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Regulatory Matters: Electric Utilities Regulatory Activity (Details) - Black Hills Energy - Colorado Electric - Colorado Public Utilities Commission (CPUC) $ in Millions	Nov. 22, 2024 USD ($)	Jun. 14, 2024 USD ($) mi
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%
Rebuttal Testimony with Updated Request
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount | $	$ 25.1
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	9.80%

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Percentage of public utility's requested debt to capital, including debt and equity.

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