Non-controlling Interests (Details) - Holdings - shares			9 Months Ended
	Oct. 30, 2022	Jan. 30, 2022	Oct. 30, 2022
Partnership Interests
Partnership Interests (in units)	245,130,681	242,866,811	245,130,681
Issuance of Partnership Interests (in units)			10,218
Exchange of Partnership Interests (in units)			(118)
Forfeiture of Partnership Interests (in units)			20
Vesting of Partnership Interests (in units)			2,253,790
Ownership Percentage
Ownership Percentage	100.00%	100.00%
Issuance of Partnership Interests (percent)			0.00%
Exchange of Partnership Interests (percent)			0.00%
Forfeiture of Partnership Interests (percent)			0.00%
Vesting of Partnership Interests (percent)			0.00%
Core & Main
Partnership Interests
Partnership Interests (in units)	172,396,996	167,522,403	172,396,996
Issuance of Partnership Interests (in units)			10,218
Exchange of Partnership Interests (in units)			(4,864,395)
Forfeiture of Partnership Interests (in units)			20
Vesting of Partnership Interests (in units)			0
Ownership Percentage
Ownership Percentage	70.30%	69.00%
Issuance of Partnership Interests (percent)			0.00%
Exchange of Partnership Interests (percent)			2.00%
Forfeiture of Partnership Interests (percent)			0.00%
Vesting of Partnership Interests (percent)			(0.70%)
Continuing Limited Partners
Partnership Interests
Partnership Interests (in units)	72,733,685	75,344,408	72,733,685
Issuance of Partnership Interests (in units)			0
Exchange of Partnership Interests (in units)			(4,864,513)
Forfeiture of Partnership Interests (in units)			0
Vesting of Partnership Interests (in units)			2,253,790
Ownership Percentage
Ownership Percentage	29.70%	31.00%
Issuance of Partnership Interests (percent)			0.00%
Exchange of Partnership Interests (percent)			(2.00%)
Forfeiture of Partnership Interests (percent)			0.00%
Vesting of Partnership Interests (percent)			0.70%