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Other Operating Credits and Charges, Net severance (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2011 | Jun. 30, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Severance [Member] | Dec. 31, 2011 Severance [Member] | Dec. 31, 2010 Severance [Member] | Mar. 31, 2012 OSB Mills Construction Related Legal Reserves [Member] | Sep. 30, 2011 OSB Mills Construction Related Legal Reserves [Member] | Dec. 31, 2011 OSB Mills Construction Related Legal Reserves [Member]
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reserves For Timber Obligations |  | $ 1.5 | $ 0.8 | $ 1.5 | $ 0 |  |  |  |  |  |
Accrual for Environmental Loss Contingencies, Provision for New Losses |  | 0.9 | 0 | (0.9) | 0 |  |  |  |  |  |
Severance Costs |  |  | 0.5 | 1.1 | 0 |  |  |  | 0.3 | (0.4) | (1.1)
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  |  |  | 1.5 | 0.6 | 2.1 |  |  |
Charged to expense, continuing operations |  |  |  |  |  | 1.0 | 1.9 | 0.5 |  |  |
Payments |  |  |  |  |  | (1.8) | (1.0) | (2.0) |  |  |
Ending Balance |  |  |  |  |  | 0.7 | 1.5 | 0.6 |  |  |
Reductions, net of additions, to product related contingency reserves | $ (10.7) |  | $ (5.0) | $ (11.5) | $ (2.5) |  |  |  |  |  |

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- 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) -URI http://asc.fasb.org/extlink&oid=6572457&loc=d3e149879-122751 + Details
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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 Emerging Issues Task Force (EITF) -Number 95-3 -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 SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 3: 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 + Details
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