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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2019
Regulated Operations [Abstract] |
Distribution Rate Orders |
Company |  | Rates Effective |  | Allowed Debt/Equity |  | Allowed ROE
CEI |  | May 2009 |  | 51% / 49% |  | 10.5%
ME(1) |  | January 2017 |  | 48.8% / 51.2% |  | Settled(2)
MP |  | February 2015 |  | 54% / 46% |  | Settled(2)
JCP&L |  | January 2017 |  | 55% / 45% |  | 9.6%
OE |  | January 2009 |  | 51% / 49% |  | 10.5%
PE (West Virginia) |  | February 2015 |  | 54% / 46% |  | Settled(2)
PE (Maryland) |  | March 2019 |  | 47% / 53% |  | 9.65%
PN(1) |  | January 2017 |  | 47.4% / 52.6% |  | Settled(2)
Penn(1) |  | January 2017 |  | 49.9% / 50.1% |  | Settled(2)
TE |  | January 2009 |  | 51% / 49% |  | 10.5%
WP(1) |  | January 2017 |  | 49.7% / 50.3% |  | Settled(2)
(1) Reflects filed debt/equity as final settlement/orders do not specifically include capital structure. (2) Commission-approved settlement agreements did not disclose ROE rates. The following table summarizes the key terms of rate orders in effect for transmission customer billings for FirstEnergy's transmission owner entities as of December 31, 2019:
Company |  | Rates Effective |  | Capital Structure |  | Allowed ROE
ATSI |  | January 1, 2015 |  | Actual (13 month average) |  | 10.38%
JCP&L |  | June 1, 2017(1) |  | Settled(1)(3) |  | Settled(1)(3)
MP |  | March 21, 2018(2) |  | Settled(3) |  | Settled(3)
PE |  | March 21, 2018(2) |  | Settled(3) |  | Settled(3)
WP |  | March 21, 2018(2) |  | Settled(3) |  | Settled(3)
MAIT |  | July 1, 2017 |  | Lower of Actual (13 month average) or 60% |  | 10.3%
TrAIL |  | July 1, 2008 |  | Actual (year-end) |  | 12.7% (TrAIL the Line & Black Oak SVC) 11.7% (All other projects)
(1) Effective on January 1, 2020, JCP&L has implemented a forward-looking formula rate, which has been accepted by FERC, subject to refund, pending further hearing and settlement proceedings. (2) See FERC Actions on Tax Act below. (3) FERC-approved settlement agreements did not specify.

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- Definition Tabular disclosure of regulation for public utility entities, including, but not limited to, rate requests, decommissioning costs and the amount of allowance for earnings on equity capitalized for rate making purposes. + References No definition available. + Details
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