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Gain (loss) on sales or impairment of long lived assets (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  | $ 0 us-gaap_AssetImpairmentCharges | $ (0.1)us-gaap_AssetImpairmentCharges | $ (4.4)us-gaap_AssetImpairmentCharges
Gain (Loss) on Sale of Property Plant Equipment | 0.6 us-gaap_GainLossOnSaleOfPropertyPlantEquipment | 3.7 us-gaap_GainLossOnSaleOfPropertyPlantEquipment |  |  |  |  |  |  | 3.1 us-gaap_GainLossOnSaleOfPropertyPlantEquipment | (0.1)us-gaap_GainLossOnSaleOfPropertyPlantEquipment | (0.5)us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Gain Loss On Sale Or Impairment Of Long Lived Assets, Net | (1.0)lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet | 3.6 lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet | 0.5 lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet | 0 lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet | (0.6)lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet | (0.3)lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet | 0.7 lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet | 0 lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet | 3.1 lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet | (0.2)lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet | (4.9)lpx_GainLossOnSaleOrImpairmentOfLongLivedAssetsNet
Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of Long-Lived Assets to be Disposed of |  |  |  |  |  |  |  |  |  | $ 4.4 us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueInputsLevel2Member |

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- Definition (Gain) Loss On Sale Or Impairment Of Long-Lived Assets, Net + References No definition available. + Details
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Details
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2611-110228 + Details
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