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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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, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of revenue [Line Items]
Total	$ 9,177	$ 7,658	$ 16,374	$ 15,335
Olefins and co-products
Disaggregation of revenue [Line Items]
Total	1,392	933	2,578	1,999
Polyethylene
Disaggregation of revenue [Line Items]
Total	2,245	1,882	3,926	3,660
Polypropylene
Disaggregation of revenue [Line Items]
Total	1,683	1,565	3,027	3,103
Propylene oxide and derivatives
Disaggregation of revenue [Line Items]
Total	647	556	1,165	1,144
Oxyfuels and related products
Disaggregation of revenue [Line Items]
Total	1,417	1,151	2,551	2,282
Intermediate chemicals
Disaggregation of revenue [Line Items]
Total	619	511	967	1,052
Compounding and solutions
Disaggregation of revenue [Line Items]
Total	1,006	913	1,879	1,817
Other
Disaggregation of revenue [Line Items]
Total	$ 168	$ 147	$ 281	$ 278