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Segment Disclosures Recon from Segment to Consolidated - Assets and Investments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Total assets $ 60,610   $ 60,610   $ 58,573
Current assets 3,123   3,123   3,244
Other Assets, Noncurrent 1,985   1,985   2,011
Operating Segments [Member] | Transmission, Power & Gulf [Member]          
Segment Reporting [Line Items]          
Equity-method investments 537   537   512
Total assets 29,057   29,057   26,515
Segment Reporting, Long-Lived Asset, Expenditure for Addition 1,556 $ 725 2,986 $ 1,027  
Operating Segments [Member] | Northeast G & P [Member]          
Segment Reporting [Line Items]          
Equity-method investments 3,183   3,183   3,236
Total assets 12,279   12,279   12,533
Segment Reporting, Long-Lived Asset, Expenditure for Addition 20 54 43 113  
Operating Segments [Member] | West [Member]          
Segment Reporting [Line Items]          
Equity-method investments 432   432   460
Total assets 12,163   12,163   12,398
Segment Reporting, Long-Lived Asset, Expenditure for Addition 42 238 108 795  
Operating Segments [Member] | Gas & NGL Marketing Services          
Segment Reporting [Line Items]          
Equity-method investments 289   289   292
Total assets 308   308   317
Segment Reporting, Long-Lived Asset, Expenditure for Addition 1 1 1 1  
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment          
Segment Reporting [Line Items]          
Equity-method investments 4,441   4,441   4,500
Total assets 53,807   53,807   $ 51,763
Segment Reporting, Long-Lived Asset, Expenditure for Addition $ 1,619 $ 1,018 $ 3,138 $ 1,936