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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2012	May 07, 2012
Entity Information [Line Items]
Entity Registrant Name	LOUISIANA-PACIFIC CORP
Entity Central Index Key	0000060519
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		137,519,000

Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net sales	$ 361.5	$ 331.7
Operating costs and expenses:
Cost of sales	313.3	295.0
Depreciation and amortization	19.1	21.4
Selling and administrative	31.3	28.8
(Gain) loss on sale or impairment of long-lived assets, net	0.1	5.5
Other operating credits and charges, net	(0.2)	(0.8)
Total operating costs and expenses	363.6	349.9
Income (loss) from operations	(2.1)	(18.2)
Non-operating income (expense):
Interest expense, net of capitalized interest	(12.6)	(14.0)
Investment income	4.2	4.0
Other non-operating items	(0.1)	1.8
Total non-operating expense	(8.5)	(8.2)
Income (loss) from continuing operations before taxes and equity in losses of unconsolidated affiliates	(10.6)	(26.4)
Provision (benefit) for income taxes	(1.2)	(6.8)
IncomeLossFromEquityMethodInvestments	(1.8)	(3.3)
Income (loss) from continuing operations	(11.2)	(22.9)
Loss from discontinued operations before taxes	(0.2)	0.0
Benefit for income taxes	(0.1)	0.0
Loss from discontinued operations	(0.1)	0.0
Net income (loss)	(11.3)	(22.9)
Less: Net income (loss) attributed to non-controlling interest	0.0	0.1
Net income (loss) attributed to Louisiana-Pacific Corporation	$ (11.3)	$ (23.0)
Net income (loss) per share of common stock (basic):
Income (loss) from continuing operations	$ (0.08)	$ (0.18)
Loss from discontinued operations	0.00	0.00
Net income (loss) per share	(0.08)	(0.18)
Net income (loss) per share of common stock (diluted):
Income (loss) from continuing operations	(0.08)	(0.18)
Loss from discontinued operations diluted	0.00	0.00
Net income (loss) per share diluted	$ (0.08)	$ (0.18)
Average shares of stock outstanding - basic	136.6	131.3
Average shares of stock outstanding - diluted	136.6	131.3
Amounts attributed to LP Corporation common shareholders
Income (loss) from continuing operations, net of tax	$ (11.2)	$ (23.0)
Loss from discontinued operations, net of tax	(0.1)	0.0
Net loss attributed to Louisiana-Pacific Corporation	$ (11.3)	$ (23.0)

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net income (loss)	$ (11.3)	$ (22.9)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	4.7	(0.6)
Unrealized gain (loss) on derivative instruments	(0.2)	(0.2)
Unrealized gain (loss) on marketable securities	0.2	2.2
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	0.7	0.3
Other comprehensive income (loss), net of tax	5.4	1.7
Net (income) loss attributable to noncontrolling interest	0.0	(0.1)
Foreign currency translation adjustments attributed to non-controlling interest	0.0	(0.4)
Comprehensive income (loss)	$ (5.9)	$ (21.7)

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	$ 0.1	$ 0.1
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	0.1	0.7
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	$ 0.4	$ 0.1

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 280.5	$ 340.0
Receivables, net of allowance for doubtful accounts of $1.2 million at March 31, 2012 and $1.1 million at December 31, 2011	107.4	65.1
Income tax receivable	3.5	3.5
Inventories	212.3	163.6
Prepaid expenses and other current assets	3.9	5.7
Deferred income taxes	17.0	17.0
Current portion of notes receivable from asset sales	10.0	10.0
Assets held for sale	43.6	51.9
Total current assets	678.2	656.8
Timber and timberlands	43.6	45.5
Property, plant and equipment, at cost	2,033.4	2,028.1
Accumulated depreciation	(1,264.3)	(1,245.9)
Net property, plant and equipment	769.1	782.2
Notes receivable from asset sales	523.5	523.5
Long-term investments	1.0	0.7
Restricted cash	12.0	12.9
Investments in and advances to affiliates	79.9	79.1
Intangible assets, net of amortization	1.2	1.4
Deferred debt costs	8.5	8.9
Other assets	26.2	24.9
Long-term deferred tax asset	4.0	4.0
Total assets	2,147.2	2,139.9
LIABILITIES AND EQUITY
Current portion of long-term debt	6.6	5.3
Notes Payable	7.9	7.9
Accounts payable and accrued liabilities	142.9	122.3
Current portion of contingency reserves	4.0	4.0
Total current liabilities	161.4	139.5
Long-term debt, excluding current portion	719.3	715.9
Contingency reserves, excluding current portion	16.7	17.2
Other long-term liabilities	145.5	160.4
Deferred income taxes	108.4	106.0
Stockholders' equity:
Common stock	149.8	149.8
Additional paid-in capital	538.7	549.9
Retained earnings	670.5	681.8
Treasury stock	(262.3)	(274.4)
Accumulated comprehensive loss	(100.8)	(106.2)
Total stockholders' equity	995.9	1,000.9
Total liabilities and stockholders' equity	$ 2,147.2	$ 2,139.9

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts receivable	$ 1.2	$ 1.1

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (11.3)	$ (22.9)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	19.1	21.4
(Gain) loss from unconsolidated affiliates	1.8	3.3
(Gain) loss on sale or impairment of long-lived assets	0.1	5.5
Non Cash Other Operating Charges And Credits	(0.2)	0.0
Stock-based compensation expense	2.7	3.5
Exchange loss on remeasurement	0.3	2.5
Cash settlement of contingencies	(0.6)	(0.5)
Product Warranty Accrual, Period Increase (Decrease)	(2.4)	(1.2)
Pension (payments) expense, net	1.6	0.0
Other Noncash Expense	0.6	1.4
Other adjustments, net	(0.1)	0.2
Decrease (increase) in receivables	(40.6)	(30.5)
Decrease (increase) in income tax receivable	0.1	(8.7)
Decrease (increase) in inventories	(45.8)	(49.8)
Decrease (increase) in prepaid expenses	1.9	2.4
Increase (decrease) in accounts payable and accrued liabilities	9.7	1.7
Increase (decrease) in deferred income taxes	(1.3)	3.3
Net cash provided by (used in) operating activities	(64.4)	(68.4)
CASH FLOWS FROM INVESTING ACTIVITIES:
Property, plant, and equipment additions	(2.6)	(2.4)
Investments and advances to joint ventures	(3.0)	(2.0)
Proceeds from sales of assets	8.9	0.0
Decrease in restricted cash under letters of credit/credit facility	0.9	8.3
Net cash provided by investing activities	4.2	3.9
EFFECT OF EXCHANGE RATE ON CASH AND CASH EQUIVALENTS	0.7	(3.6)
Net increase (decrease) in cash and cash equivalents	(59.5)	(68.1)
Cash and cash equivalents at beginning of period	340.0	389.3
Cash and cash equivalents at end of period	$ 280.5	$ 321.2

Consolidated Statements of Stockholders' Equity - 3 months ended Mar. 31, 2012 - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Comprehensive Loss [Member]
Balance, Beginning Value at Dec. 31, 2011	$ 1,000.9	$ 149.8	$ (274.4)	$ 549.9	$ 681.8	$ (106.2)
Balance, Beginning Value, Shares at Dec. 31, 2011		149.8	12.7
Net income (loss)	(11.3)				(11.3)
Issuance of shares for employee stock plans and other purposes and other transactions	(1.8)		$ 12.1	(13.9)
Issuance of shares for employee stock plans and other purposes and other transactions			(0.4)
Compensation expense associated with stock awards	2.7			2.7
Other comprehensive income	5.4					5.4
Balance, Ending Value, Shares at Mar. 31, 2012		149.8	12.3
Balance, Ending Value at Mar. 31, 2012	$ 995.9	$ 149.8	$ (262.3)	$ 538.7	$ 670.5	$ (100.8)

- Definition

This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

+ References

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details

- Definition

This element represents Other Comprehensive Income or Loss, Net of Tax, for the period. Includes deferred gains or losses on qualifying hedges, unrealized holding gains or losses on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

+ References

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+ Details

- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References + Details

Basis For Presentation	3 Months Ended
Basis For Presentation	Mar. 31, 2012
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, except for other operating credits and charges, net referred to in Note 10) 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. For those consolidated subsidiaries in which LP’s ownership interest is less than 100%, the outside shareholders’ interests are shown as non-controlling interest. These condensed 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, 2011.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References

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+ Details

Stock-Based Compensation

3 Months Ended

Mar. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

STOCK-BASED COMPENSATION

At March 31, 2012, 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 $2.7 million for the quarter ended March 31, 2012 as compared to $3.5 million for the quarter ended March 31, 2011. Included in total stock compensation expense is stock compensation expense related to awards granted to LP's retiring Chief Executive Officer, which was $1.0 million for the quarter ended March 31, 2012 as compared to $2.0 million for the quarter ended March 31, 2011.

Stock Compensation Plans

LP grants options and stock settled stock appreciation rights (SSARs) to key employees and directors to purchase LP common stock. On exercise or issuance, LP generally issues these shares from treasury. The options and SSARs are granted at market price at the date of grant. For employees, SSARs become exercisable ratably over a three year period and expire ten years after the date of grant. For directors, these options become exercisable in 10% increments every three months, starting three months after the date of grant, and expire ten years after the date of grant. At March 31, 2012, 3.4 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:



	2012	2011
Expected stock price volatility	63.3%	64.2%
Expected dividend yield	—%	—%
Risk-free interest rate	0.7%	2.1%
Expected life of options	5 years	5 years
Weighted average fair value of options and SSARs granted	$4.68	$5.68

The following table summarizes stock options and SSARs outstanding as of March 31, 2012, as well as activity during the three month period then ended.



Share amounts in thousands	Options and SSARs		Weighted Average Exercise Price		Weighted Average Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Options / SSARs outstanding at January 1, 2012	8,315		$	12.78
SSARs granted	822		8.84
Options / SSARs exercised	(80	)	6.97
Options /SSARs cancelled	(16	)	14.45
Options/SSARs outstanding at March 31, 2012	9,041		$	12.47	6.4	$	16.2
Vested and expected to vest at March 31, 2012	8,589		—		—	$	15.4
Options/SSARS exercisable at March 31, 2012	7,276		$	13.36	—	$	14.8

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 quarter of 2012 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, 2012. This amount changes based on the market value of LP's stock as reported by the New York Stock Exchange.

As of March 31, 2012, there was $5.9 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 2.1 years. LP recorded compensation expense related to these awards in the first three months of 2012 of $1.5 million.

Incentive Share Awards

LP has granted incentive share stock awards (restricted stock units) to certain key employees as allowed under the current stock award plans. 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 of these grants approximates the fair value. LP recorded compensation expense related to these awards in the first three months of 2012 of $0.8 million compared to $0.4 million in the first three months of 2011. As of March 31, 2012, there was $4.5 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, 2012 as well as activity during the three months then ended.



	Shares		Weighted Average Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Incentive share awards outstanding at January 1, 2012	1,112,868
Incentive share awards granted	314,552
Incentive share awards vested	(407,909	)
Incentive share awards canceled	(19,362	)
Incentive shares outstanding at March 31, 2012	1,000,149		1.82	$	9.4
Vested and expected to vest at March 31, 2012	950,142			$	8.9
Incentive share awards exercisable at March 31, 2012	—		—	—

Restricted Stock

LP grants restricted stock to certain senior 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, 2012, there was $3.1 million of total unrecognized compensation costs related to restricted stock. This expense will be recognized over the next 1.1 years.

The following table summarizes the restricted stock outstanding as of March 31, 2012 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, 2012	760,728		$	5.04
Restricted stock awards granted	177,196		8.84
Restrictions lapsed	(405,750	)	2.17
Restricted stock awards at March 31, 2012	532,174		$	8.49

LP recorded compensation expense related to these awards in the first three months of 2012 of $0.4 million.

LP annually granted to each director restricted stock or restricted stock units. As of March 31, 2012, LP had 352,178 shares (or restricted stock units) outstanding under this program.

Phantom stock

LP annually grants phantom stock units to its directors. The director does 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 cost of the grants is recognized over the vesting period and is included in stock-based compensation expense. As of March 31, 2012, LP had 39,944 shares outstanding under this program.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 6: 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

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

+ Details

Fair Value Measurements

3 Months Ended

Mar. 31, 2012

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. 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 measured on a recurring basis for each of the three hierarchy levels presented below.



Dollar amounts in millions	March 31, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Available for sale securities	$	1.0	$	—	$	—	$	1.0
Trading securities	2.9		2.9		—		—
Total	$	3.9	$	2.9	$	—	$	1.0
Dollar amounts in millions	December 31, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Available for sale securities	$	0.7	$	—	$	—	$	0.7
Trading securities	2.7		2.7		—		—
Total	$	3.4	$	2.7	$	—	$	0.7

Due to the lack of observable market quotations on a portion of LP’s 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.

Trading securities consist of rabbi trust financial assets which are recorded in other assets in LP’s consolidated balance sheets. The rabbi trust holds the assets of the Louisiana-Pacific Corporation 2004 Executive Deferred Compensation Plan (EDC), a non-qualified deferred compensation plan which allows certain management employees to defer receipt of a portion of their compensation and contribute such amounts to one or more investment funds. The assets of the rabbi trust are invested in mutual funds and are reported at fair value based on active market quotations, which represent Level 1 inputs.

The following table summarizes changes in assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the periods ended March 31, 2011 and March 31, 2012.



Dollar amounts in millions	Available for sale securities
Balance at December 31, 2010	$	11.6
Total realized/unrealized gains included in other comprehensive income	2.9
Balance at March 31, 2011	$	14.5
The amount of total losses for the period included in net loss attributable to the fair value of changes in assets still held at March 31, 2011	$	—

Balance at December 31, 2011	$	0.7
Total realized/unrealized gains included in other comprehensive income	0.3
Balance at March 31, 2012	$	1.0
The amount of total losses for the period included in net loss attributable to the fair value of changes in assets still held at March 31, 2012	$	—

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 investments.

During the quarter ended March 31, 2011, LP recorded an impairment charge of $3.6 million to reduce the carrying value of assets held for sale to the estimated selling prices less selling cost. The valuation of these assets was determined using Level 2 inputs under the market approach. Also during the quarter ended March 31, 2011, LP recorded an impairment charge of $1.9 million on assets no longer used.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15C, 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-Subparagraph a-d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15B
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 3, 10, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 17-22, 27, 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13537-108611

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13504-108611

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258

+ Details

Earnings per Share

3 Months Ended

Mar. 31, 2012

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 (employee and director stock options, stock settled stock appreciation rights, incentive shares and warrants) be excluded from the calculation of diluted earnings per share for the periods in which losses from continuing operations are reported because the effect is anti-dilutive. The following table sets forth the computation of basic and diluted earnings per share:



Dollar and share amounts in millions, except per share amounts	Quarter Ended March 31,
	2012			2011
Numerator:
Loss attributed to LP common shares:
Loss from continuing operations	$	(11.2	)	$	(23.0	)
Loss from discontinued operations	(0.1		)	—
Net loss	$	(11.3	)	$	(23.0	)
Denominator:
Basic - weighted average common shares outstanding	136.6			131.3
Dilutive effect of stock warrants	—			—
Dilutive effect of stock plans	—			—
Diluted shares outstanding	136.6			131.3
Basic earnings per share:
Loss from continuing operations	$	(0.08	)	$	(0.18	)
Loss from discontinued operations	—			—
Net loss per share	$	(0.08	)	$	(0.18	)
Diluted earnings per share:
Loss from continuing operations	$	(0.08	)	$	(0.18	)
Loss from discontinued operations	—			—
Net loss per share	$	(0.08	)	$	(0.18	)

For the three month periods ended March 31, 2012 and March 31, 2011, stock options, stock warrants and SSARs relating to approximately 7.4 million and 9.6 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.

