Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Net sales	$ 2,941.0	$ 2,581.0	$ 3,854.0
Operating costs and expenses:
Cost of sales	(2,110.0)	(1,988.0)	(2,355.0)
Gross Profit	832.0	593.0	1,498.0
Selling, general, and administrative expenses	(291.0)	(257.0)	(264.0)
Loss on impairments	(5.0)	(30.0)	(1.0)
Other operating credits and charges, net	(4.0)	(19.0)	16.0
Income from operations	530.0	287.0	1,250.0
Non-operating income (expense):
Interest (expense) income	14.0	14.0	11.0
Investment Income, Net	22.0	18.0	14.0
Other nonoperating items	9.0	(43.0)	(97.0)
Income before income taxes	547.0	248.0	1,155.0
Provision for income taxes	(140.0)	(74.0)	(274.0)
Equity in unconsolidated affiliate	13.0	3.0	4.0
Income from continuing operations	420.0	178.0	885.0
Income from discontinued operations, net of income taxes	0.0	0.0	198.0
Net income	420.0	178.0	1,083.0
Net loss attributed to noncontrolling interest	0.0	0.0	3.0
Net income attributed to LP	$ 420.0	$ 178.0	$ 1,086.0
Basic net income (loss) per share:
Net income per share - basic	$ 5.91	$ 2.47	$ 13.94
Diluted net earnings (loss) per share:
Net income per share - diluted	$ 5.89	$ 2.46	$ 13.87
Weighted average number of shares outstanding - basic	71	72	78
Weighted average number of shares outstanding, diluted	71	72	78