Variable Interest Entities (Narrative) (Details) a in Thousands, $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2007 USD ($) a	Dec. 31, 2021 USD ($)	Dec. 31, 2006 USD ($) a	Dec. 31, 2020 USD ($)	Dec. 31, 2007 USD ($)
Variable Interest Entity [Line Items]
Long-term debt		$ 5,383		$ 8,042
Long-term debt, fair value		7,100		10,500
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
Deferred tax liabilities, other		$ 487
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
Deferred tax liabilities, other		813
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