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Jointly Owned Utility Facilities (Tables)
 12 Months Ended
Dec. 31, 2017
Jointly Owned Facilities [Line Items]  
Jointly Owned Utility Facilities
At December 31, 2017 and 2016, the Balance Sheets reflect the owned interests in the facilities listed below.
 
 
Ownership
Interest
 
Electric Plant
 
Accumulated
Depreciation
 
Construction
Work
in Progress
PPL and LKE
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
Trimble County Unit 1
75.00
%
 
$
427

 
$
69

 
$
1

 
Trimble County Unit 2
75.00
%
 
1,032

 
176

 
198

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
Trimble County Unit 1
75.00
%
 
$
407

 
$
55

 
$
1

 
Trimble County Unit 2
75.00
%
 
1,026

 
161

 
83

 
 
 
 
 
 
 
 
 
LG&E
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
E.W. Brown Units 6-7
38.00
%
 
$
41

 
$
17

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
53.00
%
 
52

 
15

 
—

 
Trimble County Unit 1
75.00
%
 
427

 
69

 
1

 
Trimble County Unit 2
14.25
%
 
215

 
36

 
102

 
Trimble County Units 5-6
29.00
%
 
32

 
9

 
—

 
Trimble County Units 7-10
37.00
%
 
73

 
21

 
—

 
Cane Run Unit 7
22.00
%
 
120

 
8

 
1

 
E.W. Brown Solar Unit
39.00
%
 
10

 
1

 
—

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
E.W. Brown Units 6-7
38.00
%
 
$
40

 
$
15

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
53.00
%
 
55

 
12

 
1

 
Trimble County Unit 1
75.00
%
 
407

 
55

 
1

 
Trimble County Unit 2
14.25
%
 
214

 
32

 
43

 
Trimble County Units 5-6
29.00
%
 
30

 
8

 
1

 
Trimble County Units 7-10
37.00
%
 
71

 
17

 
1

 
Cane Run Unit 7
22.00
%
 
114

 
5

 
2

 
E.W. Brown Solar Unit
39.00
%
 
10

 
—

 
—

 
 
Ownership
Interest
 
Electric Plant
 
Accumulated
Depreciation
 
Construction
Work
in Progress
 
 
 
 
 
 
 
 
 
KU
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
E.W. Brown Units 6-7
62.00
%
 
$
66

 
$
27

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
47.00
%
 
46

 
13

 
—

 
Trimble County Unit 2
60.75
%
 
817

 
140

 
96

 
Trimble County Units 5-6
71.00
%
 
76

 
20

 
—

 
Trimble County Units 7-10
63.00
%
 
120

 
34

 
—

 
Cane Run Unit 7
78.00
%
 
431

 
31

 
4

 
E.W. Brown Solar Unit
61.00
%
 
16

 
1

 
—

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
E.W. Brown Units 6-7
62.00
%
 
$
65

 
$
23

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
47.00
%
 
50

 
11

 
1

 
Trimble County Unit 2
60.75
%
 
812

 
129

 
40

 
Trimble County Units 5-6
71.00
%
 
74

 
19

 
—

 
Trimble County Units 7-10
63.00
%
 
121

 
29

 
1

 
Cane Run Unit 7
78.00
%
 
412

 
18

 
4

 
E.W. Brown Solar Unit
61.00
%
 
15

 
—

 
—
LG And E And KU Energy LLC [Member]  
Jointly Owned Facilities [Line Items]  
Jointly Owned Utility Facilities
At December 31, 2017 and 2016, the Balance Sheets reflect the owned interests in the facilities listed below.
 
 
Ownership
Interest
 
Electric Plant
 
Accumulated
Depreciation
 
Construction
Work
in Progress
PPL and LKE
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
Trimble County Unit 1
75.00
%
 
$
427

 
$
69

 
$
1

 
Trimble County Unit 2
75.00
%
 
1,032

 
176

 
198

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
Trimble County Unit 1
75.00
%
 
$
407

 
$
55

 
$
1

 
Trimble County Unit 2
75.00
%
 
1,026

 
161

 
83

 
 
 
 
 
 
 
 
 
LG&E
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
E.W. Brown Units 6-7
38.00
%
 
