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Earnings per Share | 3 Months Ended
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Mar. 31, 2012
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 losses from continuing operations are reported because the effect is anti-dilutive. 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,
2012 |  | 2011
Numerator: |  |  |
Loss attributed to LP common shares: |  |  |
Loss from continuing operations | $ | (11.2 | ) |  | $ | (23.0 | )
Loss from discontinued operations | (0.1 | ) |  | — |
Net loss | $ | (11.3 | ) |  | $ | (23.0 | )
Denominator: |  |  |
Basic - weighted average common shares outstanding | 136.6 |  |  | 131.3 |
Dilutive effect of stock warrants | — |  |  | — |
Dilutive effect of stock plans | — |  |  | — |
Diluted shares outstanding | 136.6 |  |  | 131.3 |
Basic earnings per share: |  |  |
Loss from continuing operations | $ | (0.08 | ) |  | $ | (0.18 | )
Loss from discontinued operations | — |  |  | — |
Net loss per share | $ | (0.08 | ) |  | $ | (0.18 | )
Diluted earnings per share: |  |  |
Loss from continuing operations | $ | (0.08 | ) |  | $ | (0.18 | )
Loss from discontinued operations | — |  |  | — |
Net loss per share | $ | (0.08 | ) |  | $ | (0.18 | )
For the three month periods ended March 31, 2012 and March 31, 2011, stock options, stock warrants and SSARs relating to approximately 7.4 million and 9.6 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.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=6945512&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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