Acquisitions, Dispositions and Plant Closures (Plant Closure Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Asset impairments		$ 31	$ 83	$ 0
Restructuring		20	23	4
Loss on disposition of assets, net		7	$ 2	$ 5
Europe [Member] | Engineered Materials [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairments	[1]	26
Restructuring	[1]	6
Accelerated depreciation expense		2
Plant Shutdown Costs		34
Restructuring and Related Cost, Expected Cost		$ 44

[1] Included in Other (charges) gains, net in the consolidated statements of operations (Note 16).