Louisiana-Pacific (LPX) 10-Q 5 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015
Entity Information [Line Items]
Entity Registrant Name	LOUISIANA-PACIFIC CORP
Entity Central Index Key	60519
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding	142,451,115

Consolidated_Statement_of_Inco

Consolidated Statement of Income (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net sales	$471.70	$444.70
Operating costs and expenses:
Cost of sales	427.8	388.4
Depreciation and amortization	26.7	25.6
Selling and administrative	38.7	40.9
(Gain) loss on sale or impairment of long-lived assets, net	0.1	0
Other operating charges and credits, net	11.6	0
Total operating costs and expenses	504.9	454.9
Loss from operations	-33.2	-10.2
Non-operating income (expense):
Interest expense, net of capitalized interest	-7.5	-7.7
Interest income	1.4	1.8
Other non-operating items	-2.2	-4.3
Total non-operating income (expense)	-8.3	-10.2
Loss from operations before taxes and equity in income of unconsolidated affiliates	-41.5	-20.4
Benefit for income taxes	-6.3	-5.6
Equity in income of unconsolidated affiliates	-0.7	-0.6
Net loss	($34.50)	($14.20)
Loss per share of common stock (basic and diluted):
Net loss per share	($0.24)	($0.10)
Average shares of stock outstanding - basic and diluted	142	140.8

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net loss	($34.50)	($14.20)
Other comprehensive loss
Foreign currency translation adjustments	-7.8	-1.8
Unrealized gain on marketable securities	0	0.1
Defined benefit pension plans	1.6	1.3
Other	0.1	0
Other comprehensive loss, net of tax	-6.1	-0.4
Comprehensive loss	($40.60)	($14.60)

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
ASSETS
Cash and cash equivalents	$468.30	$532.70
Receivables, net of allowance for doubtful accounts of $1.0 million at March 31, 2015 and December 31, 2014	137.2	108.4
Inventories	262.1	229.8
Prepaid expenses and other current assets	22.8	25
Deferred income taxes	29.1	45.1
Assets Held For Sale	9.3	9.3
Total current assets	928.8	950.3
Timber and timberlands	54.1	67.1
Property, plant and equipment, at cost	2,313.30	2,315.10
Accumulated depreciation	-1,483	-1,464.40
Net property, plant and equipment	830.3	850.7
Goodwill	9.7	9.7
Notes receivable from asset sales	432.2	432.2
Investments in and Advance to Affiliates	5.7	5
Deferred Finance Costs, Noncurrent, Net	5.3	5.6
Long-term Investments	4.6	4.6
Restricted cash	10.4	10.4
Other assets	17.3	17.3
Long-term deferred tax asset	0.6	0.6
Total assets	2,299	2,353.50
LIABILITIES AND EQUITY
Current portion of long-term debt	2.2	2.4
Accounts payable and accrued liabilities	182.4	168.3
Current portion of contingency reserves	2	2
Total current liabilities	186.6	172.7
Long-term debt, excluding current portion	757.9	759.5
Deferred income taxes	119.2	139.5
Contingency reserves, excluding current portion	12.6	12.2
Other long-term liabilities	147.6	153.8
Stockholders' equity:
Common stock	152.8	152.8
Additional paid-in capital	501.5	507
Retained earnings	777.8	812.3
Treasury stock	-219.6	-225
Accumulated comprehensive loss	-137.4	-131.3
Total stockholders' equity	1,075.10	1,115.80
Total liabilities and stockholders' equity	$2,299	$2,353.50

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Allowance for doubtful accounts	$1	$1

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	($34.50)	($14.20)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	26.7	25.6
Income from unconsolidated affiliates	-0.7	-0.6
(Gain) loss on sale or impairment of long-lived assets, net	0.1	0
Other operating charges and credits, net	11.6	0
Stock-based compensation related to stock plans	2.4	2.1
Exchange loss on remeasurement	3.6	5.2
Cash settlement of contingencies, net of accruals	0.5	-0.5
Cash settlements of warranties, net of accruals	-3	-2.7
Pension expense, net of contributions	2	0.6
Non-cash interest expense, net	-0.1	0.5
Other adjustments, net	0.3	-0.2
Increase in receivables	-30.9	-64.4
Increase in inventories	-34.2	-51.3
Decrease in prepaid expenses and other current assets	2	2.5
Increase in accounts payable and accrued liabilities	17.2	32.4
Decrease in deferred income taxes	-7	-8
Net cash provided by operating activities	-44	-73
CASH FLOWS FROM INVESTING ACTIVITIES:
Property, plant, and equipment additions	-14.9	-24
Proceeds from sales of assets	0.4	0.1
Increase in restricted cash under letters of credit/credit facility	0	-0.2
Net cash used in investing activities	-14.5	-24.1
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of long-term debt	-1.4	-1.1
Sale of common stock under equity plans	0.1	0
Taxes paid related to net share settlement of equity awards	-2.4	-1.4
Net cash used in financing activities	-3.7	-2.5
EFFECT OF EXCHANGE RATE ON CASH AND CASH EQUIVALENTS	-2.2	-5.5
Net decrease in cash and cash equivalents	-64.4	-105.1
Cash and cash equivalents at beginning of period	532.7	656.8
Cash and cash equivalents at end of period	$468.30	$551.70

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Comprehensive Loss
In Millions
Balance, Beginning Value, Shares at Dec. 31, 2014		152.8	10.6
Balance, Beginning Value at Dec. 31, 2014	$1,115.80	$152.80	($225)	$507	$812.30	($131.30)
Net loss	-34.5				-34.5
Issuance of shares for employee stock plans and stock based compensation	0.3		8.1	-7.8
Taxes paid related to net share settlement of equity awards			0.2
Taxes paid related to net share settlement of equity awards	-2.4		-2.7
Issuance of shares for employee stock plans and stock-based compensation			-0.4
Compensation expense associated with stock awards	2.3			2.3
Other comprehensive income (loss) net of tax including redeemable non controlling interest	-6.1
Other comprehensive loss	-6.1
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	2.7
Balance, Ending Value, Shares at Mar. 31, 2015		152.8	10.4
Balance, Ending Value at Mar. 31, 2015	$1,075.10	$152.80	($219.60)	$501.50	$777.80	($137.40)

Basis_For_Presentation

Basis For Presentation	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis for Presentation	BASIS FOR PRESENTATION
	The accompanying unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, in the opinion of management, include all adjustments (consisting of normal recurring adjustments) necessary to present fairly, in all material respects, the consolidated financial position, results of operations and cash flows of LP and its subsidiaries for the interim periods presented. Results of operations for interim periods are not necessarily indicative of results to be expected for an entire year. These consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in LP’s Annual Report on Form 10-K for the year ended December 31, 2014.

