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Short-Term Borrowings and Bank Lines of Credit (Tables) | 12 Months Ended
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Dec. 31, 2016
Short-term Debt [Line Items] |
Liquidity | FirstEnergy’s available liquidity from external sources as of January 31, 2017 was as follows:
Borrower(s) |  | Type |  | Maturity |  | Commitment |  | Available Liquidity
|  |  |  |  |  | (In millions)
FirstEnergy(1) |  | Revolving |  | December 2021 |  | $ | 4,000 |  |  | $ | 1,341 |
FET(2) |  | Revolving |  | December 2021 |  | 1,000 |  |  | 1,000 |
|  |  |  | Subtotal |  | $ | 5,000 |  |  | $ | 2,341 |
|  |  |  | Cash |  | — |  |  | 308 |
|  |  |  | Total |  | $ | 5,000 |  |  | $ | 2,649 |
(1) | FE and the Utilities.
(2) | Includes FET, ATSI and TrAIL
Borrowing sub-limits for each borrower and limitations on short-term indebtedness | The following table summarizes the borrowing sub-limits for each borrower under the facilities, the limitations on short-term indebtedness applicable to each borrower under current regulatory approvals and applicable statutory and/or charter limitations, as of December 31, 2016:
Borrower |  | Revolving Credit Facility Sub-Limits |  | Regulatory and Other Short-Term Debt Limitations |
|  | (In millions) |
FE |  |  | $ | 4,000 |  |  |  | $ | — |  | (1)
FET |  |  | 1,000 |  |  |  | — |  | (1)
OE |  |  | 500 |  |  |  | 500 |  | (2)
CEI |  |  | 500 |  |  |  | 500 |  | (2)
TE |  |  | 500 |  |  |  | 500 |  | (2)
JCP&L |  |  | 600 |  |  |  | 500 |  | (2)
ME |  |  | 300 |  |  |  | 500 |  | (2)
PN |  |  | 300 |  |  |  | 300 |  | (2)
WP |  |  | 200 |  |  |  | 200 |  | (2)
MP |  |  | 500 |  |  |  | 500 |  | (2)
PE |  |  | 150 |  |  |  | 150 |  | (2)
ATSI |  |  | 500 |  |  |  | 500 |  | (2)
Penn |  |  | 50 |  |  |  | 100 |  | (2)
TrAIL |  |  | 400 |  |  |  | 400 |  | (2)
MAIT |  |  | 400 |  |  |  | 400 |  | (2)(3)
(1) | No limitations.
(2) | Excluding amounts which may be borrowed under the regulated companies' money pool.
Weighted average interest rates on short-term borrowings outstanding | The weighted average interest rates on short-term borrowings outstanding, including borrowings under the FirstEnergy Money Pools, as of December 31, 2016 and 2015, were as follows:
|  | 2016 |  | 2015
FirstEnergy |  | 2.47 | % |  | 2.16 | %
FES |
Short-term Debt [Line Items] |
Liquidity | FES had $101 million (payable to AE Supply) and $8 million of short-term borrowings as of December 31, 2016 and 2015, respectively. FES' available liquidity as of January 31, 2017 was as follows:
Type |  | Commitment |  | Available Liquidity
|  | (In millions)
Two-year secured credit facility with FE |  | $ | 500 |  |  | $ | 500 |
Cash |  | — |  |  | 2 |
|  | $ | 500 |  |  | $ | 502 |

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