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Earnings per Share (Tables)
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table sets forth the computation of basic and diluted earnings per share:
Dollar and share amounts in millions, except per
share amounts
Quarter Ended March 31,
2013
 
2012
Numerator:
 
 
 
Income (loss) attributed to LP common shares:
 
 
 
Income (loss) from continuing operations
$
65.4

 
$
(11.2
)
Loss from discontinued operations
(0.1
)
 
(0.1
)
Net income (loss)
$
65.3

 
$
(11.3
)
Denominator:
 
 
 
Basic - weighted average common shares outstanding
138.4

 
136.6

Dilutive effect of stock warrants
3.0

 
—

Dilutive effect of stock plans
3.0

 
—

Diluted shares outstanding
144.4

 
136.6

Basic earnings per share:
 
 
 
Income (loss) from continuing operations
$
0.47

 
$
(0.08
)
Loss from discontinued operations
—

 
—

Net income (loss) per share
$
0.47

 
$
(0.08
)
Diluted earnings per share:
 
 
 
Income (loss) from continuing operations
$
0.45

 
$
(0.08
)
Loss from discontinued operations
—

 
—

Net income (loss) per share
$
0.45

 
$
(0.08
)