Acquisitions - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Sep. 10, 2024	Aug. 01, 2024	Jul. 10, 2024	Jul. 01, 2024	May 01, 2024	Apr. 15, 2024	Feb. 12, 2024	Feb. 01, 2024	Dec. 31, 2023	Nov. 01, 2023	Oct. 02, 2023	Sep. 05, 2023	Aug. 01, 2023	Jul. 11, 2023	Jun. 12, 2023	Mar. 31, 2023	Jan. 04, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Prior to acquisition annual sales	$ 762.3
Business combination, acquisition related costs	9.9
Goodwill recognized	$ 2,094.7									$ 1,952.6									$ 1,916.3
Chicago Metal Supply & Fabrication, Inc.
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized		$ 5.0
Passaic Metal and Building Supplies Co. and affiliates
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized			$ 44.5
SSR Roof Supply Ltd.
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized			$ 6.0
Roofers Mart of Southern California, Inc.
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized				$ 0.6
Integrity Metals, LLC
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized					$ 5.5
Extreme Metal Fabricators, LLC
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized					$ 9.7
Smalley & Company
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized						$ 0.3
General Roofing & Siding Supply Co.
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized							$ 3.7
Metro Sealant & Waterproofing Supply, Inc.
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized								$ 22.4
Roofers Supply of Greenville
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized									$ 35.1
H&H Roofing Supply, LLC
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized											$ 1.1
Garvin Construction Products
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized												$ 17.0
S&H Building Material Corporation
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized													$ 5.3
All American Vinyl Siding Supply, LLC
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized														$ 0.7
Crossroads Roofing Supply, Inc.
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized															$ 5.8
Silver State Building Materials, Inc.
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized																$ 0.6
Al's Roofing Supply, Inc.
Business Acquisition [Line Items]
Goodwill recognized																	$ 3.7
Prince Building Systems, LLC
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized																	$ 0.3
First Coastal Exteriors, LLC
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Goodwill recognized																		$ 0.8
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Goodwill recognized	$ 177.1
Business acquisition, goodwill, tax deductible amount	$ 132.5