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INVESTMENTS AND RELATED-PARTY TRANSACTIONS (Details) - USD ($)
shares in Millions, $ in Millions
 1 Months Ended 12 Months Ended
Aug. 31, 2024
Jul. 31, 2023
Sep. 30, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Equity Method Investments            
Equity method investment amounts       $ 3,159 $ 3,224  
Deferred credits and other liabilities       16,466 15,975  
Dividends received as return on investment       822 708 $ 643
Cumulative undistributed earnings       764 613  
Excess of investments in equity investees over the underlying equity in net assets       421 424  
Excess of investments in equity investees over the underlying equity in net assets, which represents goodwill       316 371  
Summarized Results of Operations            
Revenues and other income       26,880 28,918 37,095
Costs and expenses       23,672 23,023 24,088
NET INCOME       3,078 4,696 13,304
Summarized Balance Sheet            
Current assets       9,070 8,375  
Current liabilities       9,521 9,148  
Long-term debt       24,978 18,536  
Other non-current liabilities       16,466 15,975  
Equity       34,159 30,250  
RELATED-PARTY TRANSACTIONS            
Sales       26,725 28,257 36,634
Purchases       560 722 948
Services       1,413 1,155 1,006
Advances and amounts due from related parties       3,526 3,195  
Amounts due to related parties       3,753 3,646  
Related Party            
RELATED-PARTY TRANSACTIONS            
Sales       244 256 337
Advances and amounts due from related parties       49 62 40
Amounts due to related parties       384 371 306
Equity Method Investment, Nonconsolidated Investee            
Equity Method Investments            
Deferred credits and other liabilities       2,504 2,396 1,289
Summarized Results of Operations            
Revenues and other income       5,184 4,724 6,342
Costs and expenses       3,527 3,753 4,514
NET INCOME       1,657 971 1,828
Summarized Balance Sheet            
Current assets       4,874 4,772 3,482
Non-current assets       18,151 18,715 15,282
Current liabilities       2,270 2,547 1,342
Long-term debt       9,296 9,673 9,512
Other non-current liabilities       2,504 2,396 1,289
Equity       $ 8,955 $ 8,870 $ 6,621
WES            
Equity Method Investments            
Equity method investment ownership percentage       46.00%    
Equity method investment amounts       $ 1,850    
Number of shares sold (in shares) 19.5          
Gain on sale $ 489          
RELATED-PARTY TRANSACTIONS            
Sales to related party (as a percent)       35.00% 37.00% 42.00%
Purchases from related party (as a percent)       5.00% 22.00% 24.00%
OxyChem Ingleside Facility            
Equity Method Investments            
Equity method investment ownership percentage       50.00%    
Equity method investment amounts       $ 503    
NET Power            
Equity Method Investments            
Equity method investment ownership percentage       41.60%    
Equity method investment amounts       $ 488    
DEL            
Equity Method Investments            
Equity method investment ownership percentage       24.50%    
Equity method investment amounts       $ 0    
Deferred credits and other liabilities       237    
Summarized Balance Sheet            
Other non-current liabilities       237    
Other            
Equity Method Investments            
Equity method investment amounts       $ 318    
Ingleside Ethylene LLC            
RELATED-PARTY TRANSACTIONS            
Purchases from related party (as a percent)       82.00% 69.00% 64.00%
WES | Disposal Group, Disposed of by Sale, Not Discontinued Operations            
Equity Method Investments            
Number of shares sold (in shares)   5.1 10.0 19.5    
Gain on sale   $ 51 $ 62 $ 489