Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net sales	$ 2,788.0	$ 2,310.0	$ 2,828.0
Operating costs and expenses:
Cost of sales	(1,920.0)	(2,007.0)	(2,084.0)
Gross Profit	867.0	303.0	744.0
Selling, general, and administrative expenses	(211.0)	(230.0)	(209.0)
Loss on impairments	(16.0)	(92.0)	(11.0)
Other operating credits and charges, net	(4.0)	(1.0)	2.0
Income from operations	636.0	(20.0)	526.0
Non-operating income (expense):
Interest (expense) income	19.0	19.0	16.0
Investment Income, Net	4.0	10.0	18.0
Other nonoperating items	0.0	6.0	(4.0)
Income from continuing operations before income taxes	621.0	(23.0)	524.0
Provision for income taxes	(125.0)	13.0	(122.0)
Equity in unconsolidated affiliate	1.0	0.0	(3.0)
Income from continuing operations	497.0	(10.0)	399.0
Loss from discontinued operations before taxes	0.0	0.0	(5.0)
Provision for income taxes from discontinued operations	0.0	0.0	1.0
Loss from discontinued operations	0.0	0.0	(4.0)
Net income	497.0	(10.0)	395.0
Net loss attributed to noncontrolling interest	2.0	5.0	0.0
Net income attributed to LP	499.0	(5.0)	395.0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	499.0	(5.0)	399.0
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	$ 0.0	$ 0.0	$ (4.0)
Basic net income (loss) per share:
Income per share from continuing operations	$ 4.48	$ (0.04)	$ 2.79
Loss per share from discontinued operations	0	0	(0.03)
Net income per share - diluted	4.48	(0.04)	2.76
Diluted net earnings (loss) per share:
Income per share from continuing operations	4.46	(0.04)	2.76
Loss per share from discontinued operations	0	0	(0.03)
Net income per share - diluted	$ 4.46	$ (0.04)	$ 2.73
Weighted average number of shares outstanding - basic	111	123	143
Weighted average number of shares outstanding, diluted	112	123	144