Restructuring Charges and Other Items (Restructuring and Related Costs Tables Footnotes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Corporate Segment
Restructuring Cost and Reserve [Line Items]
Severance costs	$ 11
Printing Papers
Restructuring Cost and Reserve [Line Items]
Severance costs	6
Global Cellulose Fibers
Restructuring Cost and Reserve [Line Items]
Severance costs	4
EMEA packaging restructuring
Restructuring Cost and Reserve [Line Items]
Severance costs	14	$ 33
Restructuring and related cost, accelerated depreciation		6
Restructuring and related costs, accelerated amortization and other noncash costs		2
Restructuring and other related charges, other	$ 1	$ 6