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Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2015
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2015
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2014
$
1

 
$
(19
)
 
$
8

 
$
(93
)
 
$
(103
)
Change in Fair Value Recognized in AOCI
1

 
—

 
1

 
—

 
2

Amounts Reclassified from AOCI
(8
)
 
1

 
—

 
—

 
(7
)
Net Current Period Other Comprehensive Income (Loss)
(7
)
 
1

 
1

 
—

 
(5
)
Pension and OPEB Adjustment Related to Mitchell Plant
—

 
—

 
—

 
5

 
5

Balance in AOCI as of March 31, 2015
$
(6
)
 
$
(18
)
 
$
9

 
$
(88
)
 
$
(103
)

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2014
 
Cash Flow Hedges
 
 
 
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Securities
Available for Sale
 
Pension
and OPEB
 
Total
 
(in millions)
Balance in AOCI as of December 31, 2013
$
—

 
$
(23
)
 
$
7

 
$
(99
)
 
$
(115
)
Change in Fair Value Recognized in AOCI
(14
)
 
—

 
—

 
—

 
(14
)
Amounts Reclassified from AOCI
18

 
1

 
—

 
1

 
20

Net Current Period Other Comprehensive Income
4

 
1

 
—

 
1

 
6

Balance in AOCI as of March 31, 2014
$
4

 
$
(22
)
 
$
7

 
$
(98
)
 
$
(109
)
Reclassifications from Accumulated Other Comprehensive Income (Loss)
Reclassifications from Accumulated Other Comprehensive Income (Loss)
For the Three Months Ended March 31, 2015 and 2014
 
 
Amount of (Gain) Loss
Reclassified from AOCI
 
 
Three Months Ended March 31,
 
 
2015
 
2014
Gains and Losses on Cash Flow Hedges
 
(in millions)
Commodity:
 
 

 
 
Generation & Marketing Revenues
 
$
(13
)
 
$
—

Purchased Electricity for Resale
 
1

 
31

Regulatory Assets/(Liabilities), Net (a)
 
—

 
(3
)
Subtotal – Commodity
 
(12
)
 
28

 
 
 

 
 
Interest Rate and Foreign Currency:
 
 

 
 
Interest Expense
 
1

 
2

Subtotal – Interest Rate and Foreign Currency
 
1

 
2

 
 
 
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(11
)
 
30

Income Tax (Expense) Credit
 
(4
)
 
11

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(7
)
 
19

 
 
 
 
 
Pension and OPEB
 
 

 
 
Amortization of Prior Service Cost (Credit)
 
(5
)
 
(5
)
Amortization of Actuarial (Gains)/Losses
 
5

 
7

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

 
2

Income Tax (Expense) Credit
 
—

 
1

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

 
1

 
 
 

 
 
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
$
(7
)
 
$
20


(a)
Represents realized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the condensed balance sheets.
Appalachian Power Co [Member]  
Changes in Accumulated Other Comprehensive Income (Loss) by Component
APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2015
 
 
Cash Flow Hedges
 
 
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Pension
and OPEB
 
Total
 
 
(in thousands)
Balance in AOCI as of December 31, 2014
 
$
—

 
$
3,896

 
$
1,136

 
$
5,032

Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

 
—

Amounts Reclassified from AOCI
 
—

 
129

 
(458
)
 
(329
)
Net Current Period Other
Comprehensive Income (Loss)
 
—

 
129

 
(458
)
 
(329
)
Balance in AOCI as of March 31, 2015
 
$
—

 
$
4,025

 
$
678

 
$
4,703


APCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2014
 
 
Cash Flow Hedges
 
 
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Pension
and OPEB
 
Total
 
 
(in thousands)
Balance in AOCI as of December 31, 2013
 
$
94

 
$
3,090

 
$
(233
)
 
$
2,951

Change in Fair Value Recognized in AOCI
 
1,583

 
—

 
—

 
1,583

Amounts Reclassified from AOCI
 
(1,590
)
 
253

 
(333
)
 
(1,670
)
Net Current Period Other
Comprehensive Income (Loss)
 
(7
)
 
253

 
(333
)
 
(87
)
Balance in AOCI as of March 31, 2014
 
$
87

 
$
3,343

 
$
(566
)
 
