Equity Method Investments (Narrative) (Details) lb in Millions, $ in Millions		12 Months Ended
	Jun. 17, 2015 lb	Dec. 31, 2022 USD ($) lb	Dec. 31, 2021 USD ($) lb	Mar. 15, 2022 USD ($)	Nov. 12, 2019 USD ($)	Oct. 28, 2019
Schedule of Equity Method Investments [Line Items]
Investments in joint ventures		$ 225
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity		201
Equity method investments		$ 1,142	$ 1,007
LACC, LLC
Schedule of Equity Method Investments [Line Items]
Reimbursement agreement term		6 years 6 months
Revenue, Remaining Performance Obligation, Amount		$ 54
Contract with Customer, Liability		$ 19	14
LACC, LLC | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Schedule of Equity Method Investments [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		25 years
Lotte Chemical Corporation
Schedule of Equity Method Investments [Line Items]
Revenue, Remaining Performance Obligation, Amount		$ 76
Contract with Customer, Liability		$ 24	$ 18
LACC, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)		50.00%		3.20%	34.80%	12.00%
Additional interest purchased				$ 89	$ 817
Investments in and Advances to Affiliates, Proportionate Share Of Production, Mass | lb		766	909
other equity method investments
Schedule of Equity Method Investments [Line Items]
Equity method investments		$ 67	$ 64
Affiliates
Schedule of Equity Method Investments [Line Items]
Plant capacity (in lbs) | lb	2,200