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Jointly-Owned Electric Plants | 12 Months Ended
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Dec. 31, 2017
Jointly-Owned Electric Plants [Abstract] |
Jointly-Owned Electric Plants | Jointly-Owned Electric Plants Certain NEE subsidiaries own undivided interests in the jointly-owned facilities described below, and are entitled to a proportionate share of the output from those facilities. The subsidiaries are responsible for their share of the operating costs, as well as providing their own financing. Accordingly, each subsidiary's proportionate share of the facilities and related revenues and expenses is included in the appropriate balance sheet and statement of income captions. NEE's and FPL's respective shares of direct expenses for these facilities are included in fuel, purchased power and interchange expense, O&M expenses, depreciation and amortization expense and taxes other than income taxes and other - net in NEE's and FPL's consolidated statements of income. NEE's and FPL's proportionate ownership interest in jointly-owned facilities is as follows:
| December 31, 2017
| Ownership Interest |  | Gross Investment(a) |  | Accumulated Depreciation(a) |  | Construction Work in Progress
|  |  | (millions)
FPL: |  |  |  |  |  |  |
St. Lucie Unit No. 2 | 85 | % |  | $ | 2,205 |  |  | $ | 863 |  |  | $ | 36 |
St. Johns River Power Park units (SJRPP) and coal terminal(b) | 20 | % |  | $ | 394 |  |  | $ | 215 |  |  | $ | — |
Scherer Unit No. 4 | 76 | % |  | $ | 1,146 |  |  | $ | 419 |  |  | $ | 24 |
NEER: |  |  |  |  |  |  |
Duane Arnold(c) | 70 | % |  | $ | 61 |  |  | $ | — |  |  | $ | 4 |
Seabrook | 88.23 | % |  | $ | 1,181 |  |  | $ | 302 |  |  | $ | 78 |
Wyman Station Unit No. 4 | 87.49 | % |  | $ | 26 |  |  | $ | 4 |  |  | $ | — |
Corporate and Other: |  |  |  |  |  |  |
Transmission substation assets located in Seabrook, New Hampshire | 88.23 | % |  | $ | 78 |  |  | $ | 14 |  |  | $ | 3 |
______________________
(a) | Excludes nuclear fuel.
(b) | SJRPP was shut down in January 2018. See Note 13 - Contracts.
(c) | Reflects impairment charge of $420 million pretax. See Note 4 - Nonrecurring Fair Value Measurements.

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- Definition Jointly-Owned Electric Plants [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for public utilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -URI http://asc.fasb.org/topic&trid=2156578 + Details
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