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Jointly-Owned Electric Plants (Tables)
 12 Months Ended
Dec. 31, 2019
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, 2019
 
Ownership
Interest
 
Gross
Investment(a)
 
Accumulated
Depreciation(a)
 
Construction
Work
in Progress
 
 
 
(millions)
FPL:
 
 
 
 
 
 
 
St. Lucie Unit No. 2
85
%
 
$
2,226

 
$
972

 
$
66

Scherer Unit No. 4
76
%
 
$
1,227

 
$
473

 
$
55

Gulf Power:
 
 
 
 
 
 
 
Daniel Units Nos. 1 and 2
50
%
 
$
715

 
$
222

 
$
22

Scherer Unit No. 3
25
%
 
$
423

 
$
146

 
$
14

NEER:
 
 
 
 
 
 
 
Duane Arnold
70
%
 
$
69

 
$
41

 
$
—

Seabrook
88.23
%
 
$
1,270

 
$
375

 
$
45

Wyman Station Unit No. 4
91.19
%
 
$
29

 
$
7

 
$
1

Stanton
65
%
 
$
137

 
$
7

 
$
—

Transmission substation assets located in Seabrook, New Hampshire
88.23
%
 
$
94

 
$
13

 
$
14

______________________
(a)
Excludes nuclear fuel.