Summary of Significant Accounting Policies and Other Matters - Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2024 USD ($) project mi	Jun. 30, 2024 USD ($) project shares	Jun. 30, 2024 USD ($) project shares	Mar. 01, 2023 project
Schedule of Equity Method Investments [Line Items]
Antidilutive shares (in shares) | shares		0	0
Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses
Schedule of Equity Method Investments [Line Items]
Tax equity projects | project	3	3	3	2
Mountain Valley Pipeline LLC | CET Electric
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	6.70%	6.70%	6.70%
Mountain Valley Pipeline LLC | Con Edison Gas Pipeline and Storage, LLC
Schedule of Equity Method Investments [Line Items]
Number of miles in pipeline construction | mi	303
Aggregate project cost | $	$ 7,900	$ 7,900	$ 7,900
Equity method investments | $	$ 156	$ 156	156
Cash contributions for equity method investments | $			$ 530
Broken Bow II | Clean Energy Businesses | Electric Energy (MWh)
Schedule of Equity Method Investments [Line Items]
Deferred projects | project	1	1	1	1
Broken Bow II | Clean Energy Businesses | Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses
Schedule of Equity Method Investments [Line Items]
Number of projects | project				3