XML 81 R66.htm IDEA: XBRL DOCUMENT v3.5.0.2

Commitments, Guarantees and Contingencies (Details) $ in Millions	Sep. 30, 2016 USD ($)
Guarantor Obligations [Line Items]
Guarantor obligations	$ 499
At Current Credit Rating
Guarantor Obligations [Line Items]
Guarantor obligations	81
Upon Further Downgrade
Guarantor Obligations [Line Items]
Guarantor obligations	48
Upon Material Adverse Event
Guarantor Obligations [Line Items]
Guarantor obligations	10
Surety Bond (Collateralized Amount)
Guarantor Obligations [Line Items]
Guarantor obligations	360
CES
Guarantor Obligations [Line Items]
Guarantor obligations	355
CES | At Current Credit Rating
Guarantor Obligations [Line Items]
Guarantor obligations	81
CES | Upon Further Downgrade
Guarantor Obligations [Line Items]
Guarantor obligations	0
CES | Upon Material Adverse Event
Guarantor Obligations [Line Items]
Guarantor obligations	10
CES | Surety Bond (Collateralized Amount)
Guarantor Obligations [Line Items]
Guarantor obligations	264
Regulated
Guarantor Obligations [Line Items]
Guarantor obligations	144
Regulated | At Current Credit Rating
Guarantor Obligations [Line Items]
Guarantor obligations	0
Regulated | Upon Further Downgrade
Guarantor Obligations [Line Items]
Guarantor obligations	48
Regulated | Upon Material Adverse Event
Guarantor Obligations [Line Items]
Guarantor obligations	0
Regulated | Surety Bond (Collateralized Amount)
Guarantor Obligations [Line Items]
Guarantor obligations	$ 96

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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6851643&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_GuaranteeObligationsByNatureAxis=fe_AtCurrentCreditRatingMember
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=fe_UponMaterialAdverseEventMember
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:

X

- Details

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

X

- Details

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