REVENUE RECOGNITION (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Revenue from External Customer [Line Items]
NET SALES	$ 755	$ 821
Other Current Liabilities
Revenue from External Customer [Line Items]
Contract with Customer, Liability	2		$ 3
Europe Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	188	190
Latin America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	177	193
North America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	390	438
Uncoated Papers | Europe Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	165	170
Uncoated Papers | Latin America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	167	180
Uncoated Papers | North America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	373	417
Market Pulp | Europe Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	23	20
Market Pulp | Latin America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	10	13
Market Pulp | North America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	$ 17	$ 21