Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments, Gain (Loss) [Table]
Entity Address, City or Town
Entity Address, City or Town
Derivative Asset, Fair Value, Gross Asset
Derivative Asset, Subject to Master Netting Arrangement, before Offset
Common Collective Trust - Fixed Income
Common Collective Trust, Fixed Income Fund
Common Collective Trust, Fixed Income Fund [Member]
Common Collective Trued, Fixed Income Fund [Member]
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Earnings per share of common stock:
Earnings Per Share [Abstract]
Fair Value, Inputs, Level 1
Fair Value, Inputs, Level 1
Fair Value, Inputs, Level 1 [Member]
Schedule of Accrued Liabilities
Schedule of Accrued Liabilities [Table Text Block]
Issuance of common stock
Stock Issued During Period, Value, New Issues
Financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net change in cash, restricted cash and cash equivalents
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect
Transportation
Transportation [Member]
Transportation [Member]
Other operating activities, net
Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Error Correction, Type [Axis]
Error Correction, Type [Axis]
Black Hills Wyoming and Wyoming Electric
Black Hills Wyoming and Wyoming Electric [Member]
Black Hills Wyoming and Wyoming Electric [Member]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Amendment Flag
Amendment Flag
Electricity
Electricity [Member]
Public Utilities, Amount of Requested System Safety and Integrity Rider be Moved to Base Rates
Public Utilities Amount Of Requested System Safety And Integrity Rider Be Moved To Base Rates
Public utilities amount of requested system safety and integrity rider be moved to base rates.
Accrued property, plant and equipment purchases at June 30,
Capital Expenditures Incurred but Not yet Paid
Regulated Operations [Abstract]
Regulated Operations [Abstract]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Amount outstanding
Short-Term Debt, Total
Notes payable
Short-Term Debt
Fuel, purchased power and cost of natural gas sold
Cost of Sales [Member]
Goodwill, Total
Goodwill
Goodwill, Beginning Balance
Goodwill, Ending Balance
Goodwill
Document Quarterly Report
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Hedge Funds
Hedge Funds, Multi-strategy [Member]
Decommissioning costs
Environmental Restoration Costs [Member]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification,Tax (Benefit)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax
Short-Term Debt [Line Items]
Statement [Table]
Statement [Table]
Other Postretirement Benefits Plan
Other Postretirement Benefits Plan [Member]
Number of operating segments
Number of Operating Segments
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Purchased Gas Cost Obligation
Purchased Gas Cost Obligation [Member]
Purchased Gas Cost Obligation [Member]
Auditor Firm ID
Auditor Firm ID
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months
Energy Related Inventory, Other Fossil Fuel
Fuel - Electric Utilities
Line of Credit Facility [Line Items]
Black Hills Corporation Pension Plan
Black Hills Retirement Plan [Member]
Black Hills Retirement Plan [Member]
2026
Defined Benefit Plan, Expected Future Benefit Payment, Year Four
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Product and Service [Axis]
Product and Service [Axis]
Number of shares issued
At The Market Equity Offering Program Shares Issued
At The Market Equity Offering Program Shares Issued
At The Market Equity Offering Program Shares Issued
Dividends paid on common stock
Payments of Dividends, Total
Payments of Dividends
Line of Credit Facility, Maximum Amount Outstanding During Period
Maximum amount outstanding (based on daily outstanding balances)
Wholesale
Wholesale [Member]
Wholesale [Member]
Fixed Income
Fixed Income Funds [Member]
Cumulative Effect, Period of Adoption, Adjustment
Cumulative Effect, Period of Adoption, Adjustment [Member]
Employee-related Liabilities, Current, Total
Accrued employee compensation, benefits and withholdings
Employee-related Liabilities, Current
Common Collective Trust, Cash And Cash Equivalents
Common Collective Trust, Cash And Cash Equivalents [Member]
Common Collective Trust, Cash And Cash Equivalents [Member]
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture, Total
Share-based compensation (in shares)
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture
Credit Risk Derivative Liabilities, at Fair Value
Collateral Already Posted, Aggregate Fair Value
Amounts reclassified from AOCI
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
TOTAL LIABILITIES AND TOTAL EQUITY
Liabilities and Equity
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net, Total
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Unbilled Receivables, Current
Unbilled Revenue
Derivative liabilities, current
Derivative Liability, Current
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Income Statement [Abstract]
Income Statement [Abstract]
Timing of Transfer of Good or Service [Axis]
Timing of Transfer of Good or Service [Axis]
Proceeds, (net of issuance costs)
At The Market Equity Program Proceeds from Sale of Stock
At The Market Equity Program Proceeds from Sale of Stock
At The Market Equity Program Proceeds from Sale of Stock
Unrealized Gain (Loss) on Cash Flow Hedging Instruments
Derivative, Gain on Derivative
Derivative, Liabilities, Fair Value Disclosure
Derivative Liability, Total
Derivative Liability
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Cash Flow Hedging
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Sale of Stock [Domain]
(Tax) benefit on benefit plan liability adjustments - net gain (loss)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax
Total current liabilities
Current liabilities
Liabilities, Current
Weighted average common shares outstanding:
Weighted Average Number of Shares Outstanding, Basic and Diluted [Abstract]
Weighted average number of shares of common stock, basic and diluted[Abstract]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Investment Redemption, Notice Period
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Investment Redemption, Notice Period
Fair Value, Measurements, Recurring
Fair Value, Recurring [Member]
(Tax) benefit on reclassification adjustment of benefit plan liability - prior service cost
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax
Arkansas Public Service Commission
Arkansas Public Service Commission [Member]
Arkansas Public Service Commission
Long-term Purchase Commitment, Category of Item Purchased [Domain]
Long-Term Purchase Commitment, Category of Item Purchased [Domain]
Energy [Axis]
Energy [Axis]
Error Correction, Other
Error Correction, Other [Member]
Treasury Stock, Shares, Total
Treasury stock, shares
Treasury Stock, Shares
Derivative Asset, Total
Derivative Assets, Fair Value Disclosure
Derivative Asset
Cumulative Effect, Period of Adoption [Axis]
Cumulative Effect, Period of Adoption [Axis]
State income tax expense (benefit)
State and Local Income Tax Expense (Benefit), Continuing Operations
State and Local Income Tax Expense (Benefit), Continuing Operations, Total
Corporate and Other
Corporate, Non-Segment
Corporate, Non-Segment [Member]
Intercompany Customers
Intercompany Customers [Member]
Intercompany Customers [Member]
Defined Contribution Plan, Company Retirement
Defined Contribution Plan, Company Retirement [Member]
The Company Retirement portion of the defined contribution plan in which there is no employee contribtuion required to receive a contribution. The contribution is based on a calculation of age and service. [Member]
Public Utilities Amount of System Safety and Integrety Rider Moved to Base Rates
Public Utilities Amount of System Safety and Integrety Rider Moved to Base Rates
Public Utilities Amount of System Safety and Integrety Rider Moved to Base Rates
Entity Small Business
Entity Small Business
Line of Credit Facility, Interest Rate at Period End
Weighted average interest rates
Over the Counter
Over-the-Counter [Member]
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Total
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents
Cash, restricted cash and cash equivalents beginning of period
Cash, restricted cash and cash equivalents end of period
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Member]
Number of shares issued
At The Market Equity Offering Program Share Issued But Not Settled
At the market equity offering program share issued but not settled.
