Non-controlling Interests (Details) - Holdings - shares				6 Months Ended	12 Months Ended
	Jan. 29, 2023	Jan. 30, 2022	Jul. 23, 2021	Jan. 30, 2022	Jan. 29, 2023
Partnership Interests
Partnership Interests (in units)	245,236,634	242,866,811	200,785,693	242,866,811	245,236,634
Issuance of Partnership Interests (in units)				40,116,279	110,644
Exchange of Partnership Interests (in units)				0	(1,629)
Vesting of Partnership Interests (in units)				1,964,839	2,260,828
Ownership Percentage
Ownership Percentage	100.00%	100.00%	100.00%
Issuance of Partnership Interests (percent)				0.00%	0.00%
Exchange of Partnership Interests (percent)				0.00%	0.00%
Vesting of Partnership Interests (percent)				0.00%	0.00%
Partnership Interests, Forfeiture, Units					(20)
Partnership Interests, Forfeited, Increase (Decrease), Percentage					0.00%
Core & Main
Partnership Interests
Partnership Interests (in units)	172,765,161	167,522,403	119,950,882	167,522,403	172,765,161
Issuance of Partnership Interests (in units)				40,116,279	110,644
Exchange of Partnership Interests (in units)				7,455,242	5,132,134
Vesting of Partnership Interests (in units)				0	0
Ownership Percentage
Ownership Percentage	70.40%	69.00%	59.70%
Issuance of Partnership Interests (percent)				6.70%	0.00%
Exchange of Partnership Interests (percent)				3.10%	2.10%
Vesting of Partnership Interests (percent)				(0.50%)	(0.70%)
Partnership Interests, Forfeiture, Units					(20)
Partnership Interests, Forfeited, Increase (Decrease), Percentage					0.00%
Continuing Limited Partners
Partnership Interests
Partnership Interests (in units)	72,471,473	75,344,408	80,834,811	75,344,408	72,471,473
Issuance of Partnership Interests (in units)				0	0
Exchange of Partnership Interests (in units)				(7,455,242)	(5,133,763)
Vesting of Partnership Interests (in units)				1,964,839	2,260,828
Ownership Percentage
Ownership Percentage	29.60%	31.00%	40.30%
Issuance of Partnership Interests (percent)				(6.70%)	0.00%
Exchange of Partnership Interests (percent)				(3.10%)	(2.10%)
Vesting of Partnership Interests (percent)				0.50%	0.70%
Partnership Interests, Forfeiture, Units					0
Partnership Interests, Forfeited, Increase (Decrease), Percentage					0.00%