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Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2018
Segment Reporting [Abstract] |
Segment Financial Information | Financial information for each of FirstEnergy's reportable segments is presented in the tables below. Segment Financial Information
For the Three Months Ended |  | Regulated Distribution |  | Regulated Transmission |  | Corporate/ Other |  | Reconciling Adjustments |  | Consolidated
|  | (In millions)
September 30, 2018 |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 2,766 |  |  | $ | 346 |  |  | $ | 6 |  |  | $ | (54 | ) |  | $ | 3,064 |
Depreciation |  | 202 |  |  | 64 |  |  | 1 |  |  | 16 |  |  | 283 |
Amortization of regulatory assets, net |  | 65 |  |  | 2 |  |  | — |  |  | — |  |  | 67 |
Miscellaneous income (expense), net |  | 34 |  |  | 4 |  |  | 19 |  |  | (8 | ) |  | 49 |
Interest expense |  | 127 |  |  | 43 |  |  | 93 |  |  | (8 | ) |  | 255 |
Income taxes (benefits) |  | 126 |  |  | 34 |  |  | (27 | ) |  | — |  |  | 133 |
Income (loss) from continuing operations |  | 416 |  |  | 99 |  |  | (128 | ) |  | — |  |  | 387 |
Total assets |  | 28,530 |  |  | 10,017 |  |  | 896 |  |  | — |  |  | 39,443 |
Total goodwill |  | 5,004 |  |  | 614 |  |  | — |  |  | — |  |  | 5,618 |
Property additions |  | 356 |  |  | 262 |  |  | 5 |  |  | 12 |  |  | 635 |
September 30, 2017 |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 2,609 |  |  | $ | 341 |  |  | $ | 10 |  |  | $ | (50 | ) |  | $ | 2,910 |
Depreciation |  | 183 |  |  | 59 |  |  | 2 |  |  | 17 |  |  | 261 |
Amortization of regulatory assets, net |  | 107 |  |  | 6 |  |  | — |  |  | — |  |  | 113 |
Impairment of assets |  | — |  |  | 13 |  |  | — |  |  | — |  |  | 13 |
Miscellaneous income (expense), net |  | 16 |  |  | 1 |  |  | 15 |  |  | (13 | ) |  | 19 |
Interest expense |  | 133 |  |  | 38 |  |  | 104 |  |  | (13 | ) |  | 262 |
Income taxes (benefits) |  | 183 |  |  | 49 |  |  | (30 | ) |  | — |  |  | 202 |
Income (loss) from continuing operations |  | 314 |  |  | 84 |  |  | (97 | ) |  | — |  |  | 301 |
Total assets |  | 27,866 |  |  | 9,356 |  |  | 938 |  |  | 5,489 |  |  | 43,649 |
Total goodwill |  | 5,004 |  |  | 614 |  |  | — |  |  | — |  |  | 5,618 |
Property additions |  | 286 |  |  | 248 |  |  | 14 |  |  | 45 |  |  | 593 |
For the Nine Months Ended |  |  |  |  |  |  |  |  |  |
September 30, 2018 |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 7,694 |  |  | $ | 1,010 |  |  | $ | 28 |  |  | $ | (181 | ) |  | $ | 8,551 |
Depreciation |  | 598 |  |  | 187 |  |  | 6 |  |  | 52 |  |  | 843 |
Amortization (deferral) of regulatory assets, net |  | (194 | ) |  | 6 |  |  | — |  |  | — |  |  | (188 | )
Miscellaneous income (expense), net |  | 146 |  |  | 11 |  |  | 34 |  |  | (27 | ) |  | 164 |
Interest expense |  | 384 |  |  | 124 |  |  | 377 |  |  | (27 | ) |  | 858 |
Income taxes |  | 357 |  |  | 104 |  |  | 42 |  |  | — |  |  | 503 |
Income (loss) from continuing operations |  | 1,115 |  |  | 302 |  |  | (577 | ) |  | — |  |  | 840 |
Property additions |  | 1,011 |  |  | 836 |  |  | 68 |  |  | 27 |  |  | 1,942 |
September 30, 2017 |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 7,380 |  |  | $ | 981 |  |  | $ | 37 |  |  | $ | (151 | ) |  | $ | 8,247 |
Depreciation |  | 540 |  |  | 164 |  |  | 9 |  |  | 52 |  |  | 765 |
Amortization of regulatory assets, net |  | 263 |  |  | 11 |  |  | — |  |  | — |  |  | 274 |
Impairment of assets |  | — |  |  | 13 |  |  | — |  |  | — |  |  | 13 |
Miscellaneous income (expense), net |  | 45 |  |  | 1 |  |  | 31 |  |  | (33 | ) |  | 44 |
Interest expense |  | 405 |  |  | 116 |  |  | 263 |  |  | (33 | ) |  | 751 |
Income taxes (benefits) |  | 442 |  |  | 154 |  |  | (113 | ) |  | — |  |  | 483 |
Income (loss) from continuing operations |  | 756 |  |  | 264 |  |  | (248 | ) |  | — |  |  | 772 |
Property additions |  | 854 |  |  | 717 |  |  | 43 |  |  | 233 |  |  | 1,847 |

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