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CAPITALIZATION - Preferred and Preference Stock (Details) - $ / shares	Dec. 31, 2021	Jan. 31, 2018
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	5,000,000
Par Value (in dollars per share)	$ 100
Penn
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	1,200,000
Par Value (in dollars per share)	$ 100
CEI
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	4,000,000
JCP&L
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	15,600,000
ME
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	10,000,000
PN
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	11,435,000
PE
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	10,000,000
Par Value (in dollars per share)	$ 0.01
WP
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	32,000,000
Preferred Stock With Par Value $100 | OE
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	6,000,000
Par Value (in dollars per share)	$ 100
Preferred Stock With Par Value $100 | TE
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	3,000,000
Par Value (in dollars per share)	$ 100
Preferred Stock With Par Value $100 | MP
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	940,000
Par Value (in dollars per share)	$ 100
Preferred Stock With Par Value $25 | OE
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	8,000,000
Par Value (in dollars per share)	$ 25
Preferred Stock With Par Value $25 | TE
Preferred stock and preference stock authorizations
Shares Authorized (in shares)	12,000,000
Par Value (in dollars per share)	$ 25
Preference Stock | OE
Preferred stock and preference stock authorizations
Preference Shares Authorized (in shares)	8,000,000
Preference Stock | CEI
Preferred stock and preference stock authorizations
Preference Shares Authorized (in shares)	3,000,000
Preference Stock | TE
Preferred stock and preference stock authorizations
Preference Shares Authorized (in shares)	5,000,000
Preference Stock Par Value (in dollars per share)	$ 25
Series A Convertible Preferred Stock
Preferred stock and preference stock authorizations
Par Value (in dollars per share)		$ 100

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- Definition

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- Definition

Preferred stock and preference stock number of shares authorized and par value disclosures.

+ References

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644

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- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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