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Regulatory Matters: Gas Utilities Regulatory Activity (Details) $ in Millions	Jul. 12, 2023 USD ($)	May 18, 2023 USD ($) mi	May 09, 2023 USD ($) mi	Jan. 26, 2023 USD ($)	Jun. 01, 2022 mi
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
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 27.0
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			10.49%
Colorado Public Utilities Commission (CPUC) | Black Hills Energy - Rocky Mountain Natural 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 - Rocky Mountain Natural 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 - Rocky Mountain Natural 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 - Rocky Mountain Natural 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 | Black Hills Energy - Wyoming 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		6,400
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 19.0
Public utilities, requested equity capital structure, percentage		52.00%
Public utilities, requested debt capital structure, percentage		48.00%
Public Utilities, Requested Return on Equity, Percentage		10.49%
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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