Receivables

3 Months Ended

Mar. 31, 2012

Receivables [Abstract]

Receivables

RECEIVABLES

Receivables consist of the following:



Dollar amounts in millions	March 31, 2012			December 31, 2011
Trade receivables	$	97.2		$	55.9
Interest receivables	3.3			1.2
Other receivables	8.1			9.1
Allowance of doubtful accounts	(1.2		)	(1.1		)
Total	$	107.4		$	65.1

Other receivables at March 31, 2012 and December 31, 2011 primarily consist of settlements, Canadian sales tax receivables, receivables from joint ventures and other items.

- Definition

The entire disclosure for claims held for amounts due a company. Examples include trade accounts receivables, notes receivables, loans receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 3, 4
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 7
-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 01-6
-Paragraph 13
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 4
-Section 08
-Paragraph k

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3,4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5074-111524

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5066-111524

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
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-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5162-111524

+ Details

Inventories

3 Months Ended

Mar. 31, 2012

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, 2012			December 31, 2011
Logs	$	41.8		$	26.5
Other raw materials	21.5			18.6
Finished products	139.3			109.6
Supplies	10.3			9.5
LIFO reserve	(0.6		)	(0.6		)
Total	$	212.3		$	163.6

Assets Held for Sale

3 Months Ended

Mar. 31, 2012

Property, Plant and Equipment Assets Held-for-sale Disclosure [Abstract]

Assets Held for Sale

ASSETS HELD FOR SALE

Over the last several years, LP has adopted and implemented plans to sell selected assets in order to improve its operating results. LP is required to classify assets held for sale which are not part of a discontinued business separately on the face of the financial statements outside of “Property, plant and equipment.” As of March 31, 2012 and December 31, 2011, LP included three OSB mills and various non-operating sites in its held for sale category. See Note 3 for discussion of impairments recorded on these assets to reduce carrying value to sales prices less estimated selling costs. The current book values of assets held for sale by category is as follows:



Dollars in millions	March 31, 2012			December 31, 2011
Property, plant and equipment, at cost:
Land, land improvements and logging roads, net of road amortization	$	10.1		$	13.1
Buildings	17.1			22.9
Machinery and equipment	170.1			178.3
	197.3			214.3
Accumulated depreciation	(153.7		)	(162.4		)
Net property, plant and equipment	$	43.6		$	51.9

During the first quarter of 2012, LP sold two non-operating properties for cash proceeds of $8.5 million.

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

+ References + Details

Income Taxes

3 Months Ended

Mar. 31, 2012

Income Tax Expense (Benefit) [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 bases 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 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. 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.

For the first three months of 2012, the primary differences between the U.S. statutory rate of 35% and the effective rate applicable to LP’s continuing operations relate to the effect of foreign tax rates, increases in valuation allowances attributed to net operating loss carryforwards in various jurisdictions and increase in our reserves for uncertain tax positions. For the first three months of 2011, the primary differences between the U.S. statutory rate of 35% and the effective rate applicable to LP’s continuing operations relate to state income taxes and the effect of foreign tax rates and increases in valuation allowances attributed to net operating loss carryforwards in various jurisdictions.

The income tax components and associated effective income tax rates for the three months ended March 31, 2012 and 2011 are as follows:



	Quarter Ended March 31,
	2012					2011
Dollars in millions	Tax Benefit			Tax Rate		Tax Benefit			Tax Rate
Continuing operations	$	(1.2	)	9	%	$	(6.8	)	23	%
Discontinued operations	(0.1		)	35	%	—			—	%
	$	(1.3	)	10	%	$	(6.8	)	23	%

LP and its domestic subsidiaries are subject to U.S. federal income tax as well as income taxes of multiple state jurisdictions. LP’s foreign subsidiaries are subject to income tax in Canada, Chile, Peru and Brazil. As of March 31, 2012, the U.S. Internal Revenue Service (IRS) was in the process of auditing tax years 2007 through 2009. All U.S. federal audits of prior years have been completed. LP remains subject to state and local tax examinations for the tax years 2005 through 2011. Canadian federal income tax returns have been audited and effectively settled through 2004, and no examinations are currently in progress. Years subsequent to 2004, with the exception of 2006, remain subject to examination. Quebec provincial audits have been effectively settled through 2007, and an audit of years 2008 through 2010 is currently in progress. As of March 31, 2012, the Chilean Tax Office was in process of auditing tax years 2008 through 2010.

In connection with the IRS audit of tax years 2007 through 2009 described above, LP has been informally notified that the IRS will propose an assessment based upon the disallowance of certain accelerated depreciation positions taken by LP. LP disagrees with the potential assessment and, based on its views of the merits of its positions, believes that no accrual is required at this time However, if the IRS were to fully prevail on the matter, LP would be required to make a cash payment of $17.5 million plus interest, and would have the benefit of an additional $17.5 million of depreciation deductions in future periods. LP is working with its outside tax advisers and the IRS to resolve this dispute in a timely matter.

If LP were to determine that it would not be able to realize a portion of an existing net deferred tax asset in excess of an existing valuation allowance, an adjustment to the net deferred tax asset would be charged to earnings in the period in which such determination was made. Conversely, if it were to make a determination that it is more likely than not that an existing deferred tax asset for which there is currently a valuation allowance would be realized, the related valuation allowance would be reduced and a benefit to earnings would be recorded in the period in which such determination was made.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

+ Details

Long-term Debt

3 Months Ended

Mar. 31, 2012

Debt Disclosure [Abstract]

Long-term Debt

LONG-TERM DEBT

LP’s long-term debt consists of the following:



Dollars in millions	March 31, 2012			December 31, 2011
Debentures:
Senior secured notes, maturing 2017	$	191.2		$	189.6
Bank credit facilities:
Chilean term credit facility, maturing 2019, denominated in UF	43.7			40.5
Brazilian export financing facility, maturing 2017	10.0			10.0
Limited recourse notes payable:
Senior notes, payable 2012	7.9			7.9
Senior notes, payable 2013 - 2018	112.0			112.0
Other financing
Non-recourse notes, payable 2018	368.7			368.7
Other	0.3			0.4
Total	733.8			729.1
Less: current portion	(14.5		)	(13.2		)
Net long-term portion	$	719.3		$	715.9

LP issued $47.9 million ($7.9 million outstanding as March 31, 2012) of senior notes in 1997 in a private placement to institutional investors. The remaining notes are secured by $9.9 million in notes receivable from Sierra Pacific Industries and mature in 2012. In the event of a default by Sierra Pacific Industries, LP is fully liable for the notes payable with the underlying timberlands as security for the notes receivable.

LP issued $348.6 million ($112.0 million remaining outstanding as of March 31, 2012) of senior notes in 1998 in a private placement to institutional investors. The remaining notes mature in principal amounts of $90.0 million in 2013 and $22.0 million in 2018. The remaining notes are secured by $113.7 million of notes receivable from Green Diamond Resource Company (Green Diamond). Pursuant to the terms of the notes payable, in the event of a default by Green Diamond, LP would be liable to pay only 10% of the indebtedness represented by the notes payable with the underlying timberlands as security for the notes receivable.

LP issued $368.7 million of senior debt in 2003 in a private placement to unrelated third parties. The senior debt mature in 2018. The senior debt is supported by a bank letter of credit. LP’s reimbursement obligations under the letter of credit are secured by $410.0 million in notes receivable from assets sales. In general, the creditors under this arrangement have no recourse to LP’s assets, other than the notes receivable. However, under certain circumstances, LP may be liable for certain liabilities (including liabilities associated with the marketing or remarketing of the senior debt and reimbursement obligations, which are fully cash collateralized under the letter of credit supporting the notes payable) in an amount not to exceed 10% of the aggregate principal amount of the notes receivable.

In December 2009, LP entered into a term loan agreement with a Chilean bank. This loan is denominated in UF (inflation adjusted Chilean pesos) and is partially secured by property, plant and equipment in Chile. The loan will be repaid in 16 equal semi-annual payments beginning in June 2012 and ending December 2019. As of March 31, 2012, no principal payments have been made on this loan. Any increases or decreases in the loan balance shown are related to the change in the underlying foreign currency exchange rates or required inflation adjustments.

