(Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2022		Sep. 30, 2022		Jun. 30, 2022		Mar. 31, 2022		Dec. 31, 2021	[2]	Sep. 30, 2021	[2]	Jun. 30, 2021	[2]	Mar. 31, 2021	[2]	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Income Tax Disclosure [Abstract]
Earnings (loss) from continuing operations before income taxes and equity earnings	$ 322	[1]	$ 313	[1]	$ 514	[1]	$ 362	[1]	$ 44		$ 397		$ 252		$ 306		$ 1,511	[1]	$ 999	[2]	$ 329
Statutory U.S. income tax rate																	21.00%		21.00%		21.00%
Tax expense (benefit) using statutory U.S. income tax rate																	$ 317		$ 210		$ 69
State and local income taxes																	44		15		26
Impact of rate differential on non-U.S. permanent differences and earnings																	1		5		29
Foreign valuation allowance	45		0		0		0										45		0		0
Tax Benefit on Exchange of Sylvamo Shares																	(56)
Adjustment to tax basis of assets																	0		(14)		0
Non-deductible business expenses																	2		1		4
Non-deductible impairments																	16		0		92
Non-deductible compensation																	13		11		11
Tax audits																	6		(9)		28
U.S. federal tax rate change																	0		0		7
Foreign derived intangible income deduction																	(8)		(7)		0
US tax on non-U.S. earnings (GILTI and Subpart F)																	27		5		6
Foreign tax credits																	(8)		(6)		(3)
General business and other tax credits																	(43)		(39)		(42)
Tax expense (benefit) on equity earnings																	(1)		0		8
Other, net																	(3)		(2)		(3)
Income tax provision (benefit)																	$ (236)		$ 188		$ 176
Effective income tax rate																	(16.00%)		19.00%		53.00%
Tax Benefit on Exchange of Sylvamo Shares																	$ (56)
Two Thousand And Fifteen Financing Entities [Member]
Income Tax Disclosure [Abstract]
Timber Monetization Audit Settlement	0		(604)		0		0										(604)		$ 0		$ 0
Timber Monetization Audit Settlement	0		(604)		0		0										$ (604)		0		0
Sylvamo Corporation Investment
Income Tax Disclosure [Abstract]
Tax Benefit on Exchange of Sylvamo Shares	0		35		31		0												0		0
Tax Benefit on Exchange of Sylvamo Shares	$ 0		$ 35		$ 31		$ 0												$ 0		$ 0

[1] (a) Includes the following pre-tax charges (gains): 2022In millionsQ1Q2Q3Q4Debt extinguishment costs$— $— $93 $— EMEA Packaging goodwill impairment— — — 76 Foreign currency cumulative translation loss related to sale of equity method investment— — — 10 Timber monetization settlement interest— — 55 3 Litigation reserve adjustments— — (15)11 Environmental remediation reserve adjustment— 15 — 48 Sylvamo investment - fair value adjustment(46)(3)(16)— Other items— 6 — (4)Non-operating pension expense(49)(47)(48)(48)Total$(95)$(29)$69 $96 

[2] (d) Includes the following pre-tax charges (gains): 2021In millionsQ1Q2Q3Q4Debt extinguishment costs$18 $170 $35 $238 EMEA Packaging business optimization12 — — — Building a Better IP— — — 29 Legal reserve adjustment— — — (5)Environmental remediation reserve adjustment— 5 5 — Gain on sale of equity investment in Graphic Packaging(74)(130)— — EMEA Packaging impairment - Turkey2 (9)— — Sylvamo investment - fair value adjustment— — — 32 Real estate - office impairment— 21 — — Other items— 11 9 1 Non-operating pension expense(52)(51)(50)(47)Total$(94)$17 $(1)$248