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Regulatory Matters (Tables) | 12 Months Ended
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Sep. 30, 2024
Regulatory Assets and Liabilities, Other Disclosure [Abstract] |
Schedule of Regulatory Assets and Liabilities | The Company has recorded the following regulatory assets and liabilities:
| At September 30
| 2024 |  | 2023
| (Thousands)
Regulatory Assets: |  |  |
Pension Costs(1) (Note K) | $ | 30,259 |  |  | $ | 20,459 |
Post-Retirement Benefit Costs(1) (Note K) | 7,932 |  |  | 2,536 |
Recoverable Future Taxes (Note G) | 80,084 |  |  | 69,045 |
System Modernization / Improvement Tracker (2) (See Regulatory Mechanisms in Note A) | 47,043 |  |  | 30,375 |
Asset Retirement Obligations(1) (Note E) | 21,951 |  |  | 19,384 |
Unamortized Debt Expense (Note A) | 5,604 |  |  | 7,240 |
Other(3) | 39,101 |  |  | 35,757 |
Total Regulatory Assets | 231,974 |  |  | 184,796 |
Less: Amounts Included in Other Current Assets | (38,264) |  |  | (36,373) |
Total Long-Term Regulatory Assets | $ | 193,710 |  |  | $ | 148,423 |
| At September 30
| 2024 |  | 2023
| (Thousands)
Regulatory Liabilities: |  |  |
Cost of Removal Regulatory Liability | $ | 292,477 |  |  | $ | 277,694 |
Taxes Refundable to Customers (Note G) | 305,645 |  |  | 268,562 |
Post-Retirement Benefit Costs(5) (Note K) | 141,199 |  |  | 159,760 |
Amounts Payable to Customers (See Regulatory Mechanisms in Note A) | 42,720 |  |  | 59,019 |
Environmental Site Remediation Costs(4) (Note L) | 5,390 |  |  | 619 |
Other(6) | 34,215 |  |  | 43,167 |
Total Regulatory Liabilities | 821,646 |  |  | 808,821 |
Less: Amounts included in Current and Accrued Liabilities | (72,072) |  |  | (97,124) |
Total Long-Term Regulatory Liabilities | $ | 749,574 |  |  | $ | 711,697 |
(1)Included in Other Regulatory Assets on the Consolidated Balance Sheets. (2)$15,681 and $19,584 are included in Other Current Assets on the Consolidated Balance Sheets at September 30, 2024 and 2023, respectively, since such amounts are expected to be recovered from ratepayers in the next 12 months. $31,362 and $10,791 are included in Other Regulatory Assets on the Consolidated Balance Sheets at September 30, 2024 and 2023, respectively. (3)$22,583 and $16,789 are included in Other Current Assets on the Consolidated Balance Sheets at September 30, 2024 and 2023, respectively, since such amounts are expected to be recovered from ratepayers in the next 12 months. $16,518 and $18,968 are included in Other Regulatory Assets on the Consolidated Balance Sheets at September 30, 2024 and 2023, respectively. (4)Included in Other Regulatory Liabilities on the Consolidated Balance Sheets. (5)$5,800 is included in Other Accruals and Current Liabilities on the Consolidated Balance Sheets at both September 30, 2024 and 2023, since such amounts are expected to be passed back to ratepayers in the next 12 months. $135,399 and $153,960 are included in Other Regulatory Liabilities on the Consolidated Balance Sheets at September 30, 2024 and 2023, respectively. (6)$23,552 and $32,305 are included in Other Accruals and Current Liabilities on the Consolidated Balance Sheets at September 30, 2024 and 2023, respectively, since such amounts are expected to be passed back to ratepayers in the next 12 months. $10,663 and $10,862 are included in Other Regulatory Liabilities on the Consolidated Balance Sheets at September 30, 2024 and 2023, respectively.

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- Definition Detailed information about assets created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet and detailed information about liabilities that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. + References No definition available. + Details
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- References No definition available. + Details
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