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION
	At March 31, 2015, LP had stock-based employee compensation plans as described below. The total compensation expense related to all of LP’s stock-based compensation plans was $2.4 million for the three months ended March 31, 2015 and $2.1 million for the three months ended March 31, 2014.
	Stock Compensation Plans
	LP grants options to purchase LP common stock and stock settled stock appreciation rights (SSARs) to key employees and directors. On exercise, LP generally issues shares from treasury to settle these awards. The options and SSARs are granted at market price at the date of grant. SSARs become exercisable ratably over a three year period and expire ten years after the date of grant. At March 31, 2015, 3.9 million shares were available under the current stock award plans for stock-based awards.
	The following table sets out the weighted average assumptions used to estimate the fair value of the options and SSARs granted using the Black-Scholes option-pricing model in the first three months of the respective years noted:
		2015		2014
	Expected stock price volatility	54.40%		57.50%
	Expected dividend yield	—%		—%
	Risk-free interest rate	1.50%		1.50%
	Expected life of options (in years)	6 years		5 years
	Weighted average fair value of options and SSARs granted	$8.80		$9.03
	The following table summarizes stock options and SSARs outstanding as of March 31, 2015, as well as activity during the three month period then ended.
	Share amounts in thousands	Options and			Weighted Average			Weighted	Aggregate
		SSARs			Exercise Price			Average	Intrinsic Value
								Contractual Term	(in millions)
								(in years)
	Options and SSARs outstanding at January 1, 2015	7,004			$	14.19
	Options and SSARs granted	379			17.04
	Options and SSARs exercised	(107	)		11.37
	Options and SSARs canceled	(267	)		26.5
	Options and SSARs outstanding at March 31, 2015	7,009			13.91			4.7	$	31.8
	Vested and expected to vest at March 31, 2015(1)	6,658			—			—	$	30.2
	Options and SSARs exercisable at March 31, 2015	6,204			$	13.44		4.1	$	31.6
	_______________
	(1)	Options and SSARS expected to vest based upon historical forfeiture rate
	The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between LP's closing stock price on the last trading day of the first three months of 2015 and the exercise price, multiplied by the number of in-the-money options and SSARs) that would have been received by the holders had all holders exercised their awards on March 31, 2015. This amount changes based on the market value of LP's stock as reported by the New York Stock Exchange.
	As of March 31, 2015, there was $6.7 million of total unrecognized compensation costs related to stock options and SSARs. These costs are expected to be recognized over a weighted-average period of 1.9 years. LP recorded compensation expense related to these awards in the first three months of 2015 of $0.9 million.
	Incentive Share Awards
	LP has granted incentive share stock awards (restricted stock units) to certain key employees and directors. The employee awards vest three years from date of grant and awards to directors vest one year from date of grant. The awards entitle the participant to receive a specified number of shares of LP common stock at no cost to the participant. The market value at the time of grant approximates the fair value. LP recorded compensation expense related to these awards in the first three months of 2015 of $0.8 million. As of March 31, 2015, there was $6.5 million of total unrecognized compensation cost related to unvested incentive share awards. This expense will be recognized over a weighted-average period of 1.8 years.
	The following table summarizes incentive share awards outstanding as of March 31, 2015 as well as activity during the three months then ended.
		Shares			Weighted		Aggregate
					Average		Intrinsic Value
					Contractual Term		(in millions)
					(in years)
	Incentive share awards outstanding at January 1, 2015	593,613
	Incentive share awards granted	217,110
	Incentive share awards vested	(231,700	)
	Incentive share awards canceled	(5,315	)
	Incentive shares outstanding at March 31, 2015	573,708			1.8		$	9.5
	Vested and expected to vest at March 31, 2015(1)	545,023			—		$	9
	_______________
	(1)	Incentive shares expected to vest based upon historical forfeiture rate
	Restricted Stock
	LP grants restricted stock to certain senior executive employees. The shares vest three years from the date of grant. During the vesting period, the participants have voting rights and receive dividends, but the shares may not be sold, assigned, transferred, pledged or otherwise encumbered. Additionally, granted but unvested shares are forfeited upon termination of employment. The fair value of the restricted shares on the date of the grant is amortized ratably over the vesting period which is generally three years. As of March 31, 2015, there was $3.1 million of total unrecognized compensation costs related to restricted stock. This expense will be recognized over the next 1.5 years.
	The following table summarizes the restricted stock outstanding as of March 31, 2015 as well as activity during the three months then ended.
		Number of Shares			Weighted Average
					Grant Date
					Fair Value
	Restricted stock awards outstanding at January 1, 2015	453,146			$	13.93
	Restricted stock awards granted	69,744			17.04
	Restrictions lapsing	(170,064	)		8.83
	Restricted stock canceled	(14,544	)		19.29
	Restricted stock awards at March 31, 2015	338,282			16.9
	Compensation expense related to these awards recognized in the first three months of 2015 was $0.5 million.
	Performance share awards
	In connection with Mr. Stevens' appointment to Chief Executive Officer on May 4, 2012, he was awarded 300,000 performance shares. LP recorded compensation expense related to these awards of $0.1 million in the first three months of 2015. As of March 31, 2015, there was $0.4 million of total unrecognized compensation costs related to this award. This expense will be recognized over the next 1.1 years.
	In 2015, LP awarded performance shares to certain key employees. These performance shares are earned based upon LP attaining specified revenue growth rates associated with its SmartSide products as compared to the prior year and LP's overall revenue growth as compared to a predetermined peer group, in each case for 2015. The performance period is measured over 2015 with a subsequent two year vesting period. LP recorded compensation expense related to these awards of $0.2 million in the first three months of 2015. As of March 31, 2015, there was $1.6 million of total unrecognized compensation costs related to this award. This expense will be recognized over the next 2.75 years
	Phantom stock
	During 2011 and 2012, LP made annual grants of phantom stock units to its directors. Subsequent to the approval of the 2013 Omnibus Plan, phantom stock units are no longer granted to directors. Holders of phantom stock units do not receive rights of a shareholder, nor is any stock transfered. The units will be paid out in cash at the end of the five year vesting period. The value of one unit is based on the market value of one share of common stock on the vesting date. The expense associated with these grants is recognized over the vesting period and is included in stock-based compensation expense. Since these awards are settled in cash, such awards are required to be remeasured based upon the changes in LP's stock price. As of March 31, 2015, LP had 66,339 shares outstanding under this program.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS
	LP’s investments that are measured at fair value on a recurring basis are categorized below using the fair value hierarchy. LP also measures the contingent consideration associated with the business combination using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 refers to fair values determined based on quoted prices in active markets for identical assets. Level 2 refers to fair values estimated using significant other observable inputs and Level 3 includes fair values estimated using significant non-observable inputs.
	The following table summarizes assets and liabilities measured on a recurring basis for each of the three hierarchy levels presented below.
	Dollar amounts in millions	March 31, 2015			Quoted Prices		Significant		Significant
					in Active		Other		Unobservable
					Markets for		Observable		Inputs
					Identical		Inputs		(Level 3)
					Assets		(Level 2)
					(Level 1)
	Available for sale securities	$	4.6		$	—	$	—	$	4.6
	Trading securities	2.4			2.4		—		—
	Contingent consideration	0.2			—		—		0.2
	Dollar amounts in millions	December 31, 2014			Quoted Prices		Significant		Significant
					in Active		Other		Unobservable
					Markets for		Observable		Inputs
					Identical		Inputs		(Level 3)
					Assets		(Level 2)
					(Level 1)
	Available for sale securities	$	4.6		$	—	$	—	$	4.6
	Trading securities	2.3			2.3		—		—
	Contingent consideration	0.2			—		—		0.2
	Due to the lack of observable market quotations on a portion of LP’s auction rate securities (ARS) portfolio, LP evaluates the structure of its ARS holdings and current market estimates of fair value, including fair value estimates from issuing banks that rely exclusively on Level 3 inputs. These inputs include those that are based on expected cash flow streams and collateral values, including assessments of counterparty credit quality, default risk underlying the security, discount rates and overall capital market liquidity. The valuation of LP’s ARS investment portfolio is subject to uncertainties that are difficult to predict. Factors that may impact LP’s valuation include changes to credit ratings of the securities as well as to the underlying assets supporting those securities, rates of default of the underlying assets, underlying collateral value, discount rates, counterparty risk and ongoing strength and quality of market credit and liquidity.
	The following table summarizes changes in assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the three months ended March 31, 2014. During the three months ended March 31, 2015, no adjustment was recognized associated with the fair value of these assets and liabilities.
	Dollar amounts in millions	Available for		Contingent consideration
		sale securities
	Balance at December 31, 2013	3.7		3.8
	Total unrealized gains included in other comprehensive income	0.1		—
	Foreign currency gain	—		(0.2		)
	Balance at March 31, 2014	$	3.8	$	3.6
	LP estimated the Senior Notes maturing in 2020 to have a fair value of $376.3 million at March 31, 2015 and $371.0 million at December 31, 2014 based upon market quotations.
	Carrying amounts reported on the balance sheet for cash, cash equivalents, receivables and accounts payable approximate fair value due to the short-term maturity of these items.

