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Investments Investments sold (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014
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Gain (Loss) on Investments [Line Items] |
Par Value Available For Sale Securities | $ 23.4 lpx_ParValueAvailableForSaleSecurities

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- Definition Par Value Available For Sale Securities + References No definition available. + Details
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Namespace Prefix: | lpx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration