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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, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | $ (52) | $ 33 | $ (327) | $ 415
Total deferred gains/(losses) | 55 | 82 | (385) | 170
Net deferred gains/(losses) | 3 | 115 | (712) | 585
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | 37 | 26 | 95
Gas purchased for resale |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | (3) | 4 | 3
Non-utility |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | (6) | 17 | (22)
Other operations and maintenance expense |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | 2 | 0 | 5
Other interest expense |  |  |  |
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | 44 | 5 | 109
Deferred Derivative Gains, Current |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (61) | 10 | (210) | 348
Deferred Derivative Gains, Noncurrent |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | 9 | 23 | (117) | 67
Deferred Derivative Losses, Current |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | 40 | 46 | 25 | 10
Recoverable Energy Costs, Current |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (84) | 32 | (376) | 190
Deferred Derivative Losses, Noncurrent |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | 99 | 4 | (34) | (30)
CECONY | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (49) | 28 | (298) | 381
Total deferred gains/(losses) | 52 | 77 | (364) | 154
Net deferred gains/(losses) | 3 | 105 | (662) | 535
Pre-tax gains/(losses) recognized in income |  |  |  |
Total pre-tax gains/(losses) recognized in income | 0 | 2 | 0 | 5
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 | 0 | 2 | 0 | 5
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 | Deferred Derivative Gains, Current | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (57) | 8 | (194) | 319
CECONY | Deferred Derivative Gains, Noncurrent | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | 8 | 20 | (104) | 62
CECONY | Deferred Derivative Losses, Current | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | 37 | 40 | 25 | 9
CECONY | Recoverable Energy Costs, Current | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | (81) | 30 | (355) | 172
CECONY | Deferred Derivative Losses, Noncurrent | Subsidiaries |  |  |  |
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations: |  |  |  |
Total deferred gains/(losses) | $ 96 | $ 7 | $ (34) | $ (27)

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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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