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Jointly-Owned Electric Plants
 12 Months Ended
Dec. 31, 2019
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, 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.