$
2,864
Reclassifications from Accumulated Other Comprehensive Income (Loss)
(a)
Represents realized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the condensed balance sheets.
APCo

Reclassifications from Accumulated Other Comprehensive Income (Loss)
For the Three Months Ended March 31, 2015 and 2014
 
 
Amount of (Gain) Loss
Reclassified from AOCI
 
 
Three Months Ended March 31,
 
 
2015
 
2014
Gains and Losses on Cash Flow Hedges
 
(in thousands)
Commodity:
 
 

 
 
Purchased Electricity for Resale
 
$
—

 
$
(462
)
Other Operation Expense
 
—

 
(10
)
Maintenance Expense
 
—

 
(20
)
Property, Plant and Equipment
 
—

 
(17
)
Regulatory Assets/(Liabilities), Net (a)
 
—

 
(1,937
)
Subtotal – Commodity
 
—

 
(2,446
)
 
 
 

 
 
Interest Rate and Foreign Currency:
 
 

 
 
Interest Expense
 
199

 
390

Subtotal – Interest Rate and Foreign Currency
 
199

 
390

 
 
 
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
199

 
(2,056
)
Income Tax (Expense) Credit
 
70

 
(719
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
129

 
(1,337
)
 
 
 
 
 
Pension and OPEB
 
 

 
 
Amortization of Prior Service Cost (Credit)
 
(1,282
)
 
(1,282
)
Amortization of Actuarial (Gains)/Losses
 
578

 
770

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(704
)
 
(512
)
Income Tax (Expense) Credit
 
(246
)
 
(179
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(458
)
 
(333
)
 
 
 

 
 
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
$
(329
)
 
$
(1,670
)
Indiana Michigan Power Co [Member]  
Changes in Accumulated Other Comprehensive Income (Loss) by Component
I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2015
 
 
Cash Flow Hedges
 
 
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Pension
and OPEB
 
Total
 
 
(in thousands)
Balance in AOCI as of December 31, 2014
 
$
—

 
$
(14,406
)
 
$
46

 
$
(14,360
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

 
—

Amounts Reclassified from AOCI
 
—

 
267

 
12

 
279

Net Current Period Other
Comprehensive Income
 
—

 
267

 
12

 
279

Balance in AOCI as of March 31, 2015
 
$
—

 
$
(14,139
)
 
$
58

 
$
(14,081
)

I&M

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2014
 
 
Cash Flow Hedges
 
 
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Pension
and OPEB
 
Total
 
 
(in thousands)
Balance in AOCI as of December 31, 2013
 
$
46

 
$
(15,976
)
 
$
421

 
$
(15,509
)
Change in Fair Value Recognized in AOCI
 
1,062

 
—

 
—

 
1,062

Amounts Reclassified from AOCI
 
(1,047
)
 
410

 
43

 
(594
)
Net Current Period Other
Comprehensive Income
 
15

 
410

 
43

 
468

Balance in AOCI as of March 31, 2014
 
$
61

 
$
(15,566
)
 
$
464

 
$
(15,041
)
Reclassifications from Accumulated Other Comprehensive Income (Loss)
(a)
Represents realized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the condensed balance sheets.
I&M

Reclassifications from Accumulated Other Comprehensive Income (Loss)
For the Three Months Ended March 31, 2015 and 2014
 
 
Amount of (Gain) Loss
Reclassified from AOCI
 
 
Three Months Ended March 31,
 
 
2015
 
2014
Gains and Losses on Cash Flow Hedges
 
(in thousands)
Commodity:
 
 

 
 
Purchased Electricity for Resale
 
$
—

 
$
(717
)
Other Operation Expense
 
—

 
(7
)
Maintenance Expense
 
—

 
(7
)
Property, Plant and Equipment
 
—

 
(10
)
Regulatory Assets/(Liabilities), Net (a)
 
—

 
(870
)
Subtotal – Commodity
 
—

 
(1,611
)
 
 
 

 
 
Interest Rate and Foreign Currency:
 
 

 
 
Interest Expense
 
411

 
631

Subtotal – Interest Rate and Foreign Currency
 
411

 
631

 
 
