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Regulatory Matters: Gas Utilities Regulatory Activity (Details) $ in Millions | Apr. 07, 2023 USD ($) | Jan. 26, 2023 USD ($) | Jun. 01, 2022 mi
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Colorado Public Utilities Commission (CPUC) | Black Hills Energy - Colorado Gas | Settlement agreement reached with CPUC Staff and various intervenors, subject to the review and approval by an Administrative Law Judge and the CPUC. |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Public Utilities Amount of System Safety and Integrity Rider Moved to Base Rates and Termination of the System Safety and Integrity Rider | $ 8.3 |  |
Colorado Public Utilities Commission (CPUC) | Black Hills Energy - Colorado Gas | Settlement Reached with the Regulatory Agency |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Weighted average cost of capital | 6.93% |  |
Public Utilities, Approved Rate Increase (Decrease), Amount | $ 8.2 |  |
Colorado Public Utilities Commission (CPUC) | Black Hills Energy - Colorado Gas | Settlement Reached with the Regulatory Agency | Minimum |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Public Utilities, Approved Equity Capital Structure, Percentage | 50.00% |  |
Public Utilities, Approved Debt Capital Structure, Percentage | 50.00% |  |
Public Utilities, Approved Return on Equity, Percentage | 9.50% |  |
Colorado Public Utilities Commission (CPUC) | Black Hills Energy - Colorado Gas | Settlement Reached with the Regulatory Agency | Maximum |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Public Utilities, Approved Equity Capital Structure, Percentage | 52.00% |  |
Public Utilities, Approved Debt Capital Structure, Percentage | 48.00% |  |
Public Utilities, Approved Return on Equity, Percentage | 9.70% |  |
Wyoming Public Service Commission | Wyoming Electric | Rate Review Filed with the Regulatory Agency |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Public Utilities - Length of Electric Distribution Lines to Receive Infrastructure Investments | mi |  |  | 1,330
Public Utilities - Length of Electric Transmission Lines to Receive Infrastructure Investments | mi |  |  | 59
Wyoming Public Service Commission | Wyoming Electric | Settlement Reached with the Regulatory Agency |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Public Utilities, Approved Equity Capital Structure, Percentage |  | 52.00% |
Public Utilities, Approved Debt Capital Structure, Percentage |  | 48.00% |
Public Utilities, Approved Return on Equity, Percentage |  | 9.75% |
Public Utilities, Approved Rate Increase (Decrease), Amount |  | $ 8.7 |

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