(Tax) benefit on reclassification adjustment of benefit plan liability - net loss
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax, Total
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax
Distributions to non-controlling interests
Payments to Noncontrolling Interests
Total current assets
Current assets
Assets, Current
Public Utilities, Approved Return on Equity, Percentage
Public Utilities, Approved Return on Equity, Percentage
Schedule of Short-Term Debt [Table]
Weighted average shares - Basic (in shares)
Weighted Average Number of Shares Outstanding, Basic, Total
Basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
City Area Code
City Area Code
Components of Net Periodic Benefit Cost
Schedule of Net Benefit Costs [Table Text Block]
Accounts Receivable, before Allowance for Credit Loss, Current
Less: Allowance for Credit Losses
Billed Accounts Receivable
Derivative Instrument, Loss Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]
Employee benefit plan costs and related deferred taxes
Employee Benefit Plans And Related Deferred Taxes Liabilities [Member]
Employee benefit plans and related deferred taxes liabilities.
Other Comprehensive Income
Comprehensive Income (Loss) Note [Text Block]
Public Utilities, Requested Return on Equity, Percentage
Public Utilities, Requested Return on Equity, Percentage
Public utilities, amount of requested system safety and integrity rider be moved to base rates and termination
Settlement Total of Plan to Provide TCJA and State Tax Reform benefits to Customers
Settlement Total of Plan to Provide TCJA and State Tax Reform benefits to Customers
Settlement Total of Plan to Provide TCJA and State Tax Reform benefits to Customers
Federal Energy Regulatory Commission (FERC) Common Use System (CUS)
Federal Energy Regulatory Commission (FERC) Common Use System (CUS) [Member]
Federal Energy Regulatory Commission (FERC) Common Use System (CUS) [Member]
Document Period End Date
Document Period End Date
Payments of Stock Issuance Costs
Payments of Stock Issuance Costs
Restricted Stock
Restricted Stock [Member]
Dividends on common stock (usd per share)
Common Stock, Dividends, Per Share, Cash Paid
Black Hills Energy - Colorado Electric
Black Hills Energy - Colorado Electric [Member]
Black Hills Energy - Colorado Electric
Natural gas basis swaps purchased
Basis Swap [Member]
June 16, 2023 ATM Program
June Sixteen Twenty Twenty Three ATM Program [Member]
June 16, 2023 ATM program.
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Net periodic expense (benefit)
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Schedule of Segment Reporting Information, by Segment
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Wyoming Electric
Wyoming Electric [Member]
Wyoming Electric [Member]
Public utilities amount of requested system safety and integrity rider be moved to base rates and termination.
Public Utilities Amount Of Requested System Safety And Integrity Rider Be Moved To Base Rates and Termination
Public Utilities, Amount of Requested System Safety and Integrity Rider be Moved to Base Rates and Termination
Other current assets
Other Assets, Current
2023
Defined Benefit Plan, Expected Future Benefit Payment, Year One
Number of Years TCJA and State Tax Reform Benefits to be Provide to Customers
Number of Years TCJA and State Tax Reform Benefits to be Provide to Customers
Number of Years TCJA and State Tax Reform Benefits to be Provided to Customers
Total Assets
TOTAL ASSETS
Assets
Derivative Contract [Domain]
Derivative Contract [Domain]
Derivative Contract [Domain]
Contract Subject to Master Netting
Contract Subject to Master Netting Arrangement [Member]
Contract Subject to Master Netting Arrangement [Member]
Derivative [Line Items]
Derivative [Line Items]
Gas Price Derivatives - Term of Contract
Derivative, Term of Contract
Rate of increase in compensation levels
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase
Long-term debt, net of current maturities
Long-Term Debt, Excluding Current Maturities, Total
Long-term debt, net of current maturities
Long-Term Debt, Excluding Current Maturities
Total earnings (loss) per share of common stock, Diluted (usd per share)
Earnings Per Share, Diluted, Total
Earnings per share, Diluted (usd per share)
Earnings Per Share, Diluted
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Public Utilities - Length of Electric Distribution Lines to Receive Infrastructure Investments
Public Utilities - Length of Electric Distribution Lines to Receive Infrastructure Investments
Public Utilities - Length of Electric Distribution Lines to Receive Infrastructure Investments
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
Schedule of Short-term Debt
Schedule of Short-Term Debt [Table Text Block]
Income tax receivable, net
Income Taxes Receivable, Current
Black Hills Energy - Iowa Gas
Black Hills Energy - Iowa Gas [Member]
Black Hills Energy - Iowa Gas
Rate of increase in compensation levels
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Document Fiscal Period Focus
Document Fiscal Period Focus
Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]
Management's Statement
Defined Benefit Pension Plans
Pension Plan
Pension Plan [Member]
Revolving Credit Facility [Member]
Revolving Credit Facility
Derivative [Table]
Derivative [Table]
Other investing activities
Other investing activities
Payments for (Proceeds from) Other Investing Activities
Equity compensation (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements
Interest income
Investment Income, Interest
Net unrealized gains (losses) on commodity derivatives (net of tax of $(35), $734, $233 and $394, respectively)
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments, Tax, Total
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments, Tax
Net Cash Provided by (Used in) Financing Activities
Net cash (used in) financing activities
Other regulatory assets
Other Regulatory Assets [Member]
Other regulatory assets [Member]
Short-term Debt, Type [Axis]
Short-Term Debt, Type [Axis]
Federal Energy Regulatory Commission (FERC)
Federal Energy Regulatory Commission (FERC) [Member]
Federal Energy Regulatory Commission (FERC) [Member]
Schedule of Regulatory Assets and Liabilities
Schedule of Regulatory Assets and Liabilities [Table Text Block]
Schedule of Regulatory Assets and Liabilities
Public Utilities, Approved Rate Increase (Decrease), Amount
Public Utilities, Approved Rate Increase (Decrease), Amount
Recoveries and Other Additions
Accounts Receivable, Allowance for Credit Loss, Recovery
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
Gas Utilities
Gas Utilities [Member]
Gas Utilities [Member]
Entity File Number
Securities Act File Number
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Global Settlement agreement with KCC Staff and various intervenors for a general rate increase and renewal of its safety and integrity rider.
