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Qualifying Cash Flow Hedges (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Impact of Derivative Activity |  |  |  |
Fair Value Hedges, Net |  | $ 0 | $ 0 | $ 0
Not Designated as Hedging Instrument |  |  |  |
Impact of Derivative Activity |  |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax |  | 0 | 0 | 0
Derivative Instruments Gain (Loss) Reclassified To Regulatory Assets And Liabilities Net |  | (150,000,000) | (26,000,000) | 28,000,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |  | 0 | 0 | 0
Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) |  | 138,000,000 | (13,000,000) | 18,000,000
Derivative, Gain (Loss) on Derivative, Net |  | (34,000,000) | (2,000,000) | 41,000,000
Not Designated as Hedging Instrument | Commodity Trading Contract |  |  |  |
Impact of Derivative Activity |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |  | 0 | 0 | 0
Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) |  | 0 | 0 | 0
Derivative, Gain (Loss) on Derivative, Net | [1] | (7,000,000) | 25,000,000 | 63,000,000
Not Designated as Hedging Instrument | Electric Commodity Contract |  |  |  |
Impact of Derivative Activity |  |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax |  | 0 | 0 | 0
Derivative Instruments Gain (Loss) Reclassified To Regulatory Assets And Liabilities Net |  | (137,000,000) | (10,000,000) | 32,000,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |  | 0 | 0 | 0
Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) | [2] | (123,000,000) | (3,000,000) | 23,000,000
Derivative, Gain (Loss) on Derivative, Net |  | 0 | 0 | 0
Not Designated as Hedging Instrument | Natural Gas Commodity Contract |  |  |  |
Impact of Derivative Activity |  |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax |  | 0 | 0 | 0
Derivative Instruments Gain (Loss) Reclassified To Regulatory Assets And Liabilities Net |  | (13,000,000) | (16,000,000) | (4,000,000)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |  | 0 | 0 | 0
Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) | [3] | 15,000,000 | 10,000,000 | (5,000,000)
Derivative, Gain (Loss) on Derivative, Net | [3],[4] | (27,000,000) | (27,000,000) | (22,000,000)
Cash Flow Hedges | Designated as Hedging Instrument |  |  |  |
Impact of Derivative Activity |  |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax |  | (2,000,000) | 22,000,000 | 5,000,000
Derivative Instruments Gain (Loss) Reclassified To Regulatory Assets And Liabilities Net |  | 0 | 0 | 0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |  | (5,000,000) | (7,000,000) | (8,000,000)
Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) |  | 0 | 0 | 0
Derivative, Gain (Loss) on Derivative, Net |  | 0 | 0 | 0
Cash Flow Hedges | Designated as Hedging Instrument | Interest Rate Contract |  |  |  |
Impact of Derivative Activity |  |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax |  | (2,000,000) | 22,000,000 | 5,000,000
Derivative Instruments Gain (Loss) Reclassified To Regulatory Assets And Liabilities Net |  | 0 | 0 | 0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | [5] | (5,000,000) | (7,000,000) | (8,000,000)
Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) |  | 0 | 0 | 0
Derivative, Gain (Loss) on Derivative, Net |  | $ 0 | $ 0 | $ 0
[1] | Recorded to electric revenues. Presented amounts do not reflect non-derivative transactions or margin sharing with customers.
[2] | Recorded to electric fuel and purchased power. These derivative settlement gains and losses are shared with electric customers through fuel and purchased energy cost-recovery mechanisms and reclassified out of income as regulatory assets or liabilities, as appropriate. FTR settlements are shared with customers and do not have a material impact on net income. Presented amounts reflect changes in fair value between FTR auction and settlement dates, but exclude the original auction fair value.
[3] | Recorded to cost of natural gas sold and transported. These losses are subject to cost-recovery mechanisms and reclassified out of income to a regulatory asset, as appropriate.
[4] | Relates primarily to option premium amortization.
[5] | Recorded to interest charges.

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