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Commitments, Guarantees and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Guarantor Obligations | The following table discloses the potential additional credit rating contingent contractual collateral obligations as of December 31, 2016:
Potential Additional Collateral Obligations |  | FES |  | AE Supply |  | Regulated |  | Total
|  | (In millions)
Contractual Obligations for Additional Collateral |  |  |  |  |  |  |  |
At Current Credit Rating |  | $ | 7 |  |  | $ | 3 |  |  | $ | — |  |  | $ | 10 |
Upon Further Downgrade |  | — |  |  | — |  |  | 48 |  |  | 48 |
Surety Bonds (Collateralized Amount)(1) |  | 240 |  |  | 25 |  |  | 102 |  |  | 367 |
Total Exposure from Contractual Obligations |  | $ | 247 |  |  | $ | 28 |  |  | $ | 150 |  |  | $ | 425 |
(1) Effective January 2017, FE is a guarantor for $169 million of FG surety bonds for the benefit of the PA DEP with respect to LBR.

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- Definition Tabular disclosure of each guarantee obligation, or each group of similar guarantee obligations, including (a) the nature of the guarantee, including its term, how it arose, and the events or circumstances that would require the guarantor to perform under the guarantee; (b) the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee; (c) the current carrying amount of the liability, if any, for the guarantor's obligations under the guarantee; and (d) the nature of any recourse provisions under the guarantee, and any assets held either as collateral or by third parties, and any relevant related party disclosure. Excludes disclosures about product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12265-110248 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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