v3.3.0.814

Regulatory Matters (Tables) | 9 Months Ended
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Sep. 30, 2015
Public Utilities, General Disclosures [Line Items] |
Schedule of Potential Plant Retirements | The table below contains the net carrying value of generating facilities planned for retirement or included in recent IRPs as evaluated for potential retirement due to a lack of requisite environmental control equipment. Dollar amounts in the table below are included in Net property, plant and equipment on the Condensed Consolidated Balance Sheets.
| September 30, 2015
|  |  |  |  | Duke |  |  | Duke |
| Duke |  |  | Progress |  |  | Energy |  |  | Energy |
| Energy |  |  | Energy(b) |  |  | Florida(b) |  |  | Indiana(c) |
Capacity (in MW) | 1,541 |  |  | 873 |  |  | 873 |  |  | 668 |
Remaining net book value (in millions)(a) | $ | 207 |  |  | $ | 121 |  |  | $ | 121 |  |  | $ | 86 |
(a) | Remaining net book value amounts presented exclude any capitalized asset retirement costs related to closure of ash basins.
(b) | Includes Crystal River Units 1 and 2.
(c) | Includes Wabash River Units 2 through 6. Wabash River Unit 6 is being evaluated for potential conversion to natural gas. Duke Energy Indiana committed to retire or convert the Wabash River Units 2 through 6 by June 2018 in conjunction with a settlement agreement associated with the Edwardsport air permit.

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- Definition Generating facilities that are still operating, but are expected to be retired significnatly before the end of their previously estimated useful lives. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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