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Comprehensive Income (Tables)
12 Months Ended
Dec. 31, 2017
Changes in Accumulated Other Comprehensive Income (Loss) by Component
AEP
 
 
 
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2017
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash Flow Hedges
 
 
 
Pension and OPEB
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Amortization of Deferred Costs
 
Changes in Funded Status
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2016
$
(23.1
)
 
$
(15.7
)
 
$
8.4

 
$
140.5

 
$
(266.4
)
 
$
(156.3
)
Change in Fair Value Recognized in AOCI
(20.4
)
 
1.6

 
3.5

 

 
86.5

 
71.2

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.6
)
 

 

 

 

 
(5.6
)
Purchased Electricity for Resale
28.8

 

 

 

 

 
28.8

Interest Expense

 
1.5

 

 

 

 
1.5

Amortization of Prior Service Cost (Credit)

 

 

 
(19.6
)
 

 
(19.6
)
Amortization of Actuarial (Gains)/Losses

 

 

 
21.3

 

 
21.3

Reclassifications from AOCI, before Income Tax (Expense) Credit
23.2

 
1.5

 

 
1.7

 

 
26.4

Income Tax (Expense) Credit
8.1

 
0.4

 

 
0.6

 

 
9.1

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
15.1

 
1.1

 

 
1.1

 

 
17.3

Net Current Period Other Comprehensive Income (Loss)
(5.3
)
 
2.7

 
3.5

 
1.1

 
86.5

 
88.5

Balance in AOCI as of December 31, 2017
$
(28.4
)
 
$
(13.0
)
 
$
11.9

 
$
141.6

 
$
(179.9
)
 
$
(67.8
)

AEP
 
 
 
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash Flow Hedges
 
 
 
Pension and OPEB
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Amortization of Deferred Costs
 
Changes in Funded Status
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2015
$
(5.2
)
 
$
(17.2
)
 
$
7.1

 
$
139.9

 
$
(251.7
)
 
$
(127.1
)
Change in Fair Value Recognized in AOCI
(14.6
)
 

 
1.3

 

 
(14.7
)
 
(28.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(21.4
)
 

 

 

 

 
(21.4
)
Purchased Electricity for Resale
16.4

 

 

 

 

 
16.4

Interest Expense

 
2.4

 

 

 

 
2.4

Amortization of Prior Service Cost (Credit)

 

 

 
(19.4
)
 

 
(19.4
)
Amortization of Actuarial (Gains)/Losses

 

 

 
20.3

 

 
20.3

Reclassifications from AOCI, before Income Tax (Expense) Credit
(5.0
)
 
2.4

 

 
0.9

 

 
(1.7
)
Income Tax (Expense) Credit
(1.7
)
 
0.9

 

 
0.3

 

 
(0.5
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(3.3
)
 
1.5

 

 
0.6

 

 
(1.2
)
Net Current Period Other Comprehensive Income (Loss)
(17.9
)
 
1.5

 
1.3

 
0.6

 
(14.7
)
 
(29.2
)
Balance in AOCI as of December 31, 2016
$
(23.1
)
 
$
(15.7
)
 
$
8.4

 
$
140.5

 
$
(266.4
)
 
$
(156.3
)

AEP
 
 
 
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash Flow Hedges
 
 
 
Pension and OPEB
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Amortization of Deferred Costs
 
Changes in Funded Status
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2014
$
1.6

 
$
(19.1
)
 
$
7.7

 
$
138.7

 
$
(232.0
)
 
$
(103.1
)
Change in Fair Value Recognized in AOCI
5.6

 

 
(0.6
)
 

 
(25.7
)
 
(20.7
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(48.1
)
 

 

 

 

 
(48.1
)
Purchased Electricity for Resale
29.1

 

 

 

 

 
29.1

Interest Expense

 
2.9

 

 

 

 
2.9

Amortization of Prior Service Cost (Credit)

 

 

 
(19.5
)
 

 
(19.5
)
Amortization of Actuarial (Gains)/Losses

 

 

