Non-controlling Interests (Details) - Holdings - shares			3 Months Ended
	May 01, 2022	Jan. 30, 2022	May 01, 2022
Partnership Interests
Partnership Interests (in units)	243,127,545	242,866,811	243,127,545
Issuance of Partnership Interests (in units)			1,321
Exchange of Partnership Interests (in units)			(118)
Forfeiture of Partnership Interests (in units)			(20)
Vesting of Partnership Interests (in units)			259,551
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)	167,579,299	167,522,403	167,579,299
Issuance of Partnership Interests (in units)			1,321
Exchange of Partnership Interests (in units)			55,595
Forfeiture of Partnership Interests (in units)			(20)
Vesting of Partnership Interests (in units)			0
Ownership Percentage
Ownership Percentage	68.90%	69.00%
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)			(0.10%)
Continuing Limited Partners
Partnership Interests
Partnership Interests (in units)	75,548,246	75,344,408	75,548,246
Issuance of Partnership Interests (in units)			0
Exchange of Partnership Interests (in units)			(55,713)
Forfeiture of Partnership Interests (in units)			0
Vesting of Partnership Interests (in units)			259,551
Ownership Percentage
Ownership Percentage	31.10%	31.00%
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)			0.10%