Other Operating Credits and Charges, Net (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Gain Contingencies [Line Items]
Reversal of severance		$ 0	$ (0.4)	$ 0
Addition to environmental reserves	0	0	(0.9)	0
Loss Contingency Accrual, Carrying Value, Period Increase (Decrease)	10.7	0	(10.7)	0
Timber related reserves	0	0	1.5	0
Settlement of legal claim	0	(2.2)	0.8	(2.3)
Other Cost and Expense, Operating	0	(0.1)	0	0.1
Other operating income (expense), net	9.8	(2.3)	11.2	(2.8)
OSB Mills Construction Related Legal Reserves [Member]
Gain Contingencies [Line Items]
Reversal of severance	(0.4)
Restructuring and Related Cost, Expected Cost	(1.4)
Construction related legal reserves	$ (0.5)	$ 0	$ (0.5)	$ (0.6)

Gain for Reductions in Reserves Associated With Canadian Timber Obligations

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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.

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The net proceeds or assets obtained in excess of (less than) the net carrying amount of assets recorded, or assets distributed and liabilities assumed less than (in excess of) estimated litigation liability extinguished, in settlement of a litigation matter. Represents (for other than an insurance entity in its normal claims settlement process), the amount of income (expense) recognized in the period to settle pending or threatened litigation and insurance claims.

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The increase (decrease) in the period in loss contingency liabilities.

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The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

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The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations.

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Amount expected to be charged against earnings in the current and future periods for the specified restructuring cost.

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