SHORT-TERM BORROWINGS AND BANK LINES OF CREDIT	12 Months Ended
SHORT-TERM BORROWINGS AND BANK LINES OF CREDIT	Dec. 31, 2021
Debt Disclosure [Abstract]
SHORT-TERM BORROWINGS AND BANK LINES OF CREDIT	SHORT-TERM BORROWINGS AND BANK LINES OF CREDIT FirstEnergy had no outstanding short-term borrowings as of December 31, 2021 and $2.2 billion of outstanding short-term borrowings as of December 31, 2020. On November 23, 2020, JCP&L, ME, Penn, TE and WP, borrowed $950 million in the aggregate under the former FE Revolving Facility, bringing the outstanding principal balance to $1.2 billion, with $1.3 billion of remaining availability. On November 23, 2020, FET and ATSI borrowed $1 billion in the aggregate under the former FET Revolving Facility, bringing the outstanding principal balance to $1 billion, with no remaining availability. FE, FET and certain of their respective subsidiaries increased their borrowings under the former Revolving Facilities as a proactive measure to increase their respective cash positions and preserve financial flexibility. These borrowings were repaid in full during 2021. On October 18, 2021, FE, FET, the Utilities, and the Transmission Companies entered into the 2021 Credit Facilities, which were six separate senior unsecured five-year syndicated revolving credit facilities with JPMorgan Chase Bank, N.A., Mizuho Bank, Ltd. and PNC Bank, National Association that replaced the FE Revolving Facility and the FET Revolving Facility, and provide for aggregate commitments of $4.5 billion. The 2021 Credit Facilities are available until October 18, 2026, as follows: •FE and FET, $1.0 billion revolving credit facility; •Ohio Companies, $800 million revolving credit facility; •Pennsylvania Companies, $950 million revolving credit facility; •JCP&L, $500 million revolving credit facility; •MP and PE, $400 million revolving credit facility; and •Transmission Companies, $850 million revolving credit facility. Under the 2021 Credit Facilities, an aggregate amount of $4.5 billion is available to be borrowed, repaid and reborrowed, subject to each borrower's respective sublimit under the respective facilities. These new credit facilities provide substantial liquidity to support the Regulated Distribution and Regulated Transmission businesses, and each of the operating companies within the businesses. As of December 31, 2021, available liquidity under the 2021 Credit Facilities was $4.5 billion. Borrowings under the 2021 Credit Facilities may be used for working capital and other general corporate purposes. Generally, borrowings under each of the credit facilities are available to each borrower separately and mature on the earlier of 364 days from the date of borrowing or the commitment termination date, as the same may be extended. Each of the 2021 Credit Facilities contain financial covenants requiring each borrower, with the exception of FE, to maintain a consolidated debt-to-total-capitalization ratio (as defined under each of the 2021 Credit Facilities) of no more than 65%, and 75% for FET, measured at the end of each fiscal quarter. FE is required under its 2021 Credit Facility to maintain a consolidated interest coverage ratio of not less than 2.50 times, measured at the end of each fiscal quarter for the last four fiscal quarters beginning with the quarter ending December 31, 2021. Subject to each borrower's sublimit, the amounts noted below are available for the issuance of LOCs (subject to borrowings drawn under the 2021 Credit Facilities) expiring up to one year from the date of issuance. The stated amount of outstanding LOCs will count against total commitments available under each of the 2021 Credit Facilities and against the applicable borrower's borrowing sublimit. As of December 31, 2021, FirstEnergy had $4 million in outstanding LOCs. The 2021 Credit Facilities do not contain provisions that restrict the ability to borrow or accelerate payment of outstanding advances in the event of any change in credit ratings of the borrowers. Pricing is defined in “pricing grids,” whereby the cost of funds borrowed under the 2021 Credit Facilities are related to the credit ratings of the company borrowing the funds. Additionally, borrowings under each of the 2021 Credit Facilities are subject to the usual and customary provisions for acceleration upon the occurrence of events of default, including a cross-default for other indebtedness in excess of $100 million. As of December 31, 2021, the borrowers were in compliance with the applicable interest coverage and debt-to-total-capitalization ratio covenants in each case as defined under the respective 2021 Credit Facilities. FirstEnergy Money Pools FirstEnergy’s utility operating subsidiary companies also have the ability to borrow from each other and FE to meet their short-term working capital requirements. Similar but separate arrangements exist among FirstEnergy’s unregulated companies with AE Supply, FE, FET, FEV and certain other unregulated subsidiaries. FESC administers these money pools and tracks surplus funds of FE and the respective regulated and unregulated subsidiaries, as the case may be, as well as proceeds available from bank borrowings. Companies receiving a loan under the money pool agreements must repay the principal amount of the loan, together with accrued interest, within 364 days of borrowing the funds. The rate of interest is the same for each company receiving a loan from their respective pool and is based on the average cost of funds available through the pool. The average interest rate for borrowings in 2021 was 1.01% per annum for the regulated companies’ money pool and 0.60% per annum for the unregulated companies’ money pool. Weighted Average Interest Rates The annual weighted average interest rates on short-term borrowings outstanding as of December 31, 2021 and 2020, were 2.42% and 1.86%, respectively.