Goodwill and Intangible Assets, Net (Schedule of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Goodwill
Acquisitions (Note 4)	$ 128		$ 106
Exchange rate changes	79		(15)
Accumulated impairment losses	0
Net book value	1,003	[1]	796	$ 705
Advanced Engineered Materials [Member]
Goodwill
Acquisitions (Note 4)	128		106
Exchange rate changes	42		(3)
Net book value	555	[1]	385	282
Consumer Specialties [Member]
Goodwill
Acquisitions (Note 4)	0		0
Exchange rate changes	12		(5)
Net book value	237	[1]	225	230
Industrial Specialties [Member]
Goodwill
Acquisitions (Note 4)	0		0
Exchange rate changes	2		(1)
Net book value	40	[1]	38	39
Acetyl Intermediates [Member]
Goodwill
Acquisitions (Note 4)	0		0
Exchange rate changes	23		(6)
Net book value	$ 171	[1]	$ 148	$ 154

[1] There were $0 million of accumulated impairment losses as of December 31, 2017.