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Derivative Instruments and Hedging Activities - Realized and Unrealized Gains (Losses) on Commodity Derivatives (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | $ (22) | $ 54 | $ (349) | $ 470
Total deferred gains/(losses) | (110) | 258 | (495) | 426
Net deferred gains/(losses) | (132) | 312 | (844) | 896
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 1 | 45 | 27 | 140
Gas purchased for resale |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | (2) | 4 | 1
Non-utility |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | (1) | 17 | (23)
Other operations and maintenance expense |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 1 | (1) | 1 | 4
Other interest expense |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | 49 | 5 | 158
Regulatory Liabilities, Current |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (11) | 31 | (221) | 379
Regulatory Liabilities, Noncurrent |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (11) | 23 | (128) | 91
Regulatory Assets Current |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | 22 | 41 | 47 | 50
Recoverable Energy Costs, Current |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (98) | 168 | (474) | 357
Regulatory Assets Non Current |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (34) | 49 | (68) | 19
CECONY | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (18) | 47 | (316) | 429
Total deferred gains/(losses) | (103) | 234 | (467) | 387
Net deferred gains/(losses) | (121) | 281 | (783) | 816
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 1 | (1) | 1 | 4
CECONY | Gas purchased for resale | Subsidiaries |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | 0 | 0 | 0
CECONY | Non-utility | Subsidiaries |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | 0 | 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 | (1) | 1 | 4
CECONY | Other interest expense | Subsidiaries |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | 0 | 0 | 0
CECONY | Regulatory Liabilities, Current | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (9) | 30 | (203) | 350
CECONY | Regulatory Liabilities, Noncurrent | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (9) | 17 | (113) | 79
CECONY | Regulatory Assets Current | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | 20 | 37 | 45 | 45
CECONY | Recoverable Energy Costs, Current | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (94) | 152 | (449) | 324
CECONY | Regulatory Assets Non Current | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | $ (29) | $ 45 | $ (63) | $ 18

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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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