Non-controlling Interests (Details) - Holdings - shares			6 Months Ended
	May 01, 2022	Jan. 30, 2022	Jul. 31, 2022
Partnership Interests
Partnership Interests (in units)		242,866,811	243,170,956
Issuance of Partnership Interests (in units)			8,276
Exchange of Partnership Interests (in units)			(118)
Forfeiture of Partnership Interests (in units)			(20)
Vesting of Partnership Interests (in units)			296,007
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)		167,522,403	167,963,575
Issuance of Partnership Interests (in units)			8,276
Exchange of Partnership Interests (in units)			432,916
Forfeiture of Partnership Interests (in units)			(20)
Vesting of Partnership Interests (in units)			0
Ownership Percentage
Ownership Percentage	69.10%	69.00%
Issuance of Partnership Interests (percent)			0.00%
Exchange of Partnership Interests (percent)			0.20%
Forfeiture of Partnership Interests (percent)			0.00%
Vesting of Partnership Interests (percent)			(0.10%)
Continuing Limited Partners
Partnership Interests
Partnership Interests (in units)		75,344,408	75,207,381
Issuance of Partnership Interests (in units)			0
Exchange of Partnership Interests (in units)			(433,034)
Forfeiture of Partnership Interests (in units)			0
Vesting of Partnership Interests (in units)			296,007
Ownership Percentage
Ownership Percentage	30.90%	31.00%
Issuance of Partnership Interests (percent)			0.00%
Exchange of Partnership Interests (percent)			(0.20%)
Forfeiture of Partnership Interests (percent)			0.00%
Vesting of Partnership Interests (percent)			0.10%