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REVENUE - Schedule of Receivables from Customers (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	$ 1,647	$ 1,585
Less: Uncollectible Reserve	50	55
Receivables	1,597	1,530
JERSEY CENTRAL POWER & LIGHT COMPANY
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	332	284
Less: Uncollectible Reserve	5	6
Receivables	327	278
Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	848	867
Billed | JERSEY CENTRAL POWER & LIGHT COMPANY
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	161	166
Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	799	718
Unbilled | JERSEY CENTRAL POWER & LIGHT COMPANY
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	$ 171	$ 118

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