In August 2011, LP entered into a export financing loan agreement with a Brazilian bank. This loan will be repaid in 10 equal semi-annual payments beginning in January 2013 and ending July 2017.

LP estimates the senior secured notes maturing in 2017 to have a fair value of $236 million as of March 31, 2012 and $243 million at December 31, 2011 based upon market quotations.

Additional descriptions of LP’s indebtedness are included in consolidated financial statements and the notes thereto included in LP’s Annual Report on Form 10-K for the year ended December 31, 2011.

Other Operating Credits and Charges, Net

3 Months Ended

Mar. 31, 2012

Other Operating Credits And Charges, Net [Abstract]

Other Operating Credits and Charges, Net

OTHER OPERATING CREDITS AND CHARGES, NET

The major components of “Other operating credits and charges, net” in the Consolidated Statements of Income for the three months ended March 31, 2012 and March 31, 2011 are reflected in the table below and are described in the paragraphs following the table:



	Quarter Ended March 31,
Dollar amounts in millions	2012			2011
Severance	$	(0.3	)	$	—
Construction related legal reserves	0.5			—
Settlement of legal claim	—			0.8
	$	0.2		$	0.8

During the first quarter of 2012, LP recorded a loss of $0.3 million associated with severance related to an indefinitely curtailed OSB mill in British Columbia, Canada as well as a reversal of a $0.5 million loss associated with an assessment in connection with one of its indefinitely curtailed OSB mills.

During the first quarter of 2011, LP recorded a gain of $0.8 million related to an action against a previous claims inspector associated with LP’s hardboard class action for various states.

Transactions with Affiliates	3 Months Ended
Transactions with Affiliates	Mar. 31, 2012
Related Party Transactions [Abstract]
Transactions with Affiliates	TRANSACTIONS WITH AFFILIATES LP has equity investments in AbitibiBowater-LP (a manufacturer of I-joist) and Canfor-LP ( a manufacturer of OSB). LP sells products and raw materials to AbitibiBowater-LP and purchases products for resale from AbitibiBowater-LP and Canfor-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 quarters ended March 31, 2012 and 2011, LP sold $1.6 million and $1.4 million of products to AbitibiBowater-LP and purchased $7.8 million and $7.6 million of I-joist from AbitibiBowater-LP. LP also purchased $26.9 million and $24.6 million of OSB from Canfor-LP during the quarters ended March 31, 2012 and 2011. Included in LP’s Consolidated Balance Sheets at March 31, 2012 and December 31, 2011 are $1.2 million and $0.5 million in accounts receivable from these affiliates and $5.3 million and $2.3 million in accounts payable to these affiliates.

- Definition

The entire disclosure for related party transactions, including the nature of the relationship(s), a description of the transactions, the amount of the transactions, the effects of any change in the method of establishing the terms of the transaction from the previous period, stated interest rate, expiration date, terms and manner of settlement per the agreement with the related party, and amounts due to or from related parties. If the entity and one or more other entities are under common ownership or management control and this control affects the operating results or financial position, disclosure includes the nature of the control relationship even if there are no transactions between the entities. Disclosure may also include the aggregate amount of current and deferred tax expense for each statement of earnings presented where the entity is a member of a group that files a consolidated tax return, the amount of any tax related balances due to or from affiliates as of the date of each statement of financial position presented, the principal provisions of the method by which the consolidated amount of current and deferred tax expense is allocated to the members of the group and the nature and effect of any changes in that method. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 4
-Section 08
-Paragraph k

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 3A
-Section 04
-Paragraph b

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 57
-Paragraph 1-4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39678-107864

+ Details

Legal and Environmental Matters	3 Months Ended
Legal and Environmental Matters	Mar. 31, 2012
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. 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

3 Months Ended

Mar. 31, 2012

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, 2011.



	Quarter Ended March 31,
Dollar amounts in millions	2012			2011
Net sales:
OSB	$	149.0		$	132.1
Siding	113.1			106.2
Engineered Wood Products	48.6			48.3
South America	42.4			35.3
Other	10.0			10.5
Intersegment sales	(1.6		)	(0.7		)
	$	361.5		$	331.7
Operating profit (loss):
OSB	$	(0.3	)	$	(9.1	)
Siding	16.8			12.7
Engineered Wood Products	(2.8		)	(5.5		)
South America	3.1			3.6
Other	(0.7		)	(0.7		)
Other operating credits and charges, net	0.2			0.8
Loss on sale or impairment of long-lived assets	(0.1		)	(5.5		)
General corporate and other expenses, net	(20.1		)	(17.8		)
Foreign currency gains (losses)	(0.1		)	1.8
Investment income	4.2			4.0
Interest expense, net of capitalized interest	(12.6		)	(14.0		)
Loss from continuing operations before taxes	(12.4		)	(29.7		)
Benefit for income taxes	(1.2		)	(6.8		)
Loss from continuing operations	$	(11.2	)	$	(22.9	)

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

+ Details

Potential Impairments	3 Months Ended
Potential Impairments	Mar. 31, 2012
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, 2012, the undiscounted cash flows for the facilities indefinitely curtailed support the conclusion that no impairment is necessary for those facilities. However, if demand and pricing for the relevant products continues at levels significantly below cycle average demand and pricing, or should LP decide to invest capital in alternative projects, it is possible that impairment charges will be required. See discussion in Note 3 Fair Value Measurements for impairment charges recorded in the periods presented. 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.

Contingency Reserves

3 Months Ended

Mar. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Contingency Reserves

CONTINGENCY RESERVES

LP maintains reserves for various contingent liabilities as follows:



Dollar amounts in millions	March 31, 2012			December 31, 2011
Environmental reserves	$	14.6		$	15.0
Hardboard siding reserves	6.1			6.2
Total contingency reserves	20.7			21.2
Current portion of contingency reserves	(4.0		)	(4.0		)
Long-term portion of contingency reserves	$	16.7		$	17.2

Hardboard Siding Reserves

LP has established reserves relating to certain liabilities associated with a settlement agreement resulting from a nationwide class action lawsuit involving hardboard siding manufactured or sold by corporations acquired by LP in 1999 and installed prior to May 15, 2000 which was approved by the applicable courts in 2000. This settlement is discussed in greater detail in the Notes to the financial statements included in LP’s Annual Report on Form 10-K for the year ended December 31, 2011. LP believes that the reserve balance for this settlement at March 31, 2012 will be adequate to cover future payments to claimants and related administrative costs.

The activity in the portion of LP's loss contingency reserves relating to hardboard siding contingencies for the first three months of 2012 and 2011 are summarized in the following table.



Dollar amounts in millions	March 31, 2012			March 31, 2011
Beginning balance, December 31,	$	6.2		$	17.8
Payments made for claims	(0.1		)	(0.3		)
Payments made for administrative costs	—			(0.1		)
Ending balance	$	6.1		$	17.4

LP believes that the reserve balance at March 31, 2012 will be adequate to cover future payments to claimants and related administrative costs.

- Definition

The entire disclosure for environmental loss contingencies, such as presence of hazardous waste, relevant information from reports issued by regulators, and estimated costs to achieve compliance with regulatory requirements. This element may be used for all of an entity's disclosures about environmental loss contingencies.

+ References + Details

Defined Benefit Pension Plans

3 Months Ended

Mar. 31, 2012

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 quarter ended March 31, 2012 and 2011. The net periodic pension cost included the following components:



	Quarter Ended March 31,
Dollar amounts in millions	2012			2011
Service cost	$	0.9		$	0.8
Interest cost	3.7			4.0
Expected return on plan assets	(4.3		)	(4.5		)
Amortization of prior service cost	0.1			0.1
Amortization of net loss	1.7			1.1
Net periodic pension cost	$	2.1		$	1.5

During the three months ended March 31, 2012 and 2011, LP recognized $2.1 million and $1.5 million of pension expense for all of LP’s defined benefit pension plans.

