XML 103 R88.htm IDEA: XBRL DOCUMENT v3.25.3
Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: $ 818 $ 741
CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 790 712
Netting Adjustment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: (40) (49)
Netting Adjustment | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: (35) (48)
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 655 579
Level 1 | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 640 562
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 198 210
Level 2 | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 184 197
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 5 1
Level 3 | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 1 1
Commodity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 51 42
Derivative liabilities: 129 148
Commodity | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 44 36
Derivative liabilities: 115 128
Commodity | Netting Adjustment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: (40) (49)
Derivative liabilities: (34) (48)
Commodity | Netting Adjustment | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: (35) (48)
Derivative liabilities: (33) (47)
Commodity | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 22 9
Derivative liabilities: 3 5
Commodity | Level 1 | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 22 9
Derivative liabilities: 3 4
Commodity | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 64 81
Derivative liabilities: 143 175
Commodity | Level 2 | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 56 74
Derivative liabilities: 137 164
Commodity | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 5 1
Derivative liabilities: 17 16
Commodity | Level 3 | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 1 1
Derivative liabilities: 8 7
Mutual Funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 633 570
Mutual Funds | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 618 553
Mutual Funds | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 633 570
Mutual Funds | Level 1 | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 618 553
Cash Value of Life Insurance Policies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 134 129
Cash Value of Life Insurance Policies | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 128 123
Cash Value of Life Insurance Policies | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: 134 129
Cash Value of Life Insurance Policies | Level 2 | CECONY | Subsidiaries    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets: $ 128 $ 123