Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net sales	$ 611	$ 1,130	$ 1,195	$ 2,297
Cost of sales	(492)	(611)	(975)	(1,158)
Gross Profit	119	518	220	1,139
Selling, general, and administrative expenses	(66)	(67)	(133)	(129)
Impairment of long-lived assets, net	24	0	24	0
Other operating credits and charges, net	(21)	11	(26)	10
Income from operations	8	462	37	1,019
Non-operating income (expense):
Interest Expense	(3)	(3)	(6)	(6)
Investment income	2	2	7	3
Other non-operating items	(8)	2	(16)	(8)
Income (loss) before income taxes	(1)	463	22	1,007
Provision for income taxes	(21)	(116)	(22)	(240)
Equity in unconsolidated affiliate	1	1	1	2
Income (loss) from continuing operations	(21)	348	1	769
Income from discontinued operations, net of income taxes	0	37	0	99
Net income (loss)	(21)	385	1	868
Net loss attributed to non-controlling interest	1	0	0	1
Net income (loss) attributed to LP	$ (20)	$ 384	$ 1	$ 868
Net income (loss) attributed to LP per share of common stock:
Income per share continuing operations - basic (in dollars per share)	$ (0.28)	$ 4.30	$ 0.02	$ 9.25
Income per share discontinued operations - basic (in dollars per share)	0	0.46	0	1.18
Net income per share - basic (in dollars per share)	(0.28)	4.76	0.02	10.43
Income per share continuing operations - diluted (in dollars per share)	(0.28)	4.28	0.02	9.19
Income per share discontinued operations - diluted (in dollars per share)	0	0.45	0	1.18
Net income per share - diluted (in dollars per share)	$ (0.28)	$ 4.73	$ 0.02	$ 10.36
Average shares of common stock used to compute Net income (loss) per share:
Basic (in shares)	72	81	72	83
Diluted (in shares)	72	81	72	84