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Supplemental Guarantor Information (Details 1) - USD ($) $ in Millions | Jun. 30, 2016 | Dec. 31, 2015 | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | $ 199 | $ 131 | $ 94 | $ 85
Receivables- |  |  |  |
Customers | 1,341 | 1,415 |  |
Other | 153 | 180 |  |
Materials and supplies | 759 | 785 |  |
Derivatives | 161 | 157 |  |
Collateral | 20 | 70 |  |
Prepayments and other | 163 | 167 |  |
Total current assets | 3,076 | 3,040 |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | 50,367 | 49,952 |  |
Less - Accumulated provision for depreciation | 15,295 | 15,160 |  |
Property, plant and equipment in service net of accumulated provision for depreciation | 35,072 | 34,792 |  |
Construction work in progress | 2,389 | 2,422 |  |
Total net property, plant and equipment | 37,461 | 37,214 |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 2,456 | 2,282 |  |
Other | 527 | 506 |  |
Total other property and investments | 2,983 | 2,788 |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Goodwill | 5,618 | 6,418 | 6,418 |
Other | 1,076 | 1,286 |  |
Total deferred charges and other assets | 7,881 | 9,052 |  |
Total assets | 51,401 | 52,094 | 52,171 |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | 1,327 | 1,166 |  |
Other | 2,925 | 1,708 |  |
Accounts payable- |  |  |  |
Accrued taxes | 439 | 519 |  |
Derivatives | 102 | 106 |  |
Other | 687 | 694 |  |
Total current liabilities | 6,759 | 5,602 |  |
CAPITALIZATION: |  |  |  |
Total common stockholders' equity | 11,407 | 12,421 |  |
Long-term debt and other long-term obligations | 18,348 | 19,099 |  |
Total capitalization | 29,755 | 31,521 |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 774 | 791 |  |
Accumulated deferred income taxes | 6,888 | 6,773 |  |
Retirement benefits | 4,177 | 4,245 |  |
Asset retirement obligations | 1,448 | 1,410 |  |
Other | 1,419 | 1,555 |  |
Total noncurrent liabilities | 14,887 | 14,971 |  |
Total liabilities and capitalization | 51,401 | 52,094 |  |
Eliminations |  |  |  |
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Receivables- |  |  |  |
Customers | 0 | 0 |  |
Affiliated companies | (531) | (846) |  |
Other | 0 | 0 |  |
Notes receivable from affiliated companies | (2,620) | (2,410) |  |
Materials and supplies | 0 | 0 |  |
Derivatives | 0 | 0 |  |
Collateral | 0 | 0 |  |
Prepayments and other | 0 | 0 |  |
Total current assets | (3,151) | (3,256) |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | (382) | (382) |  |
Less - Accumulated provision for depreciation | (195) | (194) |  |
Property, plant and equipment in service net of accumulated provision for depreciation | (187) | (188) |  |
Construction work in progress | 0 | 0 |  |
Total net property, plant and equipment | (187) | (188) |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 0 | 0 |  |
Investment in affiliated companies | (7,593) | (7,452) |  |
Other | 0 | 0 |  |
Total other property and investments | (7,593) | (7,452) |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Accumulated deferred income tax benefits | (381) | (316) |  |
Customer intangibles | 0 | 0 |  |
Goodwill |  | 0 |  |
Property taxes | 0 | 0 |  |
Derivatives | 0 | 0 |  |
Other | 19 | 12 |  |
Total deferred charges and other assets | (362) | (304) |  |
Total assets | (11,293) | (11,200) |  |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | (25) | (25) |  |
Other |  | 0 |  |
Accounts payable- |  |  |  |
Affiliated companies | (600) | (856) |  |
Other | 0 | 0 |  |
Accrued taxes | (26) | (86) |  |
Derivatives | 0 | 0 |  |
Other | 33 | 45 |  |
Total current liabilities | (3,238) | (3,332) |  |
CAPITALIZATION: |  |  |  |
Total common stockholders' equity | (7,558) | (7,420) |  |
Long-term debt and other long-term obligations | (1,106) | (1,136) |  |
Total capitalization | (8,664) | (8,556) |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 774 | 791 |  |
Accumulated deferred income taxes | (165) | (103) |  |
Retirement benefits | 0 | 0 |  |
Asset retirement obligations | 0 | 0 |  |
Derivatives | 0 | 0 |  |
Other | 0 | 0 |  |
Total noncurrent liabilities | 609 | 688 |  |
Total liabilities and capitalization | (11,293) | (11,200) |  |
Eliminations | Affiliates |  |  |  |
CURRENT LIABILITIES: |  |  |  |
Short-term borrowings | (2,620) | (2,410) |  |
FES |  |  |  |
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Receivables- |  |  |  |
Customers | 225 | 275 |  |
