Asset Retirement Obligations

12 Months Ended

Dec. 31, 2025

Asset Retirement Obligation Disclosure [Abstract]

The Company's AROs are primarily related to the environmental obligations for mine reclamation, ash disposal, site closures, fuel storage facilities and future dismantlement of equipment on leased property. In addition, the Company has also identified conditional AROs for asbestos removal and disposal, which are specific to certain power generation operations.

The following table presents the balance of ARO obligations as of December 31, 2025 and 2024, along with the activity related to the Company's ARO obligations for the year ended December 31, 2025:


(In millions)	Total(a)
Balance as of December 31, 2024	$	409
Revisions in estimates for current obligations	(20)
Additions	18
Spending for current obligations	(47)
Accretion	25
Acquisitions	4
Balance as of December 31, 2025	$	389

(a)Total accretion expense related to asset retirement obligations included in the consolidated statement of cash flows includes accretion and revisions in estimates for asset retirement liabilities on non-operating plants