Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Aug. 02, 2026	Aug. 03, 2025	Aug. 02, 2026	Aug. 03, 2025
Statement of Comprehensive Income [Abstract]
Net income	$ 150	$ 141	$ 263	$ 246
Net comprehensive gain (loss), net of tax (expense) benefit of $(2), $3, $(4) and $10, respectively	4	(8)	9	(29)
Total comprehensive income	154	133	272	217
Less: comprehensive income attributable to non-controlling interests	6	7	11	11
Total comprehensive income attributable to Core & Main, Inc.	$ 148	$ 126	$ 261	$ 206

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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