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Fair Value Measurements (Schedule Of Valuation Process And Unobservable Inputs) (Details) - Power $ in Millions | Jun. 30, 2022 USD ($) $ / MMBTU $ / MWh | Dec. 31, 2021 USD ($) $ / MWh $ / MMBTU
--- | --- | ---
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Derivative assets | $ | $ 39 | $ 13
Derivative liabilities | $ | $ (119) | $ (145)
Commodity Forward Price | Discounted cash flow | Minimum |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Measurement input | 36 | 32
Commodity Forward Price | Discounted cash flow | Maximum |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Measurement input | 122 | 55
Commodity Forward Price | Discounted cash flow | Weighted Average |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Measurement input | 65 | 40
Nodal Basis | Discounted cash flow | Minimum |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Measurement input | (17) | (14)
Nodal Basis | Discounted cash flow | Maximum |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Measurement input | 3 | 0
Nodal Basis | Discounted cash flow | Weighted Average |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Measurement input | (6) | (2)
Commodity Future Price | Discounted cash flow | Minimum |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Measurement input | $ / MMBTU | 0 |
Commodity Future Price | Discounted cash flow | Maximum |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Measurement input | $ / MMBTU | 3 |
Commodity Future Price | Discounted cash flow | Weighted Average |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Measurement input | $ / MMBTU | 2 | 0

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