v3.25.1
Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables)
 6 Months Ended
Mar. 31, 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:
March 31,
2025		September 30,
2024		March 31,
2024
Regulatory assets (a):
Income taxes recoverable$109 $105 $93 
Underfunded pension plans104 106 109 
Environmental costs25 28 32 
Deferred fuel and power costs4 — — 
Removal costs, net29 28 23 
Other41 52 55 
Total regulatory assets$312 $319 $312 
Regulatory liabilities (a):
Postretirement benefits$12 $13 $11 
Deferred fuel and power refunds37 17 34 
State income tax benefits — distribution system repairs45 44 44 
Excess federal deferred income taxes246 247 250 
Other16 8 8 
Total regulatory liabilities$356 $329 $347 
(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:
March 31,
2025		September 30,
2024		March 31,
2024
Regulatory assets (a):
Income taxes recoverable$109 $105 $93 
Underfunded pension plans104 106 109 
Environmental costs25 28 32 
Deferred fuel and power costs4 — — 
Removal costs, net29 28 23 
Other41 52 55 
Total regulatory assets$312 $319 $312 
Regulatory liabilities (a):
Postretirement benefits$12 $13 $11 
Deferred fuel and power refunds37 17 34 
State income tax benefits — distribution system repairs45 44 44 
Excess federal deferred income taxes246 247 250 
Other16 8 8 
Total regulatory liabilities$356 $329 $347 
(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.