Other (Charges) Gains, Net (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Other plant/office closures	$ 53	$ 0
Employee termination benefits	2	$ 5
Acetyl Intermediates [Member]
Restructuring Cost and Reserve [Line Items]
Other plant/office closures	53
Acetyl Intermediates [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Other plant/office closures	27
Acetyl Intermediates [Member] | Non-income tax receivable adjustment [Member]
Restructuring Cost and Reserve [Line Items]
Other plant/office closures	$ 18