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Long-term Debt (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2014
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
May 01, 2012
Notes and Loans Payable [Abstract]          
Other $ 0.8us-gaap_OtherLongTermDebt   $ 0.6us-gaap_OtherLongTermDebt    
Long-term debt 761.9us-gaap_LongTermDebt   765.0us-gaap_LongTermDebt    
Less: current portion 2.4us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths   2.3us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths    
Net long-term portion 759.5us-gaap_LongTermDebtNoncurrent   762.7us-gaap_LongTermDebtNoncurrent    
Senior unsecured note maturing 2020          
Notes and Loans Payable [Abstract]          
Debt, interest rate, stated percentage 7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lpx_SeniorSecureNoteMaturing2020Member
      7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lpx_SeniorSecureNoteMaturing2020Member
Notes payable 350.0us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= lpx_SeniorSecureNoteMaturing2020Member
  350.0us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= lpx_SeniorSecureNoteMaturing2020Member
   
Chilean term credit facility maturing 2019          
Notes and Loans Payable [Abstract]          
Debt, interest rate, stated percentage 3.90%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lpx_ChilianTermCreditFacilityMaturing2019Member
       
Notes payable 14.4us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= lpx_ChilianTermCreditFacilityMaturing2019Member
  15.7us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= lpx_ChilianTermCreditFacilityMaturing2019Member
   
Brazilian term credit facility maturing 2017          
Notes and Loans Payable [Abstract]          
Debt, interest rate, stated percentage 6.65%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lpx_BrazilianTermCreditFacilityMaturing2017Member
       
Notes payable 6.0us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= lpx_BrazilianTermCreditFacilityMaturing2017Member
  8.0us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= lpx_BrazilianTermCreditFacilityMaturing2017Member
   
Senior notes payable 2014 through 2019          
Notes and Loans Payable [Abstract]          
Notes payable 22.0us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= lpx_SeniorNotesPayable2013Thru2018Member
  22.0us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= lpx_SeniorNotesPayable2013Thru2018Member
   
Debt, interest rate, stated percentage, minimum 7.10%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_LongtermDebtTypeAxis
= lpx_SeniorNotesPayable2013Thru2018Member
       
Debt, interest rate, stated percentage, maximum 7.30%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
/ us-gaap_LongtermDebtTypeAxis
= lpx_SeniorNotesPayable2013Thru2018Member
       
Non recourse notes payable 2018          
Notes and Loans Payable [Abstract]          
Debt, interest rate, stated percentage 0.20%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= lpx_NonRecourseNotesPayable2018Member
       
Notes payable 368.7us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= lpx_NonRecourseNotesPayable2018Member
  368.7us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= lpx_NonRecourseNotesPayable2018Member
   
Deferred loss on early debt extinguishment          
Debt Instrument [Line Items]          
Amortization of Financing Costs and Discounts   $ 4.5us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_DebtInstrumentAxis
= us-gaap_DeferredLossOnEarlyExtinguishmentOfDebtMember
$ 1.4us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_DebtInstrumentAxis
= us-gaap_DeferredLossOnEarlyExtinguishmentOfDebtMember
$ 4.5us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_DebtInstrumentAxis
= us-gaap_DeferredLossOnEarlyExtinguishmentOfDebtMember