Consolidated Statements of Changes in Stockholders' Equity/Partners' Capital - USD ($) $ in Millions		Total	Interest rate swap 1	Interest rate swap 2	Partners’ Capital	Common Stock Class A common stock	Common Stock Class B common stock	Additional Paid In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Interest rate swap 1	Accumulated Other Comprehensive Income (Loss) Interest rate swap 2	Retained Earnings	Non-Controlling Interests	Non-Controlling Interests Interest rate swap 1	Non-Controlling Interests Interest rate swap 2
Beginning balance at Feb. 03, 2019		$ 1,051			$ 1,051
Partners' Capital
Equity-based compensation		4			4
Net income		36			36
Net interest rate swap gain (loss), net of tax		(9)			(9)
Distributions to partners		(311)			(311)
Ending balance at Feb. 02, 2020		771			771
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		36
Net interest rate swap gain (loss), net of tax		(10)
Equity investment from partners		1			1
Equity-based compensation		4			4
Net income		37			37
Net interest rate swap gain (loss), net of tax		3			3
Distributions to partners		(15)			(15)
Ending balance at Jan. 31, 2021		801			801
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		37
Net interest rate swap gain (loss), net of tax		3
Equity-based compensation		15			15
Net income		74			74
Net interest rate swap gain (loss), net of tax		4			4
Distributions to partners		(23)			(23)
Ending balance at Jul. 22, 2021		871			871
Beginning balance at Jan. 31, 2021		801			801
Partners' Capital
Net income	[1]	166
Ending balance at Jan. 30, 2022					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		225
Net interest rate swap gain (loss), net of tax		34
Ending balance (in shares) at Jan. 30, 2022						167,522,403	78,398,141
Ending balance at Jan. 30, 2022		1,831				$ 2	$ 1	$ 1,214	$ 16			$ 92	$ 506
Beginning balance at Jul. 22, 2021		871			871
Partners' Capital
Net income		92
Ending balance at Jan. 30, 2022					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of partners’ capital		0			$ (871)			871
Reorganization transactions (in shares)						119,950,882	85,853,383
Reorganization transactions		0				$ 1	$ 1	(2)
Reclassification of non-controlling interests upon reorganization		0						(300)	(2)				302
Issuance of Class A Shares, net of issuance costs (in shares)						40,116,279
Issuance of Class A Shares, net of issuance costs		756				$ 1		755
Adjustment of deferred tax liability associated with Core & Main investment in Core & Main Holdings, LP		200						200
Net income		151										92	59
Equity-based compensation		10						7					3
Net interest rate swap gain (loss), net of tax			$ 4	$ 26						$ 2	$ 16			$ 2	$ 10
Distributions to non-controlling interest holders		(34)											(34)
Exchange of Partnership Interests for Class A Shares (in shares)						7,455,242	(7,455,242)
Exchange of Partnership Interests for Class A Shares		0						49					(49)
Impact of Tax Receivable Agreements		(153)						(153)
Non-controlling interests adjustment for purchase of Partnership Interests and vesting of Core & Main Holdings, LP Partnership Interests held by non-controlling interests		0						(213)					213
Ending balance (in shares) at Jan. 30, 2022						167,522,403	78,398,141
Ending balance at Jan. 30, 2022		$ 1,831				$ 2	$ 1	$ 1,214	$ 16			$ 92	$ 506

[1] For the fiscal year ended January 30, 2022, the net income attributable to Core & Main, Inc. includes net income prior to the Reorganization Transactions of $74 million and net income subsequent to the Reorganization Transactions of $92 million. Refer to the Statements of Changes in Stockholders’ Equity/Partners’ Capital for a summary of net income attributable to Core & Main, Inc. subsequent to the Reorganization Transactions. See Note 1 for a description of the Basis of Presentation of the consolidated financial statements.