OTHER OPERATING COSTS, NET - Additional Information (Details) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2020 a	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Component Of Other Operating Costs [Line Items]
Timber casualty loss		$ 80	$ 0	$ 80	$ 0
Minimum
Component Of Other Operating Costs [Line Items]
Estimate of possible increase in timber casualty loss		30
Maximum
Component Of Other Operating Costs [Line Items]
Estimate of possible increase in timber casualty loss		$ 40
Oregon
Component Of Other Operating Costs [Line Items]
Number of acres of timberlands approximately affected by forest fires | a	125,000