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v3.23.3

Fair Value (Unobservable Inputs related to Level 3 Assets and Liabilities) (Details) $ in Millions | Sep. 30, 2023 USD ($) $ / MMBTU $ / MWh | Dec. 31, 2022 USD ($) $ / MWh $ / MMBTU
--- | --- | ---
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | $ 968 | $ 1,922
Derivative Liabilities | (970) | (2,169)
Natural gas |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | 441 | 744
Derivative Liabilities | (476) | (1,018)
Electricity |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | 333 | 963
Derivative Liabilities | $ (318) | $ (935)
Level 3 | Natural gas | Forward basis price | Minimum | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MMBTU | (1.69) | (1.91)
Level 3 | Natural gas | Forward basis price | Maximum | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MMBTU | 4.79 | 39.94
Level 3 | Natural gas | Forward basis price | Weighted Average | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MMBTU | 0.01 | 0.18
Level 3 | Electricity | Forward basis price | Minimum | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MWh | (17.56) | (29.41)
Level 3 | Electricity | Forward basis price | Maximum | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MWh | 12.03 | 15.00
Level 3 | Electricity | Forward basis price | Weighted Average | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MWh | (4.15) | (3.04)
Recurring | Level 3 |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | $ 285 | $ 390
Recurring | Level 3 | Natural gas |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | 158 | 135
Derivative Liabilities | (186) | (390)
Recurring | Level 3 | Electricity |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | 110 | 243
Derivative Liabilities | $ (106) | $ (276)

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