Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Net sales	$ 724	$ 584
Cost of sales	(511)	(483)
Gross Profit	214	101
Selling, general, and administrative expenses	(69)	(66)
Other operating credits and charges, net	1	(5)
Income from operations	145	30
Non-operating income (expense):
Interest Expense	(4)	(3)
Investment income	6	5
Other non-operating items	1	(8)
Income before income taxes	148	23
Provision for income taxes	(41)	(1)
Equity in unconsolidated affiliate	1	0
Net income	108	22
Net income attributed to non-controlling interest	0	(1)
Net income attributed to LP	$ 108	$ 21
Net income attributed to LP per share of common stock:
Net income per share, basic (in dollars per share)	$ 1.49	$ 0.29
Net income per share, diluted (in dollars per share)	$ 1.48	$ 0.29
Average shares of common stock used to compute Net income per share:
Basic (in shares)	72	72
Diluted (in shares)	72	72