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v3.23.3

Long-Term Debt (Narrative) (Details) $ in Millions | Jun. 08, 2023 USD ($) | Mar. 24, 2023 USD ($) | Sep. 30, 2023 USD ($) MW
--- | --- | --- | ---
NiSource |  |  |
Debt Instrument [Line Items] |  |  |
Senior Notes | $ 450.0 |  |
Rosewater |  |  |
Debt Instrument [Line Items] |  |  |
Nameplate Capacity | MW |  |  | 102
Senior Notes | NiSource |  |  |
Debt Instrument [Line Items] |  |  |
Senior Notes | $ 300.0 | $ 750.0 | $ 1,050.0
Debt, Weighted Average Interest Rate | 5.25% | 5.25% |
Proceeds from Debt, Net of Issuance Costs | $ 742.5 | $ 742.2 |
Unsecured Debt | NiSource |  |  |
Debt Instrument [Line Items] |  |  |
Debt, Weighted Average Interest Rate | 5.40% |  |

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