Earnings_per_Share

Earnings per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings per Share	EARNINGS PER SHARE
	Basic earnings per share are based on the weighted-average number of shares of common stock outstanding. Diluted earnings per share are based upon the weighted-average number of shares of common stock outstanding plus all potentially dilutive securities that were assumed to be converted into common shares at the beginning of the period under the treasury stock method. This method requires that the effect of potentially dilutive common stock equivalents (stock options, stock settled stock appreciation rights, performance shares, incentive shares and warrants) be excluded from the calculation of diluted earnings per share for the periods in which LP recognizes losses from continuing operations or at such time that the exercise prices of such awards are in excess of the weighted average market price of LP's common stock during these periods because the effect is anti-dilutive.
	For the three months ended March 31, 2015 and March 31, 2014, stock options, warrants and SSARs relating to approximately 5.2 million and 3.6 million shares of LP common stock were considered anti-dilutive for purposes of LP's earnings per share calculation due to LP's loss position from continuing operations.
	At March 31, 2015, outstanding warrants were exercisable to purchase approximately 573,521 shares.

Receivables

Receivables	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Receivables	RECEIVABLES
	Receivables consist of the following:
	Dollar amounts in millions	March 31, 2015			December 31, 2014
	Trade receivables	$	126.4		$	96.1
	Interest receivables	0.6			0.2
	Income tax receivable	1.6			1.4
	Other receivables	9.6			11.7
	Allowance for doubtful accounts	(1.0		)	(1.0		)
	Total	$	137.2		$	108.4
	Other receivables at March 31, 2015 and December 31, 2014 primarily consist of sales and other value-added tax receivables, vendor rebates, receivable from former partner and other miscellaneous receivables.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2015
Inventory Disclosure [Abstract]
Inventories	INVENTORIES
	Inventories are valued at the lower of cost or market. Inventory cost includes materials, labor and operating overhead. The major types of inventories are as follows (work in process is not material):
	Dollar amounts in millions	March 31, 2015		December 31, 2014
	Logs	$	70.8	$	39.6
	Other raw materials	19.2		21.3
	Semi finished inventory	20.5		19.3
	Finished products	151.6		149.6
	Total	$	262.1	$	229.8

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES
	Accounting standards state that companies account for income taxes using the asset and liability approach, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the carrying amounts and the tax basis of assets and liabilities. This method also requires the recognition of future tax benefits, such as net operating loss carryforwards and other tax credits. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to reverse. Valuation allowances are recorded as necessary to reduce deferred tax assets to the amount thereof that is more likely than not to be realized. The likelihood of realizing deferred tax assets is evaluated by, among other things, estimating future taxable income, considering the future reversal of existing deferred tax liabilities to which the deferred tax assets may be applied and assessing the impact of tax planning strategies.
	For interim periods, accounting standards require that income tax expense be determined by applying the estimated annual effective income tax rate to year-to-date results unless this method does not result in a reliable estimate of year-to-date income tax expense.  An exception is provided for situations in which an enterprise anticipates a loss in a separate jurisdiction for which no tax benefit can be recognized. For the first quarter of 2015, LP's overall estimated annual effective tax rate is computed by excluding anticipated losses in Canada for which no deferred tax asset is expected to be recognizable due to the need for Valuation Allowances. Tax benefit for the quarter is then computed using the rate so derived applied to year-to-date pre-tax losses excluding those from Canada, and no additional Canadian tax benefit is added.
	Each quarter the income tax accrual is adjusted to the latest estimate and the difference from the previously accrued year-to-date balance is adjusted to the current quarter. Changes in the profitability estimates in various jurisdictions will impact our quarterly effective income tax rates.
	For the first three months of 2015, the primary differences between the U.S. statutory rate of 35% and the effective rate of 15% relates to state income taxes, Canadian valuation allowances and a reduction in the reserve for uncertain tax positions. For the first three months of 2014, the primary differences between the U.S. statutory rate of 35% and the effective rate of 28% relates to the effect of foreign tax rates and adjustments to reserves for uncertain tax positions.
	LP periodically reviews the need for valuation allowances against deferred tax assets and recognizes these deferred tax assets to the extent that the realization is more likely than not. As part of our review, we consider all positive and negative evidence, including earnings history, the future reversal of deferred tax liabilities, and the relevant expirations of carry forwards. LP believes that the valuation allowances provided are appropriate. If future years' earnings differ from the estimates used to establish these valuation allowances or other objective positive or negative evidence arises, LP may be required to record an adjustment resulting in an impact on tax expense (benefit) for that period.
	As a result of certain recognition requirements of ASC 718 Compensation -- Stock Compensation, certain deferred tax assets as of March 31, 2015 are not recognized in relation to amounts of tax deductions for equity compensation that are greater than the compensation expense recognized for financial reporting. Equity will be increased by $13.9 million if and when such deferred tax assets are ultimately realized. LP uses the "with and without" method for determining when excess tax benefits have been realized.
	LP and its domestic subsidiaries are subject to U.S. federal income tax as well as income taxes of multiple state jurisdictions. Its foreign subsidiaries are subject to income tax in Canada, Chile, Peru and Brazil. During 2011, the U.S. Internal Revenue Service initiated an audit of tax years 2007 through 2009. LP protested certain proposed adjustments and requested review by the IRS Appeals Office. In the fourth quarter of 2014, the IRS Appeals conferences were completed and a tentative agreement was reached resolving all issues. The agreed upon changes are subject to approval by U.S. Joint Committee on Taxation which is expected to occur in 2015. During 2013, LP deposited $17.1 million with the IRS to suspend the accrual of interest pending the resolution of this matter. The deposit is included within Prepaid and other current assets on the Condensed Consolidated Balance Sheet at March 31, 2015.
	LP remains subject to U.S. federal examinations of tax years 2011 through 2013, as well as state and local tax examinations for the tax years 2007- 2013. Canadian federal income tax years are closed through 2009 and no examinations are currently in progress. Quebec provincial audits have been effectively settled through 2012. Chilean returns for years 2010 - 2012 tax years are under review by the Chilean Tax Office. Brazilian returns for years 2009 - 2013 are subject to audit, but no examinations are currently in progress.

