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Comprehensive Income
 9 Months Ended
Sep. 30, 2017
Comprehensive Income
 COMPREHENSIVE INCOME

The disclosures in this note apply to all Registrants except for AEPTCo. AEPTCo does not have any components of other comprehensive income for any period presented in the condensed financial statements.

Presentation of Comprehensive Income

The following tables provide the components of changes in AOCI and details of reclassifications from AOCI for the three and nine months ended September 30, 2017 and 2016.  The amortization of pension and OPEB AOCI components are included in the computation of net periodic pension and OPEB costs. See Note 7 for additional details.

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2017
$
(36.0
)
 
$
(10.4
)
 
$
10.2

 
$
(125.4
)
 
$
(161.6
)
Change in Fair Value Recognized in AOCI
(15.8
)
 
(2.0
)
 
0.9

 
—

 
(16.9
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(0.9
)
 
—

 
—

 
—

 
(0.9
)
Purchased Electricity for Resale
4.9

 
—

 
—

 
—

 
4.9

Interest Expense
—

 
0.4

 
—

 
—

 
0.4

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(5.0
)
 
(5.0
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.4

 
5.4

Reclassifications from AOCI, before Income Tax (Expense) Credit
4.0

 
0.4

 
—

 
0.4

 
4.8

Income Tax (Expense) Credit
1.4

 
0.2

 
—

 
0.1

 
1.7

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
2.6

 
0.2

 
—

 
0.3

 
3.1

Net Current Period Other Comprehensive Income (Loss)
(13.2
)
 
(1.8
)
 
0.9

 
0.3

 
(13.8
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2016
$
1.9

 
$
(16.5
)
 
$
8.3

 
$
(111.6
)
 
$
(117.9
)
Change in Fair Value Recognized in AOCI
(26.7
)
 
—

 
0.5

 
—

 
(26.2
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.4
)
 
—

 
—

 
—

 
(5.4
)
Purchased Electricity for Resale
1.8

 
—

 
—

 
—

 
1.8

Interest Expense
—

 
0.6

 
—

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(4.8
)
 
(4.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.0

 
5.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
(3.6
)
 
0.6

 
—

 
0.2

 
(2.8
)
Income Tax (Expense) Credit
(1.3
)
 
0.2

 
—

 
—

 
(1.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(2.3
)
 
0.4

 
—

 
0.2

 
(1.7
)
Net Current Period Other Comprehensive Income (Loss)
(29.0
)
 
0.4

 
0.5

 
0.2

 
(27.9
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2016
$
(23.1
)
 
$
(15.7
)
 
$
8.4

 
$
(125.9
)
 
$
(156.3
)
Change in Fair Value Recognized in AOCI
(39.4
)
 
2.7

 
2.7

 
—

 
(34.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.6
)
 
—

 
—

 
—

 
(5.6
)
Purchased Electricity for Resale
26.0

 
—

 
—

 
—

 
26.0

Interest Expense
—

 
1.2

 
—

 
—

 
1.2

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.8
)
 
(14.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
16.0

 
16.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
20.4

 
1.2

 
—

 
1.2

 
22.8

Income Tax (Expense) Credit
7.1

 
0.4

 
—

 
0.4

 
7.9

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
13.3

 
0.8

 
—

 
0.8

 
14.9

Net Current Period Other Comprehensive Income (Loss)
(26.1
)
 
3.5

 
2.7

 
0.8

 
(19.1
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2015
$
(5.2
)
 
$
(17.2
)
 
$
7.1

 
$
(111.8
)
 
$
(127.1
)
Change in Fair Value Recognized in AOCI
(17.7
)
 
—

 
1.7

 
—

 
(16.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(20.7
)
 
—

 
—

 
—

 
(20.7
)
Purchased Electricity for Resale
14.2

 
—

 
—

 
—

 
14.2

Interest Expense
—

 
1.7

 
—

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.6
)
 
(14.6
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
15.2

 
15.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
(6.5
)
 
1.7

 
—

 
0.6

 
(4.2
)
Income Tax (Expense) Credit
(2.3
)
 
0.6

 
—

 
0.2

 
(1.5
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(4.2
)
 
1.1

 
—

 
0.4

 
(2.7
)
Net Current Period Other Comprehensive Income (Loss)
(21.9
)
 
1.1

 
1.7

 
0.4

 
(18.7
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

 
$
(11.9
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.9

 
0.9

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
(0.1
)
 
(0.2
)
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.1
)
 
(0.3
)
 
(0.4
)
Net Current Period Other Comprehensive Loss
 
(0.1
)
 
(0.3
)
 
(0.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.2

 
$
(7.1
)
 
$
(3.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.2
)
 
(1.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
—

 
(0.2
)
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
 
(0.3
)
 
(0.5
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
 
(0.3
)
 
(0.5
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
2.9

 
$
(11.3
)
 
$
(8.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(4.0
)
 
(4.0
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.6

 
2.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.4
)
 
(2.2
)
Income Tax (Expense) Credit
 
(0.3
)
 
(0.5
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.5
)
 
(0.9
)
 
(1.4
)
Net Current Period Other Comprehensive Loss
 
(0.5
)
 
(0.9
)
 
(1.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
3.6

 
$
(6.4
)
 
$
(2.8
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(3.8
)
 
(3.8
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.2

 
2.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.6
)
 
(2.4
)
Income Tax (Expense) Credit
 
(0.2
)
 
(0.6
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
 
(1.0
)
 
(1.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
 
(1.0
)
 
(1.6
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(11.3
)
 
$
(4.2
)
 
$
(15.5
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.3
)
 
(0.3
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.3

 
0.3

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(12.6
)
 
$
(3.4
)
 
$
(16.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.2
)
 
(0.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(12.0
)
 
$
(4.2
)
 
$
(16.2
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.7
)
 
(0.7
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(13.3
)
 
$
(3.4
)
 
$
(16.7
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.6
)
 
(0.6
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.5
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.5
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.3
)
Net Current Period Other Comprehensive Loss
 
(0.3
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.3


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.3
)
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 Loss
 
(0.8
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(1.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.4
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(1.0
)
Net Current Period Other Comprehensive Loss
 
(1.0
)
Balance in AOCI as of September 30, 2016
 
$
3.3



PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
3.0

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.4
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2017
 
$
2.8

 
PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.8

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.6


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.0
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.0
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2017
 
