Goodwill and Intangible Assets, Net (Schedule of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018
Goodwill
Goodwill, beginning balance	$ 1,057		$ 1,003
Acquisitions	29		84
Exchange rate changes	(12)		(30)
Goodwill, ending balance	1,074	[1]	1,057
Accumulated impairment losses	0
Engineered Materials [Member]
Goodwill
Goodwill, beginning balance	707		643
Acquisitions	29	[2]	84	[3]
Exchange rate changes	(9)		(20)
Goodwill, ending balance	727	[1]	707
Acetate Tow [Member]
Goodwill
Goodwill, beginning balance	148		149
Acquisitions	0		0
Exchange rate changes	0		(1)
Goodwill, ending balance	148	[1]	148
Acetyl Chain [Member]
Goodwill
Goodwill, beginning balance	202		211
Acquisitions	0		0
Exchange rate changes	(3)		(9)
Goodwill, ending balance	$ 199	[1]	$ 202

[1] There were $0 million of accumulated impairment losses as of December 31, 2019.

[2] Represents goodwill related to the acquisition of Next Polymers Ltd. ("Next Polymers").

[3] Represents goodwill related to the acquisition of Omni Plastics, L.L.C. ("Omni Plastics").