Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Revenues - Key products (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Revenues - Key products (Details) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of revenue [Line Items]
Total	$ 7,658	$ 8,678	$ 15,335	$ 16,982
Olefins and co-products
Disaggregation of revenue [Line Items]
Total	933	1,317	1,999	2,562
Polyethylene
Disaggregation of revenue [Line Items]
Total	1,882	1,942	3,660	3,840
Polypropylene
Disaggregation of revenue [Line Items]
Total	1,565	1,577	3,103	3,075
Propylene oxide and derivatives
Disaggregation of revenue [Line Items]
Total	556	630	1,144	1,232
Oxyfuels and related products
Disaggregation of revenue [Line Items]
Total	1,151	1,431	2,282	2,541
Intermediate chemicals
Disaggregation of revenue [Line Items]
Total	511	667	1,052	1,456
Compounding and solutions
Disaggregation of revenue [Line Items]
Total	913	943	1,817	1,903
Other
Disaggregation of revenue [Line Items]
Total	$ 147	$ 171	$ 278	$ 373