$
2.8


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(0.9
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.9
)
Income Tax (Expense) Credit
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2016
 
$
3.6



SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(6.7
)
 
$
(2.3
)
 
$
(9.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.6

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
 
—

 
(0.5
)
 
(0.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

Income Tax (Expense) Credit
 
0.2

 
(0.1
)
 
0.1

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.2
)
 
0.2

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.2
)
 
0.2

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(8.2
)
 
$
(0.7
)
 
$
(8.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.7

 
—

 
0.7

Amortization of Prior Service Cost (Credit)
 
—

 
(0.4
)
 
(0.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.7

 
(0.2
)
 
0.5

Income Tax (Expense) Credit
 
0.3

 
(0.1
)
 
0.2

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.1
)
 
0.3

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.1
)
 
0.3

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(7.4
)
 
$
(2.0
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
 
—

 
(1.5
)
 
(1.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

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

 
(0.8
)
 
0.9

Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

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

 
(0.5
)
 
0.6

Net Current Period Other Comprehensive Income (Loss)
 
1.1

 
(0.5
)
 
0.6

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(9.1
)
 
$
(0.3
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
2.0

Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

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

 
(0.8
)
 
1.2

Income Tax (Expense) Credit
 
0.7

 
(0.3
)
 
0.4

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

 
(0.5
)
 
0.8

Net Current Period Other Comprehensive Income (Loss)
 
1.3

 
(0.5
)
 
0.8

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)
Appalachian Power Co [Member]  
Comprehensive Income
 COMPREHENSIVE INCOME

The disclosures in this note apply to all Registrants except for AEPTCo. AEPTCo does not have any components of other comprehensive income for any period presented in the condensed financial statements.

Presentation of Comprehensive Income

The following tables provide the components of changes in AOCI and details of reclassifications from AOCI for the three and nine months ended September 30, 2017 and 2016.  The amortization of pension and OPEB AOCI components are included in the computation of net periodic pension and OPEB costs. See Note 7 for additional details.

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2017
$
(36.0
)
 
$
(10.4
)
 
$
10.2

 
$
(125.4
)
 
$
(161.6
)
Change in Fair Value Recognized in AOCI
(15.8
)
 
(2.0
)
 
0.9

 
—

 
(16.9
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(0.9
)
 
—

 
—

 
—

 
(0.9
)
Purchased Electricity for Resale
4.9

 
—

 
—

 
—

 
4.9

Interest Expense
—

 
0.4

 
—

 
—

 
0.4

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(5.0
)
 
(5.0
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.4

 
5.4

Reclassifications from AOCI, before Income Tax (Expense) Credit
4.0

 
0.4

 
—

 
0.4

 
4.8

Income Tax (Expense) Credit
1.4

 
0.2

 
—

 
0.1

 
1.7

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
2.6

 
0.2

 
—

 
0.3

 
3.1

Net Current Period Other Comprehensive Income (Loss)
(13.2
)
 
(1.8
)
 
0.9

 
0.3

 
(13.8
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2016
$
1.9

 
$
(16.5
)
 
$
8.3

 
$
(111.6
)
 
$
(117.9
)
Change in Fair Value Recognized in AOCI
(26.7
)
 
—

 
0.5

 
—

 
(26.2
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.4
)
 
—

 
—

 
—

 
(5.4
)
Purchased Electricity for Resale
1.8

 
—

 
—

 
—

 
1.8

Interest Expense
—

 
0.6

 
—

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(4.8
)
 
(4.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.0

 
5.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
(3.6
)
 
0.6

 
—

 
0.2

 
(2.8
)
Income Tax (Expense) Credit
(1.3
)
 
0.2

 
—

 
—

 
(1.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(2.3
)
 
0.4

 
—

 
0.2

 
(1.7
)
Net Current Period Other Comprehensive Income (Loss)
(29.0
)
 
0.4

 
0.5

 
0.2

 
(27.9
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2016
$
(23.1
)
 
$
(15.7
)
 
$
8.4

 
$
(125.9
)
 
$
(156.3
)
Change in Fair Value Recognized in AOCI
(39.4
)
 
2.7

 
2.7

 
—

 
(34.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.6
)
 
—

 
—

 
—

 
(5.6
)
Purchased Electricity for Resale
26.0

 
—

 
—

 
—

 
26.0

Interest Expense
—

 
1.2

 
—

 
—

 
1.2

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.8
)
 
(14.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
16.0

 
16.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
20.4

 
1.2

 
—

 
1.2

 
22.8

Income Tax (Expense) Credit
7.1

 
0.4

 
—

 
0.4

 
7.9

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
13.3

 
0.8

 
—

 
0.8

 
14.9

Net Current Period Other Comprehensive Income (Loss)
(26.1
)
 
3.5

 
2.7

 
0.8

 
(19.1
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2015
$
(5.2
)
 
$
(17.2
)
 
$
7.1

 
$
(111.8
)
 
$
(127.1
)
Change in Fair Value Recognized in AOCI
(17.7
)
 
—

 
1.7

 
—

 
(16.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(20.7
)
 
—

 
—

 
—

 
(20.7
)
Purchased Electricity for Resale
14.2

 
—

 
—

 
—

 
14.2

Interest Expense
—

 
1.7

 
—

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.6
)
 
(14.6
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
15.2

 
15.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
(6.5
)
 
1.7

 
—

 
0.6

 
(4.2
)
Income Tax (Expense) Credit
(2.3
)
 
0.6

 
—

 
0.2

 
(1.5
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(4.2
)
 
1.1

 
—

 
0.4

 
(2.7
)
Net Current Period Other Comprehensive Income (Loss)
(21.9
)
 
1.1

 
1.7

 
0.4

 
(18.7
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

 
$
(11.9
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.9

 
0.9

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
(0.1
)
 
(0.2
)
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.1
)
 
(0.3
)
 
(0.4
)
Net Current Period Other Comprehensive Loss
 
(0.1
)
 
(0.3
)
 
(0.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.2

 
$
(7.1
)
 
$
(3.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.2
)
 
(1.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
—

 
(0.2
)
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
 
(0.3
)
 
(0.5
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
 
(0.3
)
 
(0.5
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
2.9

 
$
(11.3
)
 
$
(8.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(4.0
)
 
(4.0
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.6

 
2.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.4
)
 
