Acquisitions, Dispositions and Plant Closures (Plant Closure Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Asset impairments		$ 83		$ 0	$ 0
Restructuring		23		4	3
Loss on disposition of assets, net		2		5	$ 5
Ocotlán, Mexico
Restructuring Cost and Reserve [Line Items]
Asset impairments	[1]	83		0
Restructuring	[1]	4		2
Accelerated depreciation expense		9		15
Loss on disposition of assets, net		1		1
Other		7	[2]	1
Plant Shutdown Costs		104		$ 19
Restructuring and Related Cost, Expected Cost		$ 12

[1] Included in Other (charges) gains, net in the consolidated statements of operations (Note 18).

[2] Primarily related to inventory write-offs.