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Financing and Leases - Georgia Power Lease Modification (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Lessor, Lease, Description [Line Items] |  |
Operating lease right-of-use assets, net of amortization | $ 1,430 | $ 1,432
GEORGIA POWER CO |  |
Lessor, Lease, Description [Line Items] |  |
Operating lease right-of-use assets, net of amortization | 903 | $ 884
GEORGIA POWER CO | Revision of Prior Period, Adjustment |  |
Lessor, Lease, Description [Line Items] |  |
Operating lease right-of-use assets, net of amortization | 8 |
Lease obligations | 10 |
Finance lease ROU assets, net | 44 |
Finance lease obligations | $ 45 |

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