Earnings per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Loss Attributed to LP Common Shares [Abstract]
Income (loss) from continuing operations	$ (11.2)	$ (23.0)
Loss from discontinued operations	(0.1)	0
Net income (loss)	$ (11.3)	$ (23.0)
Denominator:
Basic - weighted average common shares outstanding	136.6	131.3
Dilutive effect of stock warrants	0	0
Dilutive effect of stock plans	0	0
Diluted shares outstanding	136.6	131.3
Basic earnings per share:
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)
Diluted earnings per share:
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)
Antidilutive securities excluded from computation of earnings per share	7.4	9.6

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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