Pay vs Performance Disclosure - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jan. 30, 2022	Jul. 22, 2021	Jan. 28, 2024	Jan. 29, 2023	Jan. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ 92	$ 74	$ 371	$ 366	$ 166	[1]

[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.