Consolidated Statements of Income - USD ($) $ in Millions |
12 Months Ended |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Revenues |
|
|
|
Vertically Integrated Utilities |
$ 9,095.1
|
$ 9,012.4
|
$ 9,069.9
|
Transmission and Distribution Utilities |
4,328.9
|
4,328.3
|
4,392.0
|
Generation and Marketing Revenues |
1,771.4
|
2,858.7
|
2,866.7
|
Sales to AEP Affiliates |
0.0
|
0.0
|
0.0
|
Other Revenues |
229.5
|
180.7
|
124.6
|
TOTAL REVENUES |
15,424.9
|
16,380.1
|
16,453.2
|
Expenses |
|
|
|
Fuel and Other Consumables Used for Electric Generation |
2,346.5
|
2,908.9
|
3,348.1
|
Purchased Electricity for Resale |
2,965.3
|
2,821.4
|
2,760.1
|
Other Operation |
2,484.0
|
2,956.9
|
2,703.9
|
Maintenance |
1,141.3
|
1,237.7
|
1,325.3
|
Asset Impairments and Other Related Charges |
87.1
|
2,267.8
|
0.0
|
Gain on Sale of Merchant Generation Assets |
(226.4)
|
0.0
|
0.0
|
Depreciation and Amortization |
1,997.2
|
1,962.3
|
2,009.7
|
Taxes Other Than Income Taxes |
1,059.4
|
1,018.0
|
972.6
|
TOTAL EXPENSES |
11,854.4
|
15,173.0
|
13,119.7
|
OPERATING INCOME (LOSS) |
3,570.5
|
1,207.1
|
3,333.5
|
Other Income (Expense): |
|
|
|
Interest and Investment Income |
16.0
|
16.3
|
7.9
|
Carrying Costs Income |
18.6
|
16.2
|
23.5
|
Allowance for Equity Funds Used During Construction |
93.7
|
113.2
|
131.9
|
Gain on Sale of Equity Investment |
12.4
|
0.0
|
0.0
|
Interest Expense |
(895.0)
|
(877.2)
|
(873.9)
|
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS) |
2,816.2
|
475.6
|
2,622.9
|
Income Tax Expense (Credit) |
969.7
|
(73.7)
|
919.6
|
Equity Earnings (Loss) of Unconsolidated Subsidiaries |
82.4
|
71.2
|
65.3
|
Income (Loss) from Continuing Operations |
1,928.9
|
620.5
|
1,768.6
|
Income (Loss) from Discontinued Operations, Net of Tax |
0.0
|
(2.5)
|
283.7
|
NET INCOME (LOSS) |
1,928.9
|
618.0
|
2,052.3
|
Net Income Attributable to Noncontrolling Interests |
16.3
|
7.1
|
5.2
|
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS |
$ 1,912.6
|
$ 610.9
|
$ 2,047.1
|
Earnings Per Share |
|
|
|
WEIGHTED AVERAGE NUMBER OF BASIC AEP COMMON SHARES OUTSTANDING |
491,814,651
|
491,495,458
|
490,340,522
|
BASIC EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS FROM CONTINUING OPERATIONS |
$ 3.89
|
$ 1.25
|
$ 3.59
|
BASIC EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS FROM DISCONTINUED OPERATIONS |
0.00
|
(0.01)
|
0.58
|
TOTAL BASIC EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS |
$ 3.89
|
$ 1.24
|
$ 4.17
|
WEIGHTED AVERAGE NUMBER OF DILUTED AEP COMMON SHARES OUTSTANDING |
492,611,067
|
491,662,007
|
490,574,568
|
DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS FROM CONTINUING OPERATIONS |
$ 3.88
|
$ 1.25
|
$ 3.59
|
DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS FROM DISCONTINUED OPERATIONS |
0.00
|
(0.01)
|
0.58
|
TOTAL DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS |
$ 3.88
|
$ 1.24
|
$ 4.17
|
AEP Texas Inc. [Member] |
|
|
|
Revenues |
|