Other_Operating_Credits_and_Ch

Other Operating Credits and Charges, Net	3 Months Ended
	Mar. 31, 2015
Other Operating Credits And Charges, Net [Abstract]
Other Operating Credits and Charges Net [Table Text Block]	OTHER OPERATING CHARGES AND CREDITS
	During the first quarter of 2015, LP was notified by the Ministry of Forestry in Quebec that LP’s forest license associated with an indefinitely curtailed OSB mill in Quebec has been terminated. Based upon this notification, LP was required to write off the remaining unamortized value associated with this intangible forest license of $11.6 million.

Transactions_with_Affiliates

Transactions with Affiliates	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Transactions with Affiliates	TRANSACTIONS WITH AFFILIATES
	LP has an equity investment in Abitibi-LP, a manufacturer of I-joists with Resolute Forest Products. LP sells products and raw materials to Abitibi-LP and purchases products for resale from Abitibi-LP. LP eliminates profits on these sales and purchases, to the extent the inventory has not been sold through to third parties, on the basis of its 50% interest. For the three months ended March 31, 2015 and 2014, LP sold $1.7 million and $2.5 million of products to Abitibi-LP and purchased $10.4 million and $12.2 million of I-joists from Abitibi-LP. Included in LP’s Consolidated Balance Sheets at March 31, 2015 and December 31, 2014 are $0.9 million and $0.7 million in accounts receivable and $0.4 million in accounts payable for both periods associated with Abitibi-LP.

Legal_and_Environmental_Matter

Legal and Environmental Matters	3 Months Ended
	Mar. 31, 2015
Legal and Environmental Matters [Abstract]
Legal and Environmental Matters	LEGAL AND ENVIRONMENTAL MATTERS
	Certain environmental matters and legal proceedings are discussed below.
	Environmental Matters
	LP maintains a reserve for undiscounted estimated environmental loss contingencies. This reserve is primarily for estimated future costs of remediation of hazardous or toxic substances at numerous sites currently or previously owned by the Company. LP’s estimates of its environmental loss contingencies are based on various assumptions and judgments, the specific nature of which varies in light of the particular facts and circumstances surrounding each environmental loss contingency. These estimates typically reflect assumptions and judgments as to the probable nature, magnitude and timing of required investigation, remediation and/or monitoring activities and the probable cost of these activities, and in some cases reflect assumptions and judgments as to the obligation or willingness and ability of third parties to bear a proportionate or allocated share of the cost of these activities. Due to the numerous uncertainties and variables associated with these assumptions and judgments, and the effects of changes in governmental regulation and environmental technologies, both the precision and reliability of the resulting estimates of the related contingencies are subject to substantial uncertainties. LP regularly monitors its estimated exposure to environmental loss contingencies and, as additional information becomes known, may change its estimates significantly. However, no estimate of the range of any such change can be made at this time.
	Other Proceedings
	LP and its subsidiaries are parties to other legal proceedings. Based on the information currently available, management believes that the resolution of such proceedings will not have a material adverse effect on the financial position, results of operations, cash flows or liquidity of LP.

Selected_Segment_Data

Selected Segment Data	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Selected Segment Data	SELECTED SEGMENT DATA
	LP operates in four segments: Oriented Strand Board (OSB), Siding, Engineered Wood Products (EWP) and South America. LP’s business units have been aggregated into these four segments based upon the similarity of economic characteristics, customers and distribution methods. LP’s results of operations are summarized below for each of these segments separately as well as for the “other” category which comprises other products that are not individually significant. Segment information was prepared in accordance with the same accounting principles as those described in Note 1 of the Notes to the financial statements included in LP’s Annual Report on Form 10-K for the year ended December 31, 2014.
		Three Months Ended March 31,
	Dollar amounts in millions	2015			2014
	Net sales:
	OSB	$	190.2		$	194.9
	Siding	173.5			143.5
	Engineered Wood Products	64.8			62.2
	South America	35.9			36.6
	Other	7.3			7.9
	Intersegment Sales	—			(0.4		)
		$	471.7		$	444.7
	Operating profit (loss):
	OSB	$	(28.4	)	$	(1.9	)
	Siding	32.9			19.2
	Engineered Wood Products	(4.1		)	(3.1		)
	South America	2.4			4.2
	Other	(0.9		)	(0.7		)
	Other operating charges and credits, net	(11.6		)	—
	Gain (loss) on sale or impairment of long-lived assets	(0.1		)	—
	General corporate and other expenses, net	(22.7		)	(27.3		)
	Other non-operating income (expense)	(2.2		)	(4.3		)
	Interest income	1.4			1.8
	Interest expense, net of capitalized interest	(7.5		)	(7.7		)
	Loss from operations before taxes	(40.8		)	(19.8		)
	Benefit for income taxes	(6.3		)	(5.6		)
	Net loss	$	(34.5	)	$	(14.2	)

Potential_Impairments

Potential Impairments	3 Months Ended
	Mar. 31, 2015
Asset Impairment Charges [Abstract]
Potential Impairments	POTENTIAL IMPAIRMENTS
	LP continues to review certain operations and investments for potential impairments. LP’s management currently believes it has adequate support for the carrying value of each of these operations and investments based upon the anticipated cash flows that result from estimates of future demand, pricing and production costs assuming certain levels of planned capital expenditures. As of March 31, 2015, there was an indication of impairment associated with the company's indefinitely curtailed OSB facility in Quebec, Canada. See Note 9 for discussion of the write off of the timber license associated with this facility. LP is currently evaluating various options associated with this mill. Based upon the weighted probability of the future cash flows associated with various options for this facility, no impairment was required. If the weighting of the probabilities changes or the projected cash flow changes from those included in the calculation, LP may be required to record impairments in the future. As of March 31, 2015, the fair value of facilities that have not been indefinitely curtailed are substantially in excess of its carrying value and supports the conclusion that no impairment is necessary for those facilities.
	LP also reviews from time to time possible dispositions of various assets in light of current and anticipated economic and industry conditions, its strategic plan and other relevant circumstances. Because a determination to dispose of particular assets can require management to make assumptions regarding the transaction structure of the disposition and to estimate the net sales proceeds, which may be less than previous estimates of undiscounted future net cash flows, LP may be required to record impairment charges in connection with decisions to dispose of assets.