During the three months ended March 31, 2012, LP made $0.5 million in pension contributions for LP’s defined benefit plans. LP presently anticipates making approximately $0.5 million in additional pension contributions for the plans during the remainder of 2012.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph q
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 8
-Subparagraph m
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-2
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 30
-Paragraph 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS106-2
-Paragraph 20, 21, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7, 21, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7, 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS88
-Paragraph 63
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

+ Details

Guarantees and Indemnifications

3 Months Ended

Mar. 31, 2012

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 21 of the Notes to the financial statements included in LP’s Annual Report on Form 10-K for the year ended December 31, 2011 for further discussion of LP’s guarantees and indemnifications.

Additionally, 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 first three months of 2012 and 2011 are summarized in the following table:



	Quarter Ended March 31,
Dollar amounts in millions	2012			2011
Beginning balance	$	30.3		$	29.5
Accrued to expense	0.3			1.1
Payments made	(2.7		)	(2.3		)
Total warranty reserves	27.9			28.3
Current portion of warranty reserves	(12.0		)	(10.0		)
Long-term portion of warranty reserves	$	15.9		$	18.3

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 Condensed Consolidated Balance Sheets.

Recent and Prospective Accounting Pronouncements	3 Months Ended
Recent and Prospective Accounting Pronouncements	Mar. 31, 2012
Accounting Policies [Abstract]
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	PRESENT AND PROSPECTIVE ACCOUNTING PROUNOUNCEMENTS In June 2011, FASB amended Accounting Standards Codification ("ASC") 220, “Presentation of Comprehensive Income.” This amendment will require companies to present the components of net income and other comprehensive income either as one continuous statement or as two consecutive statements. It eliminates the option to present components of other comprehensive income as part of the statement of changes in stockholders' equity. The amended guidance, which must be applied retroactively, is effective for interim and annual periods beginning after December 15, 2011, with earlier adoption permitted. This Accounting Standards Update ("ASU") impacts presentation only and had no effect on LP's financial condition, results of operations or cash flows. In December 2011, the FASB issued ASU 2011-12, which is an update to the amendment issued in June. This amendment defers the specific requirements to present items that are reclassified from accumulated other comprehensive income to net income separately with their respective components of net income and other comprehensive income. In May 2011, the FASB amended ASC 820, "Fair Value Measurement." This amendment is intended to create convergence between U.S. GAAP and International Financial Reporting Standards (“IFRS”) requirements for measurement of and disclosures about fair value. This guidance clarifies the application of existing fair value measurements and disclosures, and changes certain principles or requirements for fair value measurements and disclosures. The amendment is effective for interim and annual periods beginning after December 15, 2011. The implementation of the amended accounting guidance did not have a material impact on our consolidated financial position or results of operations.

Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]



	2012	2011
Expected stock price volatility	63.3%	64.2%
Expected dividend yield	—%	—%
Risk-free interest rate	0.7%	2.1%
Expected life of options	5 years	5 years
Weighted average fair value of options and SSARs granted	$4.68	$5.68

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following table summarizes stock options and SSARs outstanding as of March 31, 2012, as well as activity during the three month period then ended.



Share amounts in thousands	Options and SSARs		Weighted Average Exercise Price		Weighted Average Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Options / SSARs outstanding at January 1, 2012	8,315		$	12.78
SSARs granted	822		8.84
Options / SSARs exercised	(80	)	6.97
Options /SSARs cancelled	(16	)	14.45
Options/SSARs outstanding at March 31, 2012	9,041		$	12.47	6.4	$	16.2
Vested and expected to vest at March 31, 2012	8,589		—		—	$	15.4
Options/SSARS exercisable at March 31, 2012	7,276		$	13.36	—	$	14.8

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

The following table summarizes incentive share awards outstanding as of March 31, 2012 as well as activity during the three months then ended.



	Shares		Weighted Average Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Incentive share awards outstanding at January 1, 2012	1,112,868
Incentive share awards granted	314,552
Incentive share awards vested	(407,909	)
Incentive share awards canceled	(19,362	)
Incentive shares outstanding at March 31, 2012	1,000,149		1.82	$	9.4
Vested and expected to vest at March 31, 2012	950,142			$	8.9
Incentive share awards exercisable at March 31, 2012	—		—	—

Restricted Stock Activity [Table Text Block]

The following table summarizes the restricted stock outstanding as of March 31, 2012 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, 2012	760,728		$	5.04
Restricted stock awards granted	177,196		8.84
Restrictions lapsed	(405,750	)	2.17
Restricted stock awards at March 31, 2012	532,174		$	8.49

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value Disclosures [Abstract]

Fair Value, Measurement Inputs, Disclosure [Table Text Block]

The following table summarizes assets measured on a recurring basis for each of the three hierarchy levels presented below.



Dollar amounts in millions	March 31, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Available for sale securities	$	1.0	$	—	$	—	$	1.0
Trading securities	2.9		2.9		—		—
Total	$	3.9	$	2.9	$	—	$	1.0
Dollar amounts in millions	December 31, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Available for sale securities	$	0.7	$	—	$	—	$	0.7
Trading securities	2.7		2.7		—		—
Total	$	3.4	$	2.7	$	—	$	0.7

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]



Dollar amounts in millions	Available for sale securities
Balance at December 31, 2010	$	11.6
Total realized/unrealized gains included in other comprehensive income	2.9
Balance at March 31, 2011	$	14.5
The amount of total losses for the period included in net loss attributable to the fair value of changes in assets still held at March 31, 2011	$	—

Balance at December 31, 2011	$	0.7
Total realized/unrealized gains included in other comprehensive income	0.3
Balance at March 31, 2012	$	1.0
The amount of total losses for the period included in net loss attributable to the fair value of changes in assets still held at March 31, 2012	$	—

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

+ References + Details

- Definition

Tabular disclosure of the fair value measurement of assets and liabilities which includes [financial] instruments measured at fair value that are classified in stockholders' equity. Such assets and liabilities may be measured on a recurring or nonrecurring basis. The disclosures which may be required or desired include: (1) for assets and liabilities measured on a recurring basis, disclosure may include: (a) the fair value measurements at the reporting date; (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3); (c) for fair value measurements using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (i) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (ii) purchases, sales, issuances, and settlements (net); (iii) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs); (d) the amount of the total gains or losses for the period in subparagraph (c) (i) above included in earnings (or changes in net assets) that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date and a description of where those unrealized gains or losses are reported in the statement of income (or activities); (e) the valuation technique(s) used to measure fair value and a discussion of changes in valuation techniques, if any, during the period and (2) for assets and liabilities that are measured at fair value on a nonrecurring basis (for example, impaired assets) disclosure may include, in addition to (a) above: (a) the reasons for the fair value measurements recorded; (b) the same as (b) above; (c) for fair value measurements using significant unobservable inputs (Level 3), a description of the inputs and the information used to develop the inputs; and (d) the valuation technique(s) used to measure fair value and a discussion of changes, if any, in the valuation technique(s) used to measure similar assets and/or liabilities in prior periods. Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 33
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 6
-Footnote 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19279-110258

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258

+ Details

Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table sets forth the computation of basic and diluted earnings per share:



Dollar and share amounts in millions, except per share amounts	Quarter Ended March 31,
	2012			2011
Numerator:
Loss attributed to LP common shares:
Loss from continuing operations	$	(11.2	)	$	(23.0	)
Loss from discontinued operations	(0.1		)	—
Net loss	$	(11.3	)	$	(23.0	)
Denominator:
Basic - weighted average common shares outstanding	136.6			131.3
Dilutive effect of stock warrants	—			—
Dilutive effect of stock plans	—			—
Diluted shares outstanding	136.6			131.3
Basic earnings per share:
Loss from continuing operations	$	(0.08	)	$	(0.18	)
Loss from discontinued operations	—			—
Net loss per share	$	(0.08	)	$	(0.18	)
Diluted earnings per share:
Loss from continuing operations	$	(0.08	)	$	(0.18	)
Loss from discontinued operations	—			—
Net loss per share	$	(0.08	)	$	(0.18	)

