BUSINESS SEGMENT INFORMATION, ASSETS (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 42,376	$ 22,800
Operating Segments | Packaging Solutions North America
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	16,688	14,501
Operating Segments | Packaging Solutions EMEA
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	18,789	1,276
Operating Segments | Global Cellulose Fibers
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	2,800	2,857
Corporate and other | Corporate and other
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 4,099	$ 4,166