v2.4.0.8

Organization and Basis of Presentation (Schedule of Excise Taxes) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Organization And Basis Of Presentation [Line Items] |  |  |  |
Excise taxes collected | $ 101 | $ 168 | $ 416 | $ 457
Duke Energy Carolinas [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Excise taxes collected | 4 | 46 | 93 | 124
Progress Energy [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Excise taxes collected | 63 | 89 | 214 | 230
Duke Energy Progress [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Excise taxes collected |  | 33 | 56 | 88
Duke Energy Florida [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Excise taxes collected | 63 | 56 | 158 | 142
Duke Energy Ohio [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Excise taxes collected | 24 | 24 | 80 | 77
Duke Energy Indiana [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Excise taxes collected | $ 10 | $ 9 | $ 29 | $ 26

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- Definition The excise taxes collected by a public utility and reported in revenues if the amount of excise taxes is equal to 1 percent or more of such total. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Subparagraph e -Article 5 + Details
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