Global Settlement agreement with KCC Staff and various intervenors for a general rate increase and renewal of its safety and integrity rider. [Member]
Global Settlement agreement with KCC Staff and various intervenors for a general rate increase and renewal of its safety and integrity rider.
Derivative assets, current
Derivative Asset, Current
Public Utilities, Term Extension of System Saftey and Integrity Rider
Public Utilities, Term Extension of System Saftey and Integrity Rider
Public Utilities, Term Extension of System Saftey and Integrity Rider
Proceeds from Issuance of Debt
Proceeds from Issuance of Debt
Employee Benefit Plans
Retirement Benefits [Text Block]
Geographical [Domain]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Statement of Stockholders' Equity [Abstract]
Public Utilities - Length of Natural Gas Pipeline to Receive Infrastructure Investments
Public Utilities - Length of Natural Gas Pipeline to Receive Infrastructure Investments
Public Utilities - Length of Natural Gas Pipeline to Receive Infrastructure Investments
Annual TCJA-Related Customer Billing Credits
Annual TCJA-Related Customer Billing Credits
Annual TCJA-Related Customer Billing Credits
Sale of Stock [Axis]
Public Utilities General Disclosures [Table]
Public Utilities General Disclosures [Table]
Auditor Location
Auditor Location
Common Collective Trust - Real Estate
Real Estate Funds
Real Estate Funds [Member]
Regulatory Liability [Axis]
Regulatory Liability [Axis]
Fuel, purchased power and cost of natural gas sold
Fuel, purchased power and cost of natural gas sold
Fuel, Purchased Power and Cost of Gas Sold
Fuel costs incurred that are directly related to goods produced and sold and services rendered during the reporting period, combined with the amount of purchased power charged against earnings for the period, and cost of gas sold to customers for the period.
Legal Entity [Axis]
Legal Entity [Axis]
Stockholders' Equity Note [Abstract]
Stockholders' Equity Note [Abstract]
Fair Value, by Balance Sheet Grouping
Fair Value, by Balance Sheet Grouping [Table Text Block]
Subsequent Events [Abstract]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Market - off-system sales
Market Off-System Sales [Member]
Market Off-System Sales [Member]
Black Hills Energy, Kansas Gas
Black Hills Energy, Kansas Gas [Member]
Black Hills Energy, Kansas Gas
Common stock issued
Proceeds from Issuance of Common Stock
Long-Term Debt, Type [Axis]
2027-2031
Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years
Consolidated indebtedness to capitalization ratio
Ratio of Indebtedness to Net Capital
Deferred income taxes
Total Deferred
Deferred Income Tax Expense (Benefit)
Deferred income tax liabilities, net
Deferred Income Tax Liabilities, Net
Other financing activities
Proceeds from (Payments for) Other Financing Activities
Revenue
Revenue from Contract with Customer [Text Block]
External Customers
External Customers [Member]
External Customers
Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Derivative, Remaining Maturity
Derivative, Remaining Maturity
Derivative, Loss on Derivative
Derivative, Loss on Derivative
Accounts receivable and other current assets
Increase (Decrease) in Accounts Receivable and Other Operating Assets
Supplemental Balance Sheet Disclosures [Text Block]
Selected Balance Sheet Information
Accrued property taxes
Accrual for Taxes Other than Income Taxes, Current
Transmission Service Agreement
Transmission Service Agreement [Member]
Credit Facility [Domain]
Subsequent Events
Subsequent Events [Text Block]
Not Designated as Hedging Instrument
Not Designated as Hedging Instrument [Member]
Weighted average shares - diluted (in shares)
Diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Derivative, Nonmonetary Notional Amount
Derivative, Nonmonetary Notional Amount
Settlement of plan to provide TCJA-related customer billing credits to its customers
Settlement of plan to provide TCJA-related customer billing credits to its customers
Settlement of plan to provide TCJA-related customer billing credits to its customers. The billing credits, which represent a disposition of excess deferred income tax benefits resulting from the TCJA, will be delivered to customers in the next fiscal year.
Credit Facility [Axis]
Settlement agreement reached with CPUC Staff and various intervenors, subject to the review and approval by an Administrative Law Judge and the CPUC.
Settlement agreement reached with CPUC Staff and various intervenors, subject to the review and approval by an Administrative Law Judge and the CPUC. [Member]
Settlement agreement reached with CPUC Staff and various intervenors, subject to the review and approval by an Administrative Law Judge and the CPUC.
Defined Benefit Plan, Plan Assets, Amount
Beginning fair value of plan assets
Ending fair value of plan assets
Defined Benefit Plan, Plan Assets, Amount
Portion at Fair Value Measurement
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member] [Default]
Energy Related Derivative
Energy Related Derivative [Member]
Public Utilities, Requested Term Extension of System Safety and Integrity Rider
Public Utilities, Requested Term Extension of System Safety and Integrity Rider
Public Utilities, Requested Term Extension of System Safety and Integrity Rider
Schedule of Guarantor Obligations
Schedule of Guarantor Obligations [Table Text Block]
Commercial Paper
Commercial Paper [Member]
Segment Reporting, Asset Reconciling Item
Segment Reporting, Asset Reconciling Item [Line Items]
Current Fiscal Year End Date
Current Fiscal Year End Date
Other deferred credits and other liabilities
Derivative Liabilities, Noncurrent
Derivative Liabilities, Noncurrent [Member]
Line item in the statement of financial position in a classified presentation in which the fair value amounts of the derivative instruments are included.
