(Restructuring and Related Costs Tables) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net		$ (221)	$ (99)	$ (89)
Restructuring and other charges, net		221	99	89
Early debt extinguishment costs (see Note 13)
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net				(93)
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net		(3)		$ (4)
Building a Better IP | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	[1]		(19)
Orange, Texas mill
Restructuring Cost and Reserve [Line Items]
Severance costs			25
Inventory Write-down			30
Restructuring and other charges, net			26
Orange, Texas mill | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	[2]		(81)
Pensacola Mill and Riegelwood Mill
Restructuring Cost and Reserve [Line Items]
Severance costs			21
Inventory Write-down			12
Restructuring and other charges, net			4
Pensacola Mill and Riegelwood Mill | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	[3]		$ (37)
Georgetown, South Carolina mill
Restructuring Cost and Reserve [Line Items]
Severance costs		39
Inventory Write-down		34
Restructuring and other charges, net		46
Georgetown, South Carolina mill | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	[4]	(119)
80/20 Strategic Approach | Corporate Segment
Restructuring Cost and Reserve [Line Items]
Severance costs		61
80/20 Strategic Approach | Industrial Packaging
Restructuring Cost and Reserve [Line Items]
Severance costs		42
80/20 Strategic Approach | Global Cellulose Fibers
Restructuring Cost and Reserve [Line Items]
Severance costs		2
80/20 Strategic Approach | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	[5]	$ (105)

[1] (c) Revision of severance estimates related to our Building a Better IP initiative.

[2] (a) Includes $25 million of severance charges, $30 million of inventory charges and $26 million of other costs associated with the closure of our containerboard mill in Orange, Texas. The majority of the severance charges were paid in 2024.

[3] (b) Includes $21 million of severance charges, $12 million of inventory charges and $4 million of other costs associated with the permanent shutdown of pulp machines at our Riegelwood, North Carolina and Pensacola, Florida mills. The majority of the severance charges were paid in 2024.

[4] b) Includes $39 million of severance charges recorded in Accrued payroll and benefits in the accompanying consolidated balance sheet, $34 million of inventory charges recorded in Inventories in the accompanying consolidated balance sheet and $46 million of other costs recorded in Other current liabilities and Other Liabilities in the accompanying consolidated balance sheet, associated with the permanent closure of our Georgetown, South Carolina mill. The majority of the severance charges will be paid in 2025.

[5] (a) Severance and other costs related to the resource alignment component of our 80/20 strategic approach. These severance and other costs include $61 million, $42 million and $2 million in the Corporate, Industrial Packaging and Global Cellulose Fibers segments, respectively. The severance charges are recorded in Accrued payroll and benefits and Other Liabilities in the accompanying consolidated balance sheet. The majority of these charges will be paid in 2025.