Acquisitions and Dispositions - (Schedule of Capital Expenditures and Significant Noncash Items Reported As Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Significant noncash items
Depreciation, depletion and amortization	$ 663	$ 630	$ 1,884	$ 1,832
Accrued capital expenditures			884	745
East Ohio | Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capital expenditures			355	299
Significant noncash items
Depreciation, depletion and amortization			109	99
Accrued capital expenditures			53	42
PSNC | Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capital expenditures			153	113
Significant noncash items
Depreciation, depletion and amortization			67	65
Accrued capital expenditures			22	14
Questar Gas and Wexpro | Enbridge
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capital expenditures			290	324
Significant noncash items
Depreciation, depletion and amortization			130	121
Accrued capital expenditures			33	49
Other Sales | Tredegar Solar Fund I, LLC
Significant noncash items
Depreciation, depletion and amortization			$ 2	$ 3