Condensed Consolidated Statements of Changes in Partners' Capital/Stockholders' Equity - USD ($) $ in Millions	Total	Partners’ Capital	Common Stock Class A common stock	Common Stock Class B common stock	Additional Paid In Capital	Accumulated Other Comprehensive Income	Retained Earnings	Non-Controlling Interests
Beginning balance at Jan. 31, 2021	$ 801	$ 801
Partners' Capital
Equity-based compensation	1	1
Net income	27	27
Net interest rate swap gain, net of tax	2	2
Distributions to partners	(10)	(10)
Ending balance at May. 02, 2021	821	821
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27	$ 27
Net interest rate swap gain, net of tax	2
Net income	137						$ 86	$ 51
Beginning balance at Jan. 30, 2022	1,831		$ 2	$ 1	$ 1,214	$ 16	92	506
Beginning balance (in shares) at Jan. 30, 2022			167,522,403	78,398,141
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	137						86	51
Equity-based compensation	3						2	1
Net interest rate swap gain, net of tax	37					23		14
Distributions to non-controlling interest holders	(3)							(3)
Exchange of Partnership Interests and Class B Shares for Class A Shares (in shares)			55,595	(55,713)
Adjustment of deferred tax liability associated with Core & Main investment in Core & Main Holdings, LP	1				1
Vesting of restricted stock units, net of tax withholdings (in shares)			1,321
Forfeiture of Class A Shares and Partnership Interests (in shares)			(20)	(34,703)
Noncontrolling Interest, Adjustment For Vesting Of Partnership Interests	0				(1)			1
Ending balance at May. 01, 2022	$ 2,006		$ 2	$ 1	$ 1,214	$ 39	$ 180	$ 570
Ending balance (in shares) at May. 01, 2022			167,579,299	78,307,725