Derivatives and Hedging (Details) gal in Millions, T in Millions, MWh in Millions, MMBTU in Millions |
12 Months Ended |
Dec. 31, 2017
USD ($)
MWh
MMBTU
T
gal
|
Dec. 31, 2016
USD ($)
MWh
MMBTU
T
gal
|
Dec. 31, 2015
USD ($)
|
Cash Collateral Netting |
|
|
|
|
|
|
Cash Collateral Received Netted Against Risk Management Assets |
|
$ 9,400,000.0
|
|
$ 7,900,000.0
|
|
|
Cash Collateral Paid Netted Against Risk Management Liabilities |
|
9,000,000
|
|
7,600,000.0
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
|
126,200,000
|
|
94,500,000
|
|
|
Long-term Risk Management Assets |
|
282,100,000
|
|
289,100,000
|
|
|
Total Assets |
|
408,300,000
|
|
383,600,000
|
|
|
Current Risk Management Liabilities |
|
61,600,000
|
|
53,400,000
|
|
|
Long-term Risk Management Liabilities |
|
322,000,000
|
|
316,200,000
|
|
|
Total Liabilities |
|
383,600,000
|
|
369,600,000
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
136,000,000
|
|
28,400,000
|
|
$ 86,400,000
|
Collateral Triggering Events [Abstract] |
|
|
|
|
|
|
Liabilities for Contracts with Cross Default Provisions Prior to Contractural Netting Arrangements |
|
243,600,000
|
|
259,600,000
|
|
|
Amount of Cash Collateral Posted |
|
1,300,000
|
|
400,000
|
|
|
Additional Settlement Liability if Cross Default Provision is Triggered |
|
$ 223,100,000
|
|
235,800,000
|
|
|
Derivatives and Hedging (Textuals) [Abstract] |
|
|
|
|
|
|
Maximum Length of Time Hedged in Price Risk Cash Flow Hedge |
|
120 months
|
|
|
|
|
AEP Texas Inc. [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
|
$ 500,000
|
|
200,000
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
400,000
|
|
400,000
|
|
(1,100,000)
|
Appalachian Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
|
24,900,000
|
|
2,600,000
|
|
|
Long-term Risk Management Assets |
|
1,100,000
|
|
0
|
|
|
Current Risk Management Liabilities |
|
1,300,000
|
|
300,000
|
|
|
Long-term Risk Management Liabilities |
|
200,000
|
|
900,000
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
43,200,000
|
|
56,500,000
|
|
36,500,000
|
Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
|
7,600,000
|
|
3,500,000
|
|
|
Long-term Risk Management Assets |
|
700,000
|
|
0
|
|
|
Current Risk Management Liabilities |
|
3,500,000
|
|
300,000
|
|
|
Long-term Risk Management Liabilities |
|
100,000
|
|
800,000
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
14,600,000
|
|
27,000,000
|
|
15,900,000
|
Ohio Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
|
600,000
|
|
200,000
|
|
|
Current Risk Management Liabilities |
|
6,400,000
|
|
5,900,000
|
|
|
Long-term Risk Management Liabilities |
|
126,000,000
|
|
113,100,000
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
(21,800,000)
|
|
(143,500,000)
|
|
(30,100,000)
|
Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
|
6,400,000
|
|
800,000
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
25,000,000
|
|
6,600,000
|
|
4,200,000
|
Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
|
6,400,000
|
|
900,000
|
|
|
Current Risk Management Liabilities |
|
200,000
|
|
300,000
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
24,900,000
|
|
20,400,000
|
|
9,900,000
|
Risk Management Contracts [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Total Assets |
[1] |
383,800,000
|
[2] |
372,400,000
|
[3] |
|
Total Liabilities |
[1] |
309,500,000
|
[2] |
321,500,000
|
[3] |
|
Risk Management Contracts [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Total Assets |
[1] |
500,000
|
|
200,000
|
|
|
Risk Management Contracts [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Total Assets |
[1],[4] |
26,000,000
|
|
2,600,000
|
|
|
Total Liabilities |
[1],[4] |
1,500,000
|
|
1,200,000
|
|
|
Risk Management Contracts [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Total Assets |
[1],[4] |
8,300,000
|
|
3,500,000
|
|
|
Total Liabilities |
[1],[4] |
3,600,000
|
|
1,100,000
