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Supplemental Guarantor Information (Details 1) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | $ 199 | $ 131 | $ 85 | $ 218
Receivables- |  |  |  |
Customers | 1,440 | 1,415 |  |
Other Receivables | 175 | 180 |  |
Materials and supplies, at average cost | 564 | 785 |  |
Derivatives | 140 | 157 |  |
Collateral | 176 | 70 |  |
Prepayments and other | 158 | 167 |  |
Total current assets | 2,950 | 3,040 |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | 43,767 | 49,952 |  |
Less — Accumulated provision for depreciation | 15,731 | 15,160 |  |
Property, plant and equipment in service net of accumulated provision for depreciation | 28,036 | 34,792 |  |
Construction work in progress | 1,351 | 2,422 |  |
Total net property, plant and equipment | 29,387 | 37,214 |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 2,514 | 2,282 |  |
Other | 512 | 506 |  |
Total other property and investments | 3,026 | 2,788 |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Customer intangibles | 120 |  |  |
Goodwill | 5,618 | 6,418 | 6,418 |
Other | 1,153 | 1,286 |  |
Total deferred charges and other assets | 7,785 | 9,052 |  |
Total assets | 43,148 | 52,094 | 51,552 |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | 1,685 | 1,166 |  |
Short-term borrowings | 2,675 | 1,708 |  |
Accounts payable- |  |  |  |
Accrued taxes | 580 | 519 |  |
Derivatives | 78 | 106 |  |
Other | 660 | 642 |  |
Total current liabilities | 7,126 | 5,602 |  |
CAPITALIZATION: |  |  |  |
Total equity | 6,241 | 12,421 |  |
Long-term debt and other long-term obligations | 18,192 | 19,099 |  |
Total capitalization | 24,433 | 31,521 |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 757 | 791 |  |
Accumulated deferred income taxes | 3,765 | 6,773 |  |
Retirement benefits | 3,719 | 4,245 |  |
Asset retirement obligations | 1,482 | 1,410 |  |
Other | 1,704 | 1,555 |  |
Total noncurrent liabilities | 11,589 | 14,971 |  |
Total liabilities and capitalization | 43,148 | 52,094 |  |
Eliminations |  |  |  |
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Receivables- |  |  |  |
Customers | 0 | 0 |  |
Affiliated companies | (612) | (846) |  |
Other Receivables | 0 | 0 |  |
Notes receivable from affiliated companies | (3,351) | (2,410) |  |
Materials and supplies, at average cost | 0 | 0 |  |
Derivatives | 0 | 0 |  |
Collateral | 0 | 0 |  |
Prepayments and other | 0 | 0 |  |
Total current assets | (3,963) | (3,256) |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | (290) | (382) |  |
Less — Accumulated provision for depreciation | (187) | (194) |  |
Property, plant and equipment in service net of accumulated provision for depreciation | (103) | (188) |  |
Construction work in progress | 0 | 0 |  |
Total net property, plant and equipment | (103) | (188) |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 0 | 0 |  |
Investment in affiliated companies | (2,923) | (7,452) |  |
Other | 0 | 0 |  |
Total other property and investments | (2,923) | (7,452) |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Accumulated deferred income tax benefits | (270) | (316) |  |
Customer intangibles | 0 | 0 |  |
Goodwill |  | 0 |  |
Property taxes | 0 | 0 |  |
Derivatives | 0 | 0 |  |
Other | 21 | 12 |  |
Total deferred charges and other assets | (249) | (304) |  |
Total assets | (7,238) | (11,200) |  |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | (26) | (25) |  |
Short-term borrowings | 0 | 0 |  |
Accounts payable- |  |  |  |
Affiliated companies | (706) | (856) |  |
Other | 0 | 0 |  |
Accrued taxes | (16) | (86) |  |
Derivatives | 0 | 0 |  |
Other | 36 | 45 |  |
Total current liabilities | (4,063) | (3,332) |  |
CAPITALIZATION: |  |  |  |
Total equity | (2,834) | (7,420) |  |
Long-term debt and other long-term obligations | (1,091) | (1,136) |  |
Total capitalization | (3,925) | (8,556) |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 757 | 791 |  |
Accumulated deferred income taxes | (7) | (103) |  |
Retirement benefits | 0 | 0 |  |
Asset retirement obligations | 0 | 0 |  |
Derivatives | 0 | 0 |  |
Other | 0 | 0 |  |
Total noncurrent liabilities | 750 | 688 |  |
Total liabilities and capitalization | (7,238) | (11,200) |  |
Eliminations | Affiliates |  |  |  |
CURRENT LIABILITIES: |  |  |  |
Other Short-term Borrowings | (3,351) | (2,410) |  |
FES |  |  |  |
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Receivables- |  |  |  |
Customers | 213 | 275 |  |
