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Regulatory Matters: Rate Review (Details) $ in Millions	Oct. 10, 2022 USD ($) riders	Oct. 07, 2022 USD ($) mi	Jun. 01, 2022 USD ($) mi	Dec. 10, 2021 mi
Rate Review Filed with the Regulatory Agency | Arkansas Public Service Commission | Black Hills Energy, Arkansas
Public Utilities, General Disclosures [Line Items]
Public Utilities, Length of Natural Gas Pipeline to Receive Infrastructure Investments | mi				7,200
Rate Review Filed with the Regulatory Agency | Colorado Public Utilities Commission | Rocky Mountain Natural Gas | Subsequent Event
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, Requested Equity Capital Structure, Percentage		52.00%
Public Utilities, Requested Debt Capital Structure, Percentage		48.00%
Public Utilities, Requested Return on Equity, Percentage		12.30%
Public Utilities, Amount of Requested System Safety and Integrity Rider be Moved to Base Rates		$ 7.7
Rate Review Filed with the Regulatory Agency | Wyoming Public Service Commission | Wyoming Electric
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 15.0
Public Utilities, Requested Equity Capital Structure, Percentage			54.00%
Public Utilities, Requested Debt Capital Structure, Percentage			46.00%
Public Utilities, Requested Return on Equity, Percentage			10.30%
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
Settlement agreement reached with APSC Staff and various intervenors | Arkansas Public Service Commission | Black Hills Energy, Arkansas | Subsequent Event
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, Approved Return on Equity, Percentage	9.60%
Public Utilities, Amount of System Safety and Integrity Rider Moved to Base Rates	$ 10.0
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

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