Acquisitions and Dispositions - (Schedule Of Major Classes Of Assets And Liabilities Relating To The Disposal Groups Reported As Held For Sale) (Parenthetical) (Details) - Enbridge - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
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	83	90
Goodwill	1,500	1,500
Other deferred charges and other assets, including regulatory assets	725	751
Regulatory liabilities	54	43
Other deferred credits and liabilities including regulatory liabilities	725	749
PSNC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Regulatory assets	114	95
Goodwill	673	673
Other deferred charges and other assets, including regulatory assets	88	93
Regulatory liabilities	42	11
Other deferred credits and liabilities including regulatory liabilities	441	436
PSNC | Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Cash Equivalents	1	1
Questar Gas and Wexpro
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and Cash Equivalents	35	28
Regulatory assets	423	273
Goodwill	983	983
Other deferred charges and other assets, including regulatory assets	34	22
Regulatory liabilities	48	144
Other deferred credits and liabilities including regulatory liabilities	$ 510	$ 506