v3.3.0.814

Regulatory Matters (Schedule of Net Carrying Value Of Facilities and Megawatt Capacity) (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2015 USD ($) MW | Dec. 31, 2014 USD ($)
Public Utilities, General Disclosures [Line Items] |  |
Remaining net book value (in millions) | $ 73,776 | $ 70,046
Generation Facilities To Be Retired [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 1,541 |
Remaining net book value (in millions) | $ 207 |
Duke Energy Carolinas [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Remaining net book value (in millions) | 25,208 | 24,672
Duke Energy Carolinas [Member] | Generation Facilities To Be Retired [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Remaining net book value (in millions) | 110 |
Progress Energy [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Remaining net book value (in millions) | $ 27,538 | 25,144
Progress Energy [Member] | Generation Facilities To Be Retired [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 873 |
Remaining net book value (in millions) | $ 121 |
Duke Energy Progress [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Remaining net book value (in millions) | $ 17,172 | 15,186
Duke Energy Progress [Member] | Generation Facilities To Be Retired [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 376 |
Remaining net book value (in millions) | $ 460 |
Duke Energy Florida [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Remaining net book value (in millions) | $ 10,363 | 9,955
Duke Energy Florida [Member] | Generation Facilities To Be Retired [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 873 |
Remaining net book value (in millions) | $ 121 |
Duke Energy Ohio [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Remaining net book value (in millions) | 5,175 | 4,937
Duke Energy Indiana [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Remaining net book value (in millions) | $ 9,340 | $ 8,815
Duke Energy Indiana [Member] | Generation Facilities To Be Retired [Member] |  |
Public Utilities, General Disclosures [Line Items] |  |
Capacity (in MW) | MW | 668 |
Remaining net book value (in millions) | $ 86 |

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