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REVENUE - Schedule of Receivables from Customers (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	$ 1,624	$ 1,585
Less: Uncollectible Reserve	50	55
Receivable	1,574	1,530
JERSEY CENTRAL POWER & LIGHT COMPANY
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	262	284
Less: Uncollectible Reserve	5	6
Receivable	257	278
Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	1,024	867
Billed | JERSEY CENTRAL POWER & LIGHT COMPANY
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	163	166
Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	600	718
Unbilled | JERSEY CENTRAL POWER & LIGHT COMPANY
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	$ 99	$ 118

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