Pension and Other Postretirement Benefits Cost (Reversal of Cost), Total
Employee benefit plans
Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Schedule of Unit Contingent Capacity
Schedule of Unit Contingent Capacity [Table Text Block]
[Table Text Block] for Schedule of Unit Contingent Capacity [Table]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Other assets, non-current
Other Assets, Noncurrent
Total equity
Beginning balance
Ending balance
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Entity Address, Address Line One
Entity Address, Address Line One
Regulatory Assets [Domain]
Regulatory Asset [Domain]
Defined Benefit Plan, Plan Assets, Category [Axis]
Defined Benefit Plan, Plan Assets, Category [Axis]
Derivative Instruments, Gain (Loss)
Derivative Instruments, Gain (Loss) [Table Text Block]
Debt, Weighted Average Interest Rate
Weighted average interest rates
Operations and maintenance
Operating Expense, Maintenance, Operations, and Other Costs and Expense
Amount of operating expenses for the period including selling, general, and administrative expenses, costs include routine repairs and maintenance and operations.
Noncontrolling Interest
Noncontrolling Interest [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral, Total
Derivative Asset, Fair Value, Amount Not Offset Against Collateral
Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral
Defined Benefit Plan Assumptions Used In Calculating Net Periodic Benefit Cost Expected Rate of Return On Assets For Next Fiscal Year
Defined Benefit Plan Assumptions Used In Calculating Net Periodic Benefit Cost Expected Rate of Return On Assets For Next Fiscal Year
An assumption for the next fiscal year as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation
Transaction Type [Axis]
Transaction Type [Axis]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax
Supplemental cash flow information:
Supplemental Cash Flow Information [Abstract]
Iowa Utilities Board (IUB)
Iowa Utilities Board (IUB) [Member]
Iowa Utilities Board (IUB)
Regulatory Agency [Domain]
Regulatory Agency [Domain]
Natural gas physical contracts, net
Natural Gas Physical Purchases [Member]
Natural Gas Physical Purchases [Member]
Income tax expense (benefit)
Income tax benefit (expense)
Income Tax Expense (Benefit)
Total Current and Deferred
Income Tax Expense (Benefit)
Defined Benefit Plan, Accumulated Benefit Obligation
Defined Benefit Plan, Accumulated Benefit Obligation
Defined Contribution Plan, 401K
Defined Contribution Plan, 401K [Member]
The 401K defined contribution plan, which requires a contribution from the employee in order to receive a matching contribution (within limits) from the employer [Member]
Income Taxes
Income Tax Disclosure [Text Block]
Settlement Reached with the Regulatory Agency
Settlement Reached with the Regulatory Agency [Member]
Settlement Reached with the Regulatory Agency
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Other (none of which is individually significant)
Other Accrued Liabilities, Current
Property, plant and equipment additions
Payments to Acquire Property, Plant, and Equipment, Total
Payments to Acquire Property, Plant, and Equipment
Discount Rate
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Line of Credit Facility [Table]
Fair Value Measurements
Derivatives and Fair Value [Text Block]
Arkansas Public Service Commission (APSC)
Arkansas Public Service Commission (APSC) [Member]
Arkansas Public Service Commission (APSC)
Public Utilities, General Disclosures [Line Items]
Public Utilities, General Disclosures [Line Items]
Issuance of common stock (in shares)
Stock Issued During Period, Shares, New Issues
Summary of ATM Activity
Summary of At-the-Marke Activity [Table Text Block]
Summary of at-the-marke activity.
Deferred energy and gas costs
Deferred energy and fuel cost adjustments
Deferred Fuel Costs [Member]
Carrying Amount
Reported Value Measurement [Member]
Black Hills Energy, Arkansas
Black Hills Energy, Arkansas [Member]
Black Hills Energy, Arkansas
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Net amortization of prior service cost
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Northern Lowa Windpower Assets
Northern Iowa Windpower Assets [Member]
Northern lowa windpower assets.
Auditor Name
Auditor Name
At the market equity offering program average price per share.
At The Market Equity Offering Program Average Price Per Share
Average price per share
(Tax) benefit on benefit plan liability adjustments - prior service costs
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Tax
Black Hills Energy - Wyoming Gas
Black Hills Energy Wyoming Gas [Member]
Black Hills Energy Wyoming Gas.
Operating income
Operating income (loss)
Operating Income (Loss)
Debt Instrument, Interest Rate, Stated Percentage
Stated interest rate (percent)
Regulatory liabilities
Regulatory liabilities
Regulatory Liability
Regulatory assets, non-current
Regulatory Asset, Noncurrent
Colorado Public Utilities Commission (CPUC)
Colorado Public Utilities Commission (CPUC) [Member]
Colorado Public Utilities Commission (CPUC) [Member]
Entity Filer Category
Entity Filer Category
Reconciliation of Assets from Segment to Consolidated [Table]
Reconciliation of Assets from Segment to Consolidated [Table]
Deferred credits and other liabilities:
Liabilities, Noncurrent [Abstract]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]
Regulatory Asset [Axis]
Regulatory Asset [Axis]
Other regulatory liabilities
Other Regulatory Liabilities [Member]
Other regulatory liabilities [Member]
Total operating expenses
Operating Expenses
Entity Current Reporting Status
Entity Current Reporting Status
Kansas Corporation Commission (KCC)
Kansas Corporation Commission (KCC) [Member]
Kansas Corporation Commission (KCC)
Total materials, supplies and fuel
Materials, supplies and fuel
Inventory, Net
Deferred taxes on AFUDC
Allowance For Funds Used During Construction [Member]
The offsetting entry to other income when an enterprise capitalizes, as part of the cost of plant and equipment, the cost of financing construction as financed partially by equity.
