Variable Interest Entities (Narrative) (Details) a in Thousands, $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 31, 2007 USD ($) a	Dec. 31, 2021 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2006 USD ($) a	Aug. 31, 2021 USD ($)	Dec. 31, 2007 USD ($)
Variable Interest Entity [Line Items]
Long-term debt			$ 5,368	$ 5,455
Long-term debt, fair value			5,200	5,500
Deferred Income Taxes			1,072	1,552
Deferred Income Taxes and Tax Credits			0	0	$ 604
Two Thousand Seven Monetized Notes [Member]
Variable Interest Entity [Line Items]
Forestlands average sales | a	1,550
Amount of consideration received	$ 2,400		$ 2,400
Letters of credit downgrade period of replacement			30 days
Notes receivable, fair value disclosure			$ 2,300	2,300
Long-term debt, fair value			2,100	2,100
Letters of credit issued			2,400
Long-term debt								$ 2,100
Two Thousand And Fifteen Financing Entities [Member]
Variable Interest Entity [Line Items]
Forestlands average sales | a						5,600
Amount of consideration received						$ 4,800
Financing Receivable, before Allowance for Credit Loss							$ 4,800
Long-term debt							$ 4,200
equity in variable interest entities attributable to parent		$ 630
Expected cash tax payment		$ 72
Tax Adjustments, Settlements, and Unusual Provisions				252
Income tax examination, penalties and interest Expense					58
Deferred Income Taxes				163
Income Tax Examination, Interest Accrued				$ 30
Deferred Income Taxes and Tax Credits					$ 604
Two Thousand Seven Monetized Notes [Member]
Variable Interest Entity [Line Items]
Deferred tax liabilities, other			$ 486