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Earnings per Share (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Income (loss) attributed to LP common shares [Abstract]    
Income (loss) from continuing operations $ (14.2) $ 65.0
Income from discontinued operations 0 0.1
Net income (loss) $ (14.2) $ 65.1
Denominator:    
Basic - weighted average common shares outstanding 140,800,000 138,400,000
Dilutive effect of stock warrants 0 3,000,000
Dilutive effect of stock plans 0 3,000,000
Diluted shares outstanding 140,800,000 144,400,000
Basic earnings per share:    
Income (loss) from continuing operations $ (0.10) $ 0.47
Income from discontinued operations $ 0.00 $ 0.00
Net income (loss) per share $ (0.10) $ 0.47
Diluted earnings per share:    
Income (loss) from continuing operations $ (0.10) $ 0.45
Income from discontinued operations $ 0.00 $ 0.00
Net income (loss) per share $ (0.10) $ 0.45
Antidilutive securities excluded from computation of earnings per share 3,600,000 2,200,000
Warrants outstanding 1,462,119