Variable Interest Entities (Narrative) (Details) a in Thousands	1 Months Ended	3 Months Ended					12 Months Ended
	Oct. 31, 2007 USD ($) a	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2006 USD ($) a	Aug. 31, 2021 USD ($)	Dec. 31, 2007 USD ($)
Variable Interest Entity [Line Items]
Long-term debt		$ 4,816,000,000				$ 5,383,000,000	$ 4,816,000,000	$ 5,383,000,000
Long-term debt, fair value		5,200,000,000				7,100,000,000	5,200,000,000	7,100,000,000
Deferred Income Taxes		1,732,000,000				2,618,000,000	1,732,000,000	2,618,000,000
Two Thousand Seven Monetized Notes [Member]
Variable Interest Entity [Line Items]
Forestlands average sales | a	1,550
Amount of consideration received	$ 2,400,000,000						$ 2,400,000,000
Letters of credit downgrade period of replacement							30 days
Notes receivable, fair value disclosure		2,300,000,000				2,300,000,000	$ 2,300,000,000	2,300,000,000
Long-term debt, fair value		2,100,000,000				2,100,000,000	2,100,000,000	2,100,000,000
Letters of credit issued		2,400,000,000					2,400,000,000
Long-term debt												$ 2,100,000,000
Two Thousand And Fifteen Financing Entities [Member]
Variable Interest Entity [Line Items]
Forestlands average sales | a										5,600
Amount of consideration received										$ 4,800,000,000
Financing Receivable, before Allowance for Credit Loss											$ 4,800,000,000
Long-term debt											$ 4,200,000,000
equity in variable interest entities attributable to parent						630,000,000		630,000,000
Expected cash tax payment						$ 72,000,000
Tax Adjustments, Settlements, and Unusual Provisions							252,000,000
Income tax examination, penalties and interest Expense		3,000,000	$ 55,000,000	$ 0	$ 0		58,000,000
Income Taxes Paid							89,000,000
Interest Paid, Excluding Capitalized Interest, Operating Activities							28,000,000
Deferred Income Taxes		163,000,000					163,000,000
Income Tax Examination, Interest Accrued		30,000,000					30,000,000
Deferred Income Taxes and Tax Credits		0	$ 604,000,000	$ 0	$ 0		604,000,000	$ 0	$ 0
Two Thousand Seven Monetized Notes [Member]
Variable Interest Entity [Line Items]
Deferred tax liabilities, other		$ 485,000,000					$ 485,000,000