v3.26.1
ACQUISITIONS, DIVESTITURES AND OTHER TRANSACTIONS - Schedule of Discontinued Operations, Net of Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Costs and other deductions    
Income from discontinued operations, net of tax $ 3,123 $ 115
OxyChem | Discontinued Operations, Disposed of by Sale    
Disposal Group Including Discontinued Operation Revenue And Other Income [Abstract]    
Net Sales 26  
Interest, dividends and other income 0  
Gains on sales of assets and others, net 4,072  
Total revenues and other income 4,098  
Costs and other deductions    
Chemical cost of sales 23  
General and administrative expense 4  
Other operating and non-operating expense 28  
Depreciation, depletion and amortization 0  
Acquisition-related costs 0  
Other expense, net 0  
Total costs and other deductions 55  
Income before income taxes and other items 4,043  
Income from equity investments and other 1  
Income before income taxes 4,044  
Income tax expense (921)  
Income from discontinued operations, net of tax $ 3,123  
OxyChem | Discontinued Operations, Held-for-sale    
Disposal Group Including Discontinued Operation Revenue And Other Income [Abstract]    
Net Sales   1,099
Interest, dividends and other income   6
Gains on sales of assets and others, net   0
Total revenues and other income   1,105
Costs and other deductions    
Chemical cost of sales   762
General and administrative expense   26
Other operating and non-operating expense   66
Depreciation, depletion and amortization   113
Acquisition-related costs   0
Other expense, net   8
Total costs and other deductions   975
Income before income taxes and other items   130
Income from equity investments and other   25
Income before income taxes   155
Income tax expense   (40)
Income from discontinued operations, net of tax   $ 115