Interim Financial Results (Footnotes) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021		Dec. 31, 2020
Business Acquisition [Line Items]
Restructuring and other charges, net									$ 89,000,000	$ 509,000,000		$ 195,000,000
Litigation reserve adjustments	$ 11,000,000	$ (15,000,000)	$ 0	$ 0	$ (5,000,000)	$ 0	$ 0	$ 0
Environmental remediation reserve adjustment	48,000,000	0	15,000,000	0	0	5,000,000	5,000,000	0
Net (gains) losses on sales of equity method investments									(10,000,000)	204,000,000		35,000,000
Net (gains) losses on mark to market investments	0	(16,000,000)	(3,000,000)	(46,000,000)	32,000,000	0	0	0	(65,000,000)	32,000,000		0
Other items	(4,000,000)	0	6,000,000	0	1,000,000	9,000,000	11,000,000	0
Asset Impairment Charges					0	0	21,000,000	0
Non-operating pension (income) expense	(48,000,000)	(48,000,000)	(47,000,000)	(49,000,000)	(47,000,000)	(50,000,000)	(51,000,000)	(52,000,000)	(192,000,000)	(200,000,000)		(41,000,000)
Pre-tax charges (gains)	96,000,000	69,000,000	(29,000,000)	(95,000,000)	248,000,000	(1,000,000)	17,000,000	(94,000,000)
Non-operating pension expense (income), tax	12,000,000	12,000,000	12,000,000	12,000,000	11,000,000	12,000,000	13,000,000	13,000,000
Other Tax Expense (Benefit)	42,000,000	(656,000,000)	(23,000,000)	23,000,000	(62,000,000)	0	(1,000,000)	25,000,000
Income Tax Provision Benefit Related To Special Items	(15,000,000)	(29,000,000)	(4,000,000)	11,000,000	(73,000,000)	(12,000,000)	(14,000,000)	12,000,000
Foreign valuation allowance	45,000,000	0	0	0					45,000,000	0		0
Net (gains) losses on sales and impairments of businesses									(76,000,000)	358,000,000		(465,000,000)
Increase (Decrease) in Income Taxes Receivable							70,000,000
Goodwill, Impairment Loss									76,000,000
Tax Benefit on Exchange of Sylvamo Shares									56,000,000
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest							1,000,000
Two Thousand And Fifteen Financing Entities [Member]
Business Acquisition [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions									252,000,000
Timber Monetization Audit Settlement	0	(604,000,000)	0	0					(604,000,000)	0		0
Income tax examination, penalties and interest Expense	3,000,000	55,000,000	0	0					58,000,000
Sylvamo Corporation Investment
Business Acquisition [Line Items]
Tax Benefit on Exchange of Sylvamo Shares	0	(35,000,000)	(31,000,000)	0						0		0
EMEA Industrial Packaging
Business Acquisition [Line Items]
Goodwill, Impairment Loss	76,000,000	0	0	0					76,000,000
Graphic Packaging LLC [Member] | Reportable Subsegments [Member]
Business Acquisition [Line Items]
Net (gains) losses on sales of equity method investments					0	0	(130,000,000)	(74,000,000)
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	10,000,000	0	0	0
Printing Papers [Member]
Business Acquisition [Line Items]
Non-operating pension (income) expense					0	0	(1,000,000)	(1,000,000)
Pre-tax charges (gains)					8,000,000	(331,000,000)	(28,000,000)	19,000,000
Printing Papers spin-off expenses					5,000,000	47,000,000	20,000,000	20,000,000
Tax Adjustments, Settlements, and Unusual Provisions					(3,000,000)	27,000,000	0	0
Net (gains) losses on sales of fixed assets					0	(65,000,000)	0	0
Increase (Decrease) in Income Taxes Receivable					0	10,000,000	(47,000,000)	0
Printing Papers [Member] | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member]
Business Acquisition [Line Items]
Net (gains) losses on sales of fixed assets										(86,000,000)		0
Kwidzyn Mill [Member]
Business Acquisition [Line Items]
Net (gains) losses on sales and impairments of businesses						(350,000,000)	0	0
Divestiture costs					6,000,000
Kwidzyn Mill [Member] | Discontinued Operations, Held-for-sale or Disposed of by Sale
Business Acquisition [Line Items]
Net (gains) losses on sales and impairments of businesses						404,000,000
Net (gains) losses on sales and impairments of businesses						360,000,000
Divestiture costs					9,000,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax						44,000,000
Olmuksan [Member]
Business Acquisition [Line Items]
Net (gains) losses on sales and impairments of businesses					0	0	9,000,000	(2,000,000)
Early debt extinguishment costs (see Note 13)
Business Acquisition [Line Items]
Restructuring and other charges, net	$ 0	$ 93,000,000	$ 0	$ 0	238,000,000	35,000,000	170,000,000	18,000,000	$ 93,000,000	461,000,000		$ 196,000,000
EMEA Industrial Packaging
Business Acquisition [Line Items]
Restructuring and other charges, net					0	0	0	12,000,000		12,000,000	[1]
Building a Better IP
Business Acquisition [Line Items]
Restructuring and other charges, net					$ 29,000,000	$ 0	$ 0	$ 0		$ 29,000,000	[2]

[1] Severance related to the optimization of our EMEA Packaging business. The majority of the severance charges were paid in 2022.

[2] Severance related to our Building a Better IP initiative which is focused on value creation through streamlined operations and process optimization. The majority of the severance charges were paid in 2022.