Asset Retirement Obligations Asset Retirement Obligations (Tables)

12 Months Ended

Sep. 30, 2025


Asset Retirement Obligation Activity (in millions)
	Nuclear		Non-Nuclear		Total
Balance at September 30, 2023	$	3,808	$	3,681	$	7,489
Settlements	(4)		(253)		(257)
Revisions in estimate (non-cash)	(160)		292		132
Additional obligations (non-cash)	—		3,136		3,136


Accretion (recorded as regulatory asset)	170		136		306

Balance at September 30, 2024	3,814		6,992		10,806		(1)

Settlements	(15)		(255)		(270)
Revisions in estimate (non-cash)	2		(563)		(561)



Accretion (recorded as regulatory asset)	175		264		439

Balance at September 30, 2025	$	3,976	$	6,438	$	10,414	(1)

Note

(1) Includes $313 million and $283 million at September 30, 2025 and 2024, respectively, in Current liabilities.