 
21.3

 

 
21.3

Reclassifications from AOCI, before Income Tax (Expense) Credit
(19.0
)
 
2.9

 

 
1.8

 

 
(14.3
)
Income Tax (Expense) Credit
(6.6
)
 
1.0

 

 
0.6

 

 
(5.0
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(12.4
)
 
1.9

 

 
1.2

 

 
(9.3
)
Net Current Period Other Comprehensive Income (Loss)
(6.8
)
 
1.9

 
(0.6
)
 
1.2

 
(25.7
)
 
(30.0
)
Balance in AOCI as of Pension and OPEB Adjustment Related to Mitchell Plant

 

 

 

 
6.0

 
6.0

Balance in AOCI as of December 31, 2015
$
(5.2
)
 
$
(17.2
)
 
$
7.1

 
$
139.9

 
$
(251.7
)
 
$
(127.1
)

AEP Texas
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2017
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(5.4
)
 
$
4.2

 
$
(13.7
)
 
$
(14.9
)
Change in Fair Value Recognized in AOCI
 

 

 
1.1

 
1.1

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
1.3

 

 

 
1.3

Amortization of Prior Service Cost (Credit)
 

 
(0.1
)
 

 
(0.1
)
Amortization of Actuarial (Gains)/Losses
 

 
0.5

 

 
0.5

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.3

 
0.4

 

 
1.7

Income Tax (Expense) Credit
 
0.4

 
0.1

 

 
0.5

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.9

 
0.3

 

 
1.2

Net Current Period Other Comprehensive Income (Loss)
 
0.9

 
0.3

 
1.1

 
2.3

Balance in AOCI as of December 31, 2017
 
$
(4.5
)
 
$
4.5

 
$
(12.6
)
 
$
(12.6
)
AEP Texas
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(6.5
)
 
$
3.9

 
$
(14.6
)
 
$
(17.2
)
Change in Fair Value Recognized in AOCI
 
(0.1
)
 

 
0.9

 
0.8

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
1.8

 

 

 
1.8

Amortization of Prior Service Cost (Credit)
 

 
(0.1
)
 

 
(0.1
)
Amortization of Actuarial (Gains)/Losses
 

 
0.5

 

 
0.5

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.8

 
0.4

 

 
2.2

Income Tax (Expense) Credit
 
0.6

 
0.1

 

 
0.7

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
1.2

 
0.3

 

 
1.5

Net Current Period Other Comprehensive Income (Loss)
 
1.1

 
0.3

 
0.9

 
2.3

Balance in AOCI as of December 31, 2016
 
$
(5.4
)
 
$
4.2

 
$
(13.7
)
 
$
(14.9
)
AEP Texas
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2014
 
$
(7.7
)
 
$
3.6

 
$
(14.8
)
 
$
(18.9
)
Change in Fair Value Recognized in AOCI
 
(0.1
)
 

 
0.2

 
0.1

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
1.9

 

 

 
1.9

Amortization of Prior Service Cost (Credit)
 

 
(0.1
)
 

 
(0.1
)
Amortization of Actuarial (Gains)/Losses
 

 
0.6

 

 
0.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.9

 
0.5

 

 
2.4

Income Tax (Expense) Credit
 
0.6

 
0.2

 

 
0.8

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
1.3

 
0.3

 

 
1.6

Net Current Period Other Comprehensive Income (Loss)
 
1.2

 
0.3

 
0.2

 
1.7

Balance in AOCI as of December 31, 2015
 
$
(6.5
)
 
$
3.9

 
$
(14.6
)
 
$
(17.2
)
APCo
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2017
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
2.9

 
$
16.0

 
$
(27.3
)
 
$
(8.4
)
Change in Fair Value Recognized in AOCI
 

 

 
11.6

 
11.6

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
(1.1
)
 

 

 
(1.1
)
Amortization of Prior Service Cost (Credit)
 

 
(5.2
)
 

 
(5.2
)
Amortization of Actuarial (Gains)/Losses
 

 
3.4

 