(2.2
)
Income Tax (Expense) Credit
 
(0.3
)
 
(0.5
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.5
)
 
(0.9
)
 
(1.4
)
Net Current Period Other Comprehensive Loss
 
(0.5
)
 
(0.9
)
 
(1.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
3.6

 
$
(6.4
)
 
$
(2.8
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(3.8
)
 
(3.8
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.2

 
2.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.6
)
 
(2.4
)
Income Tax (Expense) Credit
 
(0.2
)
 
(0.6
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
 
(1.0
)
 
(1.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
 
(1.0
)
 
(1.6
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(11.3
)
 
$
(4.2
)
 
$
(15.5
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.3
)
 
(0.3
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.3

 
0.3

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(12.6
)
 
$
(3.4
)
 
$
(16.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.2
)
 
(0.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(12.0
)
 
$
(4.2
)
 
$
(16.2
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.7
)
 
(0.7
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(13.3
)
 
$
(3.4
)
 
$
(16.7
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.6
)
 
(0.6
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.5
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.5
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.3
)
Net Current Period Other Comprehensive Loss
 
(0.3
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.3


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.3
)
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 Loss
 
(0.8
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(1.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.4
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(1.0
)
Net Current Period Other Comprehensive Loss
 
(1.0
)
Balance in AOCI as of September 30, 2016
 
$
3.3



PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
3.0

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.4
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2017
 
$
2.8

 
PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.8

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.6


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.0
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.0
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2017
 
$
2.8


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(0.9
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.9
)
Income Tax (Expense) Credit
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2016
 
$
3.6



SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(6.7
)
 
$
(2.3
)
 
$
(9.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.6

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
 
—

 
(0.5
)
 
(0.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

Income Tax (Expense) Credit
 
0.2

 
(0.1
)
 
0.1

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.2
)
 
0.2

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.2
)
 
0.2

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(8.2
)
 
$
(0.7
)
 
$
(8.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.7

 
—

 
0.7

Amortization of Prior Service Cost (Credit)
 
—

 
(0.4
)
 
(0.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.7

 
(0.2
)
 
0.5

Income Tax (Expense) Credit
 
0.3

 
(0.1
)
 
0.2

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.1
)
 
0.3

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.1
)
 
0.3

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(7.4
)
 
$
(2.0
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
 
—

 
(1.5
)
 
(1.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

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

 
(0.8
)
 
0.9

Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

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

 
(0.5
)
 
0.6

Net Current Period Other Comprehensive Income (Loss)
 
1.1

 
(0.5
)
 
0.6

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(9.1
)
 
$
(0.3
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
2.0

Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

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

 
(0.8
)
 
1.2

Income Tax (Expense) Credit
 
0.7

 
(0.3
)
 
0.4

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

 
(0.5
)
 
0.8

Net Current Period Other Comprehensive Income (Loss)
 
1.3

 
(0.5
)
 
0.8

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)
Indiana Michigan Power Co [Member]  
Comprehensive Income
 COMPREHENSIVE INCOME

The disclosures in this note apply to all Registrants except for AEPTCo. AEPTCo does not have any components of other comprehensive income for any period presented in the condensed financial statements.

Presentation of Comprehensive Income

The following tables provide the components of changes in AOCI and details of reclassifications from AOCI for the three and nine months ended September 30, 2017 and 2016.  The amortization of pension and OPEB AOCI components are included in the computation of net periodic pension and OPEB costs. See Note 7 for additional details.

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2017
$
(36.0
)
 
$
(10.4
)
 
$
10.2

 
$
(125.4
)
 
$
(161.6
)
Change in Fair Value Recognized in AOCI
(15.8
)
 
(2.0
)
 
0.9

 
—

 
(16.9
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(0.9
)
 
—

 
—

 
—

 
(0.9
)
Purchased Electricity for Resale
4.9

 
—

 
—

 
—

 
4.9

Interest Expense
—

 
0.4

 
—

 
—

 
0.4

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(5.0
)
 
(5.0
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.4

 
5.4

Reclassifications from AOCI, before Income Tax (Expense) Credit
4.0

 
0.4

 
—

 
0.4

 
4.8

Income Tax (Expense) Credit
1.4

 
0.2

 
—

 
0.1

 
1.7

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
2.6

 
0.2

 
—

 
0.3

 
3.1

Net Current Period Other Comprehensive Income (Loss)
(13.2
)
 
(1.8
)
 
0.9

 
0.3

 
(13.8
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2016
$
1.9

 
$
(16.5
)
 
$
8.3

 
$
(111.6
)
 
$
(117.9
)
Change in Fair Value Recognized in AOCI
(26.7
)
 
—

 
0.5

 
—

 
(26.2
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.4
)
 
—

 
—

 
—

 
(5.4
)
Purchased Electricity for Resale
1.8

 
—

 
—

 
—

 
1.8

Interest Expense
—

 
0.6

 
—

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(4.8
)
 
(4.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.0

 
5.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
(3.6
)
 
0.6

 
—

 
0.2

 
(2.8
)
Income Tax (Expense) Credit
(1.3
)
 
0.2

 
—

 
—

 
(1.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(2.3
)
 
0.4

 
—

 
0.2

 
(1.7
)
Net Current Period Other Comprehensive Income (Loss)
(29.0
)
 
0.4

 
0.5

 
0.2

 
(27.9
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2016
$
(23.1
)
 
$
(15.7
)
 
$
8.4

 
$
(125.9
)
 
$
(156.3
)
Change in Fair Value Recognized in AOCI
(39.4
)
 
2.7

 
2.7

 
—

 
(34.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.6
)
 
—

 
—

 
—

 
(5.6
)
Purchased Electricity for Resale
26.0

 
—

 
—

 
—

 
26.0

Interest Expense
—

 
1.2

 
—

 
—

 
1.2

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.8
)
 
(14.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
16.0

 
16.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
20.4

 
1.2

 
—

 
1.2

 
22.8

Income Tax (Expense) Credit
7.1

 
0.4

 
—

 
0.4

 
7.9

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
13.3

 
0.8

 
—

 
0.8

 
14.9

Net Current Period Other Comprehensive Income (Loss)
(26.1
)
 
3.5

 
2.7

 
0.8

 
(19.1
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2015
$
(5.2
)
 
$
(17.2
)
 
$
7.1

 
$
(111.8
)
 
