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