Acquisitions, Dispositions and Plant Closures Plant Closures (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Asset impairments		$ 0	$ 2	$ 2	$ 31
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property		(11)	0	(6)	1
Plant Office Closures		(1)	$ (1)	(10)	(6)
Business Acquisition [Line Items]
Expected Payments to Acquire Businesses, Gross				1,150
Europe [Member] | Engineered Materials
Restructuring Cost and Reserve [Line Items]
Asset impairments					$ 26
Restructuring and Related Cost, Accelerated Depreciation				5
Plant Shutdown Costs				(4)
Restructuring and Related Cost, Expected Cost		$ 12		12
Plant Office Closures	[1]			$ (9)

[1] Included in Other (charges) gains, net in the unaudited interim consolidated statement of operations (Note 12).