Segment Information (Schedule of Business Segments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales		$ 8,537	$ 5,655	$ 6,297
Other (charges) gains, net		3	(39)	(203)
Operating profit (loss)		1,946	664	834
Equity in net earnings (loss) of affiliates		146	134	182
Depreciation and amortization		371	350	352
Capital expenditures	[1]	490	348	390
Goodwill and intangible assets, net		2,147	1,485
Total assets		11,975	10,909
Increase (decrease) in accrued capital expenditures		23	(16)	20
Gain (loss) on sale of investments in affiliates		0	1,408	0
Acetate Tow [Member]
Segment Reporting Information [Line Items]
Net sales		514	519	636
Acetyl Chain [Member]
Segment Reporting Information [Line Items]
Net sales	[2]	5,305	3,055	3,275
Engineered Materials [Member]
Segment Reporting Information [Line Items]
Net sales		2,718	2,081	2,386
Operating Segments [Member] | Acetate Tow [Member]
Segment Reporting Information [Line Items]
Net sales		514	519	636
Other (charges) gains, net		0	(1)	(88)
Operating profit (loss)		56	118	52
Equity in net earnings (loss) of affiliates		0	0	0
Depreciation and amortization		39	36	45
Capital expenditures		42	37	43
Goodwill and intangible assets, net		154	154
Total assets		1,098	975
Gain (loss) on sale of investments in affiliates			0
Operating Segments [Member] | Acetyl Chain [Member]
Segment Reporting Information [Line Items]
Net sales	[3]	5,430	3,147	3,392
Other (charges) gains, net		1	7	(3)
Operating profit (loss)		1,819	563	678
Equity in net earnings (loss) of affiliates		7	5	4
Depreciation and amortization		171	163	161
Capital expenditures		269	171	208
Goodwill and intangible assets, net		279	301
Total assets		4,428	3,930
Gain (loss) on sale of investments in affiliates			0
Operating Segments [Member] | Engineered Materials [Member]
Segment Reporting Information [Line Items]
Net sales		2,718	2,081	2,386
Other (charges) gains, net		6	(36)	5
Operating profit (loss)		411	235	446
Equity in net earnings (loss) of affiliates		126	115	168
Depreciation and amortization		144	134	131
Capital expenditures		154	106	104
Goodwill and intangible assets, net		1,714	1,030
Total assets		5,363	3,990
Gain (loss) on sale of investments in affiliates			1,408
Corporate, Non-Segment [Member] | Other Activities [Member]
Segment Reporting Information [Line Items]
Net sales		0	0	0
Other (charges) gains, net		(4)	(9)	(117)
Operating profit (loss)		(340)	(252)	(342)
Equity in net earnings (loss) of affiliates		13	14	10
Depreciation and amortization		17	17	15
Capital expenditures		25	34	35
Goodwill and intangible assets, net		0	0
Total assets		1,086	2,014
Gain (loss) on sale of investments in affiliates			0
Intersegment [Member]
Segment Reporting Information [Line Items]
Net sales		(125)	(92)	(117)
Other (charges) gains, net		0	0	0
Operating profit (loss)		0	0	0
Equity in net earnings (loss) of affiliates		0	0	0
Depreciation and amortization		0	0	0
Capital expenditures		0	0	0
Goodwill and intangible assets, net		0	0
Total assets		0	0
Gain (loss) on sale of investments in affiliates			0
Intersegment [Member] | Acetyl Chain [Member]
Segment Reporting Information [Line Items]
Net sales		$ 125	$ 92	$ 117

[1] Includes an increase in accrued capital expenditures of $23 million, a decrease in accrued capital expenditures of $16 million and an increase in accrued capital expenditures of $20 million for the years ended December 31, 2021, 2020 and 2019, respectively.

[2] Excludes intersegment sales of $125 million, $92 million and $117 million for the years ended December 31, 2021, 2020 and 2019, respectively.

[3] Includes intersegment sales of $125 million, $92 million and $117 million for the years ended December 31, 2021, 2020 and 2019, respectively.