v2.4.0.8

Acquisitions and Dispositions (Assets Held For Sale) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | $ 378 | $ 62 | $ (578) | $ 82 |
Disposal Group, Including Discontinued Operation, Classified Balance Sheet Disclosures [Abstract] |  |  |  |  |
Current assets | 335 |  | 335 |  |
Current liabilities | 284 |  | 284 |  | 7
Duke Energy Ohio [Member] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | 413 | 35 | (597) | 39 |
Disposal Group, Including Discontinued Operation, Classified Balance Sheet Disclosures [Abstract] |  |  |  |  |
Current assets | 284 |  | 284 |  |
Current liabilities | 269 |  | 269 |  |
Midwest Generation Business [Member] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Revenue | 620 | 491 | 1,233 | 1,369 |
Discontinued Operation, Provision for Loss (Gain) on Disposal, Net of Tax | 460 |  | (847) | 0 |
Disposal Group, Including Discontinued Operation, Operating Income (Loss) | 623 | 82 | (864) | 126 |
Discontinued Operation, Tax Effect of Discontinued Operation | 218 | 34 | (321) | 43 |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | 405 | 48 | (543) | 83 |
Disposal Group, Including Discontinued Operation, Classified Balance Sheet Disclosures [Abstract] |  |  |  |  |
Current assets | 335 |  | 335 |  |
Investments and other assets | 43 |  | 43 |  |
Property, plant and equipment | 2,675 |  | 2,675 |  |
Total assets held for sale | 3,053 |  | 3,053 |  |
Current liabilities | 284 |  | 284 |  |
Deferred credits and other liabilities | 57 |  | 57 |  |
Total liabilities associated with assets held for sale | 341 |  | 341 |  |
Midwest Generation Business [Member] | Duke Energy Ohio [Member] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Revenue | 536 | 389 | 853 | 1,054 |
Discontinued Operation, Provision for Loss (Gain) on Disposal, Net of Tax | 466 |  | (878) |  |
Disposal Group, Including Discontinued Operation, Operating Income (Loss) | 647 | 65 | (917) | 71 |
Discontinued Operation, Tax Effect of Discontinued Operation | 234 | 30 | (320) | 32 |
Disposal Group, Including Discontinued Operation, Classified Balance Sheet Disclosures [Abstract] |  |  |  |  |
Current assets | 284 |  | 284 |  |
Investments and other assets | 38 |  | 38 |  |
Property, plant and equipment | 2,644 |  | 2,644 |  |
Total assets held for sale | 2,966 |  | 2,966 |  |
Current liabilities | 269 |  | 269 |  |
Deferred credits and other liabilities | 57 |  | 57 |  |
Total liabilities associated with assets held for sale | 326 |  | 326 |  |
Other Disposal Groups [Member] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | $ (27) | $ 14 | $ (35) | $ (1) |

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