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Accumulated Other Comprehensive Income (Loss)
 6 Months Ended
Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Accumulated Other Comprehensive Income (Loss)
16. Accumulated Other Comprehensive Income (Loss)
 
(PPL and LKE)
 
The after-tax changes in AOCI by component for the periods ended June 30 were as follows.
 
Foreign
currency
translation
adjustments
 
Unrealized gains (losses)
 on qualifying
derivatives
 
 
 
Defined benefit plans
 
 
 
 
 
Equity
investees'
AOCI
 
Prior
service
costs
 
Actuarial
gain
(loss)
 
Total
PPL
 
 
 
 
 
 
 
 
 
 
 
March 31, 2017
$
(1,651
)
 
$
(14
)
 
$
(1
)
 
$
(8
)
 
$
(2,103
)
 
$
(3,777
)
Amounts arising during the period
231

 
(24
)
 
—

 
—

 
(11
)
 
196

Reclassifications from AOCI
—

 
25

 
1

 
1

 
31

 
58

Net OCI during the period
231

 
1

 
1

 
1

 
20

 
254

June 30, 2017
$
(1,420
)
 
$
(13
)
 
$
—

 
$
(7
)
 
$
(2,083
)
 
$
(3,523
)
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2016
$
(1,627
)
 
$
(7
)
 
$
(1
)
 
$
(8
)
 
$
(2,135
)
 
$
(3,778
)
Amounts arising during the period
207

 
(30
)
 
—

 
—

 
(11
)
 
166

Reclassifications from AOCI
—

 
24

 
1

 
1

 
63

 
89

Net OCI during the period
207

 
(6
)
 
1

 
1

 
52

 
255

June 30, 2017
$
(1,420
)
 
$
(13
)
 
$
—

 
$
(7
)
 
$
(2,083
)
 
$
(3,523
)
 
 
 
 
 
 
 
 
 
 
 
 
March 31, 2016
$
(984
)
 
$
(5
)
 
$
—

 
$
(6
)
 
$
(2,164
)
 
$
(3,159
)
Amounts arising during the period
268

 
(85
)
 
—

 
—

 
2

 
185

Reclassifications from AOCI
—

 
85

 
(1
)
 
1

 
32

 
117

Net OCI during the period
268

 
—

 
(1
)
 
1

 
34

 
302

June 30, 2016
$
(716
)
 
$
(5
)
 
$
(1
)
 
$
(5
)
 
$
(2,130
)
 
$
(2,857
)
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2015
$
(520
)
 
$
(7
)
 
$
—

 
$
(6
)
 
$
(2,195
)
 
$
(2,728
)
Amounts arising during the period
(196
)
 
(5
)
 
—

 
—

 
2

 
(199
)
Reclassifications from AOCI
—

 
7

 
(1
)
 
1

 
63

 
70

Net OCI during the period
(196
)
 
2

 
(1
)
 
1

 
65

 
(129
)
June 30, 2016
$
(716
)
 
$
(5
)
 
$
(1
)
 
$
(5
)
 
$
(2,130
)
 
$
(2,857
)
 
 
 
 
 
 
 
 
 
 
 
 
LKE
 
 
 
 
 
 
 
 
 
 
 
March 31, 2017
 
 
 
 
$
—

 
$
(8
)
 
$
(60
)
 
$
(68
)
Amounts arising during the period
 
 
 
 
—

 
—

 
(11
)
 
(11
)
Reclassifications from AOCI
 
 
 
 
—

 
1

 
1

 
2

Net OCI during the period
 
 
 
 
—

 
1

 
(10
)
 
(9
)
June 30, 2017
 
 
 
 
$
—

 
$
(7
)
 
$
(70
)
 
$
(77
)
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2016
 
 
 
 
$
(1
)
 
$
(8
)
 
$
(61
)
 
$
(70
)
Amounts arising during the period
 
 
 
 
—

 
—

 
(11
)
 
