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CONTINGENCIES, COMMITMENTS, AND GUARANTEES (Tables) | 12 Months Ended
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Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract] |
Schedule of regulatory assets and liabilities | At December 31, 2023 and 2022, the environmental remediation liability and the balance of under recovered environmental remediation costs were reflected in the balance sheets of Southern Company, Georgia Power, and Southern Company Gas as shown in the table below. Alabama Power and Mississippi Power did not have environmental remediation liabilities at December 31, 2023 or 2022.
| Southern Company | Georgia Power | Southern Company Gas
| (in millions)
December 31, 2023: |  |  |
Environmental remediation liability: |  |  |
Other current liabilities | $ | 44 |  | $ | 14 |  | $ | 30 |
Accrued environmental remediation | 192 |  | — |  | 192 |
Under recovered environmental remediation costs: |  |  |
Other regulatory assets, current | $ | 45 |  | $ | 5 |  | $ | 40 |
Other regulatory assets, deferred | 210 |  | 15 |  | 195 |
December 31, 2022: |  |  |
Environmental remediation liability: |  |  |
Other current liabilities | $ | 65 |  | $ | 15 |  | $ | 49 |
Accrued environmental remediation | 207 |  | — |  | 207 |
Under recovered environmental remediation costs: |  |  |
Other regulatory assets, current | $ | 59 |  | $ | 5 |  | $ | 54 |
Other regulatory assets, deferred | 235 |  | 20 |  | 215 |
Expected future contractual obligations | Southern Company Gas' expected future contractual obligations for pipeline charges, storage capacity, and gas supply that are not recognized on the balance sheets at December 31, 2023 were as follows:
| Pipeline Charges, Storage Capacity, and Gas Supply
| (in millions)
2024 | $ | 587 |
2025 | 432 |
2026 | 231 |
2027 | 148 |
2028 | 103 |
Thereafter | 785 |
Total | $ | 2,286 |

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- Definition Tabular disclosure of contractual obligation by timing of payment due. Includes, but is not limited to, long-term debt obligation, lease obligation, and purchase obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (S-X 210.12-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 + Details
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- Definition The entire disclosure for detailed information about regulatory assets and liabilities, including current and noncurrent assets created when regulatory agencies permit the deferral of costs to the balance sheet that would otherwise be required to appear on the company's income statement and would be charged against current expenses or revenues, as well as current and noncurrent liabilities created when regulatory agencies permit. + References No definition available. + Details
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