Other (Charges) Gains, Net (Schedule of Other (Charges) Gains, Net) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 0	$ (2)
Other plant/office closures	0	(53)
Other (charges) gains, net	$ 0	(55)
Acetyl Intermediates [Member]
Restructuring Cost and Reserve [Line Items]
Other plant/office closures		(53)
Contract Termination [Member] | Acetyl Intermediates [Member]
Restructuring Cost and Reserve [Line Items]
Other plant/office closures		(27)
Non-income tax receivable adjustment [Member] | Acetyl Intermediates [Member]
Restructuring Cost and Reserve [Line Items]
Other plant/office closures		$ (18)