Commitments and Contingencies (Details) - PI Outage Prudency Review - USD ($) $ in Millions |
Jun. 30, 2025 |
May 01, 2025 |
|---|---|---|
| Commitments and Contingencies Disclosure [Abstract] | ||
| NSP testimony - Prairie Island Outage Prudency Review | $ 6 | |
| NSP-Minnesota estimated refund - PI Outage Prudency Review | $ 34 |