Receivables (Tables)

3 Months Ended

Mar. 31, 2012

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

Receivables consist of the following:



Dollar amounts in millions	March 31, 2012			December 31, 2011
Trade receivables	$	97.2		$	55.9
Interest receivables	3.3			1.2
Other receivables	8.1			9.1
Allowance of doubtful accounts	(1.2		)	(1.1		)
Total	$	107.4		$	65.1

Inventories (Tables)

3 Months Ended

Mar. 31, 2012

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]



Dollar amounts in millions	March 31, 2012			December 31, 2011
Logs	$	41.8		$	26.5
Other raw materials	21.5			18.6
Finished products	139.3			109.6
Supplies	10.3			9.5
LIFO reserve	(0.6		)	(0.6		)
Total	$	212.3		$	163.6

Assets Held for Sale (Tables)

3 Months Ended

Mar. 31, 2012

Property, Plant and Equipment Assets Held-for-sale Disclosure [Abstract]

Disclosure of Long Lived Assets Held-for-sale [Table Text Block]

The current book values of assets held for sale by category is as follows:



Dollars in millions	March 31, 2012			December 31, 2011
Property, plant and equipment, at cost:
Land, land improvements and logging roads, net of road amortization	$	10.1		$	13.1
Buildings	17.1			22.9
Machinery and equipment	170.1			178.3
	197.3			214.3
Accumulated depreciation	(153.7		)	(162.4		)
Net property, plant and equipment	$	43.6		$	51.9

Income Taxes (Tables)

3 Months Ended

Mar. 31, 2012

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The income tax components and associated effective income tax rates for the three months ended March 31, 2012 and 2011 are as follows:



	Quarter Ended March 31,
	2012					2011
Dollars in millions	Tax Benefit			Tax Rate		Tax Benefit			Tax Rate
Continuing operations	$	(1.2	)	9	%	$	(6.8	)	23	%
Discontinued operations	(0.1		)	35	%	—			—	%
	$	(1.3	)	10	%	$	(6.8	)	23	%

Long-term Debt (Tables)

3 Months Ended

Mar. 31, 2012

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

LP’s long-term debt consists of the following:



Dollars in millions	March 31, 2012			December 31, 2011
Debentures:
Senior secured notes, maturing 2017	$	191.2		$	189.6
Bank credit facilities:
Chilean term credit facility, maturing 2019, denominated in UF	43.7			40.5
Brazilian export financing facility, maturing 2017	10.0			10.0
Limited recourse notes payable:
Senior notes, payable 2012	7.9			7.9
Senior notes, payable 2013 - 2018	112.0			112.0
Other financing
Non-recourse notes, payable 2018	368.7			368.7
Other	0.3			0.4
Total	733.8			729.1
Less: current portion	(14.5		)	(13.2		)
Net long-term portion	$	719.3		$	715.9

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 6
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

+ Details

Other Operating Credits and Charges, Net (Tables)

3 Months Ended

Mar. 31, 2012

Other Operating Credits And Charges, Net [Abstract]

Other Operating Credits and Charges Net [Table Text Block]



	Quarter Ended March 31,
Dollar amounts in millions	2012			2011
Severance	$	(0.3	)	$	—
Construction related legal reserves	0.5			—
Settlement of legal claim	—			0.8
	$	0.2		$	0.8

Selected Segment Data (Tables)

3 Months Ended

Mar. 31, 2012

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]



	Quarter Ended March 31,
Dollar amounts in millions	2012			2011
Net sales:
OSB	$	149.0		$	132.1
Siding	113.1			106.2
Engineered Wood Products	48.6			48.3
South America	42.4			35.3
Other	10.0			10.5
Intersegment sales	(1.6		)	(0.7		)
	$	361.5		$	331.7
Operating profit (loss):
OSB	$	(0.3	)	$	(9.1	)
Siding	16.8			12.7
Engineered Wood Products	(2.8		)	(5.5		)
South America	3.1			3.6
Other	(0.7		)	(0.7		)
Other operating credits and charges, net	0.2			0.8
Loss on sale or impairment of long-lived assets	(0.1		)	(5.5		)
General corporate and other expenses, net	(20.1		)	(17.8		)
Foreign currency gains (losses)	(0.1		)	1.8
Investment income	4.2			4.0
Interest expense, net of capitalized interest	(12.6		)	(14.0		)
Loss from continuing operations before taxes	(12.4		)	(29.7		)
Benefit for income taxes	(1.2		)	(6.8		)
Loss from continuing operations	$	(11.2	)	$	(22.9	)

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Contingency Reserves (Tables)

3 Months Ended

Mar. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Schedule of Loss Contingencies by Contingency [Table Text Block]

LP maintains reserves for various contingent liabilities as follows:



Dollar amounts in millions	March 31, 2012			December 31, 2011
Environmental reserves	$	14.6		$	15.0
Hardboard siding reserves	6.1			6.2
Total contingency reserves	20.7			21.2
Current portion of contingency reserves	(4.0		)	(4.0		)
Long-term portion of contingency reserves	$	16.7		$	17.2

Settlement Agreement Reserve Rollforward [Table Text Block]

The activity in the portion of LP's loss contingency reserves relating to hardboard siding contingencies for the first three months of 2012 and 2011 are summarized in the following table.



Dollar amounts in millions	March 31, 2012			March 31, 2011
Beginning balance, December 31,	$	6.2		$	17.8
Payments made for claims	(0.1		)	(0.3		)
Payments made for administrative costs	—			(0.1		)
Ending balance	$	6.1		$	17.4

- Definition

Tabular disclosure of the loss contingencies that were reported in the period or disclosed as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9-12, 22-40
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Paragraph 4
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-Publisher FASB
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12021-110248

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14615-108349

+ Details

Defined Benefit Pension Plans (Tables)

3 Months Ended

Mar. 31, 2012

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The net periodic pension cost included the following components:



	Quarter Ended March 31,
Dollar amounts in millions	2012			2011
Service cost	$	0.9		$	0.8
Interest cost	3.7			4.0
Expected return on plan assets	(4.3		)	(4.5		)
Amortization of prior service cost	0.1			0.1
Amortization of net loss	1.7			1.1
Net periodic pension cost	$	2.1		$	1.5

- Definition

Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 4, 7, 16, 20, 21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Guarantees and Indemnifications (Tables)

3 Months Ended

Mar. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

The activity in warranty reserves for the first three months of 2012 and 2011 are summarized in the following table:



	Quarter Ended March 31,
Dollar amounts in millions	2012			2011
Beginning balance	$	30.3		$	29.5
Accrued to expense	0.3			1.1
Payments made	(2.7		)	(2.3		)
Total warranty reserves	27.9			28.3
Current portion of warranty reserves	(12.0		)	(10.0		)
Long-term portion of warranty reserves	$	15.9		$	18.3

Basis For Presentation (Details)	3 Months Ended
Basis For Presentation (Details)	Mar. 31, 2012
Maximum [Member]
Percentage Used To Determine Noncontrolling Interest Presentation	1.00

Stock-Based Compensation (Details) $ in Millions	3 Months Ended
Stock-Based Compensation (Details) $ in Millions	Mar. 31, 2012 USD ($) years	Mar. 31, 2011 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 2.7	$ 3.5
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	0.4
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 4.5
Weighted-average period of years costs are expected to be recognied over \| years	1.8
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	$ 0.8	$ 0.4

- Definition

Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset.