Defined_Benefit_Pension_Plans

Defined Benefit Pension Plans	3 Months Ended
	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Compensation and Employee Benefit Plans	DEFINED BENEFIT PENSION PLANS
	The following table sets forth the net periodic pension cost for LP’s defined benefit pension plans during the three months ended March 31, 2015 and 2014. The net periodic pension cost included the following components:
		Three Months Ended March 31,
	Dollar amounts in millions	2015			2014
	Service cost	$	1		$	0.9
	Interest cost	3.4			3.7
	Expected return on plan assets	(3.8		)	(4.2		)
	Amortization of prior service cost	0.1			—
	Amortization of net loss	1.8			1.4
	Net periodic pension cost	$	2.5		$	1.8
	During the three months ended March 31, 2015 and 2014, LP recognized $2.5 million and $1.8 million of pension expense for all of LP's defined benefit pension plans.
	During the three months ended March 31, 2015, LP made $1.0 million in pension contributions to its defined benefit pension plans. LP expects to contribute between $2.0 million and $5.0 million to its defined benefit pension plans in 2015.

Guarantees_and_Indemnification

Guarantees and Indemnifications	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Guarantees and Indemnifications	GUARANTEES AND INDEMNIFICATIONS
	LP is a party to contracts in which LP agrees to indemnify third parties for certain liabilities that arise out of or relate to the subject matter of the contract. In some cases, this indemnity extends to liabilities arising out of the negligence of the indemnified parties, but usually excludes any liabilities caused by gross negligence or willful misconduct of the indemnified parties. LP cannot estimate the potential amount of future payments under these agreements until events arise that would trigger the liability. See Note 20 of the Notes to the financial statements included in LP’s Annual Report on Form 10-K for the year ended December 31, 2014 for further discussion of LP’s guarantees and indemnifications.
	LP provides warranties on the sale of most of its products and records an accrual for estimated future claims. Such accruals are based upon historical experience and management’s estimate of the level of future claims. The activity in warranty reserves for the three months of 2015 and 2014 are summarized in the following table:
		Three Months Ended March 31,
	Dollar amounts in millions	2015			2014
	Beginning balance	$	31.4		$	29.3
	Accrued to expense	0.1			0.2
	Foreign currency translation	(1.3		)	(0.4		)
	Payments made	(3.1		)	(2.9		)
	Total warranty reserves	27.1			26.2
	Current portion of warranty reserves	(12.0		)	(12.0		)
	Long-term portion of warranty reserves	$	15.1		$	14.2
	LP continues to monitor warranty and other claims associated with these products and believes as of March 31, 2015 that the reserves associated with these matters are adequate. However, it is possible that additional charges may be required in the future.
	The current portion of the warranty reserve is included in the caption “Accounts payable and accrued liabilities” and the long-term portion is included in the caption “Other long-term liabilities” on LP’s Consolidated Balance Sheets.

Other_Comprehensive_Income_Oth

Other Comprehensive Income Other Comprehensive Income	3 Months Ended
	Mar. 31, 2015
Other Comprehensive Income [Abstract]
Comprehensive Income (Loss) Note	OTHER COMPREHENSIVE INCOME
	Other comprehensive income activity, net of tax, is provided in the following table for the three months ended March 31, 2015:
	Dollar amounts in millions	Foreign currency translation adjustments			Pension adjustments			Unrealized gain (loss) on investments		Other			Total
	Balance at December 31, 2014	$	(33.7	)	$	(99.0	)	$	2.6	$	(1.2	)	$	(131.3	)
	Other comprehensive income before reclassifications	(7.8		)	0.5			—		0.1			(7.2		)
	Amounts reclassified from accumulated comprehensive income	—			1.1			—		—			1.1
	Net current-period other comprehensive income	(7.8		)	1.6			—		0.1			(6.1		)
	Balance at March 31, 2015	$	(41.5	)	$	(97.4	)	$	2.6	$	(1.1	)	$	(137.4	)
	Other comprehensive income activity, net of tax, is provided in the following table for the three months ended March 31, 2014:
	Dollar amounts in millions	Foreign currency translation adjustments			Pension adjustments			Unrealized gain (loss) on investments		Other			Total
	Balance at December 31, 2013	$	(19.2	)	$	(70.3	)	$	2	$	(1.7	)	$	(89.2	)
	Other comprehensive income (loss) before reclassifications	(1.8		)	2.6			0.1		—			0.9
	Amounts reclassified from accumulated comprehensive income	—			(1.3		)	—		—			(1.3		)
	Net current-period other comprehensive income (loss)	(1.8		)	1.3			0.1		—			(0.4		)
	Balance at March 31, 2014	$	(21.0	)	$	(69.0	)	$	2.1	$	(1.7	)	$	(89.6	)
	Reclassifications from accumulated other comprehensive loss for the three months ended March 31, 2015 and March 31, 2014 are summarized, in millions of dollars, in the following table:
		Amount reclassified from accumulated comprehensive loss
			Three Months Ended March 31,
	Details about accumulated other comprehensive income components		2015			2014			Affected line item in the statement where net income (loss) is presented
	Amortization of defined benefit pension plans
	Prior service cost		$	0.1		—			(a)
	Actuarial loss		1.8			1.4			(a)
	Transition obligation		—			0.4			(a)
			1.9			1.8			Total before tax
			0.8			0.5			Tax benefit
	Total reclassifications		$	1.1		$	1.3		Net of tax
	____________
	(a) These accumulated other comprehensive loss components are included in the computation of net periodic pension cost, see Note 12 for additional details. The net periodic pension cost is included in Cost of sales and Selling and administrative line items in the Consolidated Statements of Income.

Recent_and_Prospective_Account

Recent and Prospective Accounting Pronouncements (Notes)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	RECENT AND PROSPECTIVE ACCOUNTING PRONOUNCEMENTS
	In April 2015, the Financial Accounting Standard Board issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The amendments in this ASU require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. This guidance is effective for annual and interim reporting periods of public entities beginning after December 15, 2015, and early adoption is permitted. LP is currently evaluating the effect that adopting this new accounting guidance will have on its consolidated results of operations and financial position.

