REVENUE RECOGNITION (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Revenue from External Customer [Line Items]
NET SALES	$ 846	$ 965	$ 2,461	$ 2,803
Other Current Liabilities
Revenue from External Customer [Line Items]
Contract liabilities	3		3		$ 2
Europe Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	184	193	555	605
Latin America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	212	240	599	683
North America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	450	532	1,307	1,515
Uncoated Papers | Europe Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	161	168	493	534
Uncoated Papers | Latin America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	200	223	561	639
Uncoated Papers | North America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	429	510	1,244	1,455
Market Pulp | Europe Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	23	25	62	71
Market Pulp | Latin America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	12	17	38	44
Market Pulp | North America Segment [Member]
Revenue from External Customer [Line Items]
NET SALES	$ 21	$ 22	$ 63	$ 60