$
(127.1
)
Change in Fair Value Recognized in AOCI
(17.7
)
 
—

 
1.7

 
—

 
(16.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(20.7
)
 
—

 
—

 
—

 
(20.7
)
Purchased Electricity for Resale
14.2

 
—

 
—

 
—

 
14.2

Interest Expense
—

 
1.7

 
—

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.6
)
 
(14.6
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
15.2

 
15.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
(6.5
)
 
1.7

 
—

 
0.6

 
(4.2
)
Income Tax (Expense) Credit
(2.3
)
 
0.6

 
—

 
0.2

 
(1.5
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(4.2
)
 
1.1

 
—

 
0.4

 
(2.7
)
Net Current Period Other Comprehensive Income (Loss)
(21.9
)
 
1.1

 
1.7

 
0.4

 
(18.7
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

 
$
(11.9
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.9

 
0.9

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
(0.1
)
 
(0.2
)
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.1
)
 
(0.3
)
 
(0.4
)
Net Current Period Other Comprehensive Loss
 
(0.1
)
 
(0.3
)
 
(0.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.2

 
$
(7.1
)
 
$
(3.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.2
)
 
(1.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
—

 
(0.2
)
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
 
(0.3
)
 
(0.5
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
 
(0.3
)
 
(0.5
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
2.9

 
$
(11.3
)
 
$
(8.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(4.0
)
 
(4.0
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.6

 
2.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.4
)
 
(2.2
)
Income Tax (Expense) Credit
 
(0.3
)
 
(0.5
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.5
)
 
(0.9
)
 
(1.4
)
Net Current Period Other Comprehensive Loss
 
(0.5
)
 
(0.9
)
 
(1.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
3.6

 
$
(6.4
)
 
$
(2.8
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(3.8
)
 
(3.8
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.2

 
2.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.6
)
 
(2.4
)
Income Tax (Expense) Credit
 
(0.2
)
 
(0.6
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
 
(1.0
)
 
(1.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
 
(1.0
)
 
(1.6
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(11.3
)
 
$
(4.2
)
 
$
(15.5
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.3
)
 
(0.3
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.3

 
0.3

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(12.6
)
 
$
(3.4
)
 
$
(16.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.2
)
 
(0.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(12.0
)
 
$
(4.2
)
 
$
(16.2
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.7
)
 
(0.7
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(13.3
)
 
$
(3.4
)
 
$
(16.7
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.6
)
 
(0.6
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.5
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.5
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.3
)
Net Current Period Other Comprehensive Loss
 
(0.3
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.3


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.3
)
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 Loss
 
(0.8
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(1.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.4
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(1.0
)
Net Current Period Other Comprehensive Loss
 
(1.0
)
Balance in AOCI as of September 30, 2016
 
$
3.3



PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
3.0

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.4
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2017
 
$
2.8

 
PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.8

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.6


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.0
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.0
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2017
 
$
2.8


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(0.9
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.9
)
Income Tax (Expense) Credit
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2016
 
$
3.6



SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(6.7
)
 
$
(2.3
)
 
$
(9.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.6

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
 
—

 
(0.5
)
 
(0.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

Income Tax (Expense) Credit
 
0.2

 
(0.1
)
 
0.1

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.2
)
 
0.2

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.2
)
 
0.2

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(8.2
)
 
$
(0.7
)
 
$
(8.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.7

 
—

 
0.7

Amortization of Prior Service Cost (Credit)
 
—

 
(0.4
)
 
(0.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.7

 
(0.2
)
 
0.5

Income Tax (Expense) Credit
 
0.3

 
(0.1
)
 
0.2

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.1
)
 
0.3

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.1
)
 
0.3

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(7.4
)
 
$
(2.0
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
 
—

 
(1.5
)
 
(1.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

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

 
(0.8
)
 
0.9

Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

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

 
(0.5
)
 
0.6

Net Current Period Other Comprehensive Income (Loss)
 
1.1

 
(0.5
)
 
0.6

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(9.1
)
 
$
(0.3
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
2.0

Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

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

 
(0.8
)
 
1.2

Income Tax (Expense) Credit
 
0.7

 
(0.3
)
 
0.4

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

 
(0.5
)
 
0.8

Net Current Period Other Comprehensive Income (Loss)
 
1.3

 
(0.5
)
 
0.8

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)
Ohio Power Co [Member]  
Comprehensive Income
 COMPREHENSIVE INCOME

The disclosures in this note apply to all Registrants except for AEPTCo. AEPTCo does not have any components of other comprehensive income for any period presented in the condensed financial statements.

Presentation of Comprehensive Income

The following tables provide the components of changes in AOCI and details of reclassifications from AOCI for the three and nine months ended September 30, 2017 and 2016.  The amortization of pension and OPEB AOCI components are included in the computation of net periodic pension and OPEB costs. See Note 7 for additional details.

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2017
$
(36.0
)
 
$
(10.4
)
 
$
10.2

 
$
(125.4
)
 
$
(161.6
)
Change in Fair Value Recognized in AOCI
(15.8
)
 
(2.0
)
 
0.9

 
—

 
(16.9
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(0.9
)
 
—

 
—

 
—

 
(0.9
)
Purchased Electricity for Resale
4.9

 
—

 
—

 
—

 
4.9

Interest Expense
—

 
0.4

 
—

 
—

 
0.4

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(5.0
)
 
(5.0
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.4

 
5.4

Reclassifications from AOCI, before Income Tax (Expense) Credit
4.0

 
0.4

 
—

 
0.4

 
4.8

Income Tax (Expense) Credit
1.4

 
0.2

 
—

 
0.1

 
1.7

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
2.6

 
0.2

 
—

 
0.3

 
3.1

Net Current Period Other Comprehensive Income (Loss)
(13.2
)
 
(1.8
)
 
0.9

 
0.3

 
(13.8
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2016
$
1.9

 
$
(16.5
)
 
$
8.3

 
$
(111.6
)
 
$
(117.9
)
Change in Fair Value Recognized in AOCI
(26.7
)
 
—

 
0.5

 
—

 
(26.2
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.4
)
 
—

 
—

 
—

 
(5.4
)
Purchased Electricity for Resale
1.8

 
—

 
—

 
—

 
1.8

Interest Expense
—

 
0.6

 
—

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(4.8
)
 
