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ENVIRONMENTAL AND NATURAL RESOURCE DAMAGE LIABILITIES - Narrative (Details) | 12 Months Ended
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Dec. 31, 2020
Minimum | Millsite Cleanup And Natural Resource Damages Restoration |
Property, Plant and Equipment [Line Items] |
Natural resource damages restoration monitoring term | 2 years
Minimum | Port Gamble Location |
Property, Plant and Equipment [Line Items] |
Natural resource damages restoration monitoring term | 10 years
Maximum | Millsite Cleanup And Natural Resource Damages Restoration |
Property, Plant and Equipment [Line Items] |
Natural resource damages restoration monitoring term | 3 years
Maximum | Port Gamble Location |
Property, Plant and Equipment [Line Items] |
Natural resource damages restoration monitoring term | 15 years

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- Definition Environmental Loss Contingency, Restoration Term + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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