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Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables)
3 Months Ended
Dec. 31, 2023
Regulated Operations [Abstract]  
Schedule of Regulatory Assets The following regulatory assets and liabilities associated with Utilities are included on the Condensed Consolidated Balance Sheets:
December 31,
2023
September 30,
2023
December 31,
2022
Regulatory assets (a):
Income taxes recoverable$94 $94 $93 
Underfunded pension plans110 111 114 
Environmental costs26 28 36 
Deferred fuel and power costs17 27 71 
Removal costs, net23 23 25 
Other58 64 54 
Total regulatory assets$328 $347 $393 
Regulatory liabilities (a):
Postretirement benefit overcollections$11 $12 $11 
Deferred fuel and power refunds59 55 
State tax benefits — distribution system repairs43 43 39 
Excess federal deferred income taxes252 254 264 
Other
Total regulatory liabilities$367 $366 $320 
(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:
December 31,
2023
September 30,
2023
December 31,
2022
Regulatory assets (a):
Income taxes recoverable$94 $94 $93 
Underfunded pension plans110 111 114 
Environmental costs26 28 36 
Deferred fuel and power costs17 27 71 
Removal costs, net23 23 25 
Other58 64 54 
Total regulatory assets$328 $347 $393 
Regulatory liabilities (a):
Postretirement benefit overcollections$11 $12 $11 
Deferred fuel and power refunds59 55 
State tax benefits — distribution system repairs43 43 39 
Excess federal deferred income taxes252 254 264 
Other
Total regulatory liabilities$367 $366 $320 
(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.