$
41

 
$
17

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
53.00
%
 
52

 
15

 
—

 
Trimble County Unit 1
75.00
%
 
427

 
69

 
1

 
Trimble County Unit 2
14.25
%
 
215

 
36

 
102

 
Trimble County Units 5-6
29.00
%
 
32

 
9

 
—

 
Trimble County Units 7-10
37.00
%
 
73

 
21

 
—

 
Cane Run Unit 7
22.00
%
 
120

 
8

 
1

 
E.W. Brown Solar Unit
39.00
%
 
10

 
1

 
—

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
E.W. Brown Units 6-7
38.00
%
 
$
40

 
$
15

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
53.00
%
 
55

 
12

 
1

 
Trimble County Unit 1
75.00
%
 
407

 
55

 
1

 
Trimble County Unit 2
14.25
%
 
214

 
32

 
43

 
Trimble County Units 5-6
29.00
%
 
30

 
8

 
1

 
Trimble County Units 7-10
37.00
%
 
71

 
17

 
1

 
Cane Run Unit 7
22.00
%
 
114

 
5

 
2

 
E.W. Brown Solar Unit
39.00
%
 
10

 
—

 
—

 
 
Ownership
Interest
 
Electric Plant
 
Accumulated
Depreciation
 
Construction
Work
in Progress
 
 
 
 
 
 
 
 
 
KU
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
E.W. Brown Units 6-7
62.00
%
 
$
66

 
$
27

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
47.00
%
 
46

 
13

 
—

 
Trimble County Unit 2
60.75
%
 
817

 
140

 
96

 
Trimble County Units 5-6
71.00
%
 
76

 
20

 
—

 
Trimble County Units 7-10
63.00
%
 
120

 
34

 
—

 
Cane Run Unit 7
78.00
%
 
431

 
31

 
4

 
E.W. Brown Solar Unit
61.00
%
 
16

 
1

 
—

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
E.W. Brown Units 6-7
62.00
%
 
$
65

 
$
23

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
47.00
%
 
50

 
11

 
1

 
Trimble County Unit 2
60.75
%
 
812

 
129

 
40

 
Trimble County Units 5-6
71.00
%
 
74

 
19

 
—

 
Trimble County Units 7-10
63.00
%
 
121

 
29

 
1

 
Cane Run Unit 7
78.00
%
 
412

 
18

 
4

 
E.W. Brown Solar Unit
61.00
%
 
15

 
—

 
—
Louisville Gas And Electric Co [Member]  
Jointly Owned Facilities [Line Items]  
Jointly Owned Utility Facilities
At December 31, 2017 and 2016, the Balance Sheets reflect the owned interests in the facilities listed below.
 
 
Ownership
Interest
 
Electric Plant
 
Accumulated
Depreciation
 
Construction
Work
in Progress
PPL and LKE
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
Trimble County Unit 1
75.00
%
 
$
427

 
$
69

 
$
1

 
Trimble County Unit 2
75.00
%
 
1,032

 
176

 
198

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
Trimble County Unit 1
75.00
%
 
$
407

 
$
55

 
$
1

 
Trimble County Unit 2
75.00
%
 
1,026

 
161

 
83

 
 
 
 
 
 
 
 
 
LG&E
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
E.W. Brown Units 6-7
38.00
%
 
$
41

 
$
17

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
53.00
%
 
52

 
15

 
—

 
Trimble County Unit 1
75.00
%
 
427

 
69

 
1

 
Trimble County Unit 2
14.25
%
 
215

 
36

 
102

 
Trimble County Units 5-6
29.00
%
 
32

 
9

 
—

 
Trimble County Units 7-10
37.00
%
 
73

 
21

 
—

 
Cane Run Unit 7
22.00
%
 
120

 
8

 
1

 
E.W. Brown Solar Unit
39.00
%
 
10

 
1

 
—

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
E.W. Brown Units 6-7
38.00
%
 
$
40

 
$
15

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
53.00
%
 
55

 
12

 
1

 
Trimble County Unit 1
75.00
%
 
407

 
55

 
1

 
Trimble County Unit 2
14.25
%
 
214

 
32

 
43

 
Trimble County Units 5-6
29.00
%
 
30

 
8

 
1

 
Trimble County Units 7-10
37.00
%
 
71

 
17

 
1

 
Cane Run Unit 7
22.00
%
 
114

 
5

 
2

 
E.W. Brown Solar Unit
39.00
%
 
10

 
—

 
—

 
 
Ownership
Interest
 
Electric Plant
 
Accumulated
Depreciation
 
Construction
Work
in Progress
 
 
 
 
 
 
 
 
 
KU
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
E.W. Brown Units 6-7
62.00
%
 