(11
)
Reclassifications from AOCI
 
 
 
 
1

 
1

 
2

 
4

Net OCI during the period
 
 
 
 
1

 
1

 
(9
)
 
(7
)
June 30, 2017
 
 
 
 
$
—

 
$
(7
)
 
$
(70
)
 
$
(77
)
 
 
 
 
 
 
 
 
 
 
 
 
March 31, 2016
 
 
 
 
$
—

 
$
(10
)
 
$
(35
)
 
$
(45
)
Amounts arising during the period
 
 
 
 
—

 
—

 
1

 
1

Reclassifications from AOCI
 
 
 
 
(1
)
 
1

 
1

 
1

Net OCI during the period
 
 
 
 
(1
)
 
1

 
2

 
2

June 30, 2016
 
 
 
 
$
(1
)
 
$
(9
)
 
$
(33
)
 
$
(43
)
 
Foreign
currency
translation
adjustments
 
Unrealized gains (losses)
 on qualifying
derivatives
 
 
 
Defined benefit plans
 
 
 
 
 
Equity
investees'
AOCI
 
Prior
service
costs
 
Actuarial
gain
(loss)
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2015
 
 
 
 
$
—

 
$
(10
)
 
$
(36
)
 
$
(46
)
Amounts arising during the period
 
 
 
 
—

 
—

 
1

 
1

Reclassifications from AOCI
 
 
 
 
(1
)
 
1

 
2

 
2

Net OCI during the period
 
 
 
 
(1
)
 
1

 
3

 
3

June 30, 2016
 
 
 
 
$
(1
)
 
$
(9
)
 
$
(33
)
 
$
(43
)

 
(PPL)
 
The following table presents the gains (losses) and related income taxes for reclassifications from AOCI for the periods ended June 30. The defined benefit plan components of AOCI are not reflected in their entirety in the Statement of Income during the periods; rather, they are included in the computation of net periodic defined benefit costs (credits) and subject to capitalization. See Note 8 for additional information.
 
 
Three Months
 
Six Months
 
Affected Line Item on the
Details about AOCI
 
2017
 
2016
 
2017
 
2016
 
Statements of Income
Qualifying derivatives
 
 
 
 
 
 
 
 
 
 
Interest rate swaps
 
$
(2
)
 
$
(2
)
 
$
(5
)
 
$
(3
)
 
Interest Expense
Cross-currency swaps
 
(29
)
 
(103
)
 
(26
)
 
(6
)
 
Other Income (Expense) - net
 
 
(1
)
 
(1
)
 
—

 
—

 
Interest Expense
Total Pre-tax
 
(32
)
 
(106
)
 
(31
)
 
(9
)
 
 
Income Taxes
 
7

 
21

 
7

 
2

 
 
Total After-tax
 
(25
)
 
(85
)
 
(24
)
 
(7
)
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity investees' AOCI
 
(1
)
 
1

 
(1
)
 
1

 
Other Income (Expense) - net
Total Pre-tax
 
(1
)
 
1

 
(1
)
 
1

 
 
Income Taxes
 
—

 
—

 
—

 
—

 
 
Total After-tax
 
(1
)
 
1

 
(1
)
 
1

 
 
 
 
 
 
 
 
 
 
 
 
 
Defined benefit plans
 
 
 
 
 
 
 
 
 
 
Prior service costs
 
(1
)
 
(1
)
 
(1
)
 
(1
)
 
 
Net actuarial loss
 
(40
)
 
(40
)
 
(81
)
 
(80
)
 
 
Total Pre-tax
 
(41
)
 
(41
)
 
(82
)
 
(81
)
 
 
Income Taxes
 
9

 
8

 
18

 
17

 
 
Total After-tax
 
(32
)
 
(33
)
 
(64
)
 
(64
)
 
 
 
 
 
 
 
 
 
 
 
 
 
Total reclassifications during the period
 
$
(58
)
 
$
(117
)
 
$
(89
)
 
$
(70
)
 
 
LG And E And KU Energy LLC [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Accumulated Other Comprehensive Income (Loss)
16. Accumulated Other Comprehensive Income (Loss)
 
(PPL and LKE)
 
The after-tax changes in AOCI by component for the periods ended June 30 were as follows.
 
