EXIT ACTIVITIES - Additional Information (Details) $ in Millions		3 Months Ended
	Feb. 07, 2023 Facility	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Facility Closing
Restructuring Cost and Reserve [Line Items]
Number of additional mills expected to close | Facility	2
Exit costs associated with restructuring		$ 18	$ 21
Expected costs associated with closures associated with severance activity		21
Facility Closing | CRB Mills | Minimum
Restructuring Cost and Reserve [Line Items]
Incurred charges related to write-off of assets		25
Accelerated depreciation related to plant closure		16
Facility Closing | CRB Mills | Maximum
Restructuring Cost and Reserve [Line Items]
Incurred charges related to write-off of assets		30
Accelerated depreciation related to plant closure		20
Facility Closing | Folding Carton Plant | Minimum
Restructuring Cost and Reserve [Line Items]
Incurred charges related to write-off of assets		20
Accelerated depreciation related to plant closure		25
Facility Closing | Folding Carton Plant | Maximum
Restructuring Cost and Reserve [Line Items]
Incurred charges related to write-off of assets		22
Accelerated depreciation related to plant closure		27
Facility Closing | Construction in Progress | Folding Carton Plant
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation related to plant closure		24
Start-Up Costs | Minimum
Restructuring Cost and Reserve [Line Items]
Start-up charges		65
Start-Up Costs | Maximum
Restructuring Cost and Reserve [Line Items]
Start-up charges		75
Start-Up Costs | Construction in Progress
Restructuring Cost and Reserve [Line Items]
Start-up charges		21
Start-Up Costs | Construction in Progress | CRB Mills
Restructuring Cost and Reserve [Line Items]
Incurred charges related to write-off of assets		15
One-time Termination Benefits | Folding Carton Plant
Restructuring Cost and Reserve [Line Items]
Incurred charges related to write-off of assets		$ 18