 
3.4

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.1
)
 
(1.8
)
 

 
(2.9
)
Income Tax (Expense) Credit
 
(0.4
)
 
(0.6
)
 

 
(1.0
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.7
)
 
(1.2
)
 

 
(1.9
)
Net Current Period Other Comprehensive Income (Loss)
 
(0.7
)
 
(1.2
)
 
11.6

 
9.7

Balance in AOCI as of December 31, 2017
 
$
2.2

 
$
14.8

 
$
(15.7
)
 
$
1.3


APCo
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
3.6

 
$
17.4

 
$
(23.8
)
 
$
(2.8
)
Change in Fair Value Recognized in AOCI
 

 

 
(3.5
)
 
(3.5
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
(1.1
)
 

 

 
(1.1
)
Amortization of Prior Service Cost (Credit)
 

 
(5.1
)
 

 
(5.1
)
Amortization of Actuarial (Gains)/Losses
 

 
3.0

 

 
3.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.1
)
 
(2.1
)
 

 
(3.2
)
Income Tax (Expense) Credit
 
(0.4
)
 
(0.7
)
 

 
(1.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.7
)
 
(1.4
)
 

 
(2.1
)
Net Current Period Other Comprehensive Income (Loss)
 
(0.7
)
 
(1.4
)
 
(3.5
)
 
(5.6
)
Balance in AOCI as of December 31, 2016
 
$
2.9

 
$
16.0

 
$
(27.3
)
 
$
(8.4
)
APCo
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2014
 
$
3.9

 
$
19.2

 
$
(18.1
)
 
$
5.0

Change in Fair Value Recognized in AOCI
 

 

 
(5.7
)
 
(5.7
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
(0.4
)
 

 

 
(0.4
)
Amortization of Prior Service Cost (Credit)
 

 
(5.1
)
 

 
(5.1
)
Amortization of Actuarial (Gains)/Losses
 

 
2.3

 

 
2.3

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.4
)
 
(2.8
)
 

 
(3.2
)
Income Tax (Expense) Credit
 
(0.1
)
 
(1.0
)
 

 
(1.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.3
)
 
(1.8
)
 

 
(2.1
)
Net Current Period Other Comprehensive Income (Loss)
 
(0.3
)
 
(1.8
)
 
(5.7
)
 
(7.8
)
Balance in AOCI as of December 31, 2015
 
$
3.6

 
$
17.4

 
$
(23.8
)
 
$
(2.8
)

I&M
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2017
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(12.0
)
 
$
5.1

 
$
(9.3
)
 
$
(16.2
)
Change in Fair Value Recognized in AOCI
 

 

 
2.8

 
2.8

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
2.0

 

 

 
2.0

Amortization of Prior Service Cost (Credit)
 

 
(0.9
)
 

 
(0.9
)
Amortization of Actuarial (Gains)/Losses
 

 
0.9

 

 
0.9

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
2.0

 

 

 
2.0

Income Tax (Expense) Credit
 
0.7

 

 

 
0.7

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
1.3

 

 

 
1.3

Net Current Period Other Comprehensive Income (Loss)
 
1.3

 

 
2.8

 
4.1

Balance in AOCI as of December 31, 2017
 
$
(10.7
)
 
$
5.1

 
$
(6.5
)
 
$
(12.1
)
I&M
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(13.3
)
 
$
5.1

 
$
(8.5
)
 
$
(16.7
)
Change in Fair Value Recognized in AOCI
 

 

 
(0.8
)
 
(0.8
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
2.0

 

 

 
2.0

Amortization of Prior Service Cost (Credit)
 

 
(0.8
)
 

 
(0.8
)
Amortization of Actuarial (Gains)/Losses
 

 
0.8

 

 
0.8

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
2.0

 

 

 
2.0

Income Tax (Expense) Credit
 
0.7

 

 

 
0.7

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
1.3

 

 

 
1.3

Net Current Period Other Comprehensive Income (Loss)
 
1.3

 

 
(0.8
)
 
