Segment Information (Schedule of Business Segments) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales		$ 1,460	$ 1,687
Other (charges) gains, net (Note 14)		(6)	4
Operating profit (loss)		194	320
Equity in net earnings (loss) of affiliates		57	50
Depreciation and amortization		85	83
Capital expenditures	[1]	86	54
Goodwill and intangible assets, net		1,358		$ 1,386
Total assets		9,545		9,476
Increase (decrease) in accrued capital expenditures		(33)	(25)
Acetate Tow
Segment Reporting Information [Line Items]
Net sales		129	166
Acetyl Chain
Segment Reporting Information [Line Items]
Net sales	[2]	768	858
Engineered Materials
Segment Reporting Information [Line Items]
Net sales		563	663
Operating Segments [Member] | Acetate Tow
Segment Reporting Information [Line Items]
Net sales		129	166
Other (charges) gains, net (Note 14)		(1)	0
Operating profit (loss)		27	40
Equity in net earnings (loss) of affiliates		0	0
Depreciation and amortization		8	10
Capital expenditures		10	8
Goodwill and intangible assets, net		152		153
Total assets		947		977
Operating Segments [Member] | Acetyl Chain
Segment Reporting Information [Line Items]
Net sales		799	889
Other (charges) gains, net (Note 14)		0	0
Operating profit (loss)		135	202
Equity in net earnings (loss) of affiliates		1	1
Depreciation and amortization		39	38
Capital expenditures		43	26
Goodwill and intangible assets, net		229		234
Total assets		3,457		3,489
Operating Segments [Member] | Engineered Materials
Segment Reporting Information [Line Items]
Net sales		563	663
Other (charges) gains, net (Note 14)		0	15
Operating profit (loss)		102	144
Equity in net earnings (loss) of affiliates		53	46
Depreciation and amortization		34	32
Capital expenditures		24	16
Goodwill and intangible assets, net		977		999
Total assets		4,112		4,125
Corporate, Non-Segment [Member] | Other
Segment Reporting Information [Line Items]
Net sales		0	0
Other (charges) gains, net (Note 14)		(5)	(11)
Operating profit (loss)		(70)	(66)
Equity in net earnings (loss) of affiliates		3	3
Depreciation and amortization		4	3
Capital expenditures		9	4
Goodwill and intangible assets, net		0		0
Total assets		1,029		885
Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	[3]	(31)	(31)
Other (charges) gains, net (Note 14)		0	0
Operating profit (loss)		0	0
Equity in net earnings (loss) of affiliates		0	0
Depreciation and amortization		0	0
Capital expenditures		0	0
Goodwill and intangible assets, net		0		0
Total assets		0		$ 0
Eliminations [Member] | Acetyl Chain
Segment Reporting Information [Line Items]
Net sales		$ 31	$ 31

[1] Includes a decrease in accrued capital expenditures of $33 million and $25 million for the three months ended March 31, 2020 and 2019, respectively.

[2] Excludes intersegment sales of $31 million and $31 million for the three months ended March 31, 2020 and 2019, respectively.

[3] Includes intersegment sales primarily related to the Acetyl Chain.