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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 | 6,937,000 lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber |  | 8,475,000 lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber | 8,315,000 lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber |
Options / SSARs granted | 494,000 lpx_StockGrantedDuringPeriodSharesStockOptionsAndSsarsGranted |  | 343,000 lpx_StockGrantedDuringPeriodSharesStockOptionsAndSsarsGranted | 971,000 lpx_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 | 7,004,000 lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber |  | 6,937,000 lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber | 8,475,000 lpx_SharesBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingNumber |
Options / SSARs outstanding Weighted Average Exercise Price | $ 14.19 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingWeightedAverageExercisePrice |  | $ 14.26 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingWeightedAverageExercisePrice | $ 12.88 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingWeightedAverageExercisePrice | $ 12.78 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingWeightedAverageExercisePrice
SSARs granted Weighted Average Exercise Price | $ 18.09 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardSsarsGrantsInPeriodWeightedAverageExercisePrice |  | $ 20.49 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardSsarsGrantsInPeriodWeightedAverageExercisePrice | $ 8.85 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardSsarsGrantsInPeriodWeightedAverageExercisePrice |
Options / SSARs exercised Weighted Average Exercise Price | $ 9.92 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisesInPeriodWeightedAverageExercisePrice |  | $ 9.06 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisesInPeriodWeightedAverageExercisePrice | $ 6.24 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisesInPeriodWeightedAverageExercisePrice |
Options / SSARs cancelled Weighted Average Exercise Price | $ 21.14 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice |  | $ 22.23 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice | $ 16.69 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice |
Options / SSARs outstanding Weighted Average Contractual Term (in years) | 4.5 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisableWeightedAverageRemainingContractualTerm |  |  |  |
Options / SSARs outstanding Aggregate Intrinsic Value (in millions) | $ 32.6 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsOutstandingIntrinsicValue |  |  |  |
Vested and expected to vest | 6,654,000 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsVestedAndExpectedToVestOutstandingNumber | [1] |  |  |
Vested and expected to vest Aggregate Intrinsic Value (in millions) | 30.9 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue | [1] |  |  |
Options / SSARs exercisable | 6,019,000 lpx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndSsarsExercisableNumber |  |  |  |
Options / SSARs exercisable Weighted Average Exercise Price | $ 13.91 lpx_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) | 30.3 lpx_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 | 3.0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  | 2.7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 2.3 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
Unrecognized compensation costs | 3.5 us-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 | 3.8 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = lpx_OptionsAndSsarsMember |  | 3.4 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = lpx_OptionsAndSsarsMember | 3.7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = lpx_OptionsAndSsarsMember |
Unrecognized compensation costs | $ 4.4 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = lpx_OptionsAndSsarsMember |  |  |  |
Shares available under stock award plans | 5,200,000 us-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

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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