0.5

Balance in AOCI as of December 31, 2016
 
$
(12.0
)
 
$
5.1

 
$
(9.3
)
 
$
(16.2
)
I&M
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2014
 
$
(14.4
)
 
$
5.1

 
$
(5.0
)
 
$
(14.3
)
Change in Fair Value Recognized in AOCI
 

 

 
(3.5
)
 
(3.5
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
1.7

 

 

 
1.7

Amortization of Prior Service Cost (Credit)
 

 
(0.9
)
 

 
(0.9
)
Amortization of Actuarial (Gains)/Losses
 

 
0.9

 

 
0.9

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.7

 

 

 
1.7

Income Tax (Expense) Credit
 
0.6

 

 

 
0.6

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
1.1

 

 

 
1.1

Net Current Period Other Comprehensive Income (Loss)
 
1.1

 

 
(3.5
)
 
(2.4
)
Balance in AOCI as of December 31, 2015
 
$
(13.3
)
 
$
5.1

 
$
(8.5
)
 
$
(16.7
)

OPCo
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
 
 
For the Year Ended December 31, 2017
 
 
 
 
 
 
 
 
 
Cash Flow Hedge -
 
 
 
 
Interest Rate

 
 
 
 
(in millions)
 
 
Balance in AOCI as of December 31, 2016
 
$
3.0

 
 
Change in Fair Value Recognized in AOCI
 

 
 
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
Interest Expense
 
(1.7
)
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.7
)
 
 
Income Tax (Expense) Credit
 
(0.6
)
 
 
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(1.1
)
 
 
Net Current Period Other Comprehensive Income (Loss)
 
(1.1
)
 
 
Balance in AOCI as of December 31, 2017
 
$
1.9

 

OPCo
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
 
 
For the Year Ended December 31, 2016
 
 
 
 
 
 
 
 
 
Cash Flow Hedge -
 
 
 
 
Interest Rate

 
 
 
 
(in millions)
 
 
Balance in AOCI as of December 31, 2015
 
$
4.3

 
 
Change in Fair Value Recognized in AOCI
 

 
 
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
Interest Expense
 
(1.9
)
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.9
)
 
 
Income Tax (Expense) Credit
 
(0.6
)
 
 
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(1.3
)
 
 
Net Current Period Other Comprehensive Income (Loss)
 
(1.3
)
 
 
Balance in AOCI as of December 31, 2016
 
$
3.0

 
OPCo
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
 
 
For the Year Ended December 31, 2015
 
 
 
 
 
 
 
 
 
Cash Flow Hedge -
 
 
 
 
Interest Rate

 
 
 
 
(in millions)
 
 
Balance in AOCI as of December 31, 2014
 
$
5.6

 
 
Change in Fair Value Recognized in AOCI
 

 
 
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
Interest Expense
 
(2.0
)
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(2.0
)
 
 
Income Tax (Expense) Credit
 
(0.7
)
 
 
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(1.3
)
 
 
Net Current Period Other Comprehensive Income (Loss)
 
(1.3
)
 
 
Balance in AOCI as of December 31, 2015
 
$
4.3

 

PSO
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
 
 
For the Year Ended December 31, 2017
 
 
 
 
 
 
 
 
 
Cash Flow Hedge -
 
 
 
 
Interest Rate

 
 
 
 
(in millions)
 
 
Balance in AOCI as of December 31, 2016
 
$
3.4

 
 
Change in Fair Value Recognized in AOCI
 

 
 
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
Interest Expense
 
(1.3
)
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.3
)
 
 
Income Tax (Expense) Credit
 
(0.5
)
 
 
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.8
)
 
 
Net Current Period Other Comprehensive Income (Loss)
 
(0.8
)
 
 
Balance in AOCI as of December 31, 2017
 
$
2.6

 
PSO
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
 
 
For the Year Ended December 31, 2016
 
 
 
 
 
 
 
 
 
Cash Flow Hedge -
 
 
 
 
Interest Rate

 
 
 
 
(in millions)
 
 
Balance in AOCI as of December 31, 2015
 
$
4.2

 
 