|
|
|
Risk Management Contracts [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Total Assets |
[1],[4] |
600,000
|
|
200,000
|
|
|
Total Liabilities |
[1],[4] |
132,400,000
|
|
119,000,000
|
|
|
Risk Management Contracts [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Total Assets |
[1],[4] |
6,400,000
|
|
800,000
|
|
|
Total Liabilities |
[1],[4] |
0
|
|
|
|
|
Risk Management Contracts [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Total Assets |
[1],[4] |
6,400,000
|
|
900,000
|
|
|
Total Liabilities |
[1],[4] |
200,000
|
|
300,000
|
|
|
Commodity [Member] |
|
|
|
|
|
|
Impact of Cash Flow Hedges on the Balance Sheet |
|
|
|
|
|
|
Hedging Assets |
[5] |
22,000,000
|
|
11,200,000
|
|
|
Hedging Liabilities |
[5] |
65,500,000
|
|
46,700,000
|
|
|
AOCI Gain (Loss) Net of Tax |
|
(28,400,000)
|
|
(23,100,000)
|
|
|
Portion Expected to be Reclassified to Net Income During the Next Twelve Months |
|
5,500,000
|
|
4,300,000
|
|
|
Derivatives and Hedging (Textuals) [Abstract] |
|
|
|
|
|
|
Cross Default Provisions Maximum Third Party Obligation Amount |
|
50,000,000
|
|
|
|
|
Commodity [Member] | Risk Management Contracts [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[6] |
389,000,000
|
|
264,400,000
|
|
|
Long-term Risk Management Assets |
[6] |
300,900,000
|
|
315,000,000
|
|
|
Total Assets |
[6] |
689,900,000
|
|
579,400,000
|
|
|
Current Risk Management Liabilities |
[6] |
334,600,000
|
|
227,200,000
|
|
|
Long-term Risk Management Liabilities |
[6] |
280,600,000
|
|
301,000,000
|
|
|
Total Liabilities |
[6] |
615,200,000
|
|
528,200,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[6] |
74,700,000
|
|
51,200,000
|
|
|
Commodity [Member] | Risk Management Contracts [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[6] |
500,000
|
|
400,000
|
|
|
Long-term Risk Management Assets |
[6] |
0
|
|
0
|
|
|
Total Assets |
[6] |
500,000
|
|
400,000
|
|
|
Current Risk Management Liabilities |
[6] |
0
|
|
0
|
|
|
Long-term Risk Management Liabilities |
[6] |
0
|
|
0
|
|
|
Total Liabilities |
[6] |
0
|
|
0
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[6] |
500,000
|
|
400,000
|
|
|
Commodity [Member] | Risk Management Contracts [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[6] |
75,600,000
|
|
22,700,000
|
|
|
Long-term Risk Management Assets |
[6] |
2,400,000
|
|
1,900,000
|
|
|
Total Assets |
[6] |
78,000,000
|
|
24,600,000
|
|
|
Current Risk Management Liabilities |
[6] |
50,600,000
|
|
20,600,000
|
|
|
Long-term Risk Management Liabilities |
[6] |
1,400,000
|
|
2,800,000
|
|
|
Total Liabilities |
[6] |
52,000,000
|
|
23,400,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[6] |
26,000,000
|
|
1,200,000
|
|
|
Commodity [Member] | Risk Management Contracts [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[6] |
47,200,000
|
|
14,900,000
|
|
|
Long-term Risk Management Assets |
[6] |
1,600,000
|
|
1,100,000
|
|
|
Total Assets |
[6] |
48,800,000
|
|
16,000,000
|
|
|
Current Risk Management Liabilities |
[6] |
48,500,000
|
|
11,800,000
|
|
|
Long-term Risk Management Liabilities |
[6] |
900,000
|
|
1,900,000
|
|
|
Total Liabilities |
[6] |
49,400,000
|
|
13,700,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[6] |
(600,000)
|
|
2,300,000
|
|
|
Commodity [Member] | Risk Management Contracts [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[6] |
600,000
|
|
400,000
|
|
|
Long-term Risk Management Assets |
[6] |
0
|
|
0
|
|
|
Total Assets |
[6] |
600,000
|
|
400,000
|
|
|
Current Risk Management Liabilities |
[6] |
6,400,000
|
|
5,900,000
|
|
|
Long-term Risk Management Liabilities |
[6] |
126,000,000
|
|
113,100,000
|
|
|
Total Liabilities |
[6] |
132,400,000
|
|
119,000,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[6] |
(131,800,000)
|
|
(118,600,000)
|
|
|
Commodity [Member] | Risk Management Contracts [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[6] |
