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Revenues and Accounts Receivable - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Crude Oil    
Disaggregation of Revenue    
Revenue from contracts with customers $ 13,102 $ 7,946
Crude Oil | Sales    
Disaggregation of Revenue    
Revenue from contracts with customers 12,857 7,726
Crude Oil | Transportation    
Disaggregation of Revenue    
Revenue from contracts with customers 155 90
Crude Oil | Terminalling, Storage and Other    
Disaggregation of Revenue    
Revenue from contracts with customers 90 130
NGL    
Disaggregation of Revenue    
Revenue from contracts with customers 879 801
NGL | Sales    
Disaggregation of Revenue    
Revenue from contracts with customers 845 772
NGL | Transportation    
Disaggregation of Revenue    
Revenue from contracts with customers 9 7
NGL | Terminalling, Storage and Other    
Disaggregation of Revenue    
Revenue from contracts with customers $ 25 $ 22