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COMMITMENTS, GUARANTEES AND CONTINGENCIES - Potential Collateral Obligations (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)
Guarantor Obligations [Line Items]
Guarantor obligations	$ 259
Percent of face amount of debt	100.00%
Curing period	30 days
Upon further downgrade
Guarantor Obligations [Line Items]
Guarantor obligations	$ 83
Surety Bond (Collateralized Amount)
Guarantor Obligations [Line Items]
Guarantor obligations	$ 176
Percent of face amount of debt	60.00%
Capped portion of surety bond obligations	$ 39
FE
Guarantor Obligations [Line Items]
Guarantor obligations	80
FE | Upon further downgrade
Guarantor Obligations [Line Items]
Guarantor obligations	1
FE | Surety Bond (Collateralized Amount)
Guarantor Obligations [Line Items]
Guarantor obligations	79
Electric Companies and Transmission Companies
Guarantor Obligations [Line Items]
Guarantor obligations	179
Electric Companies and Transmission Companies | Upon further downgrade
Guarantor Obligations [Line Items]
Guarantor obligations	82
Electric Companies and Transmission Companies | Surety Bond (Collateralized Amount)
Guarantor Obligations [Line Items]
Guarantor obligations	$ 97

X

- Definition

Guarantor Obligations, Capped Portion of Surety Bond Obligations

+ References

No definition available.

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- Definition

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+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ 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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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: 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

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