+ References + Details

Stock-Based Compensation Valuation Assumptions (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2012 USD ($) years $ / shares	Mar. 31, 2011 USD ($) years $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 2.7	$ 3.5
Options and Ssars [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected stock price volatility	63.30%	64.20%
Expected dividend yield	0.00%	0.00%
Risk-free interest rate	0.70%	2.10%
Expected life of options \| years	5	5
Weighted average fair value of options and SSARs granted \| $ / shares	$ 4.68	$ 5.68
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1.0	$ 2.0

Stock-Based Compensation Outstanding Options and SSARs (Details) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2012 USD ($) years $ / shares shares	Dec. 31, 2011 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Beginning balance	8,315
Incentive shares granted	822
Options / SSARs exercised	(80)
Options / SSARs cancelled	(16)
Ending balance	9,041
Options / SSARs outstanding Weighted Average Exercise Price \| $ / shares	$ 12.47	$ 12.78
SSARs granted Weighted Average Exercise Price \| $ / shares	8.84
Options / SSARs exercised Weighted Average Exercise Price \| $ / shares	6.97
Options / SSARs cancelled Weighted Average Exercise Price \| $ / shares	$ 14.45
Options / SSARs outstanding Weighted Average Contractual Term (in years) \| years	6.4
Options / SSARs outstanding Aggregate Intrinsic Value (in millions) \| $	$ 16.2
Vested and expected to vest	8,589
Vested and expected to vest Aggregate Intrinsic Value (in millions) \| $	$ 15.4
Options / SSARs exercisable	7,276
Options / SSARs exercisable Weighted Average Exercise Price \| $ / shares	$ 13.36
Options / SSARs exercisable Aggregate Intrinsic Value (in millions) \| $	$ 14.8
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Starting Term When Options Become Exercisable After Grant Date	3 months
Stock Options [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Number of months for options to vest at an incremental rate of ten percent for directors	3 months
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 \| years	2.1
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost \| $	$ 1.5
Unrecognized compensation costs \| $	$ 5.9
Shares available under stock award plans	3,400
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Years SSARs become ratably exercisable over	3 years
Years until SSARs expire	P10Y

Stock-Based Compensation Restricted Stock Units (Details) $ in Millions	3 Months Ended
	Mar. 31, 2012 USD ($) years shares	Mar. 31, 2011 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Incentive shares granted	822,000
Ending balance	352,178
Share Based Compensation Arrangement by Share Based Payment Award, Options And Ssars, Outstanding, Intrinsic Value \| $	$ 16.2
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost \| $	$ 0.8	$ 0.4
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Beginning balance	1,112,868
Incentive shares granted	314,552
Incentive share awards vested	(407,909)
Incentive share awards cancelled	(19,362)
Ending balance	1,000,149
Incentive share awards outstanding Weighted Average Contractual Term (in years) \| years	1.82
Share Based Compensation Arrangement by Share Based Payment Award, Options And Ssars, Outstanding, Intrinsic Value \| $	$ 9.4
Vested and expected to vest	950,142
Vested and expected to vest Weighted Average Contractual Term (in years) \| years
Vested and expected to vest Aggregate Intrinsic Value (in millions) \| $	$ 8.9
Incentive share awards exercisable	0
Incentive share awards exercisable Weighted Average Contractual Term (in years) \| years	0
Incentive share awards exercisable Aggregate Intrinsic Value (in millions) \| $	$ 0.0

Stock-Based Compensation Restricted and Phantom Stock (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2012 USD ($) years $ / shares shares	Dec. 31, 2011 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Restricted stock awards granted	822,000
Ending balance	352,178
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost \| $	$ 0.4
Phantom Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Ending balance	39,944
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 \| years	1.1
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Beginning balance	760,728
Restricted stock awards granted	177,196
Restrictions lapsing	(405,750)
Ending balance	532,174
Restricted stock awards outstanding \| $ / shares	$ 8.49	$ 5.04
Restricted stock awards granted Weighted Average Grate Date Fair Value \| $ / shares	8.84
Restrictions lapsing Weighted Average Grant Date Fair Value \| $ / shares	$ 2.17
Director [Member] \| Phantom Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [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

Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Assets, Fair Value Disclosure [Abstract]
Available for sale securities	$ 1.0	$ 0.7
Trading securities	2.9	2.7
Total	3.9	3.4
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets, Fair Value Disclosure [Abstract]
Available for sale securities	0.0	0.0
Trading securities	2.9	2.7
Total	2.9	2.7
Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Available for sale securities	0.0	0.0
Trading securities	0.0	0.0
Total	0.0	0.0
Significant Unobservable Inputs (Level 3) [Member]
Assets, Fair Value Disclosure [Abstract]
Available for sale securities	1.0	0.7
Trading securities	0.0	0.0
Total	$ 1.0	$ 0.7

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References + Details

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Trading Securities which consist of all investments in certain debt and equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected.

+ References + Details

Fair Value Measurements Unobservable Inputs Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
The amount of total losses for the period included in net loss attributable to the fair value of changes in assets still held	$ 0.0	$ 0.0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0.7
Total realized/unrealized gains (losses) Included in other comprehensive income	0.3	$ 2.9
Ending balance	$ 1.0

Fair Value Measurements Impairment losses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Gain (loss) on sale or impairment of long lived assets, net	$ (0.1)	$ (5.5)
Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Impairment charge of assets no longer used		3.6
Impairment of Long-Lived Assets Held-for-use		$ 1.9

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 26
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 7, 25
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6390789&loc=d3e2420-110228

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-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 958
-SubTopic 225
-Section 45
-Paragraph 11
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6743430&loc=d3e92212-112881

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Impairment
-URI http://asc.fasb.org/extlink&oid=6515133

+ Details

Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Loss Attributed to LP Common Shares [Abstract]
Income (loss) from continuing operations	$ (11.2)	$ (23.0)
Loss from discontinued operations	(0.1)	0.0
Net income (loss)	$ (11.3)	$ (23.0)
Denominator:
Basic - weighted average common shares outstanding	136.6	131.3
Dilutive effect of stock warrants	0.0	0.0
Dilutive effect of stock plans	0.0	0.0
Diluted shares outstanding	136.6	131.3
Basic earnings per share:
Income (loss) from continuing operations	$ (0.08)	$ (0.18)
Loss from discontinued operations	0.00	0.00
Net income (loss) per share	(0.08)	(0.18)
Diluted earnings per share:
Income (loss) from continuing operations	(0.08)	(0.18)
Loss from discontinued operations	0.00	0.00
Net income (loss) per share	$ (0.08)	$ (0.18)
Antidilutive securities excluded from computation of earnings per share	7.4	9.6

Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Receivables [Abstract]
Trade receivables	$ 97.2	$ 55.9
Interest receivables	3.3	1.2
Other receivables	8.1	9.1
Allowance for doubtful accounts	(1.2)	(1.1)
Total	$ 107.4	$ 65.1

Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Inventory Disclosure [Abstract]
Finished products	$ 139.3	$ 109.6
Supplies	10.3	9.5
LIFO reserve	(0.6)	(0.6)
Total	212.3	163.6
Logs [Member]
Inventory Disclosure [Abstract]
Logs	41.8	26.5
Other Raw Materials [Member]
Inventory Disclosure [Abstract]
Logs	$ 21.5	$ 18.6

- Definition

Carrying amount as of the balance sheet date of products used directly or indirectly in the manufacturing or production process, which may or may not become part of the final product. May also include items used in the storage, presentation or transportation of physical goods.