6,600,000
|
|
900,000
|
|
|
Long-term Risk Management Assets |
[6] |
0
|
|
0
|
|
|
Total Assets |
[6] |
6,600,000
|
|
900,000
|
|
|
Current Risk Management Liabilities |
[6] |
200,000
|
|
0
|
|
|
Long-term Risk Management Liabilities |
[6] |
0
|
|
0
|
|
|
Total Liabilities |
[6] |
200,000
|
|
0
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[6] |
6,400,000
|
|
900,000
|
|
|
Commodity [Member] | Risk Management Contracts [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[6] |
7,000,000
|
|
1,100,000
|
|
|
Long-term Risk Management Assets |
[6] |
0
|
|
0
|
|
|
Total Assets |
[6] |
7,000,000
|
|
1,100,000
|
|
|
Current Risk Management Liabilities |
[6] |
800,000
|
|
400,000
|
|
|
Long-term Risk Management Liabilities |
[6] |
0
|
|
0
|
|
|
Total Liabilities |
[6] |
800,000
|
|
400,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[6] |
6,200,000
|
|
700,000
|
|
|
Commodity [Member] | Hedging Contracts [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[6] |
17,500,000
|
|
13,200,000
|
|
|
Long-term Risk Management Assets |
[6] |
6,300,000
|
|
7,700,000
|
|
|
Total Assets |
[6] |
23,800,000
|
|
20,900,000
|
|
|
Current Risk Management Liabilities |
[6] |
9,000,000
|
|
6,300,000
|
|
|
Long-term Risk Management Liabilities |
[6] |
58,300,000
|
|
50,100,000
|
|
|
Total Liabilities |
[6] |
67,300,000
|
|
56,400,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[6] |
(43,500,000)
|
|
(35,500,000)
|
|
|
Interest Rate and Foreign Currency [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
500,000,000
|
|
500,000,000
|
|
|
Impact of Cash Flow Hedges on the Balance Sheet |
|
|
|
|
|
|
Hedging Assets |
[5] |
0
|
|
0
|
|
|
Hedging Liabilities |
[5] |
0
|
|
0
|
|
|
AOCI Gain (Loss) Net of Tax |
|
(13,000,000)
|
|
(15,700,000)
|
|
|
Portion Expected to be Reclassified to Net Income During the Next Twelve Months |
|
(800,000)
|
|
(1,000,000)
|
|
|
Interest Rate and Foreign Currency [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
0
|
|
|
Impact of Cash Flow Hedges on the Balance Sheet |
|
|
|
|
|
|
AOCI Gain (Loss) Net of Tax |
|
(4,500,000)
|
|
(5,400,000)
|
|
|
Portion Expected to be Reclassified to Net Income During the Next Twelve Months |
|
(900,000)
|
|
(900,000)
|
|
|
Interest Rate and Foreign Currency [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
0
|
|
|
Impact of Cash Flow Hedges on the Balance Sheet |
|
|
|
|
|
|
AOCI Gain (Loss) Net of Tax |
|
2,200,000
|
|
2,900,000
|
|
|
Portion Expected to be Reclassified to Net Income During the Next Twelve Months |
|
700,000
|
|
700,000
|
|
|
Interest Rate and Foreign Currency [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
0
|
|
|
Impact of Cash Flow Hedges on the Balance Sheet |
|
|
|
|
|
|
AOCI Gain (Loss) Net of Tax |
|
(10,700,000)
|
|
(12,000,000)
|
|
|
Portion Expected to be Reclassified to Net Income During the Next Twelve Months |
|
(1,300,000)
|
|
(1,300,000)
|
|
|
Interest Rate and Foreign Currency [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
0
|
|
|
Impact of Cash Flow Hedges on the Balance Sheet |
|
|
|
|
|
|
AOCI Gain (Loss) Net of Tax |
|
1,900,000
|
|
3,000,000
|
|
|
Portion Expected to be Reclassified to Net Income During the Next Twelve Months |
|
1,100,000
|
|
1,100,000
|
|
|
Interest Rate and Foreign Currency [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
0
|
|
|
Impact of Cash Flow Hedges on the Balance Sheet |
|
|
|
|
|
|
AOCI Gain (Loss) Net of Tax |
|
2,600,000
|
|
3,400,000
|
|
|
Portion Expected to be Reclassified to Net Income During the Next Twelve Months |
|
800,000
|
|
800,000
|
|
|
Interest Rate and Foreign Currency [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
0
|
|
|
Impact of Cash Flow Hedges on the Balance Sheet |
|
|
|
|
|
|
AOCI Gain (Loss) Net of Tax |
|
(6,000,000)
|
|
(7,400,000)
|
|
|
Portion Expected to be Reclassified to Net Income During the Next Twelve Months |
|
(1,400,000)
