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Stock-Based Compensation Outstanding Options and SSARs (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
years
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]        
Beginning balance 6,937,000lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber 8,475,000lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber 8,315,000lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber  
Options / SSARs granted 494,000lpx_StockGrantedDuringPeriodSharesStockOptionsAndSsarsGranted 343,000lpx_StockGrantedDuringPeriodSharesStockOptionsAndSsarsGranted 971,000lpx_StockGrantedDuringPeriodSharesStockOptionsAndSsarsGranted  
Options / SSARs exercised (43,000)lpx_StockIssuedDuringPeriodSharesStockOptionsAndSsarsExercised (1,861,000)lpx_StockIssuedDuringPeriodSharesStockOptionsAndSsarsExercised (751,000)lpx_StockIssuedDuringPeriodSharesStockOptionsAndSsarsExercised  
Options / SSARs cancelled (384,000)lpx_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsAndSsarsForfeituresAndExpirationsInPeriod (20,000)lpx_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsAndSsarsForfeituresAndExpirationsInPeriod (60,000)lpx_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsAndSsarsForfeituresAndExpirationsInPeriod  
Ending balance 7,004,000lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber 6,937,000lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber 8,475,000lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber  
Options / SSARs outstanding Weighted Average Exercise Price $ 14.19lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingWeightedAverageExercisePrice $ 14.26lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingWeightedAverageExercisePrice $ 12.88lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingWeightedAverageExercisePrice $ 12.78lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingWeightedAverageExercisePrice
SSARs granted Weighted Average Exercise Price $ 18.09lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardSsarsGrantsInPeriodWeightedAverageExercisePrice $ 20.49lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardSsarsGrantsInPeriodWeightedAverageExercisePrice $ 8.85lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardSsarsGrantsInPeriodWeightedAverageExercisePrice  
Options / SSARs exercised Weighted Average Exercise Price $ 9.92lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisesInPeriodWeightedAverageExercisePrice $ 9.06lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisesInPeriodWeightedAverageExercisePrice $ 6.24lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisesInPeriodWeightedAverageExercisePrice  
Options / SSARs cancelled Weighted Average Exercise Price $ 21.14lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice $ 22.23lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice $ 16.69lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice  
Options / SSARs outstanding Weighted Average Contractual Term (in years) 4.5lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisableWeightedAverageRemainingContractualTerm      
Options / SSARs outstanding Aggregate Intrinsic Value (in millions) $ 32.6lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingIntrinsicValue      
Vested and expected to vest 6,654,000lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsVestedAndExpectedToVestOutstandingNumber [1]      
Vested and expected to vest Aggregate Intrinsic Value (in millions) 30.9lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue [1]      
Options / SSARs exercisable 6,019,000lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisableNumber      
Options / SSARs exercisable Weighted Average Exercise Price $ 13.91lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisableWeightedAverageExercisePrice      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 3 years 10 months 21 days      
Options / SSARs exercisable Aggregate Intrinsic Value (in millions) 30.3lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisableIntrinsicValue      
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]        
Weighted-average period of years costs are expected to be recognied over 1 year 0 months 4 days      
Allocated Share-based Compensation Expense 3.0us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		 2.7us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		 2.3us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		  
Unrecognized compensation costs 3.5us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		      
Options and Ssars [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]        
Allocated Share-based Compensation Expense 3.8us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= lpx_OptionsAndSsarsMember		 3.4us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= lpx_OptionsAndSsarsMember		 3.7us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= lpx_OptionsAndSsarsMember		  
Unrecognized compensation costs $ 4.4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= lpx_OptionsAndSsarsMember		      
Shares available under stock award plans 5,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= lpx_OptionsAndSsarsMember		      
Options and Ssars [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]        
Weighted-average period of years costs are expected to be recognied over 1 year 3 months 11 days      
[1] Options or SSARS expected to vest based upon historical forfeiture rate