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The following table sets out the weighted average assumptions used to estimate the fair value of the options and SSARs granted using the Black-Scholes option-pricing model in the first three months of the respective years noted:
		2015		2014
	Expected stock price volatility	54.40%		57.50%
	Expected dividend yield	—%		—%
	Risk-free interest rate	1.50%		1.50%
	Expected life of options (in years)	6 years		5 years
	Weighted average fair value of options and SSARs granted	$8.80		$9.03
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity	The following table summarizes stock options and SSARs outstanding as of March 31, 2015, as well as activity during the three month period then ended.
	Share amounts in thousands	Options and			Weighted Average			Weighted	Aggregate
		SSARs			Exercise Price			Average	Intrinsic Value
								Contractual Term	(in millions)
								(in years)
	Options and SSARs outstanding at January 1, 2015	7,004			$	14.19
	Options and SSARs granted	379			17.04
	Options and SSARs exercised	(107	)		11.37
	Options and SSARs canceled	(267	)		26.5
	Options and SSARs outstanding at March 31, 2015	7,009			13.91			4.7	$	31.8
	Vested and expected to vest at March 31, 2015(1)	6,658			—			—	$	30.2
	Options and SSARs exercisable at March 31, 2015	6,204			$	13.44		4.1	$	31.6
Schedule of Share-based Compensation, Restricted Stock Units Award Activity	The following table summarizes incentive share awards outstanding as of March 31, 2015 as well as activity during the three months then ended.
		Shares			Weighted		Aggregate
					Average		Intrinsic Value
					Contractual Term		(in millions)
					(in years)
	Incentive share awards outstanding at January 1, 2015	593,613
	Incentive share awards granted	217,110
	Incentive share awards vested	(231,700	)
	Incentive share awards canceled	(5,315	)
	Incentive shares outstanding at March 31, 2015	573,708			1.8		$	9.5
	Vested and expected to vest at March 31, 2015(1)	545,023			—		$	9
Restricted Stock Activity [Table Text Block]	The following table summarizes the restricted stock outstanding as of March 31, 2015 as well as activity during the three months then ended.
		Number of Shares			Weighted Average
					Grant Date
					Fair Value
	Restricted stock awards outstanding at January 1, 2015	453,146			$	13.93
	Restricted stock awards granted	69,744			17.04
	Restrictions lapsing	(170,064	)		8.83
	Restricted stock canceled	(14,544	)		19.29
	Restricted stock awards at March 31, 2015	338,282			16.9

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value, Measurement Inputs, Disclosure [Table Text Block]	The following table summarizes assets and liabilities measured on a recurring basis for each of the three hierarchy levels presented below.
	Dollar amounts in millions	March 31, 2015			Quoted Prices		Significant		Significant
					in Active		Other		Unobservable
					Markets for		Observable		Inputs
					Identical		Inputs		(Level 3)
					Assets		(Level 2)
					(Level 1)
	Available for sale securities	$	4.6		$	—	$	—	$	4.6
	Trading securities	2.4			2.4		—		—
	Contingent consideration	0.2			—		—		0.2
	Dollar amounts in millions	December 31, 2014			Quoted Prices		Significant		Significant
					in Active		Other		Unobservable
					Markets for		Observable		Inputs
					Identical		Inputs		(Level 3)
					Assets		(Level 2)
					(Level 1)
	Available for sale securities	$	4.6		$	—	$	—	$	4.6
	Trading securities	2.3			2.3		—		—
	Contingent consideration	0.2			—		—		0.2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	The following table summarizes changes in assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the three months ended March 31, 2014. During the three months ended March 31, 2015, no adjustment was recognized associated with the fair value of these assets and liabilities.
	Dollar amounts in millions	Available for		Contingent consideration
		sale securities
	Balance at December 31, 2013	3.7		3.8
	Total unrealized gains included in other comprehensive income	0.1		—
	Foreign currency gain	—		(0.2		)
	Balance at March 31, 2014	$	3.8	$	3.6

Receivables_Tables

Receivables (Tables)	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	Receivables consist of the following:
	Dollar amounts in millions	March 31, 2015			December 31, 2014
	Trade receivables	$	126.4		$	96.1
	Interest receivables	0.6			0.2
	Income tax receivable	1.6			1.4
	Other receivables	9.6			11.7
	Allowance for doubtful accounts	(1.0		)	(1.0		)
	Total	$	137.2		$	108.4

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Mar. 31, 2015
Inventory Disclosure [Abstract]
Schedule of Inventory, Current [Table Text Block]	The major types of inventories are as follows (work in process is not material):
	Dollar amounts in millions	March 31, 2015		December 31, 2014
	Logs	$	70.8	$	39.6
	Other raw materials	19.2		21.3
	Semi finished inventory	20.5		19.3
	Finished products	151.6		149.6
	Total	$	262.1	$	229.8

Selected_Segment_Data_Tables

Selected Segment Data (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]
		Three Months Ended March 31,
	Dollar amounts in millions	2015			2014
	Net sales:
	OSB	$	190.2		$	194.9
	Siding	173.5			143.5
	Engineered Wood Products	64.8			62.2
	South America	35.9			36.6
	Other	7.3			7.9
	Intersegment Sales	—			(0.4		)
		$	471.7		$	444.7
	Operating profit (loss):
	OSB	$	(28.4	)	$	(1.9	)
	Siding	32.9			19.2
	Engineered Wood Products	(4.1		)	(3.1		)
	South America	2.4			4.2
	Other	(0.9		)	(0.7		)
	Other operating charges and credits, net	(11.6		)	—
	Gain (loss) on sale or impairment of long-lived assets	(0.1		)	—
	General corporate and other expenses, net	(22.7		)	(27.3		)
	Other non-operating income (expense)	(2.2		)	(4.3		)
	Interest income	1.4			1.8
	Interest expense, net of capitalized interest	(7.5		)	(7.7		)
	Loss from operations before taxes	(40.8		)	(19.8		)
	Benefit for income taxes	(6.3		)	(5.6		)
	Net loss	$	(34.5	)	$	(14.2	)

Defined_Benefit_Pension_Plans_

Defined Benefit Pension Plans (Tables)	3 Months Ended
	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	The net periodic pension cost included the following components:
		Three Months Ended March 31,
	Dollar amounts in millions	2015			2014
	Service cost	$	1		$	0.9
	Interest cost	3.4			3.7
	Expected return on plan assets	(3.8		)	(4.2		)
	Amortization of prior service cost	0.1			—
	Amortization of net loss	1.8			1.4
	Net periodic pension cost	$	2.5		$	1.8

Guarantees_and_Indemnification1

Guarantees and Indemnifications (Tables)	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Product Warranty Liability [Table Text Block]	The activity in warranty reserves for the three months of 2015 and 2014 are summarized in the following table:
		Three Months Ended March 31,
	Dollar amounts in millions	2015			2014
	Beginning balance	$	31.4		$	29.3
	Accrued to expense	0.1			0.2
	Foreign currency translation	(1.3		)	(0.4		)
	Payments made	(3.1		)	(2.9		)
	Total warranty reserves	27.1			26.2
	Current portion of warranty reserves	(12.0		)	(12.0		)
	Long-term portion of warranty reserves	$	15.1		$	14.2

