XML 186 R167.htm IDEA: XBRL DOCUMENT v3.22.4
Dispositions (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
May 31, 2021
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Jun. 30, 2021
Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Carrying value of projects sold   $ 46,752   $ 44,214    
Stagecoach            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Equity method investment         $ 630 $ 667
Clean Energy Businesses | Subsidiaries            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Carrying value of projects sold     $ 192      
Gain (loss) on sale of projects   3        
Gain on sale, after tax   2        
Equity method investment   11        
Con Edison Transmission | Subsidiaries | Stagecoach            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Proceeds from sale $ 1,225          
Percentage of equity interest acquired (in percent) 50.00%     50.00%    
CECONY            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Carrying value of projects sold   $ 44,009   $ 41,611    
CECONY | Stagecoach | Purchased Power Costs | Equity Method Investee            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Percentage of equity interest acquired (in percent)       50.00%