Change in Fair Value Recognized in AOCI
 

 
 
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
Interest Expense
 
(1.2
)
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.2
)
 
 
Income Tax (Expense) Credit
 
(0.4
)
 
 
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.8
)
 
 
Net Current Period Other Comprehensive Income (Loss)
 
(0.8
)
 
 
Balance in AOCI as of December 31, 2016
 
$
3.4

 
PSO
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
 
 
For the Year Ended December 31, 2015
 
 
 
 
 
 
 
 
 
Cash Flow Hedge -
 
 
 
 
Interest Rate

 
 
 
 
(in millions)
 
 
Balance in AOCI as of December 31, 2014
 
$
5.0

 
 
Change in Fair Value Recognized in AOCI
 

 
 
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
Interest Expense
 
(1.2
)
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.2
)
 
 
Income Tax (Expense) Credit
 
(0.4
)
 
 
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.8
)
 
 
Net Current Period Other Comprehensive Income (Loss)
 
(0.8
)
 
 
Balance in AOCI as of December 31, 2015
 
$
4.2

 

SWEPCo
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2017
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(7.4
)
 
$
1.9

 
$
(3.9
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 

 

 
4.7

 
4.7

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
2.2

 

 

 
2.2

Amortization of Prior Service Cost (Credit)
 

 
(2.0
)
 

 
(2.0
)
Amortization of Actuarial (Gains)/Losses
 

 
0.9

 

 
0.9

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
2.2

 
(1.1
)
 

 
1.1

Income Tax (Expense) Credit
 
0.8

 
(0.4
)
 

 
0.4

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
1.4

 
(0.7
)
 

 
0.7

Net Current Period Other Comprehensive Income (Loss)
 
1.4

 
(0.7
)
 
4.7

 
5.4

Balance in AOCI as of December 31, 2017
 
$
(6.0
)
 
$
1.2

 
$
0.8

 
$
(4.0
)
SWEPCo
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(9.1
)
 
$
2.6

 
$
(2.9
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 

 

 
(1.0
)
 
(1.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
2.7

 

 

 
2.7

Amortization of Prior Service Cost (Credit)
 

 
(1.8
)
 

 
(1.8
)
Amortization of Actuarial (Gains)/Losses
 

 
0.7

 

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
2.7

 
(1.1
)
 

 
1.6

Income Tax (Expense) Credit
 
1.0

 
(0.4
)
 

 
0.6

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
1.7

 
(0.7
)
 

 
1.0

Net Current Period Other Comprehensive Income (Loss)
 
1.7

 
(0.7
)
 
(1.0
)
 

Balance in AOCI as of December 31, 2016
 
$
(7.4
)
 
$
1.9

 
$
(3.9
)
 
$
(9.4
)
SWEPCo
 
 
 
 
 
 
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Year Ended December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and OPEB
 
 
 
 
 
 
Amortization
 
Changes in
 
 
 
 
Cash Flow Hedge -
 
of Deferred
 
Funded
 
 
 
 
Interest Rate

 
Costs
 
Status
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2014
 
$
(11.1
)
 
$
3.6

 
$

 
$
(7.5
)
Change in Fair Value Recognized in AOCI
 

 

 
(2.9
)
 
(2.9
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
Interest Expense
 
3.1

 

 

 
3.1

Amortization of Prior Service Cost (Credit)
 

 
(1.9
)
 

 
(1.9
)
Amortization of Actuarial (Gains)/Losses
 

 
0.4

 

 
0.4

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
3.1

 
(1.5
)
 

 
1.6

Income Tax (Expense) Credit
 
1.1

 
(0.5
)
 

 
0.6

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
2.0

 
(1.0
)
 

 
1.0

Net Current Period Other Comprehensive Income (Loss)
 
2.0

 
(1.0
)
 
(2.9
)
 
(1.9
)
Balance in AOCI as of December 31, 2015
 
$
(9.1
)
 
$
2.6

 
$
(2.9
)
 
$
(9.4
)