Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Interest capitalized | $ 36 | $ 35 |
| ALABAMA POWER CO | ||
| Interest capitalized | 10 | 10 |
| GEORGIA POWER CO | ||
| Interest capitalized | 16 | 12 |
| MISSISSIPPI POWER CO | ||
| Interest received | 1 | 0 |
| SOUTHERN POWER CO | ||
| Interest capitalized | 7 | 10 |
| SOUTHERN Co GAS | ||
| Interest capitalized | $ 3 | $ 3 |