(4.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.0

 
5.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
(3.6
)
 
0.6

 
—

 
0.2

 
(2.8
)
Income Tax (Expense) Credit
(1.3
)
 
0.2

 
—

 
—

 
(1.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(2.3
)
 
0.4

 
—

 
0.2

 
(1.7
)
Net Current Period Other Comprehensive Income (Loss)
(29.0
)
 
0.4

 
0.5

 
0.2

 
(27.9
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2016
$
(23.1
)
 
$
(15.7
)
 
$
8.4

 
$
(125.9
)
 
$
(156.3
)
Change in Fair Value Recognized in AOCI
(39.4
)
 
2.7

 
2.7

 
—

 
(34.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.6
)
 
—

 
—

 
—

 
(5.6
)
Purchased Electricity for Resale
26.0

 
—

 
—

 
—

 
26.0

Interest Expense
—

 
1.2

 
—

 
—

 
1.2

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.8
)
 
(14.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
16.0

 
16.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
20.4

 
1.2

 
—

 
1.2

 
22.8

Income Tax (Expense) Credit
7.1

 
0.4

 
—

 
0.4

 
7.9

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
13.3

 
0.8

 
—

 
0.8

 
14.9

Net Current Period Other Comprehensive Income (Loss)
(26.1
)
 
3.5

 
2.7

 
0.8

 
(19.1
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2015
$
(5.2
)
 
$
(17.2
)
 
$
7.1

 
$
(111.8
)
 
$
(127.1
)
Change in Fair Value Recognized in AOCI
(17.7
)
 
—

 
1.7

 
—

 
(16.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(20.7
)
 
—

 
—

 
—

 
(20.7
)
Purchased Electricity for Resale
14.2

 
—

 
—

 
—

 
14.2

Interest Expense
—

 
1.7

 
—

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.6
)
 
(14.6
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
15.2

 
15.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
(6.5
)
 
1.7

 
—

 
0.6

 
(4.2
)
Income Tax (Expense) Credit
(2.3
)
 
0.6

 
—

 
0.2

 
(1.5
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(4.2
)
 
1.1

 
—

 
0.4

 
(2.7
)
Net Current Period Other Comprehensive Income (Loss)
(21.9
)
 
1.1

 
1.7

 
0.4

 
(18.7
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

 
$
(11.9
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.9

 
0.9

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
(0.1
)
 
(0.2
)
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.1
)
 
(0.3
)
 
(0.4
)
Net Current Period Other Comprehensive Loss
 
(0.1
)
 
(0.3
)
 
(0.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.2

 
$
(7.1
)
 
$
(3.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.2
)
 
(1.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
—

 
(0.2
)
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
 
(0.3
)
 
(0.5
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
 
(0.3
)
 
(0.5
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
2.9

 
$
(11.3
)
 
$
(8.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(4.0
)
 
(4.0
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.6

 
2.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.4
)
 
(2.2
)
Income Tax (Expense) Credit
 
(0.3
)
 
(0.5
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.5
)
 
(0.9
)
 
(1.4
)
Net Current Period Other Comprehensive Loss
 
(0.5
)
 
(0.9
)
 
(1.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
3.6

 
$
(6.4
)
 
$
(2.8
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(3.8
)
 
(3.8
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.2

 
2.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.6
)
 
(2.4
)
Income Tax (Expense) Credit
 
(0.2
)
 
(0.6
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
 
(1.0
)
 
(1.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
 
(1.0
)
 
(1.6
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(11.3
)
 
$
(4.2
)
 
$
(15.5
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.3
)
 
(0.3
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.3

 
0.3

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(12.6
)
 
$
(3.4
)
 
$
(16.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.2
)
 
(0.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(12.0
)
 
$
(4.2
)
 
$
(16.2
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.7
)
 
(0.7
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(13.3
)
 
$
(3.4
)
 
$
(16.7
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.6
)
 
(0.6
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.5
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.5
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.3
)
Net Current Period Other Comprehensive Loss
 
(0.3
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.3


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.3
)
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 Loss
 
(0.8
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(1.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.4
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(1.0
)
Net Current Period Other Comprehensive Loss
 
(1.0
)
Balance in AOCI as of September 30, 2016
 
$
3.3



PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
3.0

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.4
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2017
 
$
2.8

 
PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.8

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.6


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.0
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.0
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2017
 
$
2.8


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(0.9
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.9
)
Income Tax (Expense) Credit
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2016
 
$
3.6



SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(6.7
)
 
$
(2.3
)
 
$
(9.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.6

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
 
—

 
(0.5
)
 
(0.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

Income Tax (Expense) Credit
 
0.2

 
(0.1
)
 
0.1

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.2
)
 
0.2

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.2
)
 
0.2

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(8.2
)
 
$
(0.7
)
 
$
(8.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.7

 
—

 
0.7

Amortization of Prior Service Cost (Credit)
 
—

 
(0.4
)
 
(0.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.7

 
(0.2
)
 
0.5

Income Tax (Expense) Credit
 
0.3

 
(0.1
)
 
0.2

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.1
)
 
0.3

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.1
)
 
0.3

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(7.4
)
 
$
(2.0
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
 
—

 
(1.5
)
 
(1.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

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

 
(0.8
)
 
0.9

Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

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

 
(0.5
)
 
0.6

Net Current Period Other Comprehensive Income (Loss)
 
1.1

 
(0.5
)
 
0.6

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(9.1
)
 
$
(0.3
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
2.0

Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

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

 
(0.8
)
 
1.2

Income Tax (Expense) Credit
 
0.7

 
(0.3
)
 
0.4

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

 
(0.5
)
 
0.8

Net Current Period Other Comprehensive Income (Loss)
 
1.3

 
(0.5
)
 
0.8

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)
Public Service Co Of Oklahoma [Member]  
Comprehensive Income
 COMPREHENSIVE INCOME

The disclosures in this note apply to all Registrants except for AEPTCo. AEPTCo does not have any components of other comprehensive income for any period presented in the condensed financial statements.

Presentation of Comprehensive Income

The following tables provide the components of changes in AOCI and details of reclassifications from AOCI for the three and nine months ended September 30, 2017 and 2016.  The amortization of pension and OPEB AOCI components are included in the computation of net periodic pension and OPEB costs. See Note 7 for additional details.

