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v2.4.1.9

Segment Information Additional Information (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |
Product Warranty Accrual, Period Increase (Decrease) |  |  | $ 11.3 us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease | $ 17.7 us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease | $ (1.8)us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease
Gain on settlement of litigation related to ARS |  |  | 0 us-gaap_GainLossRelatedToLitigationSettlement | 0 us-gaap_GainLossRelatedToLitigationSettlement | 20.0 us-gaap_GainLossRelatedToLitigationSettlement
Adjustments related to prior year inventory | 4.8 us-gaap_InventoryWriteDown | 1.6 us-gaap_InventoryWriteDown | 0 us-gaap_InventoryWriteDown | 4.8 us-gaap_InventoryWriteDown | 0 us-gaap_InventoryWriteDown
Adjustments to retirement accounts |  |  | 0 us-gaap_PensionAndOtherPostretirementBenefitExpense | 0 us-gaap_PensionAndOtherPostretirementBenefitExpense | 3.8 us-gaap_PensionAndOtherPostretirementBenefitExpense
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments |  |  | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments | 0 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments | 2.2 us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments
Termination indemnities in South America |  |  |  | 1.6 us-gaap_OtherPostretirementBenefitExpense |
Reductions, net of additions, to product related contingency reserves |  |  | 0 us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease | 0 us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease | (5.0)us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease
Reserves For Timber Obligations |  |  | 0 lpx_ReservesForTimberObligations | 0 lpx_ReservesForTimberObligations | 0.8 lpx_ReservesForTimberObligations
Addition to environmental related contingency reserves |  |  | (0.5)us-gaap_AccrualForEnvironmentalLossContingenciesProvisionForNewLosses | (1.0)us-gaap_AccrualForEnvironmentalLossContingenciesProvisionForNewLosses | 0 us-gaap_AccrualForEnvironmentalLossContingenciesProvisionForNewLosses
Fair Value, Inputs, Level 2 |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Impairment of Long-Lived Assets to be Disposed of |  |  |  | 4.4 us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueInputsLevel2Member |
Supplemental employee retirement plans, defined benefit |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments |  |  |  | (2.2)us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments / us-gaap_StatementScenarioAxis = us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember |
Siding |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Product Warranty Accrual, Period Increase (Decrease) |  |  |  | $ 1.0 us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease / us-gaap_ProductOrServiceAxis = lpx_SidingMember |

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- Definition Gain for Reductions in Reserves Associated With Canadian Timber Obligations + References No definition available. + Details
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- Definition The amount added to the accrual for newly incurred environmental loss contingencies. These additions include remediation expense and interest accretion. These additions do not relate to changes in the environmental accrual related to a business acquisition or divestiture, to currency movements, or revisions in previously existing estimates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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- Definition The amount of net gain (loss) recognized in net periodic benefit cost as a result of an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Curtailment -URI http://asc.fasb.org/extlink&oid=6520938 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 + Details
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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: 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=25496072&loc=d3e14326-108349 + 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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- Definition Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28360613&loc=d3e4542-108314 + Details
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- Definition Amount of increase (decrease) in loss contingency liability. + References Reference 1: 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=25496072&loc=d3e14326-108349 + Details
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- Definition The amount of costs recognized during the period for non-pension postretirement benefits, such as medical, dental and life insurance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -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 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (q) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -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 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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- Definition Total increases or decreases in the standard and extended product warranty liability during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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