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v3.25.3

Revenue from Contracts with Customers and Lease Income - Schedule of Contract Balances (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Disaggregation of Revenue [Line Items] |  |
Accounts Receivable | $ 2,942 | $ 3,048
Contract Assets | 443 | 323
Contract Liabilities | 185 | 140
ALABAMA POWER CO |  |
Disaggregation of Revenue [Line Items] |  |
Accounts Receivable | 827 | 783
Contract Assets | 8 | 3
Contract Liabilities | 15 | 11
GEORGIA POWER CO |  |
Disaggregation of Revenue [Line Items] |  |
Accounts Receivable | 1,390 | 1,244
Contract Assets | 283 | 184
Contract Liabilities | 72 | 34
MISSISSIPPI POWER CO |  |
Disaggregation of Revenue [Line Items] |  |
Accounts Receivable | 137 | 113
Contract Assets | 0 | 0
Contract Liabilities | 2 | 0
SOUTHERN POWER CO |  |
Disaggregation of Revenue [Line Items] |  |
Accounts Receivable | 106 | 106
Contract Assets | 0 | 0
Contract Liabilities | 2 | 2
SOUTHERN Co GAS |  |
Disaggregation of Revenue [Line Items] |  |
Accounts Receivable | 331 | 660
Contract Assets | 74 | 72
Contract Liabilities | $ 0 | $ 3

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