 
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
411

 
(980
)
Income Tax (Expense) Credit
 
144

 
(343
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
267

 
(637
)
 
 
 
 
 
Pension and OPEB
 
 

 
 
Amortization of Prior Service Cost (Credit)
 
(199
)
 
(199
)
Amortization of Actuarial (Gains)/Losses
 
217

 
265

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
18

 
66

Income Tax (Expense) Credit
 
6

 
23

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
12

 
43

 
 
 

 
 
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
$
279

 
$
(594
)
Ohio Power Co [Member]  
Changes in Accumulated Other Comprehensive Income (Loss) by Component
OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2015
 
 
Cash Flow Hedges
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Total
 
 
(in thousands)
Balance in AOCI as of December 31, 2014
 
$
—

 
$
5,602

 
$
5,602

Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amounts Reclassified from AOCI
 
—

 
(343
)
 
(343
)
Net Current Period Other Comprehensive Loss
 
—

 
(343
)
 
(343
)
Balance in AOCI as of March 31, 2015
 
$
—

 
$
5,259

 
$
5,259

 
OPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2014
 
 
Cash Flow Hedges
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Total
 
 
(in thousands)
Balance in AOCI as of December 31, 2013
 
$
105

 
$
6,974

 
$
7,079

Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amounts Reclassified from AOCI
 
(105
)
 
(343
)
 
(448
)
Net Current Period Other Comprehensive Loss
 
(105
)
 
(343
)
 
(448
)
Balance in AOCI as of March 31, 2014
 
$
—

 
$
6,631

 
$
6,631
Reclassifications from Accumulated Other Comprehensive Income (Loss)
(a)
Represents realized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the condensed balance sheets.
OPCo

Reclassifications from Accumulated Other Comprehensive Income (Loss)
For the Three Months Ended March 31, 2015 and 2014
 
 
Amount of (Gain) Loss
Reclassified from AOCI
 
 
Three Months Ended March 31,
 
 
2015
 
2014
Gains and Losses on Cash Flow Hedges
 
(in thousands)
Commodity:
 
 

 
 
Other Operation Expense
 
$
—

 
$
(11
)
Maintenance Expense
 
—

 
(11
)
Property, Plant and Equipment
 
—

 
(18
)
Regulatory Assets/(Liabilities), Net (a)
 
—

 
(122
)
Subtotal – Commodity
 
—

 
(162
)
 
 
 

 
 
Interest Rate and Foreign Currency:
 
 

 
 
Depreciation and Amortization Expense
 
(3
)
 
(3
)
Interest Expense
 
(524
)
 
(524
)
Subtotal – Interest Rate and Foreign Currency
 
(527
)
 
(527
)
 
 
 
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(527
)
 
(689
)
Income Tax (Expense) Credit
 
(184
)
 
(241
)
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
$
(343
)
 
$
(448
)
Public Service Co Of Oklahoma [Member]  
Changes in Accumulated Other Comprehensive Income (Loss) by Component
PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2015
 
 
Cash Flow Hedges
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Total
 
 
(in thousands)
Balance in AOCI as of December 31, 2014
 
$
—

 
$
4,943

 
$
4,943

Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amounts Reclassified from AOCI
 
—

 
(190
)
 
(190
)
Net Current Period Other Comprehensive Loss
 
—

 
(190
)
 
(190
)
Balance in AOCI as of March 31, 2015
 
$
—

 
$
4,753

 
$
4,753

 
PSO

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2014
 
 
Cash Flow Hedges
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Total
 
 
(in thousands)
Balance in AOCI as of December 31, 2013
 
$
57

 
$
5,701

 
$
5,758

Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

Amounts Reclassified from AOCI
 
(57
)
 
(189
)
 
(246
)
Net Current Period Other Comprehensive Loss
 
(57
)
 
(189
)
 
(246
)
Balance in AOCI as of March 31, 2014
 
$
—

 
$
5,512

 
$
5,512
Reclassifications from Accumulated Other Comprehensive Income (Loss)
(a)
Represents realized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the condensed balance sheets.
PSO

Reclassifications from Accumulated Other Comprehensive Income (Loss)
For the Three Months Ended March 31, 2015 and 2014
 
