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Regulatory Matters: Gas Utilities Regulatory Activity (Details) $ in Millions | Jan. 26, 2023 USD ($) mi | Oct. 10, 2022 USD ($) Riders mi | Oct. 07, 2022 USD ($) mi | Dec. 30, 2021 USD ($) mi | Dec. 28, 2021 USD ($) | Jul. 06, 2021 | Jun. 01, 2021 USD ($) mi | Sep. 11, 2020
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Arkansas Public Service Commission (APSC) | Black Hills Energy - Arkansas Gas | Settlement agreement reached with APSC Staff and various intervenors |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  | $ 8.8 |  |  |  |  |  |
Public Utilities Number Of Former Riders Replaced With A New Comprehensive Safety And Integrity Rider | Riders |  | 3 |  |  |  |  |  |
Public Utilities Amount of System Safety and Integrety Rider Moved to Base Rates |  | $ 10.0 |  |  |  |  |  |
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 |  |  | 600 |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  | $ 12.3 |  |  |  |  |
Public Utilities, Approved Equity Capital Structure, Percentage |  |  | 52.00% |  |  |  |  |
Public Utilities, Approved Debt Capital Structure, Percentage |  |  | 48.00% |  |  |  |  |
Public Utilities, Requested Return on Equity, Percentage |  |  | 12.30% |  |  |  |  |
Public Utilities, Requested Term Extension of System Safety and Integrity Rider |  |  |  |  |  |  |  | 5 years
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 - Length of Natural Gas Pipeline to Receive Infrastructure Investments | mi |  |  |  |  |  |  | 7,000 |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  | $ 6.5 |
Public Utilities, Amount of Requested System Safety and Integrity Rider be Moved to Base Rates |  |  | $ 7.7 |  |  |  |  |
Public Utilities, Approved Equity Capital Structure, Percentage |  |  |  |  |  |  | 50.30% |
Public Utilities, Approved Debt Capital Structure, Percentage |  |  |  |  |  |  | 49.70% |
Public Utilities, Approved Return on Equity, Percentage |  |  |  |  |  |  | 9.20% |
Colorado Public Utilities Commission (CPUC) | Black Hills Energy - Colorado Gas | Rate Review Approved by Regulatory Agency |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Public Utilities, Term Extension of System Safety and Integrity Rider |  |  |  |  |  | 3 years |  |
Iowa Utilities Board (IUB) | Black Hills Energy - Iowa Gas | Settlement Reached 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, Approved Equity Capital Structure, Percentage |  |  |  |  | 50.00% |  |  |
Public Utilities, Approved Debt Capital Structure, Percentage |  |  |  |  | 50.00% |  |  |
Public Utilities, Approved Return on Equity, Percentage |  |  |  |  | 9.60% |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  | $ 3.7 |  |  |
Public Utilities Amount of System Safety and Integrety Rider Moved to Base Rates |  |  |  |  |  |  | $ 2.2 |
Kansas Corporation Commission (KCC) | Black Hills Energy, Kansas Gas | Global Settlement agreement with KCC Staff and various intervenors for a general rate increase and renewal of its safety and integrity rider. |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Public Utilities - Length of Natural Gas Pipeline to Receive Infrastructure Investments | mi |  |  |  | 4,600 |  |  |  |
Public Utilities Amount of System Safety and Integrety Rider Moved to Base Rates |  |  |  | $ 6.6 |  |  |  |
Public Utilities, Term Extension of System Safety and Integrity Rider |  |  |  | 5 years |  |  |  |
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 |  |  |  |  |  |
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 |  | 45.00% |  |  |  |  |  |
Public Utilities, Approved Debt Capital Structure, Percentage |  | 55.00% |  |  |  |  |  |
Public Utilities, Requested Return on Equity, Percentage |  | 9.60% |  |  |  |  |  |
Subsequent Event | 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 |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | $ 8.7 |  |  |  |  |  |  |
Public Utilities, Approved Equity Capital Structure, Percentage | 52.00% |  |  |  |  |  |  |
Public Utilities, Approved Debt Capital Structure, Percentage | 48.00% |  |  |  |  |  |  |
Public Utilities, Requested Return on Equity, Percentage | 9.75% |  |  |  |  |  |  |

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