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Regulatory Matters - GPC Nuclear Construction (Details) - GEORGIA POWER CO - Plant Vogtle Units 3 And 4 $ in Millions | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 USD ($) | Dec. 31, 2012 utility MW | Aug. 31, 2018
Loss Contingencies [Line Items] |  |  |
Proportionate ownership share | 45.70% |  |
Number of construction units approved | utility |  | 2 |
Electric generating capacity in mega watts under consortium agreement | MW |  | 1,100 |
Estimated cost to complete, construction contingency estimate, financing costs | $ 3,500 |  |
Estimated cost to complete, construction contingency estimate, financing costs, incurred to date | 3,400 |  |
Construction contingency estimate | 43 |  |
Monthly AFUDC | $ 45 |  |
Percentage of ownership interest required for voting for continuing construction |  |  | 90.00%
Vogtle Owners |  |  |
Loss Contingencies [Line Items] |  |  |
Period of notice required in the event letters of credit are not renewed | 30 days |  |
Minimum | COVID-19 |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, estimate of possible loss, loss of productivity, term | 3 months |  |
Maximum | COVID-19 |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, estimate of possible loss, loss of productivity, term | 4 months |  |
Estimate of possible loss | $ 200 |  |

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