Non-controlling Interests (Details) - Holdings - shares	3 Months Ended	12 Months Ended
	Apr. 28, 2024	Jan. 28, 2024
Partnership Interests
Partnership Interests (in units)	201,184,233	200,906,884
Issuance of Partnership Interests (in units)	158,097
Exchange of Partnership Interests (in units)	(4,042)
Vesting of Partnership Interests (in units)	123,294
Ownership Percentage
Ownership Percentage	100.00%	100.00%
Issuance of Partnership Interests (percent)	0.00%
Exchange of Partnership Interests (percent)	0.00%
Vesting of Partnership Interests (percent)	0.00%
Core & Main
Partnership Interests
Partnership Interests (in units)	192,634,317	191,663,608
Issuance of Partnership Interests (in units)	158,097
Exchange of Partnership Interests (in units)	(812,612)
Vesting of Partnership Interests (in units)	0
Ownership Percentage
Ownership Percentage	95.80%	95.40%
Issuance of Partnership Interests (percent)	0.00%
Exchange of Partnership Interests (percent)	(0.40%)
Vesting of Partnership Interests (percent)	0.00%
Continuing Limited Partners
Partnership Interests
Partnership Interests (in units)	8,549,916	9,243,276
Issuance of Partnership Interests (in units)	0
Exchange of Partnership Interests (in units)	(816,654)
Vesting of Partnership Interests (in units)	123,294
Ownership Percentage
Ownership Percentage	4.20%	4.60%
Issuance of Partnership Interests (percent)	0.00%
Exchange of Partnership Interests (percent)	(0.40%)
Vesting of Partnership Interests (percent)	0.00%