Variable Interest Entities - HLVB Method of Accounting (Details) - Variable Interest Entity, Primary Beneficiary - Clean Energy Businesses - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
CED Nevada Virginia | Tax equity investor
Schedule of Equity Method Investments [Line Items]
Income (loss)	$ (49)	$ (158)
Net income (loss)	(37)	(119)
CED Nevada Virginia | Con Edison
Schedule of Equity Method Investments [Line Items]
Income (loss)	41	155
Net income (loss)	31	117
Tax Equity Projects | Tax equity investor
Schedule of Equity Method Investments [Line Items]
Income (loss)	(11)	6
Net income (loss)	(8)	4
Tax Equity Projects | Con Edison
Schedule of Equity Method Investments [Line Items]
Income (loss)	51	30
Net income (loss)	$ 38	$ 24