XML 115 R98.htm IDEA: XBRL DOCUMENT v3.20.4

COMMITMENTS, GUARANTEES AND CONTINGENCIES - Schedule of Guarantor Obligations (Details) $ in Millions	Dec. 31, 2020 USD ($)
Guarantor Obligations [Line Items]
Potential additional collateral obligations	$ 350
Utilities and FET
Guarantor Obligations [Line Items]
Potential additional collateral obligations	92
FE
Guarantor Obligations [Line Items]
Potential additional collateral obligations	258
Upon Further Downgrade
Guarantor Obligations [Line Items]
Potential additional collateral obligations	37
Upon Further Downgrade | Utilities and FET
Guarantor Obligations [Line Items]
Potential additional collateral obligations	37
Upon Further Downgrade | FE
Guarantor Obligations [Line Items]
Potential additional collateral obligations	0
Surety Bond
Guarantor Obligations [Line Items]
Potential additional collateral obligations	313
Surety Bond | Utilities and FET
Guarantor Obligations [Line Items]
Potential additional collateral obligations	55
Surety Bond | FE
Guarantor Obligations [Line Items]
Potential additional collateral obligations	$ 258

X

- 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

No definition available.

+ Details

Name:	us-gaap_GuaranteeObligationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=fe_RegulatedDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=fe_UponFurtherDowngradeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_SuretyBondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: