Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net sales	$ 852	$ 1,018	$ 3,149	$ 3,080
Cost of sales	(620)	(513)	(1,778)	(1,423)
Gross Profit	232	505	1,370	1,657
Selling, general, and administrative expenses	(67)	(58)	(196)	(155)
Other Operating Charges And Credits, Net	7	2	17	5
Income from operations	172	448	1,191	1,507
Non-operating income (expense):
Interest Expense	(3)	(4)	(9)	(12)
Investment income	5	0	8	1
Other non-operating items	(3)	(2)	(11)	(13)
Income before income taxes	172	442	1,178	1,482
Provision for income taxes	(44)	(111)	(284)	(350)
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	1	1	4	3
Income from continuing operations	129	332	898	1,134
Income from discontinued operations, net of income taxes	97	33	196	47
Net income	226	365	1,093	1,182
Net loss attributed to noncontrolling interest	0	0	1	1
Net income attributed to LP	$ 226	$ 365	$ 1,094	$ 1,183
Net income attributed to LP per share of common stock:
Income per share continuing operations - basic (in dollars per share)	$ 1.75	$ 3.55	$ 11.23	$ 11.34
Income per share discontinued operations - basic (in dollars per share)	1.32	0.35	2.45	0.47
Net income per share - basic (in dollars per share)	3.07	3.90	13.67	11.81
Income per share continuing operations - diluted (in dollars per share)	1.74	3.52	11.16	11.26
Income per share discontinued operations - diluted (in dollars per share)	1.31	0.35	2.43	0.47
Net income per share - diluted (in dollars per share)	$ 3.05	$ 3.87	$ 13.59	$ 11.73
Average shares of common stock used to compute net income per share:
Basic (in shares)	74	94	80	100
Diluted (in shares)	74	94	80	101