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ASSET RETIREMENT OBLIGATIONS (Tables)
6 Months Ended
Jun. 30, 2025
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Changes to the ARO Balances
The following table summarizes the changes to the ARO balances as of June 30, 2025, and December 31, 2024.
FirstEnergy JCP&L
(In millions)
Balance, January 1, 2024
$209 $
Changes in timing and amount of estimated cash flows131 — 
Liabilities incurred95 — 
Liabilities settled (4)— 
Accretion24 
Balance, December 31, 2024
455 
Liabilities incurred— 
Liabilities settled (1)
(152)— 
Accretion13 — 
Balance, June 30, 2025
$317 $
(1) FirstEnergy amounts include the transfer of the McElroy’s Run CCR impoundment facility as well as the adjacent dry landfill and related remediation obligations to a subsidiary of IDA Power, LLC.