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v3.25.1

Long-Term Debt (Narrative) (Details) $ in Millions | Mar. 27, 2025 USD ($) | Mar. 31, 2025 MW
--- | --- | ---
Rosewater |  |
Debt Instrument [Line Items] |  |
Nameplate Capacity | MW |  | 102
Senior Notes | NiSource |  |
Debt Instrument [Line Items] |  |
Senior Notes | $ 750.0 |
Debt, Weighted Average Interest Rate | 5.85% |
Proceeds from Debt, Net of Issuance Costs | $ 739.6 |

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