Earnings per Share (Details) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Loss Attributed to LP Common Shares [Abstract]
Income (loss) from continuing operations	$ (59.3)	$ (31.2)	$ (115.3)	$ (30.0)
Loss from discontinued operations	(6.3)	(0.8)	(8.8)	(2.2)
Net income (loss)	$ (65.6)	$ (32.0)	$ (124.1)	$ (32.2)
Denominator:
Basic - weighted average common shares outstanding	134.5	131.1	132.4	128.5
Dilutive effect of stock warrants	0	0	0	0
Dilutive effect of stock plans	0	0	0	0
Diluted shares outstanding	134.5	131.1	132.4	128.5
Basic earnings per share:
Income (loss) from continuing operations	$ (0.44)	$ (0.23)	$ (0.87)	$ (0.23)
Loss from discontinued operations	$ (0.05)	$ (0.01)	$ (0.07)	$ (0.02)
Net income (loss) per share	$ (0.49)	$ (0.24)	$ (0.94)	$ (0.25)
Diluted earnings per share:
Income (loss) from continuing operations	$ (0.44)	$ (0.23)	$ (0.87)	$ (0.23)
Loss from discontinued operations	$ (0.05)	$ (0.01)	$ (0.07)	$ (0.02)
Net income (loss) per share	$ (0.49)	$ (0.24)	$ (0.94)	$ (0.25)
Antidilutive securities excluded from computation of earnings per share	5.9	15.6	7.3
Stock Issued During Period, Shares, New Issues			5.0
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 1.39		$ 1.39
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	3.9		3.9