OTHER OPERATING COSTS, NET - Income and Expense Items Included in Other Operating Costs, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Income [Abstract]
Foreign exchange losses (gains), net	$ (2)	$ 1	$ 3	$ 2
Litigation expense, net	7	25	9	59
Research and development expenses	1	1	4	4
Timber casualty loss	80	0	80	0
Other, net	6	6	17	20
Total other operating costs, net	$ 92	$ 33	$ 113	$ 85