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IMPAIRMENT OF LONG-LIVED ASSETS (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |
Impairment of long-lived assets | $ (92.0) | $ (11.0) |
Loss on facility previously held for sale | 5.0 |  |
Impairment of long-lived assets |  |  | $ 9.0
Impaired Assets to be Disposed of by Method Other than Sale, Amount of Impairment Loss | 4.0 |  |
Other |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |
Impairment of long-lived assets | 47.0 |  |
EWP |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |
Impairment of long-lived assets | 39.0 |  |
Siding |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |
Impairment of long-lived assets | $ 5.0 |  |

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- Definition Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Loss recognized as a result of the initial and subsequent write-down of a long-lived asset's carrying amount to fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 + Details
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- Definition For the asset that is reclassified back to held and used from held-for-sale, the amount of impairment charge that is recognized on the reclassification date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 35 -Paragraph 44 -URI http://asc.fasb.org/extlink&oid=29634951&loc=d3e1756-110224 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2459-110228 + Details
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