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REGULATORY MATTERS - Distribution Rate Orders (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Jan. 01, 2021
CEI |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 51.00% |
Allowed Equity | 49.00% |
Approved ROE | 10.50% |
ME |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 48.80% |
Allowed Equity | 51.20% |
MP |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 54.00% |
Allowed Equity | 46.00% |
JCP&L |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 48.60% |
Allowed Equity | 51.40% |
Approved ROE | 9.60% |
Regulatory liabilities |  | $ 86
OE |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 51.00% |
Allowed Equity | 49.00% |
Approved ROE | 10.50% |
Penn | West Virginia |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 54.00% |
Allowed Equity | 46.00% |
Penn | Maryland |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 47.00% |
Allowed Equity | 53.00% |
Approved ROE | 9.65% |
PN |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 47.40% |
Allowed Equity | 52.60% |
Penn |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 49.90% |
Allowed Equity | 50.10% |
TE |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 51.00% |
Allowed Equity | 49.00% |
Approved ROE | 10.50% |
WP |  |
Public Utilities, General Disclosures [Line Items] |  |
Allowed debt | 49.70% |
Allowed Equity | 50.30% |

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