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Business Segments and Related Information - Schedule of Segment Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Segment Reporting Information [Line Items]    
Current assets $ 13,360 $ 15,133
Other assets 1,127 997
Consolidated total assets 77,902 77,168
Operating Segments    
Segment Reporting Information [Line Items]    
Consolidated total assets 61,015 56,900
Operating Segments | NGL Pipelines & Services    
Segment Reporting Information [Line Items]    
Consolidated total assets 24,999 21,900
Operating Segments | Crude Oil Pipelines & Services    
Segment Reporting Information [Line Items]    
Consolidated total assets 11,097 11,390
Operating Segments | Natural Gas Pipelines & Services    
Segment Reporting Information [Line Items]    
Consolidated total assets 13,194 12,260
Operating Segments | Petrochemical & Refined Products Services    
Segment Reporting Information [Line Items]    
Consolidated total assets 11,725 11,350
Segment Reporting, Reconciling Item, Corporate Nonsegment    
Segment Reporting Information [Line Items]    
Construction in progress 2,400 4,138
Current assets 13,360 15,133
Other assets $ 1,127 $ 997