Reportable Segment and Geographical Information - Total Assets Disaggregated by Reportable Segment (Details) - USD ($) $ in Thousands	Sep. 27, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Total property, plant and equipment, net	$ 1,054,946	$ 1,127,037
Total assets	6,536,550	6,685,146
Operating Segments
Segment Reporting Information [Line Items]
Total property, plant and equipment, net	1,034,011	1,109,746
Total assets	6,226,924	6,338,034
Operating Segments \| Windows & Doors
Segment Reporting Information [Line Items]
Total property, plant and equipment, net	345,517	377,786
Total assets	2,544,172	2,896,080
Operating Segments \| Siding & Accessories
Segment Reporting Information [Line Items]
Total property, plant and equipment, net	187,269	193,235
Total assets	1,757,327	1,810,815
Operating Segments \| Metal Solutions
Segment Reporting Information [Line Items]
Total property, plant and equipment, net	501,225	538,725
Total assets	1,925,425	1,631,139
Corporate
Segment Reporting Information [Line Items]
Total property, plant and equipment, net	20,935	17,291
Total assets	$ 309,626	$ 347,112

Amount of asset recognized for present right to economic benefit.

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+ Details

Cornerstone Building Brands, Inc. 10-Q