v3.3.0.814

Goodwill and Intangible Assets (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Goodwill [Roll Forward] |  |  |  |  |
Foreign exchange and other changes |  |  | $ (33) |  |
Goodwill, Acquired During Period |  |  | 24 |  |
Goodwill as adjusted for accumulated impairment charges | $ 16,312 |  | 16,312 |  | $ 16,321
Asset impairment charges | 111 | $ 1 | 111 | $ 81 |
Regulated Utilities [Member] |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill as adjusted for accumulated impairment charges | 15,950 |  | 15,950 |  | 15,950
International [Member] |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Foreign exchange and other changes |  |  | (33) |  |
Goodwill as adjusted for accumulated impairment charges | 274 |  | 274 |  | 307
Commercial Portfolio [Member] |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill, Acquired During Period |  |  | 24 |  |
Goodwill as adjusted for accumulated impairment charges | 88 |  | 88 |  | 64
Commercial Portfolio [Member] | Other VIEs [Member] |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Asset impairment charges |  |  |  | 94 |
Duke Energy Ohio [Member] |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill | 920 |  | 920 |  | 920
Goodwill as adjusted for accumulated impairment charges | 920 |  | 920 |  | 920
Goodwill, Impaired, Accumulated Impairment Loss | $ 216 |  | $ 216 |  | 216
Asset impairment charges |  |  |  | 94 |
Duke Energy Ohio [Member] | Other VIEs [Member] |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Asset impairment charges |  |  |  | 94 | $ 94
Duke Energy Ohio [Member] | Commercial Portfolio [Member] | Other VIEs [Member] |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Asset impairment charges |  |  |  | $ 94 |

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