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v2.4.1.9

Fair Value Measurements Unobservable Inputs Rollforward (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Jun. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jun. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |
Contingent Consideration, Liability | $ 0 us-gaap_BusinessCombinationContingentConsiderationLiability |  | $ 2.1 us-gaap_BusinessCombinationContingentConsiderationLiability |  | $ 0 us-gaap_BusinessCombinationContingentConsiderationLiability | $ 2.1 us-gaap_BusinessCombinationContingentConsiderationLiability |  | $ 24.3 us-gaap_BusinessCombinationContingentConsiderationLiability
Adjustment to contingent consideration fair value | (3.3)lpx_Adjustmenttocontingentconsiderationfairvalue | 0.1 lpx_Adjustmenttocontingentconsiderationfairvalue | (3.2)lpx_Adjustmenttocontingentconsiderationfairvalue | (17.3)lpx_Adjustmenttocontingentconsiderationfairvalue | (3.2)lpx_Adjustmenttocontingentconsiderationfairvalue | (20.5)lpx_Adjustmenttocontingentconsiderationfairvalue | 0 lpx_Adjustmenttocontingentconsiderationfairvalue |
Foreign Currency Transaction Gain, before Tax |  |  |  |  | (0.4)us-gaap_ForeignCurrencyTransactionGainBeforeTax |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  | 3.7 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue | 2.0 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue |  |
Realized gains from the sale of investments |  |  |  |  | 0 us-gaap_RealizedInvestmentGainsLosses | 0 us-gaap_RealizedInvestmentGainsLosses |  |
Included in other comprehensive income |  |  |  |  | 0.9 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss | 1.7 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss |  |
Ending balance | 4.6 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue |  | 3.7 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue |  | 4.6 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue | 3.7 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue | 2.0 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue |
Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |
Contingent Consideration, Liability | 0.2 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |  | 3.8 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |  | 0.2 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 3.8 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |
Contingent Consideration, Liability | 0 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |  |  |  | 0 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |  |  |
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |
Contingent Consideration, Liability | 0 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |  |  |  | 0 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |  |  |
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |
Contingent Consideration, Liability | 0.2 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |  |  |  | 0.2 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |  |  |
Long-Term Liability [Member] |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |
Contingent Consideration, Liability | $ 0 us-gaap_BusinessCombinationContingentConsiderationLiability / lpx_ContingentConsiderationAxis = lpx_LongTermLiabilityMember |  |  |  | $ 0 us-gaap_BusinessCombinationContingentConsiderationLiability / lpx_ContingentConsiderationAxis = lpx_LongTermLiabilityMember |  |  | $ 24.3 us-gaap_BusinessCombinationContingentConsiderationLiability / lpx_ContingentConsiderationAxis = lpx_LongTermLiabilityMember

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- Definition Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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