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SUPPLEMENTAL ACCOUNT BALANCES - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Disaggregation of revenue    
Oil, natural gas and NGL sales $ 429 $ 715
Oil    
Disaggregation of revenue    
Oil, natural gas and NGL sales 348 390
Revenue not from contract with customer 20 0
Natural gas    
Disaggregation of revenue    
Oil, natural gas and NGL sales 32 263
Revenue not from contract with customer 48 184
NGLs    
Disaggregation of revenue    
Oil, natural gas and NGL sales 49 62
Revenue not from contract with customer 6 3
Revenue from marketing of purchased commodities    
Disaggregation of revenue    
Revenue not from contract with customer $ 74 $ 187