INCOME TAXES - Amortization of Deferred Credits (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Income Tax Disclosure [Line Items] | |||
| Amortization of investment tax credits | $ 109 | $ 84 | $ 83 |
| Southern Power | |||
| Income Tax Disclosure [Line Items] | |||
| Amortization of investment tax credits | $ 58 | $ 58 | $ 58 |