Affiliated companies | 333 | 433 |  |
Other | 28 | 36 |  |
Notes receivable from affiliated companies | 385 | 406 |  |
Materials and supplies | 48 | 53 |  |
Derivatives | 155 | 154 |  |
Collateral | 20 | 70 |  |
Prepayments and other | 64 | 48 |  |
Total current assets | 1,258 | 1,475 |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | 121 | 93 |  |
Less - Accumulated provision for depreciation | 46 | 40 |  |
Property, plant and equipment in service net of accumulated provision for depreciation | 75 | 53 |  |
Construction work in progress | 3 | 30 |  |
Total net property, plant and equipment | 78 | 83 |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 0 | 0 |  |
Investment in affiliated companies | 7,593 | 7,452 |  |
Other | 0 | 0 |  |
Total other property and investments | 7,593 | 7,452 |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Accumulated deferred income tax benefits | 254 | 300 |  |
Customer intangibles | 52 | 61 |  |
Goodwill |  | 23 |  |
Property taxes | 0 | 0 |  |
Derivatives | 83 | 79 |  |
Other | 22 | 29 |  |
Total deferred charges and other assets | 411 | 492 |  |
Total assets | 9,340 | 9,502 |  |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | 0 | 0 |  |
Other |  | 0 |  |
Accounts payable- |  |  |  |
Affiliated companies | 633 | 884 |  |
Other | 19 | 21 |  |
Accrued taxes | 11 | 7 |  |
Derivatives | 95 | 103 |  |
Other | 70 | 66 |  |
Total current liabilities | 3,172 | 3,102 |  |
CAPITALIZATION: |  |  |  |
Total common stockholders' equity | 5,357 | 5,605 |  |
Long-term debt and other long-term obligations | 692 | 690 |  |
Total capitalization | 6,049 | 6,295 |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 0 | 0 |  |
Accumulated deferred income taxes | 5 | 6 |  |
Retirement benefits | 27 | 27 |  |
Asset retirement obligations | 0 | 0 |  |
Derivatives | 40 | 37 |  |
Other | 47 | 35 |  |
Total noncurrent liabilities | 119 | 105 |  |
Total liabilities and capitalization | 9,340 | 9,502 |  |
FES | Affiliates |  |  |  |
CURRENT LIABILITIES: |  |  |  |
Short-term borrowings | 2,344 | 2,021 |  |
FGCO |  |  |  |
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | 2 | 2 | 2 | 2
Receivables- |  |  |  |
Customers | 0 | 0 |  |
Affiliated companies | 323 | 403 |  |
Other | 2 | 4 |  |
Notes receivable from affiliated companies | 1,467 | 1,210 |  |
Materials and supplies | 165 | 204 |  |
Derivatives | 0 | 0 |  |
Collateral | 0 | 0 |  |
Prepayments and other | 17 | 18 |  |
Total current assets | 1,976 | 1,841 |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | 5,665 | 6,367 |  |
Less - Accumulated provision for depreciation | 1,900 | 2,144 |  |
Property, plant and equipment in service net of accumulated provision for depreciation | 3,765 | 4,223 |  |
Construction work in progress | 269 | 249 |  |
Total net property, plant and equipment | 4,034 | 4,472 |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 0 | 0 |  |
Investment in affiliated companies | 0 | 0 |  |
Other | 10 | 10 |  |
Total other property and investments | 10 | 10 |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Accumulated deferred income tax benefits | 127 | 16 |  |
Customer intangibles | 0 | 0 |  |
Goodwill |  | 0 |  |
Property taxes | 6 | 12 |  |
Derivatives | 0 | 0 |  |
Other | 336 | 312 |  |
Total deferred charges and other assets | 469 | 340 |  |
Total assets | 6,489 | 6,663 |  |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | 396 | 229 |  |
Other |  | 8 |  |
Accounts payable- |  |  |  |
Affiliated companies | 172 | 146 |  |
Other | 95 | 118 |  |
Accrued taxes | 43 | 93 |  |
Derivatives | 4 | 1 |  |
Other | 61 | 61 |  |
Total current liabilities | 1,249 | 1,045 |  |
CAPITALIZATION: |  |  |  |
Total common stockholders' equity | 2,751 | 2,944 |  |
Long-term debt and other long-term obligations | 1,924 | 2,116 |  |
Total capitalization | 4,675 | 5,060 |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 0 | 0 |  |
Accumulated deferred income taxes | 0 | 0 |  |
Retirement benefits | 317 | 305 |  |
Asset retirement obligations | 188 | 191 |  |
Derivatives | 6 | 1 |  |
Other | 54 | 61 |  |
Total noncurrent liabilities | 565 | 558 |  |
Total liabilities and capitalization | 6,489 | 6,663 |  |
FGCO | Affiliates |  |  |  |
CURRENT LIABILITIES: |  |  |  |
Short-term borrowings | 478 | 389 |  |
Nuclear Generation Corp |  |  |  |
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Receivables- |  |  |  |
Customers | 0 | 0 |  |
Affiliated companies | 286 | 461 |  |
Other | 7 | 19 |  |
Notes receivable from affiliated companies | 768 | 805 |  |
Materials and supplies | 217 | 213 |  |
Derivatives | 0 | 0 |  |
Collateral | 0 | 0 |  |
Prepayments and other | 0 | 0 |  |
Total current assets | 1,278 | 1,498 |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | 8,588 | 8,233 |  |
Less - Accumulated provision for depreciation | 3,955 | 3,775 |  |
Property, plant and equipment in service net of accumulated provision for depreciation | 4,633 | 4,458 |  |
Construction work in progress | 789 | 878 |  |
Total net property, plant and equipment | 5,422 | 5,336 |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 1,510 | 1,327 |  |
Investment in affiliated companies | 0 | 0 |  |
Other | 0 | 0 |  |
Total other property and investments | 1,510 | 1,327 |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Accumulated deferred income tax benefits | 0 | 0 |  |
Customer intangibles | 0 | 0 |  |
Goodwill |  | 0 |  |
Property taxes | 14 | 28 |  |
Derivatives | 0 | 0 |  |
Other | 0 | 14 |  |
Total deferred charges and other assets | 14 | 42 |  |
Total assets | 8,224 | 8,203 |  |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | 68 | 308 |  |
Other |  | 0 |  |
Accounts payable- |  |  |  |
Affiliated companies | 155 | 368 |  |
Other | 0 | 0 |  |
Accrued taxes | 50 | 62 |  |
Derivatives | 0 | 0 |  |
Other | 9 | 9 |  |
Total current liabilities | 290 | 747 |  |
CAPITALIZATION: |  |  |  |
Total common stockholders' equity | 4,807 | 4,476 |  |
Long-term debt and other long-term obligations | 837 | 840 |  |
Total capitalization | 5,644 | 5,316 |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 0 | 0 |  |
Accumulated deferred income taxes | 787 | 697 |  |
Retirement benefits | 0 | 0 |  |
Asset retirement obligations | 689 | 640 |  |
Derivatives | 0 | 0 |  |
Other | 814 | 803 |  |
Total noncurrent liabilities | 2,290 | 2,140 |  |
Total liabilities and capitalization | 8,224 | 8,203 |  |
Nuclear Generation Corp | Affiliates |  |  |  |
CURRENT LIABILITIES: |  |  |  |
Short-term borrowings | 8 | 0 |  |
FES |  |  |  |
CURRENT ASSETS: |  |  |  |
Cash and cash equivalents | 2 | 2 | $ 2 | $ 2
Receivables- |  |  |  |
Customers | 225 | 275 |  |
Affiliated companies | 411 | 451 |  |
Other | 37 | 59 |  |
Notes receivable from affiliated companies | 0 | 11 |  |
Materials and supplies | 430 | 470 |  |
Derivatives | 155 | 154 |  |
Collateral | 20 | 70 |  |
Prepayments and other | 81 | 66 |  |
Total current assets | 1,361 | 1,558 |  |
PROPERTY, PLANT AND EQUIPMENT: |  |  |  |
In service | 13,992 | 14,311 |  |
Less - Accumulated provision for depreciation | 5,706 | 5,765 |  |
Property, plant and equipment in service net of accumulated provision for depreciation | 8,286 | 8,546 |  |
Construction work in progress | 1,061 | 1,157 |  |
Total net property, plant and equipment | 9,347 | 9,703 |  |
INVESTMENTS: |  |  |  |
Nuclear plant decommissioning trusts | 1,510 | 1,327 |  |
Investment in affiliated companies | 0 | 0 |  |
Other | 10 | 10 |  |
Total other property and investments | 1,520 | 1,337 |  |
DEFERRED CHARGES AND OTHER ASSETS: |  |  |  |
Accumulated deferred income tax benefits | 0 | 0 |  |
Customer intangibles | 52 | 61 |  |
Goodwill | 0 | 23 |  |
Property taxes | 20 | 40 |  |
Derivatives | 83 | 79 |  |
Other | 377 | 367 |  |
Total deferred charges and other assets | 532 | 570 |  |
Total assets | 12,760 | 13,168 |  |
CURRENT LIABILITIES: |  |  |  |
Currently payable long-term debt | 439 | 512 |  |
Other | 0 | 8 |  |
Accounts payable- |  |  |  |
Affiliated companies | 360 | 542 |  |
Other | 114 | 139 |  |
Accrued taxes | 78 | 76 |  |
Derivatives | 99 | 104 |  |
Other | 173 | 181 |  |
Total current liabilities | 1,473 | 1,562 |  |
CAPITALIZATION: |  |  |  |
Total common stockholders' equity | 5,357 | 5,605 |  |
Long-term debt and other long-term obligations | 2,347 | 2,510 |  |
Total capitalization | 7,704 | 8,115 |  |
NONCURRENT LIABILITIES: |  |  |  |
Deferred gain on sale and leaseback transaction | 774 | 791 |  |
Accumulated deferred income taxes | 627 | 600 |  |
Retirement benefits | 344 | 332 |  |
Asset retirement obligations | 877 | 831 |  |
Derivatives | 46 | 38 |  |
Other | 915 | 899 |  |
Total noncurrent liabilities | 3,583 | 3,491 |  |
Total liabilities and capitalization | 12,760 | 13,168 |  |
FES | Affiliates |  |  |  |
CURRENT LIABILITIES: |  |  |  |
Short-term borrowings | $ 210 | $ 0 |  |

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