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Acquisitions, Dispositions and Plant Closures Plant Closures - Narrative (Details) € in Millions, $ in Millions						1 Months Ended	9 Months Ended
	Sep. 16, 2022 USD ($)	Apr. 01, 2022 USD ($) annualInstallment	Apr. 01, 2022 EUR (€) annualInstallment	Mar. 18, 2022 USD ($)	Feb. 17, 2022 USD ($) employees patent facility	Dec. 31, 2021 USD ($)	Sep. 30, 2022 USD ($)
MEXICO \| Engineered Materials
Business Acquisition [Line Items]
Restructuring and related cost, expected cost							$ 13
Korea Engineering Plastics Co., Ltd.
Business Acquisition [Line Items]
Payments to equity method investment		$ 5	€ 24
Number of equal annual investments restructuring payment \| annualInstallment		5	5
Equity method investment, increase		$ 134
Celanese Corporation \| Korea Engineering Plastics Co., Ltd.
Business Acquisition [Line Items]
Equity method investment, ownership percentage		50.00%	50.00%
Mitsubishi Gas Chemical Company \| Korea Engineering Plastics Co., Ltd.
Business Acquisition [Line Items]
Equity method investment, ownership percentage		50.00%	50.00%
364 Day Senior Unsecured Bridge Term Loan \| Bridge Facility
Business Acquisition [Line Items]
Debt instrument, term					364 days
Bridge facility, maximum borrowing capacity					$ 11,000
Bridge facility, current borrowing capacity							0
Bridge Facility, commitment fee amount							$ 66
364 Day Delayed-Draw Term Loan \| Term Loan Facility
Business Acquisition [Line Items]
Debt instrument, term				364 days
Debt instrument, face amount				$ 500
364 Day Delayed-Draw Term Loan \| Term Loan Facility \| Minimum \| Term SOFR
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate				1.00%
364 Day Delayed-Draw Term Loan \| Term Loan Facility \| Minimum \| Base Rate
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate				0.00%
364 Day Delayed-Draw Term Loan \| Term Loan Facility \| Maximum \| Term SOFR
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate				2.00%
364 Day Delayed-Draw Term Loan \| Term Loan Facility \| Maximum \| Base Rate
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate				1.00%
5 Year Delayed-Draw Term Loan \| Term Loan Facility
Business Acquisition [Line Items]
Debt instrument, term				5 years
Debt instrument, face amount				$ 1,000
5 Year Delayed-Draw Term Loan \| Term Loan Facility \| Minimum \| Term SOFR
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate				1.125%
5 Year Delayed-Draw Term Loan \| Term Loan Facility \| Minimum \| Base Rate
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate				0.125%
5 Year Delayed-Draw Term Loan \| Term Loan Facility \| Maximum \| Term SOFR
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate				2.125%
5 Year Delayed-Draw Term Loan \| Term Loan Facility \| Maximum \| Base Rate
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate				1.125%
3 Year Delayed-Draw Term Loan \| Term Loan Facility
Business Acquisition [Line Items]
Debt instrument, term	3 years
Debt instrument, face amount	$ 750
3 Year Delayed-Draw Term Loan \| Term Loan Facility \| Minimum \| Term SOFR
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate	1.125%
3 Year Delayed-Draw Term Loan \| Term Loan Facility \| Minimum \| Base Rate
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate	0.125%
3 Year Delayed-Draw Term Loan \| Term Loan Facility \| Maximum \| Term SOFR
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate	2.125%
3 Year Delayed-Draw Term Loan \| Term Loan Facility \| Maximum \| Base Rate
Business Acquisition [Line Items]
Debt instrument, basis spread on variable rate	1.125%
Santoprene
Business Acquisition [Line Items]
Payments to acquire businesses, gross						$ 1,150
Mobility & Materials
Business Acquisition [Line Items]
Expected payments to acquire businesses, gross					$ 11,000
Number of facilities \| facility					29
Number of patents \| patent					850
Entity number of employees \| employees					5,000