Other_Comprehensive_Income_Oth1

Other Comprehensive Income Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2015															Mar. 31, 2014
Accumulated Other Comprehensive Income [Line Items]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Other comprehensive income activity, net of tax, is provided in the following table for the three months ended March 31, 2015:															Other comprehensive income activity, net of tax, is provided in the following table for the three months ended March 31, 2014:
	Dollar amounts in millions	Foreign currency translation adjustments			Pension adjustments			Unrealized gain (loss) on investments		Other			Total			Dollar amounts in millions	Foreign currency translation adjustments			Pension adjustments			Unrealized gain (loss) on investments		Other			Total
	Balance at December 31, 2014	$	(33.7	)	$	(99.0	)	$	2.6	$	(1.2	)	$	(131.3	)	Balance at December 31, 2013	$	(19.2	)	$	(70.3	)	$	2	$	(1.7	)	$	(89.2	)
	Other comprehensive income before reclassifications	(7.8		)	0.5			—		0.1			(7.2		)	Other comprehensive income (loss) before reclassifications	(1.8		)	2.6			0.1		—			0.9
	Amounts reclassified from accumulated comprehensive income	—			1.1			—		—			1.1			Amounts reclassified from accumulated comprehensive income	—			(1.3		)	—		—			(1.3		)
	Net current-period other comprehensive income	(7.8		)	1.6			—		0.1			(6.1		)	Net current-period other comprehensive income (loss)	(1.8		)	1.3			0.1		—			(0.4		)
	Balance at March 31, 2015	$	(41.5	)	$	(97.4	)	$	2.6	$	(1.1	)	$	(137.4	)	Balance at March 31, 2014	$	(21.0	)	$	(69.0	)	$	2.1	$	(1.7	)	$	(89.6	)
Disclosure of Reclassification Amount [Text Block]	Reclassifications from accumulated other comprehensive loss for the three months ended March 31, 2015 and March 31, 2014 are summarized, in millions of dollars, in the following table:
		Amount reclassified from accumulated comprehensive loss
			Three Months Ended March 31,
	Details about accumulated other comprehensive income components		2015			2014			Affected line item in the statement where net income (loss) is presented
	Amortization of defined benefit pension plans
	Prior service cost		$	0.1		—			(a)
	Actuarial loss		1.8			1.4			(a)
	Transition obligation		—			0.4			(a)
			1.9			1.8			Total before tax
			0.8			0.5			Tax benefit
	Total reclassifications		$	1.1		$	1.3		Net of tax
	____________
	(a) These accumulated other comprehensive loss components are included in the computation of net periodic pension cost, see Note 12 for additional details. The net periodic pension cost is included in Cost of sales and Selling and administrative line items in the Consolidated Statements of Income.

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
SSARS Expiration Date	P10Y
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	0.8
Unrecognized compensation costs	6.5
Weighted-average period of years costs are expected to be recognied over	1 year 9 months 18 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	1.6
Weighted-average period of years costs are expected to be recognied over	2 years 9 months
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	3 years
Director [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	3.1
Weighted-average period of years costs are expected to be recognied over	1 year 6 months
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	0.2
Chief Executive Officer [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	0.1
Chief Executive Officer [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	0.4
Weighted-average period of years costs are expected to be recognied over	1 year 1 month 6 days

StockBased_Compensation_Valuat

Stock-Based Compensation Valuation Assumptions (Details) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation related to stock plans	$2.40	$2.10
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	3 years
Options and SSARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected sock price volatility	54.40%	57.50%
Expected dividend yield	0.00%	0.00%
Risk-free interest rate	1.50%	1.50%
Expected life of options	6 years	5 years
Weighted average fair value of options and SSARs granted	$8.80	$9.03

StockBased_Compensation_Outsta

Stock-Based Compensation Outstanding Options and SSARs (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Options / SSARs outstanding at January 1, 2014	7,004,000
Incentive shares granted	379,000
Options / SSARs exercised	-107,000
Options / SSARs canceled	-267,000
Options / SSARs outstanding at September 30, 2014	7,009,000
Options / SSARs outstanding Weighted Average Exercise Price	$14.17	$14.19
Options / SSARs granted Weighted Average Exercise Price	$17.04
Options / SSARs exercised Weighted Average Exercise Price	$11.37
Options / SSARs canceled Weighted Average Exercise Price	$26.50
Options / SSARs outstanding Weighted Average Contractual Term (in years)	4 years 8 months 12 days
Options / SSARs outstanding Aggregate Intrinsic Value (in millions)	$31.80
Vested and expected to vest	6,658,000
Vested and expected to vest Aggregate Intrinsic Value (in millions)	30.2
Options / SSARs exercisable	6,204,000
Options / SSARs exercisable Weighted Average Exercise Price	$13.44
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	4 years 1 month 6 days
Options / SSARs exercisable Aggregate Intrinsic Value (in millions)	31.6
Options and SSARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Weighted-average period of years costs are expected to be recognied over	1 year 10 months 24 days
Compensation Expense	0.9
Unrecognized compensation costs	$6.70
Number of Shares Available for Grant	3,900,000
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Vesting Period	3 years

StockBased_Compensation_Restri

Stock-Based Compensation Restricted Stock Units (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive shares granted	379,000
Incentive shares ouststanding Aggregate Intrinsic Value (in millions)	$31.80
Director restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	0.5
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	6.5
Compensation Expense	0.8
Incentive share awards outstanding at January 1, 2014	593,613
Incentive shares granted	217,110
Incentive share awards vested	-231,700
Incentive share awards canceled	-5,315
Incentive shares outstanding at September 30, 2014	573,708
Incentive share awards outstanding Weighted Average Contractual Term (in years)	1 year 9 months 18 days
Incentive shares ouststanding Aggregate Intrinsic Value (in millions)	9.5
Vested and expected to vest at September 30, 2014	545,000
Vested and expected to vest Weighted Average Contractual Term (in years)	0
Vested and expected to vest Aggregate Intrinsic Value (in millions)	9
Weighted-average period of years costs are expected to be recognied over	1 year 9 months 18 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	1.6
Incentive share awards canceled	-14,544
Incentive shares outstanding at September 30, 2014	338,282
Weighted-average period of years costs are expected to be recognied over	2 years 9 months
Director [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	3.1
Incentive share awards outstanding at January 1, 2014	453,146
Incentive shares granted	69,744
Weighted-average period of years costs are expected to be recognied over	1 year 6 months
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	0.2
Chief Executive Officer [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$0.40
Incentive shares outstanding at September 30, 2014	300,000
Weighted-average period of years costs are expected to be recognied over	1 year 1 month 6 days

StockBased_Compensation_Restri1

Stock-Based Compensation Restricted and Phantom Stock (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted stock awards granted	379,000
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	$0.20
Phantom Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Incentive shares outstanding at September 30, 2014	66,339
Phantom Stock [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number Of Units Of Phantom Stock Used As Basis For Market Value Of Common Stock On Vesting Date	1,000,000
Number Of Units Of Common Stock Used To Measure Value Of Phantom Stock On Vesting Date	1,000,000
Years phantom stock vests over	5 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	1.6
Weighted-average period of years costs are expected to be recognied over	2 years 9 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restrictions lapsed	-14,544
Incentive shares outstanding at September 30, 2014	338,282
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Period Increase (Decrease)	-170,064
Restrictions lapsing Weighted Average Grant Date Fair Value	$8.83
Restricted Stock [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	3.1
Weighted-average period of years costs are expected to be recognied over	1 year 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Incentive share awards outstanding at January 1, 2014	453,146
Restricted stock awards granted	69,744
Restricted stock awards outstanding	$16.90	$13.93
Restricted stock awards granted Weighted Average Grate Date Fair Value	$17.04
Restrictions lapsing Weighted Average Grant Date Fair Value	$19.29
Restricted Stock [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$0.40
Weighted-average period of years costs are expected to be recognied over	1 year 1 month 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Incentive shares outstanding at September 30, 2014	300,000