|
|
(1,400,000)
|
|
|
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[6] |
2,500,000
|
|
0
|
|
|
Long-term Risk Management Assets |
[6] |
0
|
|
0
|
|
|
Total Assets |
[6] |
2,500,000
|
|
0
|
|
|
Current Risk Management Liabilities |
[6] |
0
|
|
0
|
|
|
Long-term Risk Management Liabilities |
[6] |
8,600,000
|
|
1,400,000
|
|
|
Total Liabilities |
[6] |
8,600,000
|
|
1,400,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[6] |
(6,100,000)
|
|
(1,400,000)
|
|
|
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
|
409,000,000
|
|
277,600,000
|
|
|
Long-term Risk Management Assets |
|
307,200,000
|
|
322,700,000
|
|
|
Total Assets |
|
716,200,000
|
|
600,300,000
|
|
|
Current Risk Management Liabilities |
|
343,600,000
|
|
233,500,000
|
|
|
Long-term Risk Management Liabilities |
|
347,500,000
|
|
352,500,000
|
|
|
Total Liabilities |
|
691,100,000
|
|
586,000,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
|
25,100,000
|
|
14,300,000
|
|
|
Gross Amounts Offset in the Statement of Financial Position [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[7] |
(282,800,000)
|
|
(183,100,000)
|
|
|
Long-term Risk Management Assets |
[7] |
(25,100,000)
|
|
(33,600,000)
|
|
|
Total Assets |
[7] |
(307,900,000)
|
|
(216,700,000)
|
|
|
Current Risk Management Liabilities |
[7] |
(282,000,000)
|
|
(180,100,000)
|
|
|
Long-term Risk Management Liabilities |
[7] |
(25,500,000)
|
|
(36,300,000)
|
|
|
Total Liabilities |
[7] |
(307,500,000)
|
|
(216,400,000)
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[7] |
(400,000)
|
|
(300,000)
|
|
|
Gross Amounts Offset in the Statement of Financial Position [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[7] |
0
|
|
(200,000)
|
|
|
Long-term Risk Management Assets |
[7] |
0
|
|
0
|
|
|
Total Assets |
[7] |
0
|
|
(200,000)
|
|
|
Current Risk Management Liabilities |
[7] |
0
|
|
0
|
|
|
Long-term Risk Management Liabilities |
[7] |
0
|
|
0
|
|
|
Total Liabilities |
[7] |
0
|
|
0
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[7] |
0
|
|
(200,000)
|
|
|
Gross Amounts Offset in the Statement of Financial Position [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[7] |
(50,700,000)
|
|
(20,100,000)
|
|
|
Long-term Risk Management Assets |
[7] |
(1,300,000)
|
|
(1,900,000)
|
|
|
Total Assets |
[7] |
(52,000,000)
|
|
(22,000,000)
|
|
|
Current Risk Management Liabilities |
[7] |
(49,300,000)
|
|
(20,300,000)
|
|
|
Long-term Risk Management Liabilities |
[7] |
(1,200,000)
|
|
(1,900,000)
|
|
|
Total Liabilities |
[7] |
(50,500,000)
|
|
(22,200,000)
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[7] |
(1,500,000)
|
|
200,000
|
|
|
Gross Amounts Offset in the Statement of Financial Position [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[7] |
(39,600,000)
|
|
(11,400,000)
|
|
|
Long-term Risk Management Assets |
[7] |
(900,000)
|
|
(1,100,000)
|
|
|
Total Assets |
[7] |
(40,500,000)
|
|
(12,500,000)
|
|
|
Current Risk Management Liabilities |
[7] |
(45,000,000)
|
|
(11,500,000)
|
|
|
Long-term Risk Management Liabilities |
[7] |
(800,000)
|
|
(1,100,000)
|
|
|
Total Liabilities |
[7] |
(45,800,000)
|
|
(12,600,000)
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[7] |
5,300,000
|
|
100,000
|
|
|
Gross Amounts Offset in the Statement of Financial Position [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[7] |
0
|
|
(200,000)
|
|
|
Long-term Risk Management Assets |
[7] |
0
|
|
0
|
|
|
Total Assets |
[7] |
0
|
|
(200,000)
|
|
|
Current Risk Management Liabilities |
[7] |
0
|
|
0
|
|
|
Long-term Risk Management Liabilities |
[7] |
0
|
|
0
|
|
|
Total Liabilities |
[7] |
0
|
|
0
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[7] |
0
|
|
(200,000)
|
|
|
Gross Amounts Offset in the Statement of Financial Position [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[7] |
(200,000)
|
|
(100,000)
|
|
|
Long-term Risk Management Assets |
