), $(12), $(4), respectively	32,000,000	15,000,000	60,000,000	21,000,000
Total comprehensive income	210,000,000	124,000,000	557,000,000	167,000,000
Less: comprehensive income attributable to non-controlling interests	79,000,000	51,000,000	208,000,000	35,000,000
Total comprehensive income attributable to Core & Main, Inc.	$ 131,000,000	$ 73,000,000	$ 349,000,000	$ 132,000,000