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Revenues and Accounts Receivable - Disaggregation of Revenue (Details) - Operating Segments - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Disaggregation of Revenue        
Revenue from contracts with customers $ 12,270 $ 14,082 $ 36,231 $ 44,431
Crude Oil        
Disaggregation of Revenue        
Revenue from contracts with customers 11,957 13,637 34,966 42,581
Crude Oil | Sales        
Disaggregation of Revenue        
Revenue from contracts with customers 11,525 13,362 33,843 41,796
Crude Oil | Transportation        
Disaggregation of Revenue        
Revenue from contracts with customers 333 185 839 515
Crude Oil | Terminalling, Storage and Other        
Disaggregation of Revenue        
Revenue from contracts with customers 99 90 284 270
NGL        
Disaggregation of Revenue        
Revenue from contracts with customers 313 445 1,265 1,850
NGL | Sales        
Disaggregation of Revenue        
Revenue from contracts with customers 283 417 1,168 1,761
NGL | Transportation        
Disaggregation of Revenue        
Revenue from contracts with customers 7 7 23 23
NGL | Terminalling, Storage and Other        
Disaggregation of Revenue        
Revenue from contracts with customers $ 23 $ 21 $ 74 $ 66