[7] |
0
|
|
0
|
|
|
Total Assets |
[7] |
(200,000)
|
|
(100,000)
|
|
|
Current Risk Management Liabilities |
[7] |
(200,000)
|
|
0
|
|
|
Long-term Risk Management Liabilities |
[7] |
0
|
|
0
|
|
|
Total Liabilities |
[7] |
(200,000)
|
|
0
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[7] |
0
|
|
(100,000)
|
|
|
Gross Amounts Offset in the Statement of Financial Position [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[7] |
(600,000)
|
|
(200,000)
|
|
|
Long-term Risk Management Assets |
[7] |
0
|
|
0
|
|
|
Total Assets |
[7] |
(600,000)
|
|
(200,000)
|
|
|
Current Risk Management Liabilities |
[7] |
(600,000)
|
|
(100,000)
|
|
|
Long-term Risk Management Liabilities |
[7] |
0
|
|
0
|
|
|
Total Liabilities |
[7] |
(600,000)
|
|
(100,000)
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[7] |
0
|
|
(100,000)
|
|
|
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[8] |
126,200,000
|
|
94,500,000
|
|
|
Long-term Risk Management Assets |
[8] |
282,100,000
|
|
289,100,000
|
|
|
Total Assets |
[8] |
408,300,000
|
|
383,600,000
|
|
|
Current Risk Management Liabilities |
[8] |
61,600,000
|
|
53,400,000
|
|
|
Long-term Risk Management Liabilities |
[8] |
322,000,000
|
|
316,200,000
|
|
|
Total Liabilities |
[8] |
383,600,000
|
|
369,600,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[8] |
24,700,000
|
|
14,000,000
|
|
|
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[8] |
500,000
|
|
200,000
|
|
|
Long-term Risk Management Assets |
[8] |
0
|
|
0
|
|
|
Total Assets |
[8] |
500,000
|
|
200,000
|
|
|
Current Risk Management Liabilities |
[8] |
0
|
|
0
|
|
|
Long-term Risk Management Liabilities |
[8] |
0
|
|
0
|
|
|
Total Liabilities |
[8] |
0
|
|
0
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[8] |
500,000
|
|
200,000
|
|
|
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[8] |
24,900,000
|
|
2,600,000
|
|
|
Long-term Risk Management Assets |
[8] |
1,100,000
|
|
0
|
|
|
Total Assets |
[8] |
26,000,000
|
|
2,600,000
|
|
|
Current Risk Management Liabilities |
[8] |
1,300,000
|
|
300,000
|
|
|
Long-term Risk Management Liabilities |
[8] |
200,000
|
|
900,000
|
|
|
Total Liabilities |
[8] |
1,500,000
|
|
1,200,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[8] |
24,500,000
|
|
1,400,000
|
|
|
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[8] |
7,600,000
|
|
3,500,000
|
|
|
Long-term Risk Management Assets |
[8] |
700,000
|
|
0
|
|
|
Total Assets |
[8] |
8,300,000
|
|
3,500,000
|
|
|
Current Risk Management Liabilities |
[8] |
3,500,000
|
|
300,000
|
|
|
Long-term Risk Management Liabilities |
[8] |
100,000
|
|
800,000
|
|
|
Total Liabilities |
[8] |
3,600,000
|
|
1,100,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[8] |
4,700,000
|
|
2,400,000
|
|
|
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[8] |
600,000
|
|
200,000
|
|
|
Long-term Risk Management Assets |
[8] |
0
|
|
0
|
|
|
Total Assets |
[8] |
600,000
|
|
200,000
|
|
|
Current Risk Management Liabilities |
[8] |
6,400,000
|
|
5,900,000
|
|
|
Long-term Risk Management Liabilities |
[8] |
126,000,000
|
|
113,100,000
|
|
|
Total Liabilities |
[8] |
132,400,000
|
|
119,000,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[8] |
(131,800,000)
|
|
(118,800,000)
|
|
|
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[8] |
6,400,000
|
|
800,000
|
|
|
Long-term Risk Management Assets |
[8] |
0
|
|
0
|
|
|
Total Assets |
[8] |
6,400,000
|
|
800,000
|
|
|
Current Risk Management Liabilities |
[8] |
0
|
|
0
|
|
|
Long-term Risk Management Liabilities |
[8] |
0
|
|
0
|
|
|
Total Liabilities |
[8] |
0
|
|
0
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[8] |
6,400,000
|
|
800,000
|
|
|
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Fair Value of Derivative Instruments |
|
|
|
|
|
|
Current Risk Management Assets |
[8] |
6,400,000
|
|
900,000
|
|
|
Long-term Risk Management Assets |
[8] |
0
|
|
0
|
