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Regulatory Matters: Gas Utilities Recent Regulatory Activity (Details) $ in Millions						1 Months Ended
	Feb. 03, 2025 USD ($) mi	Dec. 02, 2024 USD ($)	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 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%
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
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
Iowa Utilities Commission (IUC) | Black Hills Energy - Iowa Gas | Received Final Approval from the IUC for a Settlement Agreement for a General Rate Increase
Public Utilities, General Disclosures [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount | $		$ 15.0
Weighted average cost of capital		7.20%
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 | 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, Approved Return on Equity, Percentage			9.90%
Public Utilities, Approved Shift Rate Rider Rate to Base Rate | $			$ 3.7
Public Utilities, Approved Rate Increase (Decrease), Amount | $			$ 25.4
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
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, Approved Equity Capital Structure, Percentage					51.00%
Public Utilities, Approved Debt Capital Structure, Percentage					49.00%
Public Utilities, Approved Return on Equity, Percentage					9.85%
Public Utilities, Approved Rate Increase (Decrease), Amount | $					$ 13.9
Extension period as per settlement agreement					4 years
Subsequent Event | Kansas Corporation Commission (KCC) | Black Hills Energy, Kansas 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	4,765
Public Utilities, Requested Rate Increase (Decrease), Amount | $	$ 17.2
Public utilities, requested equity capital structure, percentage	50.00%
Public utilities, requested debt capital structure, percentage	50.00%
Public Utilities, Requested Return on Equity, Percentage	10.50%

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