Selected Segment Data (Details) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) operatingSegment	Sep. 30, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments \| operatingSegment			3
Net sales	$ 722.0	$ 728.0	$ 2,261.0	$ 1,923.0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	90.0	118.0	358.0	119.0
Net income attributed to non-controlling interest	0.0	0.0	0.0	0.0
Income from continuing operations attributed to LP	90.0	118.0	358.0	119.0
Provision for income taxes	23.0	44.0	117.0	66.0
Depreciation and amortization	31.0	30.0	93.0	87.0
Stock-based compensation expense	(4.0)	(2.0)	(15.0)	(9.0)
Loss on impairment attributed to LP	0.0	1.0	0.0	1.0
Other operating income (expense) exclusive of product discontinuance charges	1.0	(7.0)	2.0	16.0
Business exit charges	0.0	1.0	(14.0)	35.0
Interest Expense	4.0	4.0	12.0	9.0
Investment income	(6.0)	(4.0)	(17.0)	(10.0)
Loss due to settlement	0.0	0.0	0.0	6.0
Other non-operating items	(4.0)	0.0	2.0	(11.0)
Adjusted EBITDA	153.0	190.0	564.0	349.0
Value-add
Segment Reporting Information [Line Items]
Net sales	599.0	560.0	1,833.0	1,552.0
Siding
Segment Reporting Information [Line Items]
Net sales	420.0	345.0	1,196.0	996.0
Adjusted EBITDA	123.0	71.0	318.0	198.0
Siding \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	420.0	345.0	1,196.0	996.0
Siding \| Value-add
Segment Reporting Information [Line Items]
Net sales	418.0	342.0	1,190.0	989.0
OSB
Segment Reporting Information [Line Items]
Net sales	253.0	335.0	917.0	754.0
Adjusted EBITDA	33.0	120.0	249.0	161.0
OSB \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	253.0	335.0	917.0	754.0
OSB \| Value-add
Segment Reporting Information [Line Items]
Net sales	136.0	174.0	507.0	412.0
LPSA
Segment Reporting Information [Line Items]
Net sales	47.0	45.0	140.0	153.0
Adjusted EBITDA	9.0	6.0	29.0	31.0
LPSA \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	47.0	45.0	140.0	153.0
LPSA \| Value-add
Segment Reporting Information [Line Items]
Net sales	46.0	44.0	136.0	151.0
Other
Segment Reporting Information [Line Items]
Net sales	2.0	4.0	7.0	21.0
Adjusted EBITDA	(3.0)	0.0	(6.0)	(15.0)
Other \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	2.0	4.0	7.0	21.0
Other \| Value-add
Segment Reporting Information [Line Items]
Net sales	0.0	0.0	0.0	0.0
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ (9.0)	$ (7.0)	$ (26.0)	$ (26.0)

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