ACQUISITIONS, DIVESTITURES AND OTHER TRANSACTIONS - Schedule of Reconciliation of Major Classes of Assets and Liabilities Classified as Held For Sale (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 41	$ 7
Total current assets held for sale	1,176	1,140
Total non-current assets held for sale	5,344	4,430
Total current liabilities held for sale	778	663
Total non-current liabilities held for sale	418	333
Held-for-sale | OxyChem
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	41	7
Trade receivables, net	640	687
Inventories	383	339
Other current assets	112	107
Total current assets held for sale	1,176	1,140
Investments in unconsolidated entities	475	513
Property, plant and equipment, net	4,442	3,515
Operating lease assets	207	182
Other long-term assets	220	220
Total non-current assets held for sale	5,344	4,430
Total non-current assets held for sale	6,520	5,570
Current maturities of long-term debt	6	0
Accounts payable	410	281
Accrued liabilities	362	382
Total current liabilities held for sale	778	663
Long-term debt, net	41	(1)
Asset retirement obligations	126	119
Other deferred credits and liabilities	251	215
Total non-current liabilities held for sale	418	333
Total liabilities held for sale	$ 1,196	$ 996