v3.25.2
Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables)
 9 Months Ended
Jun. 30, 2025
Regulated Operations [Abstract]  
Schedule of Regulatory Assets The following regulatory assets and liabilities associated with Utilities are included on the Condensed Consolidated Balance Sheets:
June 30,
2025		September 30,
2024		June 30,
2024
Regulatory assets (a):
Income taxes recoverable$111 $105 $91 
Underfunded pension plans102 106 109 
Environmental costs27 28 28 
Deferred fuel and power costs15 — — 
Removal costs, net29 28 26 
Other35 52 57 
Total regulatory assets$319 $319 $311 
Regulatory liabilities (a):
Postretirement benefits$12 $13 $11 
Deferred fuel and power refunds10 17 33 
State income tax benefits — distribution system repairs45 44 44 
Excess federal deferred income taxes243 247 248 
Other13 8 5 
Total regulatory liabilities$323 $329 $341 
(a)Current regulatory assets are included in “Prepaid expenses and other current assets” and regulatory liabilities are included in “Other current liabilities” and “Other noncurrent liabilities” on the Condensed Consolidated Balance Sheets.
Schedule of Regulatory Liabilities The following regulatory assets and liabilities associated with Utilities are included on the Condensed Consolidated Balance Sheets:
June 30,
2025		September 30,
2024		June 30,
2024
Regulatory assets (a):
Income taxes recoverable$111 $105 $91 
Underfunded pension plans102 106 109 
Environmental costs27 28 28 
Deferred fuel and power costs15 — — 
Removal costs, net29 28 26 
Other35 52 57 
Total regulatory assets$319 $319 $311 
Regulatory liabilities (a):
Postretirement benefits$12 $13 $11 
Deferred fuel and power refunds10 17 33 
State income tax benefits — distribution system repairs45 44 44 
Excess federal deferred income taxes243 247 248 
Other13 8 5 
Total regulatory liabilities$323 $329 $341 
(a)Current regulatory assets are included in “Prepaid expenses and other current assets” and regulatory liabilities are included in “Other current liabilities” and “Other noncurrent liabilities” on the Condensed Consolidated Balance Sheets.