Consolidated Statement of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 1,337.0	$ 1,017.0
Cost of sales	(676.0)	(538.0)
Gross Profit	661.0	479.0
Selling, general, and administrative expenses	(65.0)	(48.0)
Other Operating Charges And Credits, Net	38.0	0.0
Income from operations	633.0	431.0
Non-operating income (expense):
Interest Expense	(3.0)	(5.0)
Investment income	1.0	0.0
Other non-operating items	(10.0)	(10.0)
Income before income taxes	621.0	416.0
Provision for income taxes	(139.0)	(96.0)
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	1.0	0.0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total	483.0	320.0
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	1.0	1.0
Net income attributed to LP	$ 484.0	$ 320.0
Net income per share of common stock:
Net income per share - basic	$ 5.64	$ 3.02
Net income per share - diluted	$ 5.60	$ 3.00
Diluted net income per share of common stock
Basic	86,000,000	106,000,000
Weighted average shares of stock outstanding - diluted	86,000,000	107,000,000