Condensed Consolidated Statements of Comprehensive Income (Unaudited) - GAS (Parenthetical) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Changes in fair value, tax | $ (4) | $ 11 | $ (4) | $ 16 |
| Qualifying hedges, reclassification adjustment, tax | 3 | (10) | 4 | (14) |
| Reclassification adjustment for amounts included in net income, tax | 0 | 0 | 0 | 0 |
| SOUTHERN Co GAS | ||||
| Changes in fair value, tax | (1) | (2) | 1 | 2 |
| Qualifying hedges, reclassification adjustment, tax | 1 | 0 | (2) | 0 |
| Reclassification adjustment for amounts included in net income, tax | $ 0 | $ 0 | $ 0 | $ 0 |