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v3.23.2

Fair Value (Unobservable Inputs related to Level 3 Assets and Liabilities) (Details) $ in Millions | Jun. 30, 2023 USD ($) $ / MMBTU $ / MWh | Dec. 31, 2022 USD ($) $ / MWh $ / MMBTU
--- | --- | ---
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | $ 1,356 | $ 1,922
Derivative Liabilities | (1,429) | (2,169)
Natural gas |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | 501 | 744
Derivative Liabilities | (583) | (1,018)
Electricity |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | 497 | 963
Derivative Liabilities | $ (487) | $ (935)
Level 3 | Natural gas | Forward basis price | Minimum | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MMBTU | (1.62) | (1.91)
Level 3 | Natural gas | Forward basis price | Maximum | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MMBTU | 4.59 | 39.94
Level 3 | Natural gas | Forward basis price | Weighted Average | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MMBTU | (0.07) | 0.18
Level 3 | Electricity | Forward basis price | Minimum | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MWh | (20.34) | (29.41)
Level 3 | Electricity | Forward basis price | Maximum | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MWh | 12.99 | 15.00
Level 3 | Electricity | Forward basis price | Weighted Average | Discounted Cash Flow |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Forward basis price | $ / MWh | (3.43) | (3.04)
Recurring | Level 3 |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | $ 338 | $ 390
Recurring | Level 3 | Natural gas |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | 167 | 135
Derivative Liabilities | (221) | (390)
Recurring | Level 3 | Electricity |  |
Unobservable Inputs Valuation Techniques [Line Items] |  |
Derivative Assets | 149 | 243
Derivative Liabilities | $ (153) | $ (276)

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