RESTRUCTURING CHARGES, NET (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	$ 39	$ 0	$ 122	$ 3
Red River Containerboard Mill | Packaging Solutions North America
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	7		85
Severance costs			17
Inventory write-down	3		25
Other restructuring costs	4		43
80/20 Strategic Approach | Packaging Solutions North America
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	$ 32		$ 37