OTHER OPERATING COSTS (INCOME), NET - Income and Expense Items Included in Other Operating Costs (Income), Net (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) a
Other Operating Income (Expense) [Line Items]
Environmental remediation insurance recoveries	$ 0	$ (5)	$ (42)
Foreign exchange losses (gains), net	2	(3)	(1)
Gain on disposition of nonstrategic assets	(4)	(5)	(16)
Gain on sale of timberlands	(48)	0	(99)
Litigation expense, net	63	35	20
Research and development expenses	6	8	14
Other, net	28	52	10
Total other operating costs (income), net	$ 47	$ 82	(114)
Twin Creeks
Other Operating Income (Expense) [Line Items]
Gain on sale of timberlands			$ (99)
Sale of timberland acreage | a			100,000