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Acquisitions and Divestitures - Acquisitions (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 29, 2020
Jun. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]        
Payments to acquire businesses     $ 310 $ 50
Crude Oil Terminal        
Business Acquisition [Line Items]        
Cash consideration   $ 44    
Felix Midstream LLC        
Business Acquisition [Line Items]        
Payments to acquire businesses $ 300      
FM Gathering LLC        
Business Acquisition [Line Items]        
Property and equipment acquired     115  
Intangible assets acquired     $ 187  
FM Gathering LLC | Minimum | Level 3 | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow        
Business Acquisition [Line Items]        
Intangible assets, estimate of risk, theoretical market participant     18.00%  
FM Gathering LLC | Maximum | Level 3 | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow        
Business Acquisition [Line Items]        
Intangible assets, estimate of risk, theoretical market participant     19.00%