|
|
Total Assets |
[8] |
6,400,000
|
|
900,000
|
|
|
Current Risk Management Liabilities |
[8] |
200,000
|
|
300,000
|
|
|
Long-term Risk Management Liabilities |
[8] |
0
|
|
0
|
|
|
Total Liabilities |
[8] |
200,000
|
|
300,000
|
|
|
Total MTM Derivative Contract Net Assets (Liabilities) |
[8] |
$ 6,200,000
|
|
$ 600,000
|
|
|
Power [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MWh |
|
358.7
|
|
348.0
|
|
|
Power [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MWh |
|
0.0
|
|
0.0
|
|
|
Power [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MWh |
|
57.4
|
|
51.9
|
|
|
Power [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MWh |
|
38.5
|
|
19.9
|
|
|
Power [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MWh |
|
10.4
|
|
11.2
|
|
|
Power [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MWh |
|
10.3
|
|
11.9
|
|
|
Power [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MWh |
|
22.7
|
|
14.2
|
|
|
Coal [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Mass Notional Amount | T |
|
2.0
|
|
1.5
|
|
|
Coal [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Mass Notional Amount | T |
|
0.0
|
|
0.0
|
|
|
Coal [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Mass Notional Amount | T |
|
0.0
|
|
0.0
|
|
|
Coal [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Mass Notional Amount | T |
|
2.0
|
|
0.5
|
|
|
Coal [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Mass Notional Amount | T |
|
0.0
|
|
0.0
|
|
|
Coal [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Mass Notional Amount | T |
|
0.0
|
|
0.0
|
|
|
Coal [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Mass Notional Amount | T |
|
0.0
|
|
1.0
|
|
|
Natural Gas [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MMBTU |
|
53.7
|
|
32.8
|
|
|
Natural Gas [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MMBTU |
|
0.0
|
|
0.0
|
|
|
Natural Gas [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MMBTU |
|
1.1
|
|
0.0
|
|
|
Natural Gas [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MMBTU |
|
0.7
|
|
0.0
|
|
|
Natural Gas [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MMBTU |
|
0.0
|
|
0.0
|
|
|
Natural Gas [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MMBTU |
|
0.0
|
|
0.0
|
|
|
Natural Gas [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Energy Notional Amount | MMBTU |
|
18.3
|
|
0.0
|
|
|
Heating Oil and Gasoline [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Volume Notional Amount | gal |
|
6.9
|
|
7.4
|
|
|
Heating Oil and Gasoline [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Volume Notional Amount | gal |
|
1.4
|
|
1.5
|
|
|
Heating Oil and Gasoline [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Volume Notional Amount | gal |
|
1.3
|
|
1.4
|
|
|
Heating Oil and Gasoline [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Volume Notional Amount | gal |
|
0.7
|
|
0.7
|
|
|
Heating Oil and Gasoline [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Volume Notional Amount | gal |
|
1.6
|
|
1.6
|
|
|
Heating Oil and Gasoline [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Volume Notional Amount | gal |
|
0.7
|
|
0.8
|
|
|
Heating Oil and Gasoline [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Volume Notional Amount | gal |
|
0.8
|
|
0.9
|
|
|
Interest Rate Contract [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
$ 50,700,000
|
|
$ 75,200,000
|
|
|
Interest Rate Contract [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
0
|
|
|
Interest Rate Contract [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
100,000
|
|
|
Interest Rate Contract [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
100,000
|
|
|
Interest Rate Contract [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
0
|
|
|
Interest Rate Contract [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
0
|
|
|
Interest Rate Contract [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Commodity |
