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Early Plant Retirements/Asset Dispositions Early Plant Retirements/Asset Dispositions (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Early Plant Retirements [Abstract] |  |  |  |
ZEC Charge per kwh |  | $ 0.004 |  |
Proceeds from Divestiture of Businesses |  | 1,920,000,000 |  |
Impairment of Long-Lived Assets to be Disposed of | $ 519,000,000 | 43,000,000 |  | $ 2,691,000,000
ZEC Charge per MWh |  | 10 |  |
Early Plant Retirements/Asset Dispositions [Line Items] |  |  |  |
Impairment of Long-Lived Assets to be Disposed of | $ 519,000,000 | 43,000,000 |  | $ 2,691,000,000
Proceeds from Divestiture of Businesses |  | $ 1,920,000,000 |  |
Other Production-Solar |  |  |  |
Early Plant Retirements [Abstract] |  |  |  |
Gain (Loss) on Disposition |  |  | $ 63,000,000 |
Deferred ITC previously recognized |  |  | 185,000,000 |
Disposal group, gain (loss) on sale tax impact |  |  | 62,000,000 |
Early Plant Retirements/Asset Dispositions [Line Items] |  |  |  |
Gain (Loss) on Disposition |  |  | 63,000,000 |
Deferred ITC previously recognized |  |  | 185,000,000 |
Disposal group, gain (loss) on sale tax impact |  |  | $ 62,000,000 |

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