Selected Segment Data - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Net sales	$ 663	$ 722	$ 2,141	$ 2,261
Cost of sales	(534)	(530)	(1,637)	(1,591)
Selling, general, and administrative expenses	(95)	(75)	(250)	(215)
Depreciation and amortization	36	31	106	93
Other charges	12	5	25	17
Adjusted EBITDA	82	153	386	564
Allowance for doubtful accounts					$ (1)
Siding
Segment Reporting Information [Line Items]
Net sales	443	420	1,305	1,196
OSB
Segment Reporting Information [Line Items]
Net sales	179	253	696	917
LPSA
Segment Reporting Information [Line Items]
Net sales	39	47	134	140
Operating Segments
Segment Reporting Information [Line Items]
Net sales	661	720	2,135	2,253
Cost of sales	(531)	(527)	(1,628)	(1,583)
Selling, general, and administrative expenses	(75)	(61)	(206)	(174)
Depreciation and amortization	36	31	106	92
Other charges	5	2	12	6
Adjusted EBITDA	95	165	419	594
Operating Segments | Siding
Segment Reporting Information [Line Items]
Net sales	443	420	1,305	1,196
Cost of sales	(301)	(280)	(890)	(825)
Selling, general, and administrative expenses	(48)	(38)	(133)	(113)
Depreciation and amortization	20	19	60	55
Other charges	3	1	6	4
Adjusted EBITDA	117	123	348	318
Operating Segments | OSB
Segment Reporting Information [Line Items]
Net sales	179	253	696	917
Cost of sales	(203)	(215)	(643)	(656)
Selling, general, and administrative expenses	(18)	(17)	(52)	(47)
Depreciation and amortization	14	11	40	33
Other charges	1	1	4	2
Adjusted EBITDA	(27)	33	46	249
Operating Segments | LPSA
Segment Reporting Information [Line Items]
Net sales	39	47	134	140
Cost of sales	(27)	(32)	(95)	(101)
Selling, general, and administrative expenses	(9)	(6)	(21)	(14)
Depreciation and amortization	2	1	6	4
Other charges	0	0	2	0
Adjusted EBITDA	5	9	25	29
Other
Segment Reporting Information [Line Items]
Net sales	2	2	6	7
Cost of sales	(3)	(2)	(9)	(8)
Selling, general, and administrative expenses	(20)	(15)	(44)	(41)
Depreciation and amortization	0	0	0	0
Other charges	8	3	13	10
Adjusted EBITDA	$ (13)	$ (12)	$ (33)	$ (32)