|
|
|
|
|
|
Derivative, Notional Amount |
|
0
|
|
0
|
|
|
Vertically Integrated Utilities Revenues [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
6,100,000
|
|
4,000,000
|
|
6,700,000
|
Vertically Integrated Utilities Revenues [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Vertically Integrated Utilities Revenues [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Vertically Integrated Utilities Revenues [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Vertically Integrated Utilities Revenues [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Vertically Integrated Utilities Revenues [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Vertically Integrated Utilities Revenues [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Transmission and Distribution Utilities Revenues [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
100,000
|
|
(4,300,000)
|
Transmission and Distribution Utilities Revenues [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Transmission and Distribution Utilities Revenues [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Transmission and Distribution Utilities Revenues [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Transmission and Distribution Utilities Revenues [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Transmission and Distribution Utilities Revenues [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Transmission and Distribution Utilities Revenues [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Generation and Marketing Revenues [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
42,800,000
|
|
59,400,000
|
|
54,900,000
|
Generation and Marketing Revenues [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Generation and Marketing Revenues [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Generation and Marketing Revenues [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Generation and Marketing Revenues [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Generation and Marketing Revenues [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Generation and Marketing Revenues [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Electric Generation, Transmission and Distribution Revenues [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Electric Generation, Transmission and Distribution Revenues [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Electric Generation, Transmission and Distribution Revenues [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
600,000
|
|
(600,000)
|
|
1,100,000
|
Electric Generation, Transmission and Distribution Revenues [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
5,300,000
|
|
4,100,000
|
|
3,300,000
|
Electric Generation, Transmission and Distribution Revenues [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
100,000
|
|
(4,300,000)
|
Electric Generation, Transmission and Distribution Revenues [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Electric Generation, Transmission and Distribution Revenues [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
0
|
|
0
|
Sales to AEP Affiliates [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Sales to AEP Affiliates [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Sales to AEP Affiliates [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
2,100,000
|
|
2,400,000
|
Sales to AEP Affiliates [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
5,800,000
|
|
8,200,000
|
Sales to AEP Affiliates [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Sales to AEP Affiliates [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Sales to AEP Affiliates [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
0
|
|
0
|
Purchased Electricity for Resale [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
5,600,000
|
|
6,600,000
|
|
6,400,000
|
