Consolidated Statement of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net sales	$ 361.5	$ 331.7
Operating costs and expenses:
Cost of sales	313.3	295.0
Depreciation and amortization	19.1	21.4
Selling and administrative	31.3	28.8
(Gain) loss on sale or impairment of long-lived assets, net	0.1	5.5
Other operating credits and charges, net	(0.2)	(0.8)
Total operating costs and expenses	363.6	349.9
Income (loss) from operations	(2.1)	(18.2)
Non-operating income (expense):
Interest expense, net of capitalized interest	(12.6)	(14.0)
Investment income	4.2	4.0
Other non-operating items	(0.1)	1.8
Total non-operating expense	(8.5)	(8.2)
Income (loss) from continuing operations before taxes and equity in losses of unconsolidated affiliates	(10.6)	(26.4)
Provision (benefit) for income taxes	(1.2)	(6.8)
Equity in loss (income) of unconsolidated affiliates	1.8	3.3
Income (loss) from continuing operations	(11.2)	(22.9)
Loss from discontinued operations before taxes	(0.2)	0
Benefit for income taxes	(0.1)	0
Loss from discontinued operations	(0.1)	0
Net income (loss)	(11.3)	(22.9)
Less: Net income (loss) attributed to non-controlling interest	0	0.1
Net income (loss) attributed to Louisiana-Pacific Corporation	(11.3)	(23.0)
Net income (loss) per share of common stock (basic):
Income (loss) from continuing operations	$ (0.08)	$ (0.18)
Loss from discontinued operations	$ 0.00	$ 0.00
Net income (loss) per share	$ (0.08)	$ (0.18)
Net income (loss) per share of common stock (diluted):
Income (loss) from continuing operations	$ (0.08)	$ (0.18)
Loss from discontinued operations diluted	$ 0.00	$ 0.00
Net income (loss) per share diluted	$ (0.08)	$ (0.18)
Average shares of stock outstanding - basic	136.6	131.3
Average shares of stock outstanding - diluted	136.6	131.3
Amounts attributed to LP Corporation common shareholders
Income (loss) from continuing operations, net of tax	(11.2)	(23.0)
Loss from discontinued operations, net of tax	(0.1)	0
Net loss attributed to Louisiana-Pacific Corporation	$ (11.3)	$ (23.0)