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Contingency Reserves (Tables) | 9 Months Ended
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Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Loss Contingencies by Contingency [Table Text Block] | LP maintains reserves for various contingent liabilities as follows:
Dollar amounts in millions | September 30, 2012 |  | December 31, 2011
Environmental reserves | $ | 14.3 |  |  | $ | 15.0 |
Hardboard siding reserves | 5.8 |  |  | 6.2 |
Total contingency reserves | 20.1 |  |  | 21.2 |
Current portion of contingency reserves | (4.0 | ) |  | (4.0 | )
Long-term portion of contingency reserves | $ | 16.1 |  |  | $ | 17.2 |
Settlement Agreement Reserve Rollforward [Table Text Block] | The activity in the portion of LP's loss contingency reserves relating to hardboard siding contingencies for the first nine months of 2012 and 2011 are summarized in the following table.
Dollar amounts in millions | September 30, 2012 |  | September 30, 2011
Beginning balance, December 31, | $ | 6.2 |  |  | $ | 17.8 |
Reversal of reserves | — |  |  | (10.7 | )
Payments made for claims | (0.3 | ) |  | (0.4 | )
Payments made for administrative costs | (0.1 | ) |  | (0.3 | )
Ending balance | $ | 5.8 |  |  | $ | 6.4 |

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- Definition Tabular disclosure of the loss contingencies that were reported in the period or disclosed as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12021-110248 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14615-108349 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14557-108349 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9-12, 22-40 -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12053-110248 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14394-108349 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14472-108349 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14453-108349 + Details
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