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Derivative Instruments and Hedging Activities - Fair Values of Commodity Derivatives Including Offsetting (Details) - USD ($) | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair value of derivative assets |  |
Net Amounts of Assets/ (Liabilities) | $ 1,037,000,000 | $ 832,000,000
Fair value of derivative liabilities |  |
Net Amounts of Assets/ (Liabilities) | (101,000,000) | (236,000,000)
Net fair value derivative assets/(liabilities) |  |
Gross Amounts of Recognized Assets/(Liabilities) | 690,000,000 | (8,000,000)
Gross Amounts Offset | (289,000,000) | (24,000,000)
Net Amounts of Assets/ (Liabilities) | 401,000,000 | (32,000,000)
Interest Rate Swap |  |
Fair value of derivative assets |  |
Net Amounts of Assets/ (Liabilities) | 105,000,000 | 4,000,000
Fair value of derivative liabilities |  |
Net Amounts of Assets/ (Liabilities) | 0 | (57,000,000)
CECONY | Subsidiaries |  |
Fair value of derivative assets |  |
Net Amounts of Assets/ (Liabilities) | 836,000,000 | 728,000,000
Fair value of derivative liabilities |  |
Net Amounts of Assets/ (Liabilities) | (65,000,000) | (128,000,000)
Net fair value derivative assets/(liabilities) |  |
Gross Amounts of Recognized Assets/(Liabilities) | 518,000,000 | 25,000,000
Gross Amounts Offset | (261,000,000) | (26,000,000)
Net Amounts of Assets/ (Liabilities) | 257,000,000 | (1,000,000)
Clean Energy Businesses | Interest Rate Swap |  |
Net fair value derivative assets/(liabilities) |  |
Notional amount | 996,000,000 | 1,031,000,000
Total fair value of derivative assets, Noncurrent | Interest Rate Swap |  |
Fair value of derivative assets |  |
Net Amounts of Assets/ (Liabilities) | 84,000,000 | 4,000,000
Total fair value of derivative liabilities |  |
Fair value of derivative liabilities |  |
Gross Amounts of Recognized Assets/(Liabilities) | (280,000,000) | (383,000,000)
Gross Amounts Offset | 179,000,000 | 147,000,000
Net Amounts of Assets/ (Liabilities) | (101,000,000) | (236,000,000)
Total fair value of derivative liabilities | CECONY | Subsidiaries |  |
Fair value of derivative liabilities |  |
Gross Amounts of Recognized Assets/(Liabilities) | (184,000,000) | (181,000,000)
Gross Amounts Offset | 119,000,000 | 53,000,000
Net Amounts of Assets/ (Liabilities) | (65,000,000) | (128,000,000)
Fair value of derivative liabilities, Current |  |
Fair value of derivative liabilities |  |
Gross Amounts of Recognized Assets/(Liabilities) | (212,000,000) | (289,000,000)
Gross Amounts Offset | 142,000,000 | 137,000,000
Net Amounts of Assets/ (Liabilities) | (70,000,000) | (152,000,000)
Fair value of derivative liabilities, Current | Interest Rate Swap |  |
Fair value of derivative liabilities |  |
Net Amounts of Assets/ (Liabilities) |  | (20,000,000)
Fair value of derivative liabilities, Current | CECONY | Subsidiaries |  |
Fair value of derivative liabilities |  |
Gross Amounts of Recognized Assets/(Liabilities) | (134,000,000) | (131,000,000)
Gross Amounts Offset | 84,000,000 | 43,000,000
Net Amounts of Assets/ (Liabilities) | (50,000,000) | (88,000,000)
Fair value of derivative liabilities, Noncurrent |  |
Fair value of derivative liabilities |  |
Gross Amounts of Recognized Assets/(Liabilities) | (68,000,000) | (94,000,000)
Gross Amounts Offset | 37,000,000 | 10,000,000
Net Amounts of Assets/ (Liabilities) | (31,000,000) | (84,000,000)
Fair value of derivative liabilities, Noncurrent | Interest Rate Swap |  |
Fair value of derivative liabilities |  |
Net Amounts of Assets/ (Liabilities) |  | (38,000,000)
Fair value of derivative liabilities, Noncurrent | CECONY | Subsidiaries |  |
Fair value of derivative liabilities |  |
Gross Amounts of Recognized Assets/(Liabilities) | (50,000,000) | (50,000,000)
Gross Amounts Offset | 35,000,000 | 10,000,000
Net Amounts of Assets/ (Liabilities) | (15,000,000) | (40,000,000)
Fair value of derivative assets, Current | Interest Rate Swap |  |
Fair value of derivative assets |  |
Net Amounts of Assets/ (Liabilities) | 21,000,000 |
Fair value of derivative assets, Current |  |
Fair value of derivative assets |  |
Gross Amounts of Recognized Assets/(Liabilities) | 667,000,000 | 285,000,000
Gross Amounts Offset | (415,000,000) | (158,000,000)
Net Amounts of Assets/ (Liabilities) | 252,000,000 | 127,000,000
Fair value of derivative assets, Current | CECONY | Subsidiaries |  |
Fair value of derivative assets |  |
Gross Amounts of Recognized Assets/(Liabilities) | 521,000,000 | 135,000,000
Gross Amounts Offset | (335,000,000) | (64,000,000)
Net Amounts of Assets/ (Liabilities) | 186,000,000 | 71,000,000
Total fair value of derivative assets, Noncurrent |  |
Fair value of derivative assets |  |
Gross Amounts of Recognized Assets/(Liabilities) | 303,000,000 | 90,000,000
Gross Amounts Offset | (53,000,000) | (13,000,000)
Net Amounts of Assets/ (Liabilities) | 250,000,000 | 77,000,000
Total fair value of derivative assets, Noncurrent | CECONY | Subsidiaries |  |
Fair value of derivative assets |  |
Gross Amounts of Recognized Assets/(Liabilities) | 181,000,000 | 71,000,000
Gross Amounts Offset | (45,000,000) | (15,000,000)
Net Amounts of Assets/ (Liabilities) | 136,000,000 | 56,000,000
Total fair value of derivative assets |  |
Fair value of derivative assets |  |
Gross Amounts of Recognized Assets/(Liabilities) | 970,000,000 | 375,000,000
Gross Amounts Offset | (468,000,000) | (171,000,000)
Net Amounts of Assets/ (Liabilities) | 502,000,000 | 204,000,000
Net fair value derivative assets/(liabilities) |  |
Margin deposits | 4,000,000 | 1,000,000
Total fair value of derivative assets | CECONY | Subsidiaries |  |
Fair value of derivative assets |  |
Gross Amounts of Recognized Assets/(Liabilities) | 702,000,000 | 206,000,000
Gross Amounts Offset | (380,000,000) | (79,000,000)
Net Amounts of Assets/ (Liabilities) | 322,000,000 | 127,000,000
Net fair value derivative assets/(liabilities) |  |
Margin deposits | $ 4,000,000 | $ 0

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