Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net sales	$ 2,310.0	$ 2,828.0	$ 2,734.0
Operating costs and expenses:
Cost of sales	(2,007.0)	(2,084.0)	(1,998.0)
Gross Profit	303.0	744.0	736.0
Selling, general, and administrative expenses	(230.0)	(209.0)	(191.0)
Impairment of long-lived assets	(92.0)	(11.0)	(9.0)
Other operating credits and charges, net	(1.0)	2.0	(3.0)
Income from operations	(20.0)	526.0	533.0
Non-operating income (expense):
Interest (expense) income	9.0	(2.0)	9.0
Other nonoperating items	6.0	(4.0)	(14.0)
Income from continuing operations before income taxes	(23.0)	524.0	510.0
Provision for income taxes	13.0	(122.0)	(119.0)
Equity in unconsolidated affiliate	0.0	(3.0)	0.0
Income from continuing operations	(10.0)	399.0	391.0
Loss from discontinued operations before taxes	0.0	(5.0)	(2.0)
Provision for income taxes from discontinued operations	0.0	1.0	1.0
Loss from discontinued operations	0.0	(4.0)	(1.0)
Net income	(10.0)	395.0	390.0
Net loss attributed to noncontrolling interest	5.0	0.0	0.0
Net income attributed to LP	(5.0)	395.0	390.0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ (5.0)	399.0	391.0
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		$ (4.0)	$ (1.0)
Basic net income (loss) per share:
Income per share from continuing operations	$ (0.04)	$ 2.79	$ 2.71
Loss per share from discontinued operations	0	(0.03)	(0.01)
Net income per share - diluted	(0.04)	2.76	2.70
Diluted net earnings (loss) per share:
Income per share from continuing operations	(0.04)	2.76	2.67
Loss per share from discontinued operations	0	(0.03)	(0.01)
Net income per share - diluted	$ (0.04)	$ 2.73	$ 2.66
Weighted average number of shares outstanding - basic	123	143	144
Weighted average number of shares outstanding, diluted	123	144	146