Schedule I — Condensed Financial Information of Parent - Condensed Statement of Operations and Comprehensive Income (Details) - USD ($) $ in Millions	6 Months Ended		10 Months Ended	12 Months Ended
	Jan. 30, 2022	Jul. 22, 2021	Jan. 30, 2022	Jan. 29, 2023	Jan. 30, 2022		Jan. 31, 2021
Condensed Statement of Income Captions [Line Items]
Income before provision for income taxes				$ 709	$ 276		$ 46
Provision for income taxes				128	51		9
Net income	$ 92	$ 74		366	166	[1]	37
Net interest rate swap gain, net of tax (expense) of $(9) and $(5)				44	34		3
Comprehensive income				393	188
Other comprehensive income (loss), cash Flow hedge, gain (loss), after reclassification, tax				(9)	6		$ (1)
Parent Company
Condensed Statement of Income Captions [Line Items]
Equity in net income of subsidiary			$ 119	486
Income before provision for income taxes			119	486
Provision for income taxes			27	120
Net income			92	366
Net interest rate swap gain, net of tax (expense) of $(9) and $(5)			18	27
Comprehensive income			$ 110	393
Other comprehensive income (loss), cash Flow hedge, gain (loss), after reclassification, tax				$ (9)	$ (5)

[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 (as defined in Note 1) 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.