RATE MATTERS - SWEPCo Rate Matters (Details) - 2025 Texas Base Rate Case - SOUTHWESTERN ELECTRIC POWER COMPANY - USD ($) $ in Millions |
1 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Oct. 31, 2025 |
|
| Public Utilities, General Disclosures [Line Items] | ||
| Requested annual base rate increase (decrease) | $ 164 | |
| Requested return on equity | 10.75% | |
| Requested debt capital structure | 48.00% | |
| Requested equity capital structure | 52.00% | |
| Requested net annual increase | $ 95 | |
| Approved annual base rate increase | $ 26 | |
| Approved return on equity | 9.60% | |
| Minimum | ||
| Public Utilities, General Disclosures [Line Items] | ||
| Requested annual base rate increase (decrease) | $ (36) | |
| Requested return on equity | 9.25% | |
| Maximum | ||
| Public Utilities, General Disclosures [Line Items] | ||
| Requested annual base rate increase (decrease) | $ (64) | |
| Requested return on equity | 9.44% | |
| Pirkey Plant | ||
| Public Utilities, General Disclosures [Line Items] | ||
| Regulatory asset, requested to recovery amount | $ 21 | |