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Earnings per Share
 6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Earnings per Share
EARNINGS PER SHARE
Basic earnings per share are based on the weighted-average number of shares of common stock outstanding. Diluted earnings per share are based upon the weighted-average number of shares of common stock outstanding plus all potentially dilutive securities that were assumed to be converted into common shares at the beginning of the period under the treasury stock method. This method requires that the effect of potentially dilutive common stock equivalents (employee and director stock options, stock settled stock appreciation rights, incentive shares and warrants) be excluded from the calculation of diluted earnings per share for the periods in which LP recognizes losses from continuing operations or at such time that the exercise prices of such awards are in excess of the weighted average market price of LP's common stock during these periods because the effect is anti-dilutive. Performance share awards are included in the calculation of earnings per share using the contingently issuable method. 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 June 30,
 
Six Months Ended June 30,
2013
 
2012
 
2013
 
2012
Numerator:
 
 
 
 
 
 
 
Income (loss) attributed to LP common shares:
 
 
 
 
 
 
 
Income (loss) from continuing operations
$
94.2

 
$
(37.2
)
 
$
159.6

 
$
(48.4
)
Loss from discontinued operations
(0.1
)
 
(0.1
)
 
(0.2
)
 
(0.2
)
Net income (loss)
$
94.1

 
$
(37.3
)
 
$
159.4

 
$
(48.6
)
Denominator:
 
 
 
 
 
 
 
Basic - weighted average common shares outstanding
139.1

 
137.0

 
138.8

 
136.8

Dilutive effect of stock warrants
2.7

 
—

 
2.9

 
—

Dilutive effect of stock plans
2.3

 
—

 
2.6

 
—

Diluted shares outstanding
144.1

 
137.0

 
144.3

 
136.8

Basic earnings per share:
 
 
 
 
 
 
 
Income (loss) from continuing operations
$
0.68

 
$
(0.27
)
 
$
1.15

 
$
(0.35
)
Loss from discontinued operations
—

 
—

 
—

 
—

Net income (loss) per share
$
0.68

 
$
(0.27
)
 
$
1.15

 
$
(0.35
)
Diluted earnings per share:
 
 
 
 
 
 
 
Income (loss) from continuing operations
$
0.65

 
$
(0.27
)
 
$
1.10

 
$
(0.35
)
Loss from discontinued operations
—

 
—

 
—

 
—

Net income (loss) per share
$
0.65

 
$
(0.27
)
 
$
1.10

 
$
(0.35
)

For the quarter and six months ended June 30, 2013, stock options and SSARs related to approximately 2.4 million and 2.3 million shares of LP common stock were considered not in-the-money for purposes of LP's earnings per share calculation. For the quarter and six months ended June 30, 2012, stock options, stock warrants and SSARs relating to approximately 5.1 million and 5.2 million shares of LP common stock were considered anti-dilutive for purposes of LP’s earnings per share calculation due to LP’s loss position from continuing operations.
At June 30, 2013, outstanding warrants were exercisable to purchase approximately 2,924,770 shares.