Purchased Electricity for Resale [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Purchased Electricity for Resale [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
2,000,000
|
|
3,500,000
|
|
2,000,000
|
Purchased Electricity for Resale [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
600,000
|
|
300,000
|
|
400,000
|
Purchased Electricity for Resale [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Purchased Electricity for Resale [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Purchased Electricity for Resale [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
0
|
|
0
|
|
0
|
Other Operation Expense [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
800,000
|
|
(1,600,000)
|
|
(3,300,000)
|
Other Operation Expense [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(400,000)
|
|
(800,000)
|
Other Operation Expense [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(100,000)
|
|
(400,000)
|
Other Operation Expense [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(100,000)
|
|
(400,000)
|
Other Operation Expense [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(300,000)
|
|
(600,000)
|
Other Operation Expense [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(100,000)
|
|
(400,000)
|
Other Operation Expense [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(300,000)
|
|
(500,000)
|
Maintenance Expense [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
700,000
|
|
(1,800,000)
|
|
(3,300,000)
|
Maintenance Expense [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
200,000
|
|
(400,000)
|
|
(700,000)
|
Maintenance Expense [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(400,000)
|
|
(700,000)
|
Maintenance Expense [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(100,000)
|
|
(400,000)
|
Maintenance Expense [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(400,000)
|
|
(500,000)
|
Maintenance Expense [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(200,000)
|
|
(400,000)
|
Maintenance Expense [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
100,000
|
|
(200,000)
|
|
(400,000)
|
Regulatory Assets [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
(29,400,000)
|
|
(117,400,000)
|
|
(900,000)
|
Regulatory Assets [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
0
|
|
800,000
|
|
400,000
|
Regulatory Assets [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
0
|
|
600,000
|
|
3,400,000
|
Regulatory Assets [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
(7,400,000)
|
|
3,100,000
|
|
(2,700,000)
|
Regulatory Assets [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
(22,000,000)
|
|
(127,700,000)
|
|
0
|
Regulatory Assets [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
0
|
|
400,000
|
|
600,000
|
Regulatory Assets [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
300,000
|
|
5,200,000
|
|
(4,300,000)
|
Regulatory Liabilities [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
109,400,000
|
|
79,100,000
|
|
30,200,000
|
Regulatory Liabilities [Member] | AEP Texas Inc. [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
100,000
|
|
400,000
|
|
0
|
Regulatory Liabilities [Member] | Appalachian Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
40,400,000
|
|
51,400,000
|
|
28,700,000
|
Regulatory Liabilities [Member] | Indiana Michigan Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
15,900,000
|
|
13,900,000
|
|
7,500,000
|
Regulatory Liabilities [Member] | Ohio Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
0
|
|
(15,200,000)
|
|
(24,700,000)
|
Regulatory Liabilities [Member] | Public Service Co Of Oklahoma [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
24,800,000
|
|
6,500,000
|
|
4,400,000
|
Regulatory Liabilities [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
|
|
|
|
|
|
Amount of Gain (Loss) Recognized on Risk Management Contracts |
[9] |
$ 24,300,000
|
|
$ 15,700,000
|
|
$ 15,100,000
|
|
|