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Jointly-Owned Electric Plants (Tables)
 12 Months Ended
Dec. 31, 2015
Jointly-Owned Electric Plants [Abstract]  
Proportionate Ownership Interest In Jointly-Owned Facilities
NEE's and FPL's proportionate ownership interest in jointly-owned facilities is as follows:
 
December 31, 2015
 
Ownership
Interest
 
Gross
Investment(a)
 
Accumulated
Depreciation(a)
 
Construction
Work
in Progress
 
 
 
(millions)
FPL:
 
 
 
 
 
 
 
St. Lucie Unit No. 2
85
%
 
$
2,190

 
$
777

 
$
23

St. Johns River Power Park units and coal terminal
20
%
 
$
398

 
$
207

 
$
2

Scherer Unit No. 4
76
%
 
$
1,130

 
$
378

 
$
—

NEER:
 
 
 
 
 
 
 
Duane Arnold
70
%
 
$
435

 
$
126

 
$
24

Seabrook
88.23
%
 
$
1,111

 
$
239

 
$
67

Wyman Station Unit No. 4
84.35
%
 
$
74

 
$
51

 
$
—

Corporate and Other:
 
 
 
 
 
 
 
Transmission substation assets located in Seabrook, New Hampshire
88.23
%
 
$
73

 
$
19

 
$
3

______________________
(a)
Excludes nuclear fuel.