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	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate outstanding principal	$ 40,206	$ 37,522
Weighted-average coupon rate for debt outstanding	5.69%	4.73%
Enbridge | East Ohio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Cash Equivalents	$ 4	$ 6
Regulatory assets	75	90
Goodwill	1,500	1,500
Other deferred charges and other assets, including regulatory assets	781	751
Regulatory liabilities	54	43
Other deferred credits and liabilities including regulatory liabilities	711	749
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	95
Goodwill	673	673
Other deferred charges and other assets, including regulatory assets	86	93
Regulatory liabilities	44	11
Other deferred credits and liabilities including regulatory liabilities	435	436
Enbridge | PSNC | Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Cash Equivalents		1
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	28
Regulatory assets	297	273
Goodwill	720	983
Other deferred charges and other assets, including regulatory assets	39	22
Regulatory liabilities	55	144
Other deferred credits and liabilities including regulatory liabilities	502	$ 506
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%
Maturity period	2024-12
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%