Condensed Consolidated Statements of Comprehensive Income (Unaudited) - SPC (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 |
| Reclassification adjustment for amounts included in net income, tax | 3 | (10) | 4 | (14) |
| SOUTHERN POWER CO | ||||
| Changes in fair value, tax | (2) | 11 | (5) | 17 |
| Reclassification adjustment for amounts included in net income, tax | $ 1 | $ (10) | $ 4 | $ (15) |