Number of Megawatts Capacity Purchased
Number of Megawatts Capacity Purchased
Number of Megawatts Capacity Purchased
Restricted Cash and Investments, Current, Total
Restricted cash and equivalents
Restricted Cash and Investments, Current
Environmental
Environmental [Member]
Environmental costs associated with utility property [Member]
Total stockholders’ equity
Stockholders' Equity Attributable to Parent, Beginning Balance
Stockholders' Equity Attributable to Parent, Ending Balance
Stockholders' Equity Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Rate Review Filed with the Regulatory Agency
Rate Review Filed with the Regulatory Agency [Member]
Rate Review Filed with the Regulatory Agency [Member]
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent [Member]
Entity Tax Identification Number
Entity Tax Identification Number
Income Statement Location [Axis]
Income Statement Location [Axis]
Common stock $1 par value; 100,000,000 shares authorized; issued 67,115,403 and 66,140,396 shares, respectively
Common Stock, Value, Issued
Consolidation Items [Axis]
Consolidation Items [Axis]
Retained Earnings (Accumulated Deficit), Total
Retained earnings
Retained Earnings (Accumulated Deficit)
Cumulative Effect, Period of Adoption [Domain]
Cumulative Effect, Period of Adoption [Domain]
Equity Components [Axis]
Equity Components [Axis]
Derivative, Gain (Loss) on Derivative, Net, Total
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net
Black Hills Service Company
Black Hills Service Company [Member]
Black Hills Service Company [Member]
Total deferred credits and other liabilities
Liabilities, Other than Long-Term Debt, Noncurrent
Derivative Instrument, Gain Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]
Error Correction, Type [Domain]
Error Correction, Type [Domain]
Regulatory liabilities, non-current
Regulatory Liability, Noncurrent
Capital Addition Requirements by the FERC Joint-Access Transmission Tariff
Capital Addition Requirements by the FERC Joint-Access Transmission Tariff
Capital Addition Requirements by the FERC Joint-Access Transmission Tariff
Black Hills Energy - Arkansas Gas
Black Hills Energy, Arkansas Gas [Member]
Black Hills Energy, Arkansas Gas
2025
Defined Benefit Plan, Expected Future Benefit Payment, Year Three
Entity Emerging Growth Company
Entity Emerging Growth Company
Operating expenses:
Operating Expenses [Abstract]
Interest cost
Defined Benefit Plan, Interest Cost
Natural gas in storage
Energy Related Inventory, Natural Gas in Storage
Defined Benefit Plans
Retirement Plan Type [Domain]
Senior unsecured notes due 2028.
Senior Unsecured Notes Due 2028 [Member]
Senior Unsecured Notes Due 2028
Accounts Receivable and Allowance for Doubtful Accounts
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Account Receivable Schedule
Reclassification adjustments of benefit plan liability - prior service cost (net of tax of $--, $8, $-- and $14, respectively)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax
Defined Benefit Plan, Plan Assets, Category [Domain]
Defined Benefit Plan, Plan Assets, Category [Domain]
Public Utilities, Regulatory Proceeding [Domain]
Public Utilities, Regulatory Proceeding [Domain]
Transaction [Domain]
Transaction [Domain]
Interest Rate Swap and Commodity Derivative
Interest Rate Swap and Commodity Derivative [Member]
Interest Rate Swap and Commodity Derivative
Service Cost
Defined Benefit Plan, Service Cost
Accounts payable and other current liabilities
Increase (Decrease) in Other Accounts Payable and Accrued Liabilities
Retirement Benefits [Abstract]
Document Transition Report
Document Transition Report
Assets, Fair Value Disclosure, Total
Derivative Assets, Total
Assets, Fair Value Disclosure
Total other income (expense)
Nonoperating Income (Expense)
Public utilities, requested debt capital structure, percentage
Public Utilities, Requested Debt Capital Structure, Percentage
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Transmission/Other
Transmission/Other [Member]
Transmission/Other [Member]
Postretirement Health Coverage
Postretirement Health Coverage [Member]
Depreciation, Depletion and Amortization, Total
Depreciation, depletion and amortization
Depreciation, Depletion and Amortization
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Accumulated Other Comprehensive Income (Loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accounts receivable, net
Accounts Receivable, after Allowance for Credit Loss, Current
Accounts Receivable, after Allowance for Credit Loss, Current, Total
Account Receivable, net
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year
Estimated Future Employer Contributions in Next Fiscal Year
Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity
Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Table Text Block]
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Energy [Domain]
Energy [Domain]
Other comprehensive income, net of tax
Other comprehensive income (loss), net of tax
Other Comprehensive Income (Loss), Net of Tax
Commodity derivatives
Commodity Contract
Commodity Contract [Member]
Weighted Average Cost of Capital
Weighted Average Cost of Capital
Weighted average cost of capital
Long-term Purchase Commitment
Long-Term Purchase Commitment [Table Text Block]
Net income available for common stock
Net income available for common stock
Net Income (Loss) Attributable to Parent
Gas price derivatives
Price Risk Derivative [Member]
Long-term Purchase Commitment [Line Items]
Long-Term Purchase Commitment [Line Items]
Common Collective Trust - Equity
Common Collective Trust, Equity Fund
Common Collective Trust, Equity Fund [Member]
Common Collective Trust, Equity Fund [Member]
Long
Long [Member]
Electric Utilities
Electric Utilities [Member]
Electric Utilities Segment [Member]
Deferred gas cost adjustments
Asset Recoverable Gas Costs [Member]
Schedule of Fair Value Hierarchy, Measured on Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset, Total
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset
Additional Paid-in Capital
Additional Paid-in Capital [Member]
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration]
Loss on reacquired debt
Bond Issuance Costs [Member]
Utility Bond Issuance Costs recoverable over the life of the original issue, or if refinanced, over the life of the new issue[Member]
Income tax disclosure.
Income Tax Disclosure [Line Items]
Entity Registrant Name
Entity Registrant Name
Liabilities, Fair Value Disclosure, Total
Derivative Liabilities, Total
Liabilities, Fair Value Disclosure
Accounts Receivable, Allowance for Credit Loss, Current
Less: Allowance for Credit Losses
Balance at Beginning of Year
Balance at End of Year
Less: Allowance for Credit Losses
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value, Total
Cash and Cash Equivalents, at Carrying Value
Public Utilities, Requested Rate Increase (Decrease), Amount
Public Utilities, Requested Rate Increase (Decrease), Amount
Earnings Per Share [Text Block]
Earnings Per Share
Revenues, Total
Revenue
Revenues
Share-Based Payment Arrangement, Noncash Expense, Total
Stock compensation
Share-Based Payment Arrangement, Noncash Expense
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Total property, plant and equipment, net
Property, plant and equipment of variable interest entities, net
Property, Plant and Equipment, Net
Statement [Line Items]
Statement [Line Items]
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture, Total
Share-based compensation
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture
Title of 12(b) Security
Title of 12(b) Security
Income tax reconciliation due to sale of assets
Income Tax Reconciliation Deductions From Sale Of Assets
Income tax reconciliation deductions from sale of assets.
