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Intangible Assets and Goodwill - Schedule of Customer Relationship Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross Value $ 6,709 $ 6,339
Accumulated Amortization (2,550) (2,334)
Carrying Value 4,159 $ 4,005
Customer relationship intangibles    
Finite-Lived Intangible Assets [Line Items]    
Carrying Value $ 2,400  
EFS Midstream (acquired 2015) | Customer relationship intangibles    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Amortization Period 16 years 4 months 24 days  
Gross Value $ 1,410  
Accumulated Amortization (461)  
Carrying Value $ 949  
State Line and Fairplay (acquired 2010) | Customer relationship intangibles    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Amortization Period 21 years 2 months 12 days  
Gross Value $ 895  
Accumulated Amortization (356)  
Carrying Value $ 539  
San Juan Gathering (acquired 2004) | Customer relationship intangibles    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Amortization Period 13 years 9 months 18 days  
Gross Value $ 331  
Accumulated Amortization (280)  
Carrying Value $ 51  
Oiltanking (acquired 2014) | Customer relationship intangibles    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Amortization Period 18 years  
Gross Value $ 1,193  
Accumulated Amortization (386)  
Carrying Value $ 807