Affiliated companies | 332 | 433 |  |
Other Receivables | 17 | 36 |  |
Notes receivable from affiliated companies | 501 | 406 |  |
Materials and supplies, at average cost | 45 | 53 |  |
Derivatives | 137 | 154 |  |
Collateral | 157 | 70 |  |
Prepayments and other | 38 | 48 |  |
Total current assets | 1,440 | 1,475 |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | 120 | 93 |  |
Less — Accumulated provision for depreciation | 52 | 40 |  |
Property, plant and equipment in service net of accumulated provision for depreciation | 68 | 53 |  |
Construction work in progress | 2 | 30 |  |
Total net property, plant and equipment | 70 | 83 |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 0 | 0 |  |
Investment in affiliated companies | 2,923 | 7,452 |  |
Other | 0 | 0 |  |
Total other property and investments | 2,923 | 7,452 |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Accumulated deferred income tax benefits | 395 | 300 |  |
Customer intangibles | 9 | 61 |  |
Goodwill |  | 23 |  |
Property taxes | 0 | 0 |  |
Derivatives | 77 | 79 |  |
Other | 24 | 29 |  |
Total deferred charges and other assets | 505 | 492 |  |
Total assets | 4,938 | 9,502 |  |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | 0 | 0 |  |
Short-term borrowings | 0 | 0 |  |
Accounts payable- |  |  |  |
Affiliated companies | 743 | 884 |  |
Other | 17 | 21 |  |
Accrued taxes | 50 | 7 |  |
Derivatives | 71 | 103 |  |
Other | 56 | 66 |  |
Total current liabilities | 3,906 | 3,102 |  |
CAPITALIZATION: |  |  |  |
Total equity | 218 | 5,605 |  |
Long-term debt and other long-term obligations | 691 | 690 |  |
Total capitalization | 909 | 6,295 |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 0 | 0 |  |
Accumulated deferred income taxes | 4 | 6 |  |
Retirement benefits | 25 | 27 |  |
Asset retirement obligations | 0 | 0 |  |
Derivatives | 52 | 37 |  |
Other | 42 | 35 |  |
Total noncurrent liabilities | 123 | 105 |  |
Total liabilities and capitalization | 4,938 | 9,502 |  |
FES | Affiliates |  |  |  |
CURRENT LIABILITIES: |  |  |  |
Other Short-term Borrowings | 2,969 | 2,021 |  |
FG |  |  |  |
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | 2 | 2 | 2 | 2
Receivables- |  |  |  |
Customers | 0 | 0 |  |
Affiliated companies | 315 | 403 |  |
Other Receivables | 2 | 4 |  |
Notes receivable from affiliated companies | 1,585 | 1,210 |  |
Materials and supplies, at average cost | 142 | 204 |  |
Derivatives | 0 | 0 |  |
Collateral | 0 | 0 |  |
Prepayments and other | 24 | 18 |  |
Total current assets | 2,070 | 1,841 |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | 2,524 | 6,367 |  |
Less — Accumulated provision for depreciation | 1,920 | 2,144 |  |
Property, plant and equipment in service net of accumulated provision for depreciation | 604 | 4,223 |  |
Construction work in progress | 67 | 249 |  |
Total net property, plant and equipment | 671 | 4,472 |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 0 | 0 |  |
Investment in affiliated companies | 0 | 0 |  |
Other | 9 | 10 |  |
Total other property and investments | 9 | 10 |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Accumulated deferred income tax benefits | 1,271 | 16 |  |
Customer intangibles | 0 | 0 |  |
Goodwill |  | 0 |  |
Property taxes | 12 | 12 |  |
Derivatives | 0 | 0 |  |
Other | 327 | 312 |  |
Total deferred charges and other assets | 1,610 | 340 |  |
Total assets | 4,360 | 6,663 |  |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | 200 | 229 |  |
Short-term borrowings | 0 | 8 |  |
Accounts payable- |  |  |  |
Affiliated companies | 107 | 146 |  |
Other | 93 | 118 |  |
Accrued taxes | 48 | 93 |  |
Derivatives | 6 | 1 |  |
Other | 54 | 61 |  |
Total current liabilities | 991 | 1,045 |  |
CAPITALIZATION: |  |  |  |
Total equity | 828 | 2,944 |  |
Long-term debt and other long-term obligations | 2,093 | 2,116 |  |
Total capitalization | 2,921 | 5,060 |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 0 | 0 |  |
Accumulated deferred income taxes | 3 | 0 |  |
Retirement benefits | 172 | 305 |  |
Asset retirement obligations | 188 | 191 |  |
Derivatives | 0 | 1 |  |
Other | 85 | 61 |  |
Total noncurrent liabilities | 448 | 558 |  |
Total liabilities and capitalization | 4,360 | 6,663 |  |
FG | Affiliates |  |  |  |
CURRENT LIABILITIES: |  |  |  |
Other Short-term Borrowings | 483 | 389 |  |
NG |  |  |  |
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Receivables- |  |  |  |
Customers | 0 | 0 |  |
