Goodwill and Intangible Assets, net (Schedule of Goodwill) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Goodwill [Line Items]
As of December 31, 2019	$ 1,074
Exchange rate changes	(18)
As of March 31, 2019	1,056	[1]
Goodwill, Impaired, Accumulated Impairment Loss	0
Engineered Materials
Goodwill [Line Items]
As of December 31, 2019	727
Exchange rate changes	(13)
As of March 31, 2019	714	[1]
Acetate Tow
Goodwill [Line Items]
As of December 31, 2019	148
Exchange rate changes	(1)
As of March 31, 2019	147	[1]
Acetyl Chain
Goodwill [Line Items]
As of December 31, 2019	199
Exchange rate changes	(4)
As of March 31, 2019	$ 195	[1]

[1] There were $0 million of accumulated impairment losses as of March 31, 2020.