$
66

 
$
27

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
47.00
%
 
46

 
13

 
—

 
Trimble County Unit 2
60.75
%
 
817

 
140

 
96

 
Trimble County Units 5-6
71.00
%
 
76

 
20

 
—

 
Trimble County Units 7-10
63.00
%
 
120

 
34

 
—

 
Cane Run Unit 7
78.00
%
 
431

 
31

 
4

 
E.W. Brown Solar Unit
61.00
%
 
16

 
1

 
—

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
E.W. Brown Units 6-7
62.00
%
 
$
65

 
$
23

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
47.00
%
 
50

 
11

 
1

 
Trimble County Unit 2
60.75
%
 
812

 
129

 
40

 
Trimble County Units 5-6
71.00
%
 
74

 
19

 
—

 
Trimble County Units 7-10
63.00
%
 
121

 
29

 
1

 
Cane Run Unit 7
78.00
%
 
412

 
18

 
4

 
E.W. Brown Solar Unit
61.00
%
 
15

 
—

 
—
Kentucky Utilities Co [Member]  
Jointly Owned Facilities [Line Items]  
Jointly Owned Utility Facilities
At December 31, 2017 and 2016, the Balance Sheets reflect the owned interests in the facilities listed below.
 
 
Ownership
Interest
 
Electric Plant
 
Accumulated
Depreciation
 
Construction
Work
in Progress
PPL and LKE
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
Trimble County Unit 1
75.00
%
 
$
427

 
$
69

 
$
1

 
Trimble County Unit 2
75.00
%
 
1,032

 
176

 
198

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
Trimble County Unit 1
75.00
%
 
$
407

 
$
55

 
$
1

 
Trimble County Unit 2
75.00
%
 
1,026

 
161

 
83

 
 
 
 
 
 
 
 
 
LG&E
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
E.W. Brown Units 6-7
38.00
%
 
$
41

 
$
17

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
53.00
%
 
52

 
15

 
—

 
Trimble County Unit 1
75.00
%
 
427

 
69

 
1

 
Trimble County Unit 2
14.25
%
 
215

 
36

 
102

 
Trimble County Units 5-6
29.00
%
 
32

 
9

 
—

 
Trimble County Units 7-10
37.00
%
 
73

 
21

 
—

 
Cane Run Unit 7
22.00
%
 
120

 
8

 
1

 
E.W. Brown Solar Unit
39.00
%
 
10

 
1

 
—

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
E.W. Brown Units 6-7
38.00
%
 
$
40

 
$
15

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
53.00
%
 
55

 
12

 
1

 
Trimble County Unit 1
75.00
%
 
407

 
55

 
1

 
Trimble County Unit 2
14.25
%
 
214

 
32

 
43

 
Trimble County Units 5-6
29.00
%
 
30

 
8

 
1

 
Trimble County Units 7-10
37.00
%
 
71

 
17

 
1

 
Cane Run Unit 7
22.00
%
 
114

 
5

 
2

 
E.W. Brown Solar Unit
39.00
%
 
10

 
—

 
—

 
 
Ownership
Interest
 
Electric Plant
 
Accumulated
Depreciation
 
Construction
Work
in Progress
 
 
 
 
 
 
 
 
 
KU
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
Generating Plants
 
 
 
 
 
 
 
 
E.W. Brown Units 6-7
62.00
%
 
$
66

 
$
27

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
47.00
%
 
46

 
13

 
—

 
Trimble County Unit 2
60.75
%
 
817

 
140

 
96

 
Trimble County Units 5-6
71.00
%
 
76

 
20

 
—

 
Trimble County Units 7-10
63.00
%
 
120

 
34

 
—

 
Cane Run Unit 7
78.00
%
 
431

 
31

 
4

 
E.W. Brown Solar Unit
61.00
%
 
16

 
1

 
—

 
 
 
 
 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

 
 

 
Generating Plants
 

 
 

 
 

 
 

 
E.W. Brown Units 6-7
62.00
%
 
$
65

 
$
23

 
$
—

 
Paddy's Run Unit 13 & E.W. Brown Unit 5
47.00
%
 
50

 
11

 
1

 
Trimble County Unit 2
60.75
%
 
812

 
129

 
40

 
Trimble County Units 5-6
71.00
%
 
74

 
19

 
—

 
Trimble County Units 7-10
63.00
%
 
121

 
29

 
1

 
Cane Run Unit 7
78.00
%
 
412

 
18

 
4

 
E.W. Brown Solar Unit
61.00
%
 
15

 
—

 
—