OTHER OPERATING COSTS (INCOME), NET - Income and Expense Items Included in Other Operating Costs (Income), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income [Abstract]
Foreign exchange losses (gains), net	$ (5)	$ (2)	$ (2)	$ 3
Gain on sale of timberlands (Note 14)	(32)	0	(32)	0
Litigation expense, net	5	7	11	9
Product remediation recovery	0	0	0	(8)
Research and development expenses	1	1	3	4
Timber casualty loss (Note 15)	0	80	0	80
Other, net	16	6	28	17
Total other operating costs (income), net	$ (15)	$ 92	$ 8	$ 105