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Asset Retirement Obligations (Tables)
3 Months Ended
Dec. 31, 2022
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligation Activity
Asset Retirement Obligation Activity
 NuclearNon-NuclearTotal
Balance at September 30, 2022
$3,643 $3,519 $7,162 (1)
Settlements— (68)(68)(2)
Revisions in estimate (1)
Accretion (recorded as regulatory asset)41 18 59 
Balance at December 31, 2022$3,687 $3,468 $7,155 (1)
Notes
(1) Includes $287 million and $275 million at December 31, 2022, and September 30, 2022, respectively, in Current liabilities.
(2) Settlements include the change in asset retirement obligation project accruals included in Accounts payable and accrued liabilities of ($57) million.