Nebraska Publc Service Commission (NPSC)
Nebraska Publc Service Commission (NPSC) [Member]
Nebraska Publc Service Commission (NPSC)
Non-controlling interest
Noncontrolling Interest in Variable Interest Entity
Common Stock
Common Stock [Member]
Operating activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Equity Component [Domain]
Equity Component [Domain]
Nebraska
NEBRASKA
Revenue from contracts with customers
Revenue from Contract with Customer, Excluding Assessed Tax
Income before income taxes
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
Entity Address, State or Province
Entity Address, State or Province
Total other assets, non-current
Assets, Noncurrent, Other than Noncurrent Investments and Property, Plant and Equipment
Geographical [Axis]
Public Utilities, Regulatory Proceeding [Axis]
Public Utilities, Regulatory Proceeding [Axis]
Regulatory Liability [Domain]
Regulatory Liability [Domain]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Document Type
Document Type
Interest (net of amounts capitalized)
Interest Paid, Excluding Capitalized Interest, Operating Activities
Defined Benefit Plan, Amortization of Gain (Loss)
Recognized net actuarial loss (gain)
Entity Shell Company
Entity Shell Company
Materials, supplies and fuel
Increase (Decrease) in Inventories, Total
Increase (Decrease) in Inventories
Segment Reporting Information
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion
Trend Year
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table]
Fair Value, Recurring and Nonrecurring [Table]
Other assets, non-current
Derivative Assets, Noncurrent
Derivative Assets, Noncurrent [Member]
Line item in the statement of financial position in a classified presentation in which the fair value amounts of the derivative instruments are included.
Reclassification out of Accumulated Other Comprehensive Income [Table]
Reclassification out of Accumulated Other Comprehensive Income [Table]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Security Exchange Name
Security Exchange Name
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net Cash Provided by (Used in) Operating Activities
Net cash provided by operating activities
Natural gas futures purchased
Future [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]
Regulatory liabilities, current
Regulatory liabilities, current
Regulatory Liability, Current
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Services transferred at a point in time
Transferred at Point in Time [Member]
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Natural Gas, Distribution
Natural Gas, Distribution [Member]
Natural Gas for distribution [Member]
Accrued interest
Interest Payable, Current
Gas supply contract termination
Gas Supply Contract Termination [Member]
Gas Supply Contract Termination [Member]
Discount rate
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate
Schedule of Defined Benefit Plans Contributions
Schedule of Defined Benefit Plans Contributions [Table Text Block]
Schedule of Defined Benefit Plans Contributions for the current year and specific future years.
Audit Information [Abstract]
Audit Information [Abstract]
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of Defined Benefit Plans Disclosures [Table]
Beginning balance (in shares)
Ending balance (in shares)
Common Stock, Shares, Outstanding
Rate Review Approved by Regulatory Agency
Rate Review Approved by Regulatory Agency [Member]
Rate Review Approved by Regulatory Agency
Financing
Debt Disclosure [Text Block]
Fair Value, Inputs, Level 2
Fair Value, Inputs, Level 2 [Member]
Proceeds from Issuance of Long-Term Debt, Total
Long-term debt - issuance
Proceeds from Issuance of Long-Term Debt
Natural Gas
Natural Gas [Member]
Investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Black Hills Energy - Rocky Mountain Natural Gas
Black Hills Energy, Rocky Mountain Natural Gas
Black Hills Energy, Rocky Mountain Natural Gas [Member]
Selected Balance Sheet Information [Abstract]
Selected Balance Sheet Information [Abstract]
Selected Balance Sheet Information [Abstract]
Commitments, contingencies and guarantees (Note 3)
Commitments and Contingencies
Public utilities amount of system safety and integrity rider moved to base rates and termination of the system safety and integrity rider.
Public Utilities Amount of System Safety and Integrity Rider Moved to Base Rates and Termination of the System Safety and Integrity Rider
Public Utilities Amount of System Safety and Integrity Rider Moved to Base Rates and Termination of the System Safety and Integrity Rider
Common stock, shares, issued
Common Stock, Shares, Issued
Risk Management And Derivatives
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Supplemental Non-Qualified Defined Benefit Plans
Supplemental Employee Retirement Plan
Supplemental Employee Retirement Plan [Member]
Regulatory Matters
Schedule of Regulatory Assets and Liabilities [Text Block]
Minimum
Minimum [Member]
Hedging Designation [Axis]
Hedging Designation [Axis]
Public Utilities Number Of Former Riders Replaced With A New Comprehensive Safety And Integrity Rider
Public utilities, number of former riders replaced with a new comprehensive safety and integrity rider.
Derivative liabilities, current
Derivative Liabilities, Current [Member]
Line item in the statement of financial position in a classified presentation in which the fair value amounts of the derivative instruments are included.
Other revenues
Other [Member]
Other [Member]
Netting Contract by Category [Axis]
Netting Contract, Category [Axis]
Netting Contract by Category [Axis]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reporting Segment [Domain]
Segments [Domain]
Segments [Domain]
Accrued liabilities
Total accrued liabilities
Accrued Liabilities, Current
Equity:
Stockholders' Equity Attributable to Parent [Abstract]
Deferred taxes on flow through accounting
Flow Through Accounting [Member]
The income tax effects of certain tax items are reflected in cost of service for the customer in which the tax benefits are realized and result in lower utiity rates. The regulatory treatment under flow-through accounting was applied for this tax benefit generated by utility costs that were previously capitalized for tax purposes in a rate case settlement and resulted in a lower rate increase. A regulatory asset was established to reflect the future increase in taxes payable recovered from sutomers as the temporarty difference reverses.[Member]
Treasury Stock
Treasury Stock [Member]
At the market equity offering program authorized aggregate value
At The Market Equity Offering Program authorized an aggregate value that the Company may, through its sales agents, offer and sell from time to time shares of its common stock.
At The Market Equity Offering Program Authorized Aggregate Value
Segments [Axis]
Segments [Axis]
Revenue:
Revenues [Abstract]
Debt instrument consolidated indebtedness to capitalization ratio requirement.