Foreign
currency
translation
adjustments
 
Unrealized gains (losses)
 on qualifying
derivatives
 
 
 
Defined benefit plans
 
 
 
 
 
Equity
investees'
AOCI
 
Prior
service
costs
 
Actuarial
gain
(loss)
 
Total
PPL
 
 
 
 
 
 
 
 
 
 
 
March 31, 2017
$
(1,651
)
 
$
(14
)
 
$
(1
)
 
$
(8
)
 
$
(2,103
)
 
$
(3,777
)
Amounts arising during the period
231

 
(24
)
 
—

 
—

 
(11
)
 
196

Reclassifications from AOCI
—

 
25

 
1

 
1

 
31

 
58

Net OCI during the period
231

 
1

 
1

 
1

 
20

 
254

June 30, 2017
$
(1,420
)
 
$
(13
)
 
$
—

 
$
(7
)
 
$
(2,083
)
 
$
(3,523
)
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2016
$
(1,627
)
 
$
(7
)
 
$
(1
)
 
$
(8
)
 
$
(2,135
)
 
$
(3,778
)
Amounts arising during the period
207

 
(30
)
 
—

 
—

 
(11
)
 
166

Reclassifications from AOCI
—

 
24

 
1

 
1

 
63

 
89

Net OCI during the period
207

 
(6
)
 
1

 
1

 
52

 
255

June 30, 2017
$
(1,420
)
 
$
(13
)
 
$
—

 
$
(7
)
 
$
(2,083
)
 
$
(3,523
)
 
 
 
 
 
 
 
 
 
 
 
 
March 31, 2016
$
(984
)
 
$
(5
)
 
$
—

 
$
(6
)
 
$
(2,164
)
 
$
(3,159
)
Amounts arising during the period
268

 
(85
)
 
—

 
—

 
2

 
185

Reclassifications from AOCI
—

 
85

 
(1
)
 
1

 
32

 
117

Net OCI during the period
268

 
—

 
(1
)
 
1

 
34

 
302

June 30, 2016
$
(716
)
 
$
(5
)
 
$
(1
)
 
$
(5
)
 
$
(2,130
)
 
$
(2,857
)
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2015
$
(520
)
 
$
(7
)
 
$
—

 
$
(6
)
 
$
(2,195
)
 
$
(2,728
)
Amounts arising during the period
(196
)
 
(5
)
 
—

 
—

 
2

 
(199
)
Reclassifications from AOCI
—

 
7

 
(1
)
 
1

 
63

 
70

Net OCI during the period
(196
)
 
2

 
(1
)
 
1

 
65

 
(129
)
June 30, 2016
$
(716
)
 
$
(5
)
 
$
(1
)
 
$
(5
)
 
$
(2,130
)
 
$
(2,857
)
 
 
 
 
 
 
 
 
 
 
 
 
LKE
 
 
 
 
 
 
 
 
 
 
 
March 31, 2017
 
 
 
 
$
—

 
$
(8
)
 
$
(60
)
 
$
(68
)
Amounts arising during the period
 
 
 
 
—

 
—

 
(11
)
 
(11
)
Reclassifications from AOCI
 
 
 
 
—

 
1

 
1

 
2

Net OCI during the period
 
 
 
 
—

 
1

 
(10
)
 
(9
)
June 30, 2017
 
 
 
 
$
—

 
$
(7
)
 
$
(70
)
 
$
(77
)
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2016
 
 
 
 
$
(1
)
 
$
(8
)
 
$
(61
)
 
$
(70
)
Amounts arising during the period
 
 
 
 
—

 
—

 
(11
)
 
(11
)
Reclassifications from AOCI
 
 
 
