(Business Special Items By Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Business net special items	$ 18	$ 481	$ 151
Industrial Packaging | Operating Segments [Member]
Segment Reporting Information [Line Items]
Business net special items	15	476	83
Global Cellulose Fibers | Operating Segments [Member]
Segment Reporting Information [Line Items]
Business net special items	$ 3	$ 5	$ 68