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Variable Interest Entities - Additional Information (Details) - Clean Energy Businesses - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Jun. 30, 2021
Variable Interest Entity [Line Items]      
Equity method investment     $ 11
Loss from the project, pre-tax   $ 11  
Loss from the project, after-tax   $ 8  
Tax Equity Projects | Con Edison | Variable Interest Entity, Primary Beneficiary      
Variable Interest Entity [Line Items]      
Percentage of variable interests (less than) 100.00%    
CED Nevada Virginia | Con Edison | Variable Interest Entity, Primary Beneficiary      
Variable Interest Entity [Line Items]      
Percentage of variable interests (less than) 100.00%