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Dispositions (Narrative) (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 6 Months Ended | 35 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 04, 2025 | Jul. 27, 2025 | Jun. 30, 2024 | Jun. 30, 2028 | Dec. 31, 2027 | Jun. 30, 2027 | Dec. 31, 2026 | Jun. 30, 2026 | Jun. 30, 2024 | Jun. 30, 2028 | Dec. 31, 2024 | Oct. 25, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate investment from noncontrolling owner |  |  | $ 47 |  |  |  |  |  | $ 47 |  |  |
Subsequent event | Florida Progress LLC | Forecast |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling ownership percentage |  |  |  | 19.70% |  |  |  | 9.20% |  | 19.70% |  |
Aggregate investment from noncontrolling owner |  |  |  | $ 1,000 | $ 1,500 | $ 500 | $ 200 | $ 2,800 |  | $ 6,000 |  |
Investment Agreement, termination fee | $ 240 |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations, Disposed of by Sale | Piedmont's Tennessee Business | Subsequent event |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration to be received |  | $ 2,480 |  |  |  |  |  |  |  |  |  |
Purchase Agreement termination fee, percentage |  | 6.50% |  |  |  |  |  |  |  |  |  |
Discontinued Operations, Disposed of by Sale | Commercial Renewables |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration to be received |  |  |  |  |  |  |  |  |  |  |  | $ 1,100
Consideration period |  |  |  |  |  |  |  |  |  |  |  | 18 months
Discontinued Operations, Disposed of by Sale | Commercial Renewables | Noncurrent assets |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration to be received |  |  |  |  |  |  |  |  |  |  | $ 551 |
Discontinued Operations, Held-for-sale | Commercial Renewables |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest balance |  |  |  |  |  |  |  |  |  |  | $ 18 |

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