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Intangible Assets and Goodwill - Schedule of Goodwill (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2025
Goodwill [Roll Forward]    
Balance at beginning of period $ 5,608  
Goodwill related to acquisition 104  
Balance at end of period 5,712  
Goodwill 5,712 $ 5,712
NGL Pipelines & Services    
Goodwill [Roll Forward]    
Balance at beginning of period 2,811  
Goodwill related to acquisition 29  
Balance at end of period 2,840  
Goodwill 2,840 2,840
Goodwill, impaired, accumulated impairment loss   0
Crude Oil Pipelines & Services    
Goodwill [Roll Forward]    
Balance at beginning of period 1,841  
Goodwill related to acquisition 0  
Balance at end of period 1,841  
Goodwill 1,841 1,841
Goodwill, impaired, accumulated impairment loss   0
Natural Gas Pipelines & Services    
Goodwill [Roll Forward]    
Balance at beginning of period 0  
Goodwill related to acquisition 75  
Balance at end of period 75  
Goodwill 75 75
Goodwill, impaired, accumulated impairment loss   296
Petrochemical & Refined Products Services    
Goodwill [Roll Forward]    
Balance at beginning of period 956  
Goodwill related to acquisition 0  
Balance at end of period 956  
Goodwill $ 956 956
Goodwill, impaired, accumulated impairment loss   $ 1