 
1

 
1

 
2

 
4

Net OCI during the period
 
 
 
 
1

 
1

 
(9
)
 
(7
)
June 30, 2017
 
 
 
 
$
—

 
$
(7
)
 
$
(70
)
 
$
(77
)
 
 
 
 
 
 
 
 
 
 
 
 
March 31, 2016
 
 
 
 
$
—

 
$
(10
)
 
$
(35
)
 
$
(45
)
Amounts arising during the period
 
 
 
 
—

 
—

 
1

 
1

Reclassifications from AOCI
 
 
 
 
(1
)
 
1

 
1

 
1

Net OCI during the period
 
 
 
 
(1
)
 
1

 
2

 
2

June 30, 2016
 
 
 
 
$
(1
)
 
$
(9
)
 
$
(33
)
 
$
(43
)
 
Foreign
currency
translation
adjustments
 
Unrealized gains (losses)
 on qualifying
derivatives
 
 
 
Defined benefit plans
 
 
 
 
 
Equity
investees'
AOCI
 
Prior
service
costs
 
Actuarial
gain
(loss)
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2015
 
 
 
 
$
—

 
$
(10
)
 
$
(36
)
 
$
(46
)
Amounts arising during the period
 
 
 
 
—

 
—

 
1

 
1

Reclassifications from AOCI
 
 
 
 
(1
)
 
1

 
2

 
2

Net OCI during the period
 
 
 
 
(1
)
 
1

 
3

 
3

June 30, 2016
 
 
 
 
$
(1
)
 
$
(9
)
 
$
(33
)
 
$
(43
)

 
(PPL)
 
The following table presents the gains (losses) and related income taxes for reclassifications from AOCI for the periods ended June 30. The defined benefit plan components of AOCI are not reflected in their entirety in the Statement of Income during the periods; rather, they are included in the computation of net periodic defined benefit costs (credits) and subject to capitalization. See Note 8 for additional information.
 
 
Three Months
 
Six Months
 
Affected Line Item on the
Details about AOCI
 
2017
 
2016
 
2017
 
2016
 
Statements of Income
Qualifying derivatives
 
 
 
 
 
 
 
 
 
 
Interest rate swaps
 
$
(2
)
 
$
(2
)
 
$
(5
)
 
$
(3
)
 
Interest Expense
Cross-currency swaps
 
(29
)
 
(103
)
 
(26
)
 
(6
)
 
Other Income (Expense) - net
 
 
(1
)
 
(1
)
 
—

 
—

 
Interest Expense
Total Pre-tax
 
(32
)
 
(106
)
 
(31
)
 
(9
)
 
 
Income Taxes
 
7

 
21

 
7

 
2

 
 
Total After-tax
 
(25
)
 
(85
)
 
(24
)
 
(7
)
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity investees' AOCI
 
(1
)
 
1

 
(1
)
 
1

 
Other Income (Expense) - net
Total Pre-tax
 
(1
)
 
1

 
(1
)
 
1

 
 
Income Taxes
 
—

 
—

 
—

 
—

 
 
Total After-tax
 
(1
)
 
1

 
(1
)
 
1

 
 
 
 
 
 
 
 
 
 
 
 
 
Defined benefit plans
 
 
 
 
 
 
 
 
 
 
Prior service costs
 
(1
)
 
(1
)
 
(1
)
 
(1
)
 
 
Net actuarial loss
 
(40
)
 
(40
)
 
(81
)
 
(80
)
 
 
Total Pre-tax
 
(41
)
 
(41
)
 
(82
)
 
(81
)
 
 
Income Taxes
 
9

 
8

 
18

 
17

 
 
Total After-tax
 
(32
)
 
(33
)
 
(64
)
 
(64
)
 
 
 
 
 
 
 
 
 
 
 
 
 
Total reclassifications during the period
 
$
(58
)
 
$
(117
)
 
$
(89
)
 
$
(70
)