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Regulatory Matters: Gas Utilities Regulatory Activity (Details) $ in Millions					1 Months Ended
	Oct. 15, 2024 USD ($)	Oct. 01, 2024 USD ($)	Jun. 14, 2024 USD ($) mi	Jan. 17, 2024 USD ($)	Mar. 31, 2024 USD ($)	May 01, 2024 mi	Dec. 04, 2023 mi	May 18, 2023 mi	May 09, 2023 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
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
Colorado Public Utilities Commission (CPUC) | Black Hills Energy - Colorado 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			3,200
Public Utilities - Length of Electric Transmission Lines to Receive Infrastructure Investments | mi			600
Public Utilities, Requested Rate Increase (Decrease), Amount | $			$ 36.7
Public utilities, requested equity capital structure, percentage			53.00%
Public utilities, requested debt capital structure, percentage			47.00%
Public Utilities, Requested Return on Equity, Percentage			10.50%
Iowa Utilities Commission (IUC) | 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
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
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
Subsequent Event | Iowa Utilities Commission (IUC) | Black Hills Energy - Iowa Gas | Reached a Global Settlement Agreement with the Iowa Office of Consumer Advocate for a General Rate Increase, which is Subject to IUC Approval
Public Utilities, General Disclosures [Line Items]
Public Utilities Weighted average cost of capital percentage	7.20%
Public Utilities, Approved Rate Increase (Decrease), Amount | $	$ 15.0
Subsequent Event | Arkansas Public Service Commission | Black Hills Energy - Arkansas Gas | Received Final Approval for a Settlement Agreement for a General Rate Increase
Public Utilities, General Disclosures [Line Items]
Public Utilities, Approved Equity Capital Structure, Percentage		46.00%
Public Utilities, Approved Debt Capital Structure, Percentage		54.00%
Public Utilities, Requested Return on Equity, Percentage		9.90%
Public Utilities, Approved Rate Increase (Decrease), Amount | $		$ 25.4
Public Utilities, Approved Shift Rate Rider Rate to Base Rate | $		$ 3.7

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