Acquisitions - Narrative (Details) $ in Millions	12 Months Ended
	Jan. 28, 2024 USD ($)	Jan. 29, 2023 USD ($)	Jan. 30, 2022 USD ($)	Jan. 16, 2024 branch_location	Dec. 04, 2023 branch_location	Nov. 28, 2023 branch_location	Jul. 12, 2023 branch_location	Jul. 10, 2023 branch_location	Apr. 17, 2023 branch_location	Mar. 06, 2023 branch_location	Dec. 05, 2022 branch_location	Oct. 10, 2022 branch_location	Oct. 03, 2022 branch_location	Aug. 08, 2022 branch_location	Jun. 28, 2022 branch_location	May 02, 2022 branch_location	Mar. 21, 2022 branch_location	Nov. 08, 2021 branch_location	Oct. 06, 2021 branch_location	Aug. 09, 2021 branch_location	Mar. 01, 2021 branch_location
Business Acquisition [Line Items]
Transaction value | $	$ 244	$ 124	$ 174
Goodwill expected to be tax deductible | $	$ 11	$ 21	$ 21
Pacific Pipe
Business Acquisition [Line Items]
Number of branch locations acquired																				4
Trumbull Industries & Manufacturing, Inc.
Business Acquisition [Line Items]
Number of branch locations acquired													3
Earthsavers Erosion Control, LLC
Business Acquisition [Line Items]
Number of branch locations acquired															3
Lee Supply Company, Inc.
Business Acquisition [Line Items]
Number of branch locations acquired				4
Granite Water Works, Inc.
Business Acquisition [Line Items]
Number of branch locations acquired					1
Enviroscape Erosion Control Materials Ltd.
Business Acquisition [Line Items]
Number of branch locations acquired						1
Foster Supply Inc.
Business Acquisition [Line Items]
Number of branch locations acquired								7
Midwest Pipe Supply Inc.
Business Acquisition [Line Items]
Number of branch locations acquired									1
Lanier Municipal Supply Co. Inc.
Business Acquisition [Line Items]
Number of branch locations acquired											4
Distributors, Inc.
Business Acquisition [Line Items]
Number of branch locations acquired												1
Inland Water Works Supply, Co.
Business Acquisition [Line Items]
Number of branch locations acquired														1
Catalone Pipe & Supply Co.
Business Acquisition [Line Items]
Number of branch locations acquired																		1
CES Industrial Piping Supply, LLC
Business Acquisition [Line Items]
Number of branch locations acquired																			1
Triple T Pipe & Supply, LLC
Business Acquisition [Line Items]
Number of branch locations acquired																					1
Landscape & Construction Supplies LLC
Business Acquisition [Line Items]
Number of branch locations acquired										2
J.W. D’Angelo Co.
Business Acquisition [Line Items]
Number of branch locations acquired							3
Lock City Supply, Inc.
Business Acquisition [Line Items]
Number of branch locations acquired																1
Dodson Engineered Products, Inc.
Business Acquisition [Line Items]
Number of branch locations acquired																	1