v2.4.0.8

Goodwill (Tables) | 9 Months Ended
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Sep. 30, 2014
Goodwill [Line Items] |
Goodwill By Reportable Operating Segment | The following tables present goodwill by reportable operating segment for Duke Energy and Duke Energy Ohio. Duke Energy
(in millions) | Regulated Utilities |  |  | International Energy |  |  | Commercial Power |  |  | Total |
Balance at December 31, 2013 |  |  |  |  |  |  |
Goodwill | $ | 15,950 |  |  | $ | 326 |  |  | $ | 935 |  |  | $ | 17,211 |
Accumulated impairment charges | — |  |  | — |  |  | (871 | ) |  | (871 | )
Balance at December 31, 2013, as adjusted for accumulated impairment charges | 15,950 |  |  | 326 |  |  | 64 |  |  | 16,340 |
Foreign exchange and other changes | — |  |  | (9 | ) |  | — |  |  | (9 | )
Balance at September 30, 2014 |  |  |  |  |  |  |
Goodwill | 15,950 |  |  | 317 |  |  | 935 |  |  | 17,202 |
Accumulated impairment charges | — |  |  | — |  |  | (871 | ) |  | (871 | )
Balance at September 30, 2014, as adjusted for accumulated impairment charges | $ | 15,950 |  |  | $ | 317 |  |  | $ | 64 |  |  | $ | 16,331 |
Duke Energy Ohio [Member] |
Goodwill [Line Items] |
Goodwill By Reportable Operating Segment | Duke Energy Ohio
(in millions) | Regulated Utilities |  |  | Commercial Power |  |  | Total |
Balance at December 31, 2013 |  |  |  |  |
Goodwill | $ | 1,136 |  |  | $ | 1,188 |  |  | $ | 2,324 |
Accumulated impairment charges | (216 | ) |  | (1,188 | ) |  | (1,404 | )
Balance at December 31, 2013, as adjusted for accumulated impairment charges | 920 |  |  | — |  |  | 920 |
Balance at September 30, 2014 |  |  |  |  |
Goodwill | 1,136 |  |  | 1,188 |  |  | 2,324 |
Accumulated impairment charges | (216 | ) |  | (1,188 | ) |  | (1,404 | )
Balance at September 30, 2014, as adjusted for accumulated impairment charges | $ | 920 |  |  | $ | — |  |  | $ | 920 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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