Consolidated Statements of Changes in Stockholders' Equity/Partners' Capital - USD ($)	Total	Class A common stock	Common Stock Class A common stock	Common Stock Class B common stock	Additional Paid In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Non-Controlling Interests
Beginning balance (in shares) at Jan. 29, 2023			172,765,161	73,229,675
Beginning balance at Jan. 29, 2023	$ 2,410,000,000		$ 2,000,000	$ 1,000,000	$ 1,241,000,000	$ 45,000,000	$ 458,000,000	$ 663,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	531,000,000						371,000,000	160,000,000
Equity-based compensation	10,000,000				8,000,000			2,000,000
Net interest rate swap gain (loss), net of tax	(22,000,000)					(18,000,000)		(4,000,000)
Distributions to non-controlling interest holders	(42,000,000)				(5,000,000)			(37,000,000)
Exchange of Partnership Interests and Class B Shares for Class A Shares (in shares)			46,683,021	(46,731,040)
Exchange of Partnership Interests and Class B Shares for Class A Shares	0			$ (1,000,000)	313,000,000	19,000,000		(331,000,000)
Establishment/adjustment of deferred tax asset associated with Core & Main investment in Core & Main Holdings, LP	515,000,000				515,000,000
Establishment of tax receivable agreement liabilities	(537,000,000)				(537,000,000)
Activity under equity-based compensation plans, net of tax withholdings (in shares)			346,977
Activity under equity-based compensation plans, net of tax withholdings	3,000,000				3,000,000
Repurchase and Retirement of equity interests (in shares)			(28,131,551)	(16,868,449)
Repurchase and retirement of equity interests	(1,344,000,000)				(324,000,000)		(640,000,000)	(380,000,000)
Ending balance (in shares) at Jan. 28, 2024			191,663,608	9,630,186
Ending balance at Jan. 28, 2024	1,524,000,000		$ 2,000,000	$ 0	1,214,000,000	46,000,000	189,000,000	73,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	434,000,000						411,000,000	23,000,000
Equity-based compensation	14,000,000				14,000,000
Net interest rate swap gain (loss), net of tax	(20,000,000)					(19,000,000)		(1,000,000)
Distributions to non-controlling interest holders	(8,000,000)				(3,000,000)			(5,000,000)
Exchange of Partnership Interests and Class B Shares for Class A Shares (in shares)			1,684,022	(1,694,125)
Exchange of Partnership Interests and Class B Shares for Class A Shares	0				9,000,000			(9,000,000)
Establishment/adjustment of deferred tax asset associated with Core & Main investment in Core & Main Holdings, LP	23,000,000				23,000,000
Establishment of tax receivable agreement liabilities	(19,000,000)				(19,000,000)
Activity under equity-based compensation plans, net of tax withholdings (in shares)			443,089
Activity under equity-based compensation plans, net of tax withholdings	2,000,000				2,000,000
Repurchase and Retirement of equity interests (in shares)		(3,974,820)	(3,974,820)
Repurchase and retirement of equity interests	(176,000,000)				(20,000,000)		(151,000,000)	(5,000,000)
Ending balance (in shares) at Feb. 02, 2025			189,815,899	7,936,061
Ending balance at Feb. 02, 2025	1,774,000,000		$ 2,000,000	$ 0	1,220,000,000	27,000,000	449,000,000	76,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	462,000,000						441,000,000	21,000,000
Equity-based compensation	17,000,000				16,000,000			1,000,000
Net interest rate swap gain (loss), net of tax	(35,000,000)					(33,000,000)		(2,000,000)
Distributions to non-controlling interest holders	(7,000,000)							(7,000,000)
Exchange of Partnership Interests and Class B Shares for Class A Shares (in shares)			1,288,769	(1,324,798)
Exchange of Partnership Interests and Class B Shares for Class A Shares	0				8,000,000			(8,000,000)
Establishment/adjustment of deferred tax asset associated with Core & Main investment in Core & Main Holdings, LP	20,000,000				20,000,000
Establishment of tax receivable agreement liabilities	(18,000,000)				(18,000,000)
Activity under equity-based compensation plans, net of tax withholdings (in shares)			839,361
Activity under equity-based compensation plans, net of tax withholdings	16,000,000				16,000,000
Repurchase and Retirement of equity interests (in shares)		(3,173,594)	(3,173,594)
Repurchase and retirement of equity interests	(155,000,000)				(16,000,000)		(135,000,000)	(4,000,000)
Ending balance (in shares) at Feb. 01, 2026			188,770,435	6,611,263
Ending balance at Feb. 01, 2026	$ 2,074,000,000		$ 2,000,000	$ 0	$ 1,246,000,000	$ (6,000,000)	$ 755,000,000	$ 77,000,000

Core & Main, Inc. 10-K