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Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income (loss)	$ (75.4)us-gaap_ProfitLoss	$ 177.1us-gaap_ProfitLoss	$ 28.8us-gaap_ProfitLoss
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment	(14.5)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	(11.6)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0.6us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Unrealized gain (losses) on derivative financial instruments	0us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	0.3us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	(0.7)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
Unrealized gain (losses) on securities, net of reversals	0.6us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1.0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0.8us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
Defined benefit pension and post retirement plans:
Amortization of prior service cost	0us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	0.2us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	0.2us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, Net of Tax	(6.1)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	4.6us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	5.4us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax
Amortization of net actuarial loss	5.5us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses	7.3us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses	6.6us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses
Net gain (loss)	(26.7)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	23.0us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	(8.1)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
Amortization of net loss	3.9us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	4.7us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	4.2us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
Pension settlement	0us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	0us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	1.3us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
Exchange gain (loss) on remeasurement	0.7lpx_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansForeignExchangeRateChangesNetOfTax	1.1lpx_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansForeignExchangeRateChangesNetOfTax	0lpx_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansForeignExchangeRateChangesNetOfTax
Other comprehensive income (loss), net of tax	(42.1)lpx_OtherComprehensiveIncomeLossNetOfTaxIncludingRedeemableNonControllingInterest	18.7lpx_OtherComprehensiveIncomeLossNetOfTaxIncludingRedeemableNonControllingInterest	(1.7)lpx_OtherComprehensiveIncomeLossNetOfTaxIncludingRedeemableNonControllingInterest
Comprehensive income (loss)	$ (117.5)us-gaap_ComprehensiveIncomeNetOfTax	$ 195.8us-gaap_ComprehensiveIncomeNetOfTax	$ 27.1us-gaap_ComprehensiveIncomeNetOfTax

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Other comprehensive income loss net of tax, including redeemable non controlling interest.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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