REVENUE RECOGNITION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue from External Customer [Line Items]
NET SALES	$ 3,351	$ 3,773	$ 3,721
Contract liabilities	3	2
Europe
Revenue from External Customer [Line Items]
NET SALES	739	799	821
Latin America
Revenue from External Customer [Line Items]
NET SALES	858	945	949
North America
Revenue from External Customer [Line Items]
NET SALES	1,754	2,029	1,951
Uncoated Papers | Europe
Revenue from External Customer [Line Items]
NET SALES	656	703	733
Uncoated Papers | Latin America
Revenue from External Customer [Line Items]
NET SALES	809	884	885
Uncoated Papers | North America
Revenue from External Customer [Line Items]
NET SALES	1,678	1,951	1,891
Market Pulp | Europe
Revenue from External Customer [Line Items]
NET SALES	83	96	88
Market Pulp | Latin America
Revenue from External Customer [Line Items]
NET SALES	49	61	64
Market Pulp | North America
Revenue from External Customer [Line Items]
NET SALES	$ 76	$ 78	$ 60