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
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	455,000,000
Net interest rate swap gain, net of tax	(4,000,000)
Ending balance (in shares) at Oct. 29, 2023							173,340,005	47,889,727
Ending balance at Oct. 29, 2023	2,215,000,000	1,227,000,000	49,000,000	491,000,000	446,000,000		$ 2,000,000	$ 0
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	158,000,000			112,000,000	46,000,000
Equity-based compensation	3,000,000	2,000,000			1,000,000
Net interest rate swap gain, net of tax	(4,000,000)		(3,000,000)		(1,000,000)
Distributions to non-controlling interest holders	(7,000,000)				(7,000,000)
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	(145,000,000)	(35,000,000)		(68,000,000)	(42,000,000)
Exchange of Partnership Interests and Class B Shares for Class A Shares (in shares)							7,847,494	7,870,014
Exchange of Partnership Interests and Class B Shares for Class A Shares	0	67,000,000	3,000,000		(69,000,000)			$ (1,000,000)
Establishment/adjustment of deferred tax asset associated with Core & Main investment in Core & Main Holdings, LP	65,000,000	65,000,000
Establishment of Tax Receivable Agreement liabilities	68,000,000	(68,000,000)
Activity under equity-based compensation plans, net of tax withholdings (in shares)							27,249
Activity under equity-based compensation plans, net of tax withholdings	0
Ending balance (in shares) at Oct. 29, 2023							173,340,005	47,889,727
Ending balance at Oct. 29, 2023	2,215,000,000	1,227,000,000	49,000,000	491,000,000	446,000,000		$ 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	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	367,000,000
Net interest rate swap gain, net of tax	(24,000,000)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest (in shares)						(2,890,483)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest	(121,000,000)
Ending balance (in shares) at Oct. 27, 2024							190,189,434	8,483,709
Ending balance at Oct. 27, 2024	1,750,000,000	1,213,000,000	23,000,000	433,000,000	79,000,000		$ 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	140,000,000			133,000,000	7,000,000
Equity-based compensation	4,000,000	4,000,000
Net interest rate swap gain, net of tax	(9,000,000)		(9,000,000)
Distributions to non-controlling interest holders	(1,000,000)				(1,000,000)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest (in shares)							(2,460,487)
Repurchase and Retirement of Class A and Class B shares and corresponding Partnership Interest	(100,000,000)	(12,000,000)		(85,000,000)	(3,000,000)
Establishment/adjustment of deferred tax asset associated with Core & Main investment in Core & Main Holdings, LP	(3,000,000)	(3,000,000)
Establishment of Tax Receivable Agreement liabilities	(1,000,000)	(1,000,000)
Activity under equity-based compensation plans, net of tax withholdings (in shares)							7,232
Activity under equity-based compensation plans, net of tax withholdings	0
Ending balance (in shares) at Oct. 27, 2024							190,189,434	8,483,709
Ending balance at Oct. 27, 2024	$ 1,750,000,000	$ 1,213,000,000	$ 23,000,000	$ 433,000,000	$ 79,000,000		$ 2,000,000	$ 0