 
Amount of (Gain) Loss
Reclassified from AOCI
 
 
Three Months Ended March 31,
 
 
2015
 
2014
Gains and Losses on Cash Flow Hedges
 
(in thousands)
Commodity:
 
 

 
 
Other Operation Expense
 
$
—

 
$
(8
)
Maintenance Expense
 
—

 
(9
)
Property, Plant and Equipment
 
—

 
(13
)
Regulatory Assets/(Liabilities), Net (a)
 
—

 
(58
)
Subtotal – Commodity
 
—

 
(88
)
 
 
 

 
 
Interest Rate and Foreign Currency:
 
 

 
 
Interest Expense
 
(292
)
 
(292
)
Subtotal – Interest Rate and Foreign Currency
 
(292
)
 
(292
)
 
 
 
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(292
)
 
(380
)
Income Tax (Expense) Credit
 
(102
)
 
(134
)
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
$
(190
)
 
$
(246
)
 
Southwestern Electric Power Co [Member]  
Changes in Accumulated Other Comprehensive Income (Loss) by Component
SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2015
 
 
Cash Flow Hedges
 
 
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Pension
and OPEB
 
Total
 
 
(in thousands)
Balance in AOCI as of December 31, 2014
 
$
—

 
$
(11,036
)
 
$
3,570

 
$
(7,466
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

 
—

Amounts Reclassified from AOCI
 
—

 
567

 
(240
)
 
327

Net Current Period Other
Comprehensive Income (Loss)
 
—

 
567

 
(240
)
 
327

Balance in AOCI as of March 31, 2015
 
$
—

 
$
(10,469
)
 
$
3,330

 
$
(7,139
)

SWEPCo

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended March 31, 2014
 
 
Cash Flow Hedges
 
 
 
 
 
 
Commodity
 
Interest Rate and
Foreign Currency
 
Pension
and OPEB
 
Total
 
 
(in thousands)
Balance in AOCI as of December 31, 2013
 
$
66

 
$
(13,304
)
 
$
4,794

 
$
(8,444
)
Change in Fair Value Recognized in AOCI
 
—

 
—

 
—

 
—

Amounts Reclassified from AOCI
 
(66
)
 
568

 
(234
)
 
268

Net Current Period Other
Comprehensive Income (Loss)
 
(66
)
 
568

 
(234
)
 
268

Balance in AOCI as of March 31, 2014
 
$
—

 
$
(12,736
)
 
$
4,560

 
$
(8,176
)
Reclassifications from Accumulated Other Comprehensive Income (Loss)
(a)
Represents realized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the condensed balance sheets.
SWEPCo

Reclassifications from Accumulated Other Comprehensive Income (Loss)
For the Three Months Ended March 31, 2015 and 2014
 
 
Amount of (Gain) Loss
Reclassified from AOCI
 
 
Three Months Ended March 31,
 
 
2015
 
2014
Gains and Losses on Cash Flow Hedges
 
(in thousands)
Commodity:
 
 

 
 
Other Operation Expense
 
$
—

 
$
(13
)
Maintenance Expense
 
—

 
(10
)
Property, Plant and Equipment
 
—

 
(11
)
Regulatory Assets/(Liabilities), Net (a)
 
—

 
(67
)
Subtotal – Commodity
 
—

 
(101
)
 
 
 

 
 
Interest Rate and Foreign Currency:
 
 

 
 
Interest Expense
 
872

 
872

Subtotal – Interest Rate and Foreign Currency
 
872

 
872

 
 
 
 
 
Reclassifications from AOCI, before Income Tax (Expense) Credit
 
872

 
771

Income Tax (Expense) Credit
 
305

 
269

Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
567

 
502

 
 
 
 
 
Pension and OPEB
 
 

 
 
Amortization of Prior Service Cost (Credit)
 
(467
)
 
(478
)
Amortization of Actuarial (Gains)/Losses
 
98

 
118

Reclassifications from AOCI, before Income Tax (Expense) Credit
 
(369
)
 
(360
)
Income Tax (Expense) Credit
 
(129
)
 
(126
)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
(240
)
 
(234
)
 
 
 

 
 
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit
 
$
327

 
$
268