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Guarantees and Indemnifications (Details) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended				12 Months Ended
	Dec. 31, 2013 USD ($)	Sep. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2002 CAD	Dec. 31, 2014 Damages from Product Defects USD ($)	Dec. 31, 2013 Damages from Product Defects USD ($)	Dec. 31, 2012 Damages from Product Defects USD ($)
Product Liability Contingency [Line Items]
Indemnity							15.0lpx_Indemnity
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning Balance				29.3us-gaap_ProductWarrantyAccrual	21.4us-gaap_ProductWarrantyAccrual	30.3us-gaap_ProductWarrantyAccrual
Accrued to expense	(11.6)us-gaap_ProductWarrantyAccrualWarrantiesIssued	(2.0)us-gaap_ProductWarrantyAccrualWarrantiesIssued	(4.1)us-gaap_ProductWarrantyAccrualWarrantiesIssued	(3.6)us-gaap_ProductWarrantyAccrualWarrantiesIssued	(2.7)us-gaap_ProductWarrantyAccrualWarrantiesIssued	(4.5)us-gaap_ProductWarrantyAccrualWarrantiesIssued		3.0us-gaap_ProductWarrantyAccrualWarrantiesIssued / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_DamagesFromProductDefectsMember	(2.0)us-gaap_ProductWarrantyAccrualWarrantiesIssued / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_DamagesFromProductDefectsMember	(3.6)us-gaap_ProductWarrantyAccrualWarrantiesIssued / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_DamagesFromProductDefectsMember
Adjustment related to product related warranty reserves				11.3us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease	17.7us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease	1.8us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease
Product Warranty Accrual, Currency Translation, Increase (Decrease)				(1.2)us-gaap_ProductWarrantyAccrualCurrencyTranslationIncreaseDecrease
Payments made				(11.6)us-gaap_ProductWarrantyAccrualPayments	(12.5)us-gaap_ProductWarrantyAccrualPayments	(11.6)us-gaap_ProductWarrantyAccrualPayments
Ending Balance	29.3us-gaap_ProductWarrantyAccrual			31.4us-gaap_ProductWarrantyAccrual	29.3us-gaap_ProductWarrantyAccrual	21.4us-gaap_ProductWarrantyAccrual
Current portion of warranty reserves	(12.0)us-gaap_ProductWarrantyAccrualClassifiedCurrent			(12.0)us-gaap_ProductWarrantyAccrualClassifiedCurrent	(12.0)us-gaap_ProductWarrantyAccrualClassifiedCurrent	(12.0)us-gaap_ProductWarrantyAccrualClassifiedCurrent
Long-term portion of warranty reserves	$ 17.3us-gaap_ProductWarrantyAccrualNoncurrent			$ 19.4us-gaap_ProductWarrantyAccrualNoncurrent	$ 17.3us-gaap_ProductWarrantyAccrualNoncurrent	$ 9.4us-gaap_ProductWarrantyAccrualNoncurrent

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- Definition

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- 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.

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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).

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Total Increase or Decrease in the standard and extended product warranty liability due to currency translation.

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Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers.

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Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties.

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Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard and extended product warranties (including adjustments for changes in estimates).

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Represents the aggregate increase in the liability for accruals related to standard and extended product warranties issued during the reporting period.

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