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2017
$
(36.0
)
 
$
(10.4
)
 
$
10.2

 
$
(125.4
)
 
$
(161.6
)
Change in Fair Value Recognized in AOCI
(15.8
)
 
(2.0
)
 
0.9

 
—

 
(16.9
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(0.9
)
 
—

 
—

 
—

 
(0.9
)
Purchased Electricity for Resale
4.9

 
—

 
—

 
—

 
4.9

Interest Expense
—

 
0.4

 
—

 
—

 
0.4

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(5.0
)
 
(5.0
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.4

 
5.4

Reclassifications from AOCI, before Income Tax (Expense) Credit
4.0

 
0.4

 
—

 
0.4

 
4.8

Income Tax (Expense) Credit
1.4

 
0.2

 
—

 
0.1

 
1.7

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
2.6

 
0.2

 
—

 
0.3

 
3.1

Net Current Period Other Comprehensive Income (Loss)
(13.2
)
 
(1.8
)
 
0.9

 
0.3

 
(13.8
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2016
$
1.9

 
$
(16.5
)
 
$
8.3

 
$
(111.6
)
 
$
(117.9
)
Change in Fair Value Recognized in AOCI
(26.7
)
 
—

 
0.5

 
—

 
(26.2
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.4
)
 
—

 
—

 
—

 
(5.4
)
Purchased Electricity for Resale
1.8

 
—

 
—

 
—

 
1.8

Interest Expense
—

 
0.6

 
—

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(4.8
)
 
(4.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.0

 
5.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
(3.6
)
 
0.6

 
—

 
0.2

 
(2.8
)
Income Tax (Expense) Credit
(1.3
)
 
0.2

 
—

 
—

 
(1.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(2.3
)
 
0.4

 
—

 
0.2

 
(1.7
)
Net Current Period Other Comprehensive Income (Loss)
(29.0
)
 
0.4

 
0.5

 
0.2

 
(27.9
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2016
$
(23.1
)
 
$
(15.7
)
 
$
8.4

 
$
(125.9
)
 
$
(156.3
)
Change in Fair Value Recognized in AOCI
(39.4
)
 
2.7

 
2.7

 
—

 
(34.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.6
)
 
—

 
—

 
—

 
(5.6
)
Purchased Electricity for Resale
26.0

 
—

 
—

 
—

 
26.0

Interest Expense
—

 
1.2

 
—

 
—

 
1.2

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.8
)
 
(14.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
16.0

 
16.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
20.4

 
1.2

 
—

 
1.2

 
22.8

Income Tax (Expense) Credit
7.1

 
0.4

 
—

 
0.4

 
7.9

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
13.3

 
0.8

 
—

 
0.8

 
14.9

Net Current Period Other Comprehensive Income (Loss)
(26.1
)
 
3.5

 
2.7

 
0.8

 
(19.1
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2015
$
(5.2
)
 
$
(17.2
)
 
$
7.1

 
$
(111.8
)
 
$
(127.1
)
Change in Fair Value Recognized in AOCI
(17.7
)
 
—

 
1.7

 
—

 
(16.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(20.7
)
 
—

 
—

 
—

 
(20.7
)
Purchased Electricity for Resale
14.2

 
—

 
—

 
—

 
14.2

Interest Expense
—

 
1.7

 
—

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.6
)
 
(14.6
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
15.2

 
15.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
(6.5
)
 
1.7

 
—

 
0.6

 
(4.2
)
Income Tax (Expense) Credit
(2.3
)
 
0.6

 
—

 
0.2

 
(1.5
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(4.2
)
 
1.1

 
—

 
0.4

 
(2.7
)
Net Current Period Other Comprehensive Income (Loss)
(21.9
)
 
1.1

 
1.7

 
0.4

 
(18.7
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

 
$
(11.9
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.9

 
0.9

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
(0.1
)
 
(0.2
)
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.1
)
 
(0.3
)
 
(0.4
)
Net Current Period Other Comprehensive Loss
 
(0.1
)
 
(0.3
)
 
(0.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.2

 
$
(7.1
)
 
$
(3.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.2
)
 
(1.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
—

 
(0.2
)
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
 
(0.3
)
 
(0.5
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
 
(0.3
)
 
(0.5
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
2.9

 
$
(11.3
)
 
$
(8.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(4.0
)
 
(4.0
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.6

 
2.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.4
)
 
(2.2
)
Income Tax (Expense) Credit
 
(0.3
)
 
(0.5
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.5
)
 
(0.9
)
 
(1.4
)
Net Current Period Other Comprehensive Loss
 
(0.5
)
 
(0.9
)
 
(1.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
3.6

 
$
(6.4
)
 
$
(2.8
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(3.8
)
 
(3.8
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.2

 
2.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.6
)
 
(2.4
)
Income Tax (Expense) Credit
 
(0.2
)
 
(0.6
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
 
(1.0
)
 
(1.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
 
(1.0
)
 
(1.6
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(11.3
)
 
$
(4.2
)
 
$
(15.5
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.3
)
 
(0.3
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.3

 
0.3

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(12.6
)
 
$
(3.4
)
 
$
(16.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.2
)
 
(0.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(12.0
)
 
$
(4.2
)
 
$
(16.2
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.7
)
 
(0.7
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(13.3
)
 
$
(3.4
)
 
$
(16.7
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.6
)
 
(0.6
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.5
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.5
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.3
)
Net Current Period Other Comprehensive Loss
 
(0.3
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.3


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.3
)
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 Loss
 
(0.8
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(1.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.4
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(1.0
)
Net Current Period Other Comprehensive Loss
 
(1.0
)
Balance in AOCI as of September 30, 2016
 
$
3.3



PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
3.0

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.4
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2017
 
$
2.8

 
PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.8

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.6


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.0
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.0
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2017
 
$
2.8


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(0.9
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.9
)
Income Tax (Expense) Credit
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2016
 
$
3.6



SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(6.7
)
 
$
(2.3
)
 
$
(9.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.6

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
 
—

 
(0.5
)
 
(0.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

Income Tax (Expense) Credit
 
0.2

 
(0.1
)
 
0.1

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.2
)
 
0.2

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.2
)
 
0.2

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(8.2
)
 
$
(0.7
)
 
$
(8.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.7

 
—

 
0.7

Amortization of Prior Service Cost (Credit)
 
—

 
(0.4
)
 
(0.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.7

 
(0.2
)
 
