Acquisitions, Dispositions and Plant Closures Plant Closures (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Asset impairments		$ 1	$ 25	$ 2	$ 29
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property		0	1	5	1
Plant Office Closures		0	$ (6)	(9)	(5)
Business Acquisition [Line Items]
Expected Payments to Acquire Businesses, Gross				1,150
Europe [Member] | Engineered Materials
Restructuring Cost and Reserve [Line Items]
Asset impairments					$ 25
Restructuring and Related Cost, Accelerated Depreciation				3
Plant Shutdown Costs				(6)
Restructuring and Related Cost, Expected Cost		$ 16		16
Plant Office Closures	[1]			$ (9)

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