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Regulatory Matters: Gas Utilities Regulatory Activity (Details) $ in Millions | May 01, 2024 USD ($) mi | Mar. 26, 2024 USD ($) | Jan. 17, 2024 USD ($) | Dec. 04, 2023 USD ($) mi | May 18, 2023 mi | May 09, 2023 mi
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Colorado Public Utilities Commission (CPUC) | Black Hills Energy - Colorado Gas | Rate Review Filed with the Regulatory Agency |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities - Length of Natural Gas Pipeline to Receive Infrastructure Investments | mi |  |  |  |  |  | 10,000
Colorado Public Utilities Commission (CPUC) | Black Hills Energy - Colorado Gas | Settlement Reached with the Regulatory Agency |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Approved Equity Capital Structure, Percentage |  | 51.00% |  |  |  |
Public Utilities, Approved Debt Capital Structure, Percentage |  | 49.00% |  |  |  |
Public Utilities, Approved Return on Equity, Percentage |  | 9.30% |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount | $ |  | $ 20.2 |  |  |  |
Iowa Utilities Board (IUB) | Black Hills Energy - Iowa Gas | Rate Review Filed with the Regulatory Agency |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities - Length of Natural Gas Pipeline to Receive Infrastructure Investments | mi | 5,000 |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | $ | $ 20.7 |  |  |  |  |
Public utilities, requested equity capital structure, percentage | 51.00% |  |  |  |  |
Public utilities, requested debt capital structure, percentage | 49.00% |  |  |  |  |
Public Utilities, Requested Return on Equity, Percentage | 10.50% |  |  |  |  |
Arkansas Public Service Commission | Black Hills Energy - Arkansas Gas | Rate Review Filed with the Regulatory Agency |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities - Length of Natural Gas Pipeline to Receive Infrastructure Investments | mi |  |  |  | 7,200 |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | $ |  |  |  | $ 44.1 |  |
Arkansas Public Service Commission | Black Hills Energy - Arkansas Gas | Settlement agreement reached with APSC Staff and various intervenors |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Approved Equity Capital Structure, Percentage |  |  |  | 48.00% |  |
Public Utilities, Approved Debt Capital Structure, Percentage |  |  |  | 52.00% |  |
Public Utilities, Requested Return on Equity, Percentage |  |  |  | 10.50% |  |
Wyoming Public Service Commission | Black Hills Energy - Wyoming Gas | WPSC Approved a Settlement Agreement for a General Rate Increase |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities - Length of Natural Gas Pipeline to Receive Infrastructure Investments | mi |  |  |  |  | 6,400 |
Public Utilities, Approved Equity Capital Structure, Percentage |  |  | 51.00% |  |  |
Public Utilities, Approved Debt Capital Structure, Percentage |  |  | 49.00% |  |  |
Public Utilities, Approved Return on Equity, Percentage |  |  | 9.90% |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount | $ |  |  | $ 13.9 |  |  |
Extension period as per settlement agreement |  |  | 4 years |  |  |

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