Recent Accounting Developments Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019
Goodwill, Impairment Loss		$ 60
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Net of Tax		529
Global Cellulose Fibers
Goodwill, Impairment Loss	$ 52	$ 52	[1]

[1] Reflects the impairment of the Global Cellulose Fibers reporting unit.