Debt Instrument Consolidated Indebtedness To Capitalization Ratio Requirement
Consolidated Indebtedness to Capitalization Ratio
Regulatory assets
Regulatory assets
Increase (Decrease) in Other Regulatory Assets
South Dakota Electric
Black Hills Energy - South Dakota Electric
South Dakota Electric [Member]
South Dakota Electric
Other adjustments, net
Other Noncash Income (Expense), Total
Other Noncash Income (Expense)
Subsequent Event
Subsequent Event [Member]
Defined Contribution Plan
Retirement Plan Name [Domain]
Other income (expense), net
Other Nonoperating Income (Expense), Total
Other Nonoperating Income (Expense)
Cost of removal
Removal Costs [Member]
Less current maturities
Long-Term Debt, Current Maturities, Total
Current maturities of long-term debt
2023
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Cost
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
2024
Defined Benefit Plan, Expected Future Benefit Payment, Year Two
Commitments, Contingencies and Guarantees
Commitments Contingencies and Guarantees [Text Block]
Other income (expense):
Nonoperating Income (Expense) [Abstract]
Payment for Pension and Other Postretirement Benefits
Payment for Other Postretirement Benefits
Regulatory Agency [Axis]
Regulatory Agency [Axis]
Cash
Cash and Cash Equivalents [Member]
Entity Central Index Key
Entity Central Index Key
Defined Benefit Plan, Fair Value of Plan Assets, Excluding Net Asset Value investments
Defined Benefit Plan, Fair Value of Plan Assets, Excluding Net Asset Value investments
Defined Benefit Plan, Fair Value of Plan Assets, Excluding Net Asset Value investments
Customer [Axis]
Customer [Axis]
Other
Stockholders' Equity, Other
Less accumulated depreciation and depletion
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Position [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Retail - Electric , Natural Gas and Coal
Retail - Electric , Natural Gas and Coal [Member]
Retail - Electric , Natural Gas and Coal
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Dilutive effect of:
Dilutive Securities, Effect on Basic Earnings Per Share [Abstract]
Unrecorded Unconditional Purchase Obligations Disclosure
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]
Consolidation Items [Domain]
Consolidation Items [Domain]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset, Total
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset
Public Utilities, Term Extension of System Safety and Integrity Rider
Public Utilities, Term Extension of System Safety and Integrity Rider
Public Utilities, Term Extension of System Safety and Integrity Rider
Amortization of Debt Issuance Costs and Discounts, Total
Deferred financing cost amortization
Amortization of Debt Issuance Costs and Discounts
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]
Inventory, Raw Materials and Supplies, Gross, Total
Materials and supplies
Inventory, Raw Materials and Supplies, Gross
Debt Issuance Costs, Net, Total
Debt Issuance Costs, Net
Less unamortized deferred financing costs
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net income to net cash provided by operating activities:
Retained Earnings
Retained Earnings [Member]
Write-offs and Other Deductions
Accounts Receivable, Allowance for Credit Loss, Writeoff
Available borrowing capacity.
Available Borrowing Capacity
Available capacity
Recovery of incremental costs
Regulatory assets
Regulatory assets
Regulatory Asset
Customer [Domain]
Customer [Domain]
Designated as Hedging Instrument
Designated as Hedging Instrument [Member]
Effective Income Tax Rate Reconciliation, Percent, Total
Effective Income Tax Rate Reconciliation, Percent
Effective Tax Rate
Settlement agreement reached with APSC Staff and various intervenors
A P S C Authorized Member
A P S C Aauthorized.
Property, plant and equipment
Property, Plant and Equipment, Gross, Total
Total gross property, plant and equipment
Property, Plant and Equipment, Gross, Beginning Balance
Property, Plant and Equipment, Gross, Ending Balance
Property, Plant and Equipment, Gross
Income Tax Disclosure [Table]
Income tax disclosure.
Financing Receivable, Current, Allowance for Credit Loss
Financing Receivable, Current, Allowance for Credit Loss [Table Text Block]
Financing Receivable, Current, Allowance for Credit Loss
Derivative assets, current
Derivative Assets, Current [Member]
Line item in the statement of financial position in a classified presentation in which the fair value amounts of the derivative instruments are included.
Additional Paid in Capital, Total
Additional paid-in capital
Additional Paid in Capital
Entity Interactive Data Current
Entity Interactive Data Current
Letters of Credit Outstanding, Amount
Letters of Credit
Inter-segment Revenues
Intersegment Eliminations [Member]
Black Hills Energy - Colorado Gas
Black Hills Energy, Colorado Gas [Member]
Black Hills Energy, Colorado Gas [Member]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Expected long-term rate of return on assets
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets
Reclassification adjustments of benefit plan liability - net loss (net of tax of $(27), $(68), $(43) and $(113), respectively)
Reclassification adjustments of benefit plan liability - net loss (net of tax of $(27), $(68), $(43) and $(113), respectively)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax
Percentage Of Monthly Redemption
Percentage Of Monthly Redemption
Percentage of shares that may be redeemed at the end of each month.
Interest expense incurred net of amounts capitalized
Interest Costs Incurred, Total
Interest expense
Interest Costs Incurred
Additions Charged to Costs and Expenses
Accounts Receivable, Credit Loss Expense (Reversal)
Issuance costs
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs
Public Utilities - Length of Electric Transmission Lines to Receive Infrastructure Investments
Public Utilities - Length of Electric Transmission Lines to Receive Infrastructure Investments
Public Utilities - Length of Electric Transmission Lines to Receive Infrastructure Investments
Deferred energy and gas costs
Deferred Energy and Gas Costs Member
Deferred energy and gas costs.
Local Phone Number
Local Phone Number
Federal Statutory Rate
U.S. federal corporate tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Public utilities, requested equity capital structure, percentage
Public Utilities, Requested Equity Capital Structure, Percentage
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule of Earnings Per Share Reconciliation
Debt Covenants [Abstract]
Debt Disclosure [Abstract]
Net income attributable to non-controlling interest
Less: comprehensive income attributable to non-controlling interest
Net Income (Loss) Attributable to Noncontrolling Interest, Total
Net Income (Loss) Attributable to Noncontrolling Interest
Netting Contract by Category [Domain]
Netting Contract, Category [Domain]
[Domain] for Netting Contract by Category [Axis]
Interest rate swaps
Interest Rate Swap
Interest Rate Swap [Member]
Disaggregation of Revenue
Disaggregation of Revenue [Table Text Block]
Annual Revenue Requirement, as Required by the FERC Joint-Access Transmission Tariff
Annual Revenue Requirement, as Required by the FERC Joint-Access Transmission Tariff
Annual Revenue Requirement, as Required by the FERC Joint-Access Transmission Tariff
Category of Item Purchased [Axis]
Category of Item Purchased [Axis]
Other deferred credits and other liabilities
Other Liabilities, Noncurrent
2027
Defined Benefit Plan, Expected Future Benefit Payment, Year Five
Net borrowings (payments) of Revolving Credit Facility and CP Program
Net (payments) borrowings of Revolving Credit Facility and Commercial Paper Program
Net (payments) borrowings of Revolving Credit Facility and Commercial Paper Program
