Regulatory Matters (Narrative) (Details) $ in Millions |
6 Months Ended | |
|---|---|---|
|
Jun. 30, 2026
USD ($)
MW
|
Dec. 31, 2025
USD ($)
|
|
| Public Utilities, General Disclosures [Line Items] | ||
| Regulatory Assets, Noncurrent | $ 2,360.8 | $ 2,225.2 |
| Regulatory Liability, Noncurrent | 1,586.2 | $ 1,513.3 |
| Sections 205, 202 (c), and 309 Emergency order Cost Recovery | 38.0 | |
| Emergency Order 202c | ||
| Public Utilities, General Disclosures [Line Items] | ||
| Regulatory Liability, Noncurrent | 33.5 | |
| Emergency Order 202c | ||
| Public Utilities, General Disclosures [Line Items] | ||
| Regulatory Assets, Noncurrent | $ 102.2 | |
| Rosewater | ||
| Public Utilities, General Disclosures [Line Items] | ||
| Nameplate Capacity | MW | 102 |