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Selected Balance Sheet Information | 9 Months Ended
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Sep. 30, 2025
Selected Balance Sheet Information [Abstract] |
Selected Balance Sheet Information | (13) Selected Balan ce Sheet Information Accounts Receivable and Allowance for Credit Losses 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 |
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 |
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 |

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- Definition Selected Balance Sheet Information [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/210/tableOfContent + Details
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