SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION - Inventories (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$ 56	$ 60
Finished paper and pulp products	178	213
Operating supplies	107	109
Other	20	22
Total	$ 361	404
Inventory, LIFO reserve percentage	62.00%
Last-in, first-out inventory reserve	$ 72	81
Effect of LIFO Inventory Liquidation on Income	$ 12	$ 2