Condensed Consolidated Statements of Changes in Partners' Capital/Stockholders' Equity - USD ($)	Total	Additional Paid In Capital	Accumulated Other Comprehensive Income	Retained Earnings	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. 29, 2023							172,765,161	73,229,675
Beginning balance at Jan. 29, 2023	$ 2,410,000,000	$ 1,241,000,000	$ 45,000,000	$ 458,000,000	$ 663,000,000		$ 2,000,000	$ 1,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	133,000,000			86,000,000	47,000,000
Equity-based compensation	2,000,000	1,000,000			1,000,000
Net interest rate swap gain, net of tax	(8,000,000)		(5,000,000)		(3,000,000)
Distributions to non-controlling interest holders	(17,000,000)				(17,000,000)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest (in shares)							(9,377,183)	(5,622,817)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest	(332,000,000)	(83,000,000)		(141,000,000)	(108,000,000)
Exchange of Partnership Interests and Class B Shares for Class A Shares (in shares)							2,325,080	2,325,080
Exchange of Partnership Interests and Class B Shares for Class A Shares	0	18,000,000	1,000,000		(19,000,000)
Establishment/adjustment of deferred tax asset associated with Core & Main investment in Core & Main Holdings, LP	18,000,000	18,000,000
Establishment of Tax Receivable Agreement liabilities	(14,000,000)	(14,000,000)
Activity under equity-based compensation plans, net of tax withholdings (in shares)							93,460
Activity under equity-based compensation plans, net of tax withholdings	0	0
Ending balance (in shares) at Apr. 30, 2023							165,806,518	65,281,778
Ending balance at Apr. 30, 2023	2,192,000,000	1,181,000,000	41,000,000	403,000,000	564,000,000		$ 2,000,000	$ 1,000,000
Beginning balance (in shares) at Jan. 29, 2023							172,765,161	73,229,675
Beginning balance at Jan. 29, 2023	2,410,000,000	1,241,000,000	45,000,000	458,000,000	663,000,000		$ 2,000,000	$ 1,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	297,000,000
Net interest rate swap gain, net of tax	0
Ending balance (in shares) at Jul. 30, 2023							168,590,990	57,634,013
Ending balance at Jul. 30, 2023	2,213,000,000	1,196,000,000	49,000,000	447,000,000	518,000,000		$ 2,000,000	$ 1,000,000
Beginning balance (in shares) at Apr. 30, 2023							165,806,518	65,281,778
Beginning balance at Apr. 30, 2023	2,192,000,000	1,181,000,000	41,000,000	403,000,000	564,000,000		$ 2,000,000	$ 1,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	164,000,000			110,000,000	54,000,000
Equity-based compensation	3,000,000	2,000,000			1,000,000
Net interest rate swap gain, net of tax	8,000,000		6,000,000		2,000,000
Distributions to non-controlling interest holders	(12,000,000)	(2,000,000)			(10,000,000)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest (in shares)							(3,125,728)	(1,874,272)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest	(141,000,000)	(32,000,000)		(66,000,000)	(43,000,000)
Exchange of Partnership Interests and Class B Shares for Class A Shares (in shares)							5,770,323	5,773,493
Exchange of Partnership Interests and Class B Shares for Class A Shares	0	48,000,000	2,000,000		(50,000,000)
Establishment/adjustment of deferred tax asset associated with Core & Main investment in Core & Main Holdings, LP	45,000,000	45,000,000
Establishment of Tax Receivable Agreement liabilities	(47,000,000)	(47,000,000)
Activity under equity-based compensation plans, net of tax withholdings (in shares)							139,877
Activity under equity-based compensation plans, net of tax withholdings	1,000,000	1,000,000
Ending balance (in shares) at Jul. 30, 2023							168,590,990	57,634,013
Ending balance at Jul. 30, 2023	2,213,000,000	1,196,000,000	49,000,000	447,000,000	518,000,000		$ 2,000,000	$ 1,000,000
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	46,000,000	189,000,000	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 interest rate swap gain, net of tax	18,000,000		17,000,000		1,000,000
Distributions to non-controlling interest holders	(4,000,000)	(2,000,000)			(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)
Tax withholdings under equity-based compensation plans	(2,000,000)	(2,000,000)
Share issuances under equity-based compensation plans, net of tax withholdings (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	63,000,000	284,000,000	74,000,000		$ 2,000,000	$ 0
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	46,000,000	189,000,000	73,000,000		$ 2,000,000	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	227,000,000
Net interest rate swap gain, net of tax	(15,000,000)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest (in shares)						(429,996)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest	(21,000,000)
Ending balance (in shares) at Jul. 28, 2024							192,642,689	8,483,709
Ending balance at Jul. 28, 2024	1,720,000,000	1,225,000,000	32,000,000	385,000,000	76,000,000		$ 2,000,000	$ 0
Beginning balance (in shares) at Apr. 28, 2024							192,634,317	8,813,532
Beginning balance at Apr. 28, 2024	1,644,000,000	1,221,000,000	63,000,000	284,000,000	74,000,000		$ 2,000,000	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	126,000,000			119,000,000	7,000,000
Equity-based compensation	4,000,000	4,000,000
Net interest rate swap gain, net of tax	(33,000,000)		(31,000,000)		(2,000,000)
Distributions to non-controlling interest holders	(2,000,000)	(1,000,000)			(1,000,000)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest (in shares)							(429,996)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest	(21,000,000)	(3,000,000)		(18,000,000)
Exchange of Partnership Interests and Class B Shares for Class A Shares (in shares)							326,889	329,823
Exchange of Partnership Interests and Class B Shares for Class A Shares	0	2,000,000			(2,000,000)
Establishment/adjustment of deferred tax asset associated with Core & Main investment in Core & Main Holdings, LP	5,000,000	5,000,000
Establishment of Tax Receivable Agreement liabilities	(4,000,000)	(4,000,000)
Activity under equity-based compensation plans, net of tax withholdings (in shares)							111,479
Activity under equity-based compensation plans, net of tax withholdings	1,000,000	1,000,000
Ending balance (in shares) at Jul. 28, 2024							192,642,689	8,483,709
Ending balance at Jul. 28, 2024	$ 1,720,000,000	$ 1,225,000,000	$ 32,000,000	$ 385,000,000	$ 76,000,000		$ 2,000,000	$ 0