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LEASES - Undiscounted Cash Flows to be Received Under PPAs Accounted for as Operating Leases (Details) $ in Millions | Dec. 31, 2024 USD ($)
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Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract] |
2025 | $ 117
2026 | 111
2027 | 109
2028 | 109
2029 | 112
Thereafter | 621
Total | 1,179
Alabama Power |
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract] |
2025 | 6
2026 | 5
2027 | 4
2028 | 4
2029 | 3
Thereafter | 31
Total | 53
Southern Power |
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract] |
2025 | 142
2026 | 148
2027 | 150
2028 | 161
2029 | 164
Thereafter | 506
Total | 1,271
Southern Company Gas |
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract] |
2025 | 35
2026 | 29
2027 | 28
2028 | 28
2029 | 28
Thereafter | 326
Total | $ 474

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- Definition Amount of lease payment to be received by lessor for operating lease in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-12 + Details
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