(Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Earnings (loss) from continuing operations before income taxes and equity earnings			$ 382	$ 1,511	$ 999
Statutory U.S. income tax rate			21.00%	21.00%	21.00%
Tax expense (benefit) using statutory U.S. income tax rate			$ 80	$ 317	$ 210
State and local income taxes			2	44	15
Impact of rate differential on non-U.S. permanent differences and earnings			(10)	1	5
Foreign valuation allowance			0	45	0
Tax Benefit on Exchange of Sylvamo Shares			0	(56)	0
Adjustment to tax basis of assets			0	0	(14)
Non-deductible business expenses			7	2	1
Non-deductible impairments			0	16	0
Non-deductible compensation			7	13	11
Tax audits			(4)	6	9
Deferred income tax provision (benefit), net			(156)	(773)	(291)
Effective Income Tax Rate Reconciliation, FDII, Amount			(2)	(8)	(7)
Effective Income Tax Rate Reconciliation, GILTI, Amount			0	27	5
Foreign tax credits			(8)	(8)	(6)
General business and other tax credits			(38)	(43)	(39)
Tax expense (benefit) on equity earnings			(4)	(1)	0
Legal entity restructuring gain (loss)			4	0	0
Other, net			5	(3)	(2)
Income tax provision (benefit)			$ 59	$ (236)	$ 188
Effective income tax rate			15.00%	(16.00%)	19.00%
Tax Benefit on Exchange of Sylvamo Shares			$ 0	$ (56)	$ 0
Deferred income tax provision (benefit), net			(156)	(773)	(291)
Two Thousand And Fifteen Financing Entities [Member]
Income Tax Disclosure [Abstract]
Deferred income tax provision (benefit), net			0	(604)	0
Deferred income tax provision (benefit), net			$ 0	$ (604)	$ 0
Sylvamo Corporation Investment
Income Tax Disclosure [Abstract]
Tax Benefit on Exchange of Sylvamo Shares	$ 35	$ 31
Tax Benefit on Exchange of Sylvamo Shares	$ 35	$ 31