+ References + Details

Assets Held for Sale (Details) - USD ($) $ in Millions	3 Months Ended
Assets Held for Sale (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Proceeds from sales of assets	$ 8.9	$ 0.0
Property, plant and equipment held for sale [Abstract]
Assets held-for-sale, property, plant and equipment	197.3		$ 214.3
Assets held for sale acumulated depreciation	(153.7)		(162.4)
Assets Held For Sale Property Plant and Equipment Net	43.6		51.9
Land Land Improvements And Logging Roads Net of Road Amortization [Member]
Property, plant and equipment held for sale [Abstract]
Assets held-for-sale, property, plant and equipment	10.1		13.1
Building [Member]
Property, Plant and Equipment [Line Items]
Proceeds from sales of assets	8.5
Property, plant and equipment held for sale [Abstract]
Assets held-for-sale, property, plant and equipment	17.1		22.9
Machinery and Equipment [Member]
Property, plant and equipment held for sale [Abstract]
Assets held-for-sale, property, plant and equipment	$ 170.1		$ 178.3

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%
Continuing operations tax benefit	$ (1.2)	$ (6.8)
Discontinued operations tax benefit	(0.1)	0.0
Total tax benefit	$ (1.3)	$ (6.8)
Continuing operations effective tax rate	9.00%	23.00%
Discontinued operation effective tax rate	35.00%	0.00%
Total effective tax rate	10.00%	23.00%

- Definition

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 46
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b),(c)
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6909487&loc=d3e38679-109324

+ Details

Long-term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Notes and Loans Payable [Abstract]
Notes Payable	$ 7.9	$ 7.9
Other	0.3	0.4
Total	733.8	729.1
Less: current portion	(6.6)	(5.3)
Net long-term portion	719.3	715.9
Senior Secured Notes Maturing 2017 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	191.2	189.6
Chilian Term Credit Facility Maturing 2019 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	43.7	40.5
Brazilian Term Credit Facility Maturing 2017 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	10.0	10.0
Senior Notes Payable 2012 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	7.9	7.9
Senior Notes Payable 2013 Thru 2018 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	112.0	112.0
Non Recourse Notes Payable 2018 [Member]
Notes and Loans Payable [Abstract]
Notes Payable	368.7	368.7
Recourse and non recourse [Member]
Notes and Loans Payable [Abstract]
Less: current portion	$ (14.5)	$ (13.2)

Long-term Debt Issuance (Details) $ in Millions	3 Months Ended
Long-term Debt Issuance (Details) $ in Millions	Mar. 31, 2012 CLP ($) payments	Mar. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2003 USD ($)	Dec. 31, 1998 USD ($)	Dec. 31, 1997 USD ($)
Debt Instrument [Line Items]
Notes Payable		$ 7.9	$ 7.9
Notes receivable used as collateral on loan		9.9
Chilean Bank Loan [Member]
Debt Instrument [Line Items]
Number of Future Semi Annual Payments \| payments	16
Principal paid on debt	$ 0
Brazilian Term Credit Facility Maturing 2017 [Member]
Debt Instrument [Line Items]
Notes Payable		10.0	10.0
Number of Future Semi Annual Payments \| payments	10
Senior Notes Payable 2012 [Member]
Debt Instrument [Line Items]
Amount of loan issuance						$ 47.9
Notes Payable		7.9	7.9
Senior Notes Payable 2013 Thru 2018 [Member]
Debt Instrument [Line Items]
Amount of loan issuance					$ 348.6
Notes Payable		112.0	112.0
Maturity in 2013		90.0
Maturity in 2018		22.0
Notes receivable used as collateral on loan		$ 113.7
Amount of indebtedness liable for in event of default of notes receivable collateral	10.00%	10.00%
Non Recourse Notes Payable 2018 [Member]
Debt Instrument [Line Items]
Amount of loan issuance				$ 368.7
Notes Payable		$ 368.7	368.7
Notes receivable used as collateral on loan		$ 410.0
Amount of indebtedness liable for in event of default of notes receivable collateral	10.00%	10.00%
Senior Secured Notes Maturing 2017 [Member]
Debt Instrument [Line Items]
Notes Payable		$ 191.2	189.6
Fair value of debt		$ 236.0	$ 243.0

Other Operating Credits and Charges, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Gain Contingencies [Line Items]
Reversal of severance		$ 0.0
Settlement of legal claim	$ 0.0	0.8
Other operating credits and charges, net	(0.2)	(0.8)
Other Operating Income (Expense), Net	0.2	0.8
OSB Mills Construction Related Legal Reserves [Member]
Gain Contingencies [Line Items]
Reversal of severance	(0.3)
Construction related legal reserves	$ 0.5	$ 0.0

- Definition

The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 3, 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS146-1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5-8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 112
-Paragraph 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 146
-Paragraph 8-13, 20
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.P.3)
-URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140864-122747

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140904-122747

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(10)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

+ Details

Transactions with Affiliates (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Related Party Transaction [Line Items]
Ownership in affiliates	50.00%
Due from affiliates	$ 1.2		$ 0.5
Due to affiliates	5.3		$ 2.3
AbitibiBowater-LP [Member]
Related Party Transaction [Line Items]
Revenue from affiliates	1.6	$ 1.4
AbitibiBowater-LP [Member] \| I Joist [Member]
Related Party Transaction [Line Items]
Expenses from affiliates	7.8	7.6
Canfor-LP [Member] \| OSB [Member]
Related Party Transaction [Line Items]
Expenses from affiliates	$ 26.9	$ 24.6

Selected Segment Data (Details) - USD ($) $ in Millions	3 Months Ended
Selected Segment Data (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting Information [Line Items]
Net sales:	$ 361.5	$ 331.7
Operating profit (loss):	(2.1)	(18.2)
Other operating credits and charges, net	0.2	0.8
Gain (loss) on sale or impairment of long-lived assets	(0.1)	(5.5)
General corporate and other expenses, net	(20.1)	(17.8)
Foreign currency gains (losses)	(0.1)	1.8
Investment income	4.2	4.0
Interest expense, net of capitalized interest	(12.6)	(14.0)
Loss from continuing operations before taxes	(12.4)	(29.7)
Provision (benefit) for income taxes	(1.2)	(6.8)
Income (loss) from continuing operations	(11.2)	(22.9)
OSB [Member]
Segment Reporting Information [Line Items]
Net sales:	149.0	132.1
Operating profit (loss):	(0.3)	(9.1)
Siding [Member]
Segment Reporting Information [Line Items]
Net sales:	113.1	106.2
Operating profit (loss):	16.8	12.7
Engineered Wood Products [Member]
Segment Reporting Information [Line Items]
Net sales:	48.6	48.3
Operating profit (loss):	(2.8)	(5.5)
South America [Member]
Segment Reporting Information [Line Items]
Net sales:	42.4	35.3
Operating profit (loss):	3.1	3.6
Other [Member]
Segment Reporting Information [Line Items]
Net sales:	10.0	10.5
Operating profit (loss):	(0.7)	(0.7)
Intersegment elimination [Member]
Segment Reporting Information [Line Items]
Net sales:	$ (1.6)	$ (0.7)

Potential Impairments Potential impairments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2012 USD ($)
Asset Impairment Charges [Abstract]
Tangible Asset Impairment Charges	$ 0

Contingency Reserves (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2010	Dec. 31, 2009
Loss Contingencies [Line Items]
Loss contingency accrual	$ 20.7	$ 21.2
Current portion of contingency reserves	(4.0)	(4.0)
Long-term portion of contingency reserves	16.7	17.2
Environmental reserves [Member]
Loss Contingencies [Line Items]
Loss contingency accrual	14.6	15.0
Hardboard Siding Reserves [Member]
Loss Contingencies [Line Items]
Loss contingency accrual	$ 6.1	$ 6.2	$ 17.4	$ 17.8

Contingency Reserves Hardboard Contingencies Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Loss Contingency Accrual [Roll Forward]
Beginning Balance	$ 21.2
Ending Balance	20.7
Hardboard Siding Reserves [Member]
Loss Contingency Accrual [Roll Forward]
Beginning Balance	6.2
Payments made for claims	(0.1)	$ (0.3)
Payments made for administrative costs	0.0	$ (0.1)
Ending Balance	$ 6.1

Defined Benefit Pension Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 0.9	$ 0.8
Interest cost	3.7	4.0
Expected return on plan assets	(4.3)	(4.5)
Amortization of prior service cost	0.1	0.1
Amortization of net loss	1.7	1.1
Net periodic pension cost	2.1	1.5
Pension expense	2.1	$ 1.5
Pension Contributions	0.5
Defined Benefit Plan, Expected Future Benefit Payments in Year One	$ 0.5

Guarantees and Indemnifications (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Jun. 30, 2011	Sep. 30, 2010	Jun. 30, 2010
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Accrued to expense	$ 0.3	$ 1.1
Payments made	(2.7)	$ (2.3)
Ending Balance	27.9		$ 30.3	$ 28.3	$ 29.5
Current portion of warranty reserves	(12.0)			(10.0)
Long-term portion of warranty reserves	$ 15.9			$ 18.3

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details

Label	Element	Value
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	$ 11,600,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	$ 14,500,000