COMMITMENTS, GUARANTEES AND CONTINGENCIES - Schedule of Potential Collateral Obligations (Details) $ in Millions	3 Months Ended
Mar. 31, 2025 USD ($)
Guarantor Obligations [Line Items]
Percent of face amount of debt	100.00%
Curing period	30 days
JERSEY CENTRAL POWER & LIGHT COMPANY
Guarantor Obligations [Line Items]
Percent of face amount of debt	100.00%
Curing period	30 days
Credit Rating Contractual Obligations
Guarantor Obligations [Line Items]
Potential Collateral Obligations	$ 367
Credit Rating Contractual Obligations \| JERSEY CENTRAL POWER & LIGHT COMPANY
Guarantor Obligations [Line Items]
Potential Collateral Obligations	58
Credit Rating Contractual Obligations \| FE
Guarantor Obligations [Line Items]
Potential Collateral Obligations	194
Credit Rating Contractual Obligations \| Electric Companies and Transmission Companies
Guarantor Obligations [Line Items]
Potential Collateral Obligations	173
Upon downgrade
Guarantor Obligations [Line Items]
Potential Collateral Obligations	72
Upon downgrade \| JERSEY CENTRAL POWER & LIGHT COMPANY
Guarantor Obligations [Line Items]
Potential Collateral Obligations	38
Upon downgrade \| FE
Guarantor Obligations [Line Items]
Potential Collateral Obligations	1
Upon downgrade \| Electric Companies and Transmission Companies
Guarantor Obligations [Line Items]
Potential Collateral Obligations	71
Surety Bond (Collateralized Amount)
Guarantor Obligations [Line Items]
Potential Collateral Obligations	$ 295
Percent of face amount of debt	60.00%
Capped portion of surety bond obligations	$ 38
Surety Bond (Collateralized Amount) \| JERSEY CENTRAL POWER & LIGHT COMPANY
Guarantor Obligations [Line Items]
Potential Collateral Obligations	$ 20
Percent of face amount of debt	60.00%
Capped portion of surety bond obligations	$ 1
Surety Bond (Collateralized Amount) \| FE
Guarantor Obligations [Line Items]
Potential Collateral Obligations	193
Surety Bond (Collateralized Amount) \| Electric Companies and Transmission Companies
Guarantor Obligations [Line Items]
Potential Collateral Obligations	$ 102

Guarantor Obligations, Capped Portion of Surety Bond Obligations

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+ References

No definition available.

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+ References

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- Definition

Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

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