Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Total	Holdings Management Feeder	Additional Paid In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Non-Controlling Interests	Class A Common Stock	Class A Common Stock Common Stock	Class B Common Stock Common Stock
Beginning balance (in shares) at Jan. 28, 2024								191,663,608	9,630,186
Beginning balance at Jan. 28, 2024	$ 1,524,000,000		$ 1,214,000,000	$ 189,000,000	$ 46,000,000	$ 73,000,000		$ 2,000,000	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	101,000,000			95,000,000		6,000,000
Equity-based compensation	3,000,000		3,000,000
Net comprehensive loss, net of tax	18,000,000				17,000,000	1,000,000
Distributions to non-controlling interest holders	(4,000,000)					(2,000,000)
Exchange of Partnership Interests and Class B Shares for Class A Shares (in shares)								812,612	816,654
Exchange of Partnership Interests and Class B Shares for Class A Shares	0		4,000,000			(4,000,000)
Establishment/adjustment of deferred tax asset associated with Core & Main investment in Core & Main Holdings, LP	13,000,000		13,000,000
Establishment of Tax receivable agreement liabilities	(10,000,000)		(10,000,000)
Activity under equity-based compensation plans, net of tax withholdings (in shares)								158,097
Activity under equity-based compensation plans, net of tax withholdings	(1,000,000)		(1,000,000)
Ending balance (in shares) at Apr. 28, 2024								192,634,317	8,813,532
Ending balance at Apr. 28, 2024	1,644,000,000		1,221,000,000	284,000,000	63,000,000	74,000,000		$ 2,000,000	$ 0
Beginning balance (in shares) at Feb. 02, 2025								189,815,899	7,936,061
Beginning balance at Feb. 02, 2025	1,774,000,000		1,220,000,000	449,000,000	27,000,000	76,000,000		$ 2,000,000	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	105,000,000			100,000,000		5,000,000
Equity-based compensation	5,000,000		5,000,000
Net comprehensive loss, net of tax	(21,000,000)				(20,000,000)	(1,000,000)
Distributions to non-controlling interest holders	(2,000,000)	$ (2,000,000)				(2,000,000)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest (in shares)							(837,268)	(837,268)
Repurchase and Retirement of equity interests	(39,000,000)		(5,000,000)	(34,000,000)
Exchange of Partnership Interests and Class B Shares for Class A Shares (in shares)								279,352	286,571
Exchange of Partnership Interests and Class B Shares for Class A Shares	0		1,000,000			(1,000,000)
Establishment/adjustment of deferred tax asset associated with Core & Main investment in Core & Main Holdings, LP	4,000,000		4,000,000
Establishment of Tax receivable agreement liabilities	(4,000,000)		(4,000,000)
Share issuances under equity-based compensation plans, net of tax withholdings (shares)								193,286
Activity under equity-based compensation plans, net of tax withholdings	(1,000,000)		(1,000,000)
Ending balance (in shares) at May. 04, 2025								189,451,269	7,649,490
Ending balance at May. 04, 2025	$ 1,821,000,000		$ 1,220,000,000	$ 515,000,000	$ 7,000,000	$ 77,000,000		$ 2,000,000	$ 0