Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 03, 2025	Jul. 28, 2024	Aug. 03, 2025	Jul. 28, 2024
Disaggregation of Revenue [Line Items]
Total net sales	$ 2,093	$ 1,964	$ 4,004	$ 3,705
Pipes, valves & fittings products
Disaggregation of Revenue [Line Items]
Total net sales	1,430	1,329	2,727	2,498
Storm drainage products
Disaggregation of Revenue [Line Items]
Total net sales	335	306	630	559
Fire protection products
Disaggregation of Revenue [Line Items]
Total net sales	155	143	307	310
Meter products
Disaggregation of Revenue [Line Items]
Total net sales	$ 173	$ 186	$ 340	$ 338