Derivative Liability, Statement of Financial Position [Extensible Enumeration]
(Tax) benefit on net unrealized gains (losses) on commodity derivatives
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), Adjustments, Tax
Income Statement Location [Domain]
Income Statement Location [Domain]
Other assets:
Other Assets, Noncurrent [Abstract]
Natural gas options purchased, net
Commodity Option [Member]
Customer deposits and prepayments
Customer Deposits and Prepayments
Accrued Liabilities - Customer Deposits and Prepayments
Total
Long-Term Debt, Total
Long-term Debt
Long-Term Debt
Liability, Defined Benefit Plan, Noncurrent, Total
Benefit plan liabilities
Liability, Defined Benefit Plan, Noncurrent
Document Fiscal Year Focus
Document Fiscal Year Focus
Intangible Assets, Net (Excluding Goodwill), Total
Intangible assets, net
Intangible assets, net, beginning balance
Intangible assets, net, ending balance
Intangible Assets, Net (Excluding Goodwill)
Earnings Per Share, Basic, Total
Earnings per share, Basic (usd per share)
Earnings Per Share, Basic
Dividends on common stock
Dividends, Common Stock, Cash
ASSETS
Assets [Abstract]
Timing of Transfer of Good or Service [Domain]
Timing of Transfer of Good or Service [Domain]
Treasury stock, at cost - 48,623 and 36,726 shares, respectively
Treasury Stock, Value, Total
Treasury Stock, Value
Equity Compensation
Share-Based Payment Arrangement [Member]
LIABILITIES AND EQUITY
Liabilities and Equity [Abstract]
Position [Domain]
Income taxes
Income Taxes Paid, Net, Total
Income Taxes Paid, Net
Public Utilities, Approved Debt Capital Structure, Percentage
Public Utilities, Approved Debt Capital Structure, Percentage
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Net income
Net income
Net income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Segment Reporting Information, Additional Information [Abstract]
Segment Reporting Information, Additional Information [Abstract]
Current assets:
Assets, Current [Abstract]
Taxes, Miscellaneous, Total
Taxes - property and production
Taxes, Miscellaneous
Other comprehensive income (loss), before reclassifications
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Business Segment Information
Segment Reporting Disclosure [Text Block]
Public Utilities, Approved Equity Capital Structure, Percentage
Public Utilities, Approved Equity Capital Structure, Percentage
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy and NAV [Domain]
Black Hills Corporation
Black Hills Corporation [Member]
Black Hills Corporation [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount
Defined Contribution Plan, Employer Discretionary Contribution Amount
Measurement Frequency [Domain]
Measurement Frequency [Domain]
Contract or notional amounts and terms of marketing activities and derivative commodity instruments
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Change in certain operating assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Nebraska Public Service Commission (NPSC)
Nebraska Public Service Commission (NPSC) [Member]
Nebraska Public Service Commission (NPSC) [Member]
Post-65 for next year - All Plans
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year
Entity [Domain]
Entity [Domain]
August 4, 2020 ATM Program
August Four Twenty Twenty ATM Program [Member]
August 4, 2020 ATM program.
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total
Income before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Payment for Pension Benefits
Employer contributions
Defined Benefit Plan, Plan Assets, Contributions by Employer
Cover [Abstract]
Product and Service [Domain]
Product and Service [Domain]
Services transferred over time
Transferred over Time [Member]
Measurement Basis [Axis]
Measurement Basis [Axis]
Excess deferred income taxes
Deferred Income Tax Amortization [Member]
Rate Action of a regulator resulting in return of prior period income tax over collections
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year
Estimated Future Employer Contributions in Current Fiscal Year
Current liabilities:
Liabilities, Current [Abstract]
Maximum
Maximum [Member]
Storm Costs
Storm Costs [Member]
Retirement Plan Name [Axis]
Retirement Plan Name [Axis]
Wyoming Public Service Commission
Wyoming Public Service Commission [Member]
Wyoming Public Service Commission
Net cash (used in) investing activities
Net Cash Provided by (Used in) Investing Activities
Natural gas over-the-counter swaps, net
Fixed for Float Swaps Purchased [Member]
Fixed for Float Swaps Purchased [Member]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Long-term Purchase Commitment [Table]
Long-Term Purchase Commitment [Table]
Materials, Supplies and Fuel
Schedule of Inventory, Current [Table Text Block]
Power purchased
Power Purchased [Member]
Power Purchased [Member]
Fair Value, Inputs, Level 3
Fair Value, Inputs, Level 3 [Member]
Employee benefit plans and related deferred taxes
Employee Benefit Plans And Related Deferred Taxes Assets [Member]
Employee Benefit Plans And Related Deferred Taxes Assets [Member]
Accumulated Defined Benefit Plans Adjustment
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Use of Estimates and Basis of Presentation
Use of Estimates, Policy [Policy Text Block]
Derivative Liability, Fair Value, Gross Liability
Derivative Liability, Fair Value, Gross Liability
Derivative Liability, Subject to Master Netting Arrangement, before Offset
Long-term Purchase Commitment, Period
Long-Term Purchase Commitment, Period
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]
Regulatory Asset, Amortization Period
Regulatory Asset, Amortization Period
Regulatory assets, current
Regulatory assets, current
Regulatory Asset, Current
Benefit from Relieved TCJA Related Liabilities
Benefit from Relieved TCJA Related Liabilities
Benefit from Relieved TCJA Related Liabilities
Common stock, shares authorized
Common Stock, Shares Authorized
Short-term Debt, Type [Domain]
Short-Term Debt, Type [Domain]
Post-65 Ultimate trend rate - Black Hills Corp
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate
Trading Symbol
Trading Symbol
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Interest Expense
Interest Expense [Member]
Schedule of Employer Contribution to Employee Benefit Plans
Schedule of Employer Contribution to Employee Benefit Plans [Table Text Block]
Schedule of Employer Contribution to Defined Benefit and Defined Contribution Plans [Table Text Block]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Settlement of Plan to Provide TCJA and State Tax Reform benefits to Customers Annually
Settlement of Plan to Provide TCJA and State Tax Reform benefits to Customers Annually
Settlement of Plan to Provide TCJA and State Tax Reform benefits to Customers Annually
Comprehensive income available for common stock
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion
Line of Credit Facility, Average Outstanding Amount
Average amount outstanding (based on daily outstanding balances)
Accounts Payable, Current, Total
Accounts payable
Accounts Payable, Current
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cash Flow Hedging
Cash Flow Hedging [Member]
Distributions to non-controlling interest
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders
Debt Instrument, Term
Common stock, par value (usd per share)
Common Stock, Par or Stated Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Fair Value
Fair Value
Estimate of Fair Value Measurement [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Long-Term Debt, Type [Domain]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Anti-dilutive shares (in shares)
Black Hills Energy - Nebraska Gas
Black Hills Energy - Nebraska Gas [Member]
Black Hills Energy - Nebraska Gas [Member]
Expected return on assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets