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Derivative Instruments and Hedging Activities - Realized and Unrealized Gains or Losses on Commodity Derivatives (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | $ 251 | $ 191
Total deferred gains/(losses) | 384 | 122
Net deferred gains/(losses) | 635 | 313
Pre-tax gain/(loss) recognized in income |  |
Total pre-tax gain/(loss) recognized in income | $ 168 | $ 78
Gas purchased for resale |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Operating costs | Operating costs
Pre-tax gain/(loss) recognized in income |  |
Total pre-tax gain/(loss) recognized in income | $ 5 | $ 18
Other operations and maintenance expense |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Operating costs | Operating costs
Pre-tax gain/(loss) recognized in income |  |
Total pre-tax gain/(loss) recognized in income | $ 4 | $ 5
Interest Expense (Income), Other, Net |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other interest | Other interest
Pre-tax gain/(loss) recognized in income |  |
Total pre-tax gain/(loss) recognized in income | $ 159 | $ 52
Non-utility |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | TOTAL OPERATING REVENUES | TOTAL OPERATING REVENUES
Pre-tax gain/(loss) recognized in income |  |
Total pre-tax gain/(loss) recognized in income | $ 0 | $ 3
Deferred Derivative Gains,Current |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | 168 | 134
Deferred Derivative Gains, Noncurrent |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | 83 | 57
Deferred Derivative Losses, Current |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | (43) | 49
Recoverable Energy Costs, Current |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | 408 | 3
Deferred Derivative Losses, Noncurrent |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | 19 | 70
CECONY |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | 230 | 175
Total deferred gains/(losses) | 347 | 109
Net deferred gains/(losses) | 577 | 284
Pre-tax gain/(loss) recognized in income |  |
Total pre-tax gain/(loss) recognized in income | $ 4 | $ 5
CECONY | Gas purchased for resale |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Operating costs | Operating costs
Pre-tax gain/(loss) recognized in income |  |
Total pre-tax gain/(loss) recognized in income | $ 0 | $ 0
CECONY | Other operations and maintenance expense |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Operating costs | Operating costs
Pre-tax gain/(loss) recognized in income |  |
Total pre-tax gain/(loss) recognized in income | $ 4 | $ 5
CECONY | Interest Expense (Income), Other, Net |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other interest | Other interest
Pre-tax gain/(loss) recognized in income |  |
Total pre-tax gain/(loss) recognized in income | $ 0 | $ 0
CECONY | Non-utility |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | TOTAL OPERATING REVENUES | TOTAL OPERATING REVENUES
Pre-tax gain/(loss) recognized in income |  |
Total pre-tax gain/(loss) recognized in income | $ 0 | $ 0
CECONY | Deferred Derivative Gains,Current |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | 155 | 124
CECONY | Deferred Derivative Gains, Noncurrent |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | 75 | 51
CECONY | Deferred Derivative Losses, Current |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | (44) | 43
CECONY | Recoverable Energy Costs, Current |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | 372 | 0
CECONY | Deferred Derivative Losses, Noncurrent |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |
Total deferred gains/(losses) | $ 19 | $ 66

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