0.5

Income Tax (Expense) Credit
 
0.3

 
(0.1
)
 
0.2

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.1
)
 
0.3

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.1
)
 
0.3

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(7.4
)
 
$
(2.0
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
 
—

 
(1.5
)
 
(1.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

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

 
(0.8
)
 
0.9

Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

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

 
(0.5
)
 
0.6

Net Current Period Other Comprehensive Income (Loss)
 
1.1

 
(0.5
)
 
0.6

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(9.1
)
 
$
(0.3
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
2.0

Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

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

 
(0.8
)
 
1.2

Income Tax (Expense) Credit
 
0.7

 
(0.3
)
 
0.4

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

 
(0.5
)
 
0.8

Net Current Period Other Comprehensive Income (Loss)
 
1.3

 
(0.5
)
 
0.8

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)
Southwestern Electric Power Co [Member]  
Comprehensive Income
 COMPREHENSIVE INCOME

The disclosures in this note apply to all Registrants except for AEPTCo. AEPTCo does not have any components of other comprehensive income for any period presented in the condensed financial statements.

Presentation of Comprehensive Income

The following tables provide the components of changes in AOCI and details of reclassifications from AOCI for the three and nine months ended September 30, 2017 and 2016.  The amortization of pension and OPEB AOCI components are included in the computation of net periodic pension and OPEB costs. See Note 7 for additional details.

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2017
$
(36.0
)
 
$
(10.4
)
 
$
10.2

 
$
(125.4
)
 
$
(161.6
)
Change in Fair Value Recognized in AOCI
(15.8
)
 
(2.0
)
 
0.9

 
—

 
(16.9
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(0.9
)
 
—

 
—

 
—

 
(0.9
)
Purchased Electricity for Resale
4.9

 
—

 
—

 
—

 
4.9

Interest Expense
—

 
0.4

 
—

 
—

 
0.4

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(5.0
)
 
(5.0
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.4

 
5.4

Reclassifications from AOCI, before Income Tax (Expense) Credit
4.0

 
0.4

 
—

 
0.4

 
4.8

Income Tax (Expense) Credit
1.4

 
0.2

 
—

 
0.1

 
1.7

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
2.6

 
0.2

 
—

 
0.3

 
3.1

Net Current Period Other Comprehensive Income (Loss)
(13.2
)
 
(1.8
)
 
0.9

 
0.3

 
(13.8
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of June 30, 2016
$
1.9

 
$
(16.5
)
 
$
8.3

 
$
(111.6
)
 
$
(117.9
)
Change in Fair Value Recognized in AOCI
(26.7
)
 
—

 
0.5

 
—

 
(26.2
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.4
)
 
—

 
—

 
—

 
(5.4
)
Purchased Electricity for Resale
1.8

 
—

 
—

 
—

 
1.8

Interest Expense
—

 
0.6

 
—

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(4.8
)
 
(4.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
5.0

 
5.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
(3.6
)
 
0.6

 
—

 
0.2

 
(2.8
)
Income Tax (Expense) Credit
(1.3
)
 
0.2

 
—

 
—

 
(1.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(2.3
)
 
0.4

 
—

 
0.2

 
(1.7
)
Net Current Period Other Comprehensive Income (Loss)
(29.0
)
 
0.4

 
0.5

 
0.2

 
(27.9
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2016
$
(23.1
)
 
$
(15.7
)
 
$
8.4

 
$
(125.9
)
 
$
(156.3
)
Change in Fair Value Recognized in AOCI
(39.4
)
 
2.7

 
2.7

 
—

 
(34.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(5.6
)
 
—

 
—

 
—

 
(5.6
)
Purchased Electricity for Resale
26.0

 
—

 
—

 
—

 
26.0

Interest Expense
—

 
1.2

 
—

 
—

 
1.2

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.8
)
 
(14.8
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
16.0

 
16.0

Reclassifications from AOCI, before Income Tax (Expense) Credit
20.4

 
1.2

 
—

 
1.2

 
22.8

Income Tax (Expense) Credit
7.1

 
0.4

 
—

 
0.4

 
7.9

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
13.3

 
0.8

 
—

 
0.8

 
14.9

Net Current Period Other Comprehensive Income (Loss)
(26.1
)
 
3.5

 
2.7

 
0.8

 
(19.1
)
Balance in AOCI as of September 30, 2017
$
(49.2
)
 
$
(12.2
)
 
$
11.1

 
$
(125.1
)
 
$
(175.4
)

AEP

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2015
$
(5.2
)
 
$
(17.2
)
 
$
7.1

 
$
(111.8
)
 
$
(127.1
)
Change in Fair Value Recognized in AOCI
(17.7
)
 
—

 
1.7

 
—

 
(16.0
)
Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
 
 
 
Generation & Marketing Revenues
(20.7
)
 
—

 
—

 
—

 
(20.7
)
Purchased Electricity for Resale
14.2

 
—

 
—

 
—

 
14.2

Interest Expense
—

 
1.7

 
—

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
—

 
—

 
—

 
(14.6
)
 
(14.6
)
Amortization of Actuarial (Gains)/Losses
—

 
—

 
—

 
15.2

 
15.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
(6.5
)
 
1.7

 
—

 
0.6

 
(4.2
)
Income Tax (Expense) Credit
(2.3
)
 
0.6

 
—

 
0.2

 
(1.5
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
(4.2
)
 
1.1

 
—

 
0.4

 
(2.7
)
Net Current Period Other Comprehensive Income (Loss)
(21.9
)
 
1.1

 
1.7

 
0.4

 
(18.7
)
Balance in AOCI as of September 30, 2016
$
(27.1
)
 
$
(16.1
)
 
$
8.8

 
$
(111.4
)
 
$
(145.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

 
$
(11.9
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.9

 
0.9

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
(0.1
)
 
(0.2
)
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.1
)
 
(0.3
)
 
(0.4
)
Net Current Period Other Comprehensive Loss
 
(0.1
)
 
(0.3
)
 
(0.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.2

 
$
(7.1
)
 
$
(3.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
(0.2
)
 
—

 
(0.2
)
Amortization of Prior Service Cost (Credit)
 
—

 
(1.2
)
 
(1.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.2
)
 
(0.5
)
 
(0.7
)
Income Tax (Expense) Credit
 
—

 
(0.2
)
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
 
(0.3
)
 
