XML 46 R37.htm IDEA: XBRL DOCUMENT
v3.25.3

Selected Balance Sheet Information (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Selected Balance Sheet Information [Abstract] |
Account Receivable Schedule | Following is a summary of Accounts receivable, net included in the accompanying Consolidated Balance Sheets as of:
| September 30, 2025 |  | December 31, 2024 |
| (in millions) |
Billed Accounts Receivable | $ | 173.7 |  | $ | 201.5 |
Unbilled Revenue |  | 79.8 |  |  | 151.8 |
Less: Allowance for Credit Losses |  | (2.1 | ) |  | (2.1 | )
Account Receivable, net | $ | 251.4 |  | $ | 351.2 |
Financing Receivable, Current, Allowance for Credit Loss | Changes to allowance for credit losses for the nine months ended September 30, 2025 and 2024, respectively, were as follows:
| Balance at Beginning of Year |  | Additions Charged to Costs and Expenses |  | Recoveries and Other Additions |  | Write-offs and Other Deductions |  | Balance at September 30, |
| (in millions) |
2025 | $ | 2.1 |  | $ | 5.8 |  | $ | 2.4 |  | $ | (8.2 | ) | $ | 2.1 |
2024 | $ | 2.2 |  | $ | 4.0 |  | $ | 2.8 |  | $ | (7.6 | ) | $ | 1.4 |
Materials, Supplies and Fuel | The following amounts by major classification are included in Materials, supplies, and fuel on the accompanying Consolidated Balance Sheets as of:
| September 30, 2025 |  | December 31, 2024 |
| (in millions) |
Materials and supplies | $ | 114.1 |  | $ | 106.1 |
Fuel - Electric Utilities |  | 6.7 |  |  | 7.5 |
Natural gas in storage |  | 52.2 |  |  | 40.3 |
Total materials, supplies, and fuel | $ | 173.0 |  | $ | 153.9 |
Schedule of Accrued Liabilities | The following amounts by major classification are included in Accrued liabilities on the accompanying Consolidated Balance Sheets as of:
| September 30, 2025 |  | December 31, 2024 |
| (in millions) |
Accrued employee compensation, benefits, and withholdings | $ | 84.1 |  | $ | 85.5 |
Accrued property taxes |  | 53.7 |  |  | 54.7 |
Customer deposits and prepayments |  | 62.6 |  |  | 55.6 |
Accrued interest |  | 56.0 |  |  | 56.4 |
Other (none of which is individually significant) |  | 36.0 |  |  | 50.0 |
Total accrued liabilities | $ | 292.4 |  | $ | 302.2 |

X
- Definition Selected Balance Sheet Information [Abstract] + References No definition available. + Details
Name: | bkh_SelectedBalanceSheetInformationAbstract
Namespace Prefix: | bkh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of allowance for credit loss of financing receivable, classified as current. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_ScheduleOfCreditLossesForFinancingReceivablesCurrentTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483489/210-10-50-1 + Details
Name: | us-gaap_ScheduleOfInventoryCurrentTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration