RESTRUCTURING AND OTHER CHARGES (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	$ 105			$ 21	$ 131	$ 21
Corporate and Other [Member] | Early Debt Extinguishment Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	$ 105	$ 18	$ 8
Corporate and Other [Member] | Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net				11
Printing Papers | Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net				6
Global Cellulose Fibers [Member] | Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net				$ 4