Affiliated companies | 417 | 461 |  |
Other Receivables | 8 | 19 |  |
Notes receivable from affiliated companies | 1,294 | 805 |  |
Materials and supplies, at average cost | 80 | 213 |  |
Derivatives | 0 | 0 |  |
Collateral | 0 | 0 |  |
Prepayments and other | 1 | 0 |  |
Total current assets | 1,800 | 1,498 |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | 4,703 | 8,233 |  |
Less — Accumulated provision for depreciation | 4,144 | 3,775 |  |
Property, plant and equipment in service net of accumulated provision for depreciation | 559 | 4,458 |  |
Construction work in progress | 358 | 878 |  |
Total net property, plant and equipment | 917 | 5,336 |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 1,552 | 1,327 |  |
Investment in affiliated companies | 0 | 0 |  |
Other | 1 | 0 |  |
Total other property and investments | 1,553 | 1,327 |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Accumulated deferred income tax benefits | 883 | 0 |  |
Customer intangibles | 0 | 0 |  |
Goodwill |  | 0 |  |
Property taxes | 28 | 28 |  |
Derivatives | 0 | 0 |  |
Other | 0 | 14 |  |
Total deferred charges and other assets | 911 | 42 |  |
Total assets | 5,181 | 8,203 |  |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | 5 | 308 |  |
Short-term borrowings | 0 | 0 |  |
Accounts payable- |  |  |  |
Affiliated companies | 406 | 368 |  |
Other | 0 | 0 |  |
Accrued taxes | 61 | 62 |  |
Derivatives | 0 | 0 |  |
Other | 10 | 9 |  |
Total current liabilities | 482 | 747 |  |
CAPITALIZATION: |  |  |  |
Total equity | 2,006 | 4,476 |  |
Long-term debt and other long-term obligations | 1,120 | 840 |  |
Total capitalization | 3,126 | 5,316 |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 0 | 0 |  |
Accumulated deferred income taxes | 0 | 697 |  |
Retirement benefits | 0 | 0 |  |
Asset retirement obligations | 713 | 640 |  |
Derivatives | 0 | 0 |  |
Other | 860 | 803 |  |
Total noncurrent liabilities | 1,573 | 2,140 |  |
Total liabilities and capitalization | 5,181 | 8,203 |  |
NG | Affiliates |  |  |  |
CURRENT LIABILITIES: |  |  |  |
Other Short-term Borrowings | 0 | 0 |  |
FES |  |  |  |
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | 2 | 2 | $ 2 | $ 2
Receivables- |  |  |  |
Customers | 213 | 275 |  |
Affiliated companies | 452 | 451 |  |
Other Receivables | 27 | 59 |  |
Notes receivable from affiliated companies | 29 | 11 |  |
Materials and supplies, at average cost | 267 | 470 |  |
Derivatives | 137 | 154 |  |
Collateral | 157 | 70 |  |
Prepayments and other | 63 | 66 |  |
Total current assets | 1,347 | 1,558 |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | 7,057 | 14,311 |  |
Less — Accumulated provision for depreciation | 5,929 | 5,765 |  |
Property, plant and equipment in service net of accumulated provision for depreciation | 1,128 | 8,546 |  |
Construction work in progress | 427 | 1,157 |  |
Total net property, plant and equipment | 1,555 | 9,703 |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 1,552 | 1,327 |  |
Investment in affiliated companies | 0 | 0 |  |
Other | 10 | 10 |  |
Total other property and investments | 1,562 | 1,337 |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Accumulated deferred income tax benefits | 2,279 | 0 |  |
Customer intangibles | 9 | 61 |  |
Goodwill | 0 | 23 |  |
Property taxes | 40 | 40 |  |
Derivatives | 77 | 79 |  |
Other | 372 | 367 |  |
Total deferred charges and other assets | 2,777 | 570 |  |
Total assets | 7,241 | 13,168 |  |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | 179 | 512 |  |
Short-term borrowings | 0 | 8 |  |
Accounts payable- |  |  |  |
Affiliated companies | 550 | 542 |  |
Other | 110 | 139 |  |
Accrued taxes | 143 | 76 |  |
Derivatives | 77 | 104 |  |
Other | 156 | 181 |  |
Total current liabilities | 1,316 | 1,562 |  |
CAPITALIZATION: |  |  |  |
Total equity | 218 | 5,605 |  |
Long-term debt and other long-term obligations | 2,813 | 2,510 |  |
Total capitalization | 3,031 | 8,115 |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 757 | 791 |  |
Accumulated deferred income taxes | 0 | 600 |  |
Retirement benefits | 197 | 332 |  |
Asset retirement obligations | 901 | 831 |  |
Derivatives | 52 | 38 |  |
Other | 987 | 899 |  |
Total noncurrent liabilities | 2,894 | 3,491 |  |
Total liabilities and capitalization | 7,241 | 13,168 |  |
FES | Affiliates |  |  |  |
CURRENT LIABILITIES: |  |  |  |
Other Short-term Borrowings | $ 101 | $ 0 |  |

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