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Derivative Instruments and Hedging Activities - Realized and Unrealized Gains (Losses) on Commodity Derivatives (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | $ (78) | $ (52) | $ (37) | $ (327)
Total deferred gains (losses) | (1) | 55 | (18) | (385)
Net deferred gains (losses) | (79) | 3 | (55) | (712)
Pre-tax gains (losses) recognized in income |  |  |  |
Total pre-tax gains (losses) recognized in income |  |  | 1 | 26
Gas purchased for resale |  |  |  |
Pre-tax gains (losses) recognized in income |  |  |  |
Total pre-tax gains (losses) recognized in income |  |  | 0 | 4
Non-utility revenue |  |  |  |
Pre-tax gains (losses) recognized in income |  |  |  |
Total pre-tax gains (losses) recognized in income |  |  | 0 | 17
Other operations and maintenance expense |  |  |  |
Pre-tax gains (losses) recognized in income |  |  |  |
Total pre-tax gains (losses) recognized in income |  |  | 1 | 0
Other interest expense |  |  |  |
Pre-tax gains (losses) recognized in income |  |  |  |
Total pre-tax gains (losses) recognized in income |  |  | 0 | 5
Regulatory Liabilities, Current |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | (57) | (61) | (14) | (210)
Regulatory Liabilities, Noncurrent |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | (21) | 9 | (23) | (117)
Regulatory Assets Current |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | 55 | 40 | 122 | 25
Recoverable Energy Costs, Current |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | (74) | (84) | (188) | (376)
Regulatory Assets Non Current |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | 18 | 99 | 48 | (34)
CECONY | Subsidiaries |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | (78) | (49) | (40) | (298)
Total deferred gains (losses) | 3 | 52 | (12) | (364)
Net deferred gains (losses) | (75) | 3 | (52) | (662)
Pre-tax gains (losses) recognized in income |  |  |  |
Total pre-tax gains (losses) recognized in income |  |  | 1 | 0
CECONY | Gas purchased for resale | Subsidiaries |  |  |  |
Pre-tax gains (losses) recognized in income |  |  |  |
Total pre-tax gains (losses) recognized in income |  |  | 0 | 0
CECONY | Non-utility revenue | Subsidiaries |  |  |  |
Pre-tax gains (losses) recognized in income |  |  |  |
Total pre-tax gains (losses) recognized in income |  |  | 0 | 0
CECONY | Other operations and maintenance expense | Subsidiaries |  |  |  |
Pre-tax gains (losses) recognized in income |  |  |  |
Total pre-tax gains (losses) recognized in income |  |  | 1 | 0
CECONY | Other interest expense | Subsidiaries |  |  |  |
Pre-tax gains (losses) recognized in income |  |  |  |
Total pre-tax gains (losses) recognized in income |  |  | 0 | 0
CECONY | Regulatory Liabilities, Current | Subsidiaries |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | (55) | (57) | (15) | (194)
CECONY | Regulatory Liabilities, Noncurrent | Subsidiaries |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | (23) | 8 | (25) | (104)
CECONY | Regulatory Assets Current | Subsidiaries |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | 54 | 37 | 117 | 25
CECONY | Recoverable Energy Costs, Current | Subsidiaries |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | (68) | (81) | (172) | (355)
CECONY | Regulatory Assets Non Current | Subsidiaries |  |  |  |
Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains (losses) | $ 17 | $ 96 | $ 43 | $ (34)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A + Details
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