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Other Operating Credits and Charges, Net severance (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Reserves For Timber Obligations	$ 0lpx_ReservesForTimberObligations	$ 0lpx_ReservesForTimberObligations	$ 0.8lpx_ReservesForTimberObligations
Addition to environmental related contingency reserves	(0.5)us-gaap_AccrualForEnvironmentalLossContingenciesProvisionForNewLosses	(1.0)us-gaap_AccrualForEnvironmentalLossContingenciesProvisionForNewLosses	0us-gaap_AccrualForEnvironmentalLossContingenciesProvisionForNewLosses
Restructuring Reserve [Roll Forward]
Reductions, net of additions, to product related contingency reserves	0us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease	0us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease	(5.0)us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease
Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	0.7us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember	0.7us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember	1.5us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember
Charged to expense, continuing operations	0.8us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember	0.8us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember	1.0us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember
Payments	(1.1)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember	(0.8)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember	(1.8)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember
Ending Balance	$ 0.4us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember	$ 0.7us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember	$ 0.7us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember

X

- Definition

Gain for Reductions in Reserves Associated With Canadian Timber Obligations

+ References

No definition available.

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X

- Definition

The amount added to the accrual for newly incurred environmental loss contingencies. These additions include remediation expense and interest accretion. These additions do not relate to changes in the environmental accrual related to a business acquisition or divestiture, to currency movements, or revisions in previously existing estimates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 5.Y.Q2)

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- Definition

Amount of increase (decrease) in loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

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-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

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-Paragraph 28

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-Paragraph 1

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: 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=27011515&loc=d3e140904-122747



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