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Short-Term Borrowing (Details)
1 Months Ended
Aug. 31, 2022
USD ($)
Jun. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Short-term Debt [Line Items]          
Commercial paper, outstanding       $ 1,941,000,000 $ 1,488,000,000
Loans outstanding under the credit agreement       $ 0 $ 0
Debt instrument term   364 days      
Ratio of consolidated debt to consolidated total capital   0.65      
Percentage of liens of companies consolidated asset   5.00% 5.00%    
Maximum aggregate limit of failure to pay debt or derivative obligations   $ 150,000,000 $ 150,000,000    
Face amount of debt   400,000,000      
Proceeds from short-term debt   400,000,000      
Incremental term loan, maximum aggregate amount available   $ 200,000,000      
March 2022 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement | Revolving Credit Facility | Subsidiaries          
Short-term Debt [Line Items]          
Debt instrument term     364 days    
Maximum borrowing capacity     $ 750,000,000    
Ratio of consolidated debt to consolidated total capital     0.65    
Commercial Paper          
Short-term Debt [Line Items]          
Weighted average interest rate       3.40% 0.30%
CECONY | Subsidiaries          
Short-term Debt [Line Items]          
Commercial paper, outstanding       $ 1,789,000,000 $ 1,361,000,000
CECONY | Commercial Paper | Subsidiaries          
Short-term Debt [Line Items]          
Weighted average interest rate       3.40% 0.30%
Clean Energy Businesses          
Short-term Debt [Line Items]          
Debt instrument term 364 days        
Proceeds from short-term debt $ 150,000,000