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Acquisitions and Dispositions - (Schedule Of Major Classes Of Assets And Liabilities Relating To The Disposal Groups Reported As Held For Sale) (Parenthetical) (Detail) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Aggregate outstanding principal $ 39,320 $ 40,206
Weighted-average coupon rate for debt outstanding 4.74% 5.69%
Enbridge | East Ohio    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Cash and Cash Equivalents   $ 4
Regulatory assets   75
Goodwill   1,500
Other deferred charges and other assets, including regulatory assets   781
Regulatory liabilities   54
Other deferred credits and liabilities including regulatory liabilities   711
Enbridge | PSNC    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Cash and Cash Equivalents   2
Regulatory assets   89
Goodwill   673
Other deferred charges and other assets, including regulatory assets   86
Regulatory liabilities   44
Other deferred credits and liabilities including regulatory liabilities   435
Enbridge | Questar Gas and Wexpro    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Cash and Cash Equivalents   26
Regulatory assets   297
Goodwill   768
Other deferred charges and other assets, including regulatory assets   39
Regulatory liabilities   55
Other deferred credits and liabilities including regulatory liabilities   502
Unsecured senior Notes 2.98% | Questar Gas and Wexpro    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Aggregate outstanding principal   $ 40
Interest Rate   2.98%
Unsecured Senior Notes 1.30% to 6.38%, due 2025 to 2052 | East Ohio    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Weighted-average coupon rate for debt outstanding   3.13%
Unsecured Senior Notes 1.30% to 6.38%, due 2025 to 2052 | East Ohio | Minimum    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Interest Rate   1.30%
Unsecured Senior Notes 1.30% to 6.38%, due 2025 to 2052 | East Ohio | Maximum    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Interest Rate   6.38%
Unsecured Senior Notes 3.10% to 7.45%, due 2026 to 2053 | PSNC    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Weighted-average coupon rate for debt outstanding   4.67%
Unsecured Senior Notes 3.10% to 7.45%, due 2026 to 2053 | PSNC | Minimum    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Interest Rate   3.10%
Unsecured Senior Notes 3.10% to 7.45%, due 2026 to 2053 | PSNC | Maximum    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Interest Rate   7.45%
Unsecured Senior Notes 2.21% to 7.20%, due 2024 to 2052 | Questar Gas and Wexpro    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Weighted-average coupon rate for debt outstanding   3.99%
Unsecured Senior Notes 2.21% to 7.20%, due 2024 to 2052 | Questar Gas and Wexpro | Minimum    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Interest Rate   2.21%
Unsecured Senior Notes 2.21% to 7.20%, due 2024 to 2052 | Questar Gas and Wexpro | Maximum    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Interest Rate   7.20%