XML 120 R97.htm IDEA: XBRL DOCUMENT v3.23.1
Fair Value Measurements - Reconciliation of Assets and Liabilities Measured at Level 3 Fair Value (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 15 $ (11)
Included in earnings (2) 24
Included in regulatory assets and liabilities 8 1
Settlements 4 0
Decrease due to the sale of the Clean Energy Businesses (29) 0
Transfer out of level 3 (7) 0
Ending balance (11) 14
CECONY | Subsidiaries    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (6) (7)
Included in earnings (1) (1)
Included in regulatory assets and liabilities 7 0
Settlements 2 2
Decrease due to the sale of the Clean Energy Businesses 0 0
Transfer out of level 3 (7) 0
Ending balance $ (5) $ (6)