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.

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IMPAIRMENT OF LONG-LIVED ASSETS (Details) - USD ($) $ in Millions	12 Months Ended
	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