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Transaction Gain, before Tax	($0.20)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	3.8	3.7
Assets, Fair Value Disclosure [Abstract]
Business Combination, Contingent Consideration, Liability	3.6	3.8
Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available for sale securities			4.6	4.6
Trading securities			2.4	2.3
Business Combination, Contingent Consideration, Liability			0.2	0.2
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets, Fair Value Disclosure [Abstract]
Available for sale securities			0	0
Trading securities			2.4	2.3
Business Combination, Contingent Consideration, Liability			0	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Available for sale securities			0	0
Trading securities			0	0
Business Combination, Contingent Consideration, Liability			0	0
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets, Fair Value Disclosure [Abstract]
Available for sale securities			4.6	4.6
Trading securities			0	0
Business Combination, Contingent Consideration, Liability			0.2	0.2
Senior Secured Notes Maturing 2017 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes Payable, Fair Value Disclosure			$376	$371

Fair_Value_Measurements_Unobse

Fair Value Measurements Unobservable Inputs Rollforward (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business Combination, Contingent Consideration, Liability	$3.60	$3.80
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	3.7
Total realized/unrealized gains (losses) Included in other comprehensive income	0.1
Ending balance	3.8
Foreign Currency Transaction Gain, before Tax	-0.2
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business Combination, Contingent Consideration, Liability			0.2	0.2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business Combination, Contingent Consideration, Liability			0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business Combination, Contingent Consideration, Liability			0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business Combination, Contingent Consideration, Liability			$0.20	$0.20

Earnings_per_Share_Details

Earnings per Share (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share	5,200,000	3,600,000
Warrants outstanding	573,521

Receivables_Details

Receivables (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Receivables [Abstract]
Trade receivables	$126.40	$96.10
Interest receivables	0.6	0.2
Income tax receivable	1.6	1.4
Other receivables	9.6	11.7
Allowance for doubtful accounts	-1	-1
Total	137.2	108.4
Accounts Receivable, Net, Current	$137.20	$108.40

Inventories_Details

Inventories (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Semi finished inventory	$20.50	$19.30
Finished products	151.6	149.6
Total	262.1	229.8
Logs [Member]
Logs	70.8	39.6
Other Raw Materials [Member]
Logs	$19.20	$21.30

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2013
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%	35.00%
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	$13.90
Payment of long-term deposit			($17.10)

Other_Operating_Credits_and_Ch1

Other Operating Credits and Charges, Net (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Other Operating Credits And Charges, Net [Abstract]
Other operating charges and credits, net	$11.60	$0

Transactions_with_Affiliates_D

Transactions with Affiliates (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Related Party Transaction [Line Items]
Ownership in affiliates	50.00%
Due from affiliates	$0.90		$0.70
Due to Related Parties, Current	0.4
AbitibiBowater-LP [Member]
Related Party Transaction [Line Items]
Revenue from affiliates	1.7	2.5
AbitibiBowater-LP [Member] | I Joist [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Purchases from Related Party	$10.40	$12.20

Selected_Segment_Data_Details

Selected Segment Data (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Net sales:	$471.70	$444.70
Operating profit (loss):	-33.2	-10.2
Other operating charges and credits, net	-11.6	0
(Gain) loss on sale or impairment of long-lived assets, net	-0.1	0
Other Selling, General and Administrative Expense	-22.7	-27.3
Other non-operating income	-2.2	-4.3
Interest income	1.4	1.8
Interest expense, net of capitalized interest	-7.5	-7.7
Loss from operations before taxes	-40.8	-19.8
Benefit for income taxes	-6.3	-5.6
Net loss	-34.5	-14.2
OSB [Member]
Segment Reporting Information [Line Items]
Net sales:	190.2	194.9
Operating profit (loss):	-28.4	-1.9
Siding [Member]
Segment Reporting Information [Line Items]
Net sales:	173.5	143.5
Operating profit (loss):	32.9	19.2
Engineered Wood Products [Member]
Segment Reporting Information [Line Items]
Net sales:	64.8	62.2
Operating profit (loss):	-4.1	-3.1
South America [Member]
Segment Reporting Information [Line Items]
Net sales:	35.9	36.6
Operating profit (loss):	2.4	4.2
Other [Member]
Segment Reporting Information [Line Items]
Net sales:	7.3	7.9
Operating profit (loss):	-0.9	-0.7
Intersegment elimination [Member]
Segment Reporting Information [Line Items]
Net sales:	$0	($0.40)

Defined_Benefit_Pension_Plans_1

Defined Benefit Pension Plans (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Pension Expense	$2.50	$1.80
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	1	0.9
Interest cost	3.4	3.7
Expected return on plan assets	-3.8	-4.2
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.1	0
Defined Benefit Plan, Amortization of Gains (Losses)	1.8	1.4
Net periodic pension cost	2.5	1.8
Pension Contributions	1
Maximum [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	5
Minimum [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	$2

Guarantees_and_Indemnification2

Guarantees and Indemnifications (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning Balance	$31.40	$29.30
Accrued to expense	0.1	0.2
Foreign currency translation	-1.3	-0.4
Payments made	-3.1	-2.9
Total warranty reserves	27.1	26.2
Current portion of warranty reserves	-12	-12
Long-term portion of warranty reserves	$15.10	$14.20

Other_Comprehensive_Income_Det

Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income [Line Items]
Foreign Currency Translation Adjustment, Net of Tax	($41.50)	($21)	($33.70)	($19.20)
Pension and Other Postretirement Benefit Plans, Net of Tax	-97.4	-69	-99	-70.3
Available-for-sale Securities Adjustment, Net of Tax	2.6	2.1	2.6	2
Other, Net of Tax	-1.1	-1.7	-1.2	-1.7
Accumulated comprehensive loss	-137.4	-89.6	-131.3	-89.2
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.1	0
Defined Benefit Plan, Amortization of Gains (Losses)	1.8	1.4
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Transition Asset (Obligation), Recognized in Net Periodic Benefit Cost, before Tax	0	0.4
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax	1.9	1.8
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Transition Asset (Obligation), Recognized in Net Periodic Benefit Cost, Tax	0.8	0.5
Foreign currency translation adjustments	-7.8	-1.8
Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0.5	2.6
Unrealized gain on marketable securities	0	0.1
Other	0.1	0
Other comprehensive income	-7.2	0.9
Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax	1.1	-1.3
Other comprehensive loss, net of tax	-6.1	-0.4
Defined benefit pension plans	1.6	1.3
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	1.1	1.3
Pension Plan, Defined Benefit [Member]
Accumulated Other Comprehensive Income [Line Items]
Defined benefit pension plans	$1.60