(0.5
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
 
(0.3
)
 
(0.5
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
2.9

 
$
(11.3
)
 
$
(8.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(4.0
)
 
(4.0
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.6

 
2.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.4
)
 
(2.2
)
Income Tax (Expense) Credit
 
(0.3
)
 
(0.5
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.5
)
 
(0.9
)
 
(1.4
)
Net Current Period Other Comprehensive Loss
 
(0.5
)
 
(0.9
)
 
(1.4
)
Balance in AOCI as of September 30, 2017
 
$
2.4

 
$
(12.2
)
 
$
(9.8
)

APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
3.6

 
$
(6.4
)
 
$
(2.8
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
(0.8
)
Amortization of Prior Service Cost (Credit)
 
—

 
(3.8
)
 
(3.8
)
Amortization of Actuarial (Gains)/Losses
 
—

 
2.2

 
2.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.8
)
 
(1.6
)
 
(2.4
)
Income Tax (Expense) Credit
 
(0.2
)
 
(0.6
)
 
(0.8
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
 
(1.0
)
 
(1.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
 
(1.0
)
 
(1.6
)
Balance in AOCI as of September 30, 2016
 
$
3.0

 
$
(7.4
)
 
$
(4.4
)


I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(11.3
)
 
$
(4.2
)
 
$
(15.5
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.3
)
 
(0.3
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.3

 
0.3

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(12.6
)
 
$
(3.4
)
 
$
(16.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.5

 
—

 
0.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.2
)
 
(0.2
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

Income Tax (Expense) Credit
 
0.2

 
—

 
0.2

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

 
—

 
0.3

Net Current Period Other Comprehensive Income
 
0.3

 
—

 
0.3

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(12.0
)
 
$
(4.2
)
 
$
(16.2
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.7
)
 
(0.7
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2017
 
$
(11.0
)
 
$
(4.2
)
 
$
(15.2
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(13.3
)
 
$
(3.4
)
 
$
(16.7
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
1.5

 
—

 
1.5

Amortization of Prior Service Cost (Credit)
 
—

 
(0.6
)
 
(0.6
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
1.5

 
—

 
1.5

Income Tax (Expense) Credit
 
0.5

 
—

 
0.5

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

 
—

 
1.0

Net Current Period Other Comprehensive Income
 
1.0

 
—

 
1.0

Balance in AOCI as of September 30, 2016
 
$
(12.3
)
 
$
(3.4
)
 
$
(15.7
)


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
2.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.5
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.5
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.3
)
Net Current Period Other Comprehensive Loss
 
(0.3
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.5

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.3


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.3
)
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 Loss
 
(0.8
)
Balance in AOCI as of September 30, 2017
 
$
2.2


OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(1.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.4
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(1.0
)
Net Current Period Other Comprehensive Loss
 
(1.0
)
Balance in AOCI as of September 30, 2016
 
$
3.3



PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
3.0

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.4
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.4
)
Income Tax (Expense) Credit
 
(0.2
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2017
 
$
2.8

 
PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
Interest Rate
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
3.8

Change in Fair Value Recognized in AOCI
 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
Interest Expense
 
(0.3
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.3
)
Income Tax (Expense) Credit
 
(0.1
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.2
)
Net Current Period Other Comprehensive Loss
 
(0.2
)
Balance in AOCI as of September 30, 2016
 
$
3.6


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
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
 
(1.0
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(1.0
)
Income Tax (Expense) Credit
 
(0.4
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2017
 
$
2.8


PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
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
 
(0.9
)
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(0.9
)
Income Tax (Expense) Credit
 
(0.3
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(0.6
)
Net Current Period Other Comprehensive Loss
 
(0.6
)
Balance in AOCI as of September 30, 2016
 
$
3.6



SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2017
 
$
(6.7
)
 
$
(2.3
)
 
$
(9.0
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.6

 
—

 
0.6

Amortization of Prior Service Cost (Credit)
 
—

 
(0.5
)
 
(0.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

Income Tax (Expense) Credit
 
0.2

 
(0.1
)
 
0.1

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.2
)
 
0.2

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.2
)
 
0.2

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of June 30, 2016
 
$
(8.2
)
 
$
(0.7
)
 
$
(8.9
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amount of (Gain) Loss Reclassified from AOCI
 
 
 
 
 
 
Interest Expense
 
0.7

 
—

 
0.7

Amortization of Prior Service Cost (Credit)
 
—

 
(0.4
)
 
(0.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.2

 
0.2

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
0.7

 
(0.2
)
 
0.5

Income Tax (Expense) Credit
 
0.3

 
(0.1
)
 
0.2

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
0.4

 
(0.1
)
 
0.3

Net Current Period Other Comprehensive Income (Loss)
 
0.4

 
(0.1
)
 
0.3

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2017
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2016
 
$
(7.4
)
 
$
(2.0
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
1.7

Amortization of Prior Service Cost (Credit)
 
—

 
(1.5
)
 
(1.5
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.7

 
0.7

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

 
(0.8
)
 
0.9

Income Tax (Expense) Credit
 
0.6

 
(0.3
)
 
0.3

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

 
(0.5
)
 
0.6

Net Current Period Other Comprehensive Income (Loss)
 
1.1

 
(0.5
)
 
0.6

Balance in AOCI as of September 30, 2017
 
$
(6.3
)
 
$
(2.5
)
 
$
(8.8
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Nine Months Ended September 30, 2016
 
 
Cash Flow Hedges
 
 
 
 
 
 
Interest Rate
 
Pension
and OPEB
 
Total
 
 
(in millions)
Balance in AOCI as of December 31, 2015
 
$
(9.1
)
 
$
(0.3
)
 
$
(9.4
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

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

 
—

 
2.0

Amortization of Prior Service Cost (Credit)
 
—

 
(1.4
)
 
(1.4
)
Amortization of Actuarial (Gains)/Losses
 
—

 
0.6

 
0.6

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

 
(0.8
)
 
1.2

Income Tax (Expense) Credit
 
0.7

 
(0.3
)
 
0.4

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

 
(0.5
)
 
0.8

Net Current Period Other Comprehensive Income (Loss)
 
1.3

 
(0.5
)
 
0.8

Balance in AOCI as of September 30, 2016
 
$
(7.8
)
 
$
(0.8
)
 
$
(8.6
)