|
|
Transmission and Distribution Utilities |
$ 1,470.3
|
$ 1,383.2
|
$ 1,374.1
|
Sales to AEP Affiliates |
65.7
|
75.7
|
78.5
|
Other Revenues |
2.4
|
2.5
|
5.4
|
TOTAL REVENUES |
1,538.4
|
1,461.4
|
1,458.0
|
Expenses |
|
|
|
Fuel and Other Consumables Used for Electric Generation |
20.9
|
32.1
|
32.1
|
Other Operation |
449.5
|
454.5
|
439.9
|
Maintenance |
75.9
|
73.7
|
91.0
|
Asset Impairments and Other Related Charges |
|
72.7
|
0.0
|
Depreciation and Amortization |
450.1
|
413.9
|
468.9
|
Taxes Other Than Income Taxes |
122.3
|
107.6
|
105.3
|
TOTAL EXPENSES |
1,118.7
|
1,081.8
|
1,137.2
|
OPERATING INCOME (LOSS) |
419.7
|
379.6
|
320.8
|
Other Income (Expense): |
|
|
|
Interest Income |
2.9
|
10.9
|
0.8
|
Allowance for Equity Funds Used During Construction |
6.8
|
9.2
|
6.7
|
Interest Expense |
(142.3)
|
(144.4)
|
(148.4)
|
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS) |
287.1
|
255.3
|
179.9
|
Income Tax Expense (Credit) |
(23.4)
|
59.9
|
58.2
|
Income (Loss) from Continuing Operations |
310.5
|
195.4
|
121.7
|
Income (Loss) from Discontinued Operations, Net of Tax |
0.0
|
(48.8)
|
(1.4)
|
NET INCOME (LOSS) |
310.5
|
146.6
|
120.3
|
AEP Transmission Co [Member] |
|
|
|
Revenues |
|
|
|
Electrical Transmission Revenue |
141.9
|
110.4
|
84.3
|
Sales to AEP Affiliates |
580.5
|
367.5
|
225.6
|
Other Revenues |
0.8
|
0.1
|
0.3
|
TOTAL REVENUES |
723.2
|
478.0
|
310.2
|
Expenses |
|
|
|
Other Operation |
60.1
|
37.0
|
22.4
|
Maintenance |
8.5
|
6.7
|
5.0
|
Depreciation and Amortization |
97.1
|
65.9
|
42.4
|
Taxes Other Than Income Taxes |
109.7
|
88.3
|
66.0
|
TOTAL EXPENSES |
275.4
|
197.9
|
135.8
|
OPERATING INCOME (LOSS) |
447.8
|
280.1
|
174.4
|
Other Income (Expense): |
|
|
|
Interest Income |
1.2
|
0.4
|
0.1
|
Allowance for Equity Funds Used During Construction |
52.3
|
52.3
|
53.0
|
Interest Expense |
(68.0)
|
(46.0)
|
(34.6)
|
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS) |
433.3
|
286.8
|
192.9
|
Income Tax Expense (Credit) |
147.2
|
94.1
|
60.0
|
NET INCOME (LOSS) |
286.1
|
192.7
|
132.9
|
Appalachian Power Co [Member] |
|
|
|
Revenues |
|
|
|
Vertically Integrated Utilities |
2,749.0
|
2,847.4
|
2,805.6
|
Sales to AEP Affiliates |
172.0
|
142.1
|
147.8
|
Other Revenues |
13.2
|
11.7
|
10.1
|
TOTAL REVENUES |
2,934.2
|
3,001.2
|
2,963.5
|
Expenses |
|
|
|
Fuel and Other Consumables Used for Electric Generation |
597.3
|
654.9
|
675.9
|
Purchased Electricity for Resale |
357.6
|
329.3
|
395.2
|
Other Operation |
497.9
|
486.7
|
405.4
|
Maintenance |
251.6
|
275.0
|
263.3
|
Depreciation and Amortization |
407.9
|
388.5
|
388.8
|
Taxes Other Than Income Taxes |
126.4
|
123.5
|
124.1
|
TOTAL EXPENSES |
2,238.7
|
2,257.9
|
2,252.7
|
OPERATING INCOME (LOSS) |
695.5
|
743.3
|
710.8
|
Other Income (Expense): |
|
|
|
Interest Income |
1.4
|
1.3
|
1.4
|
Carrying Costs Income |
1.4
|
0.4
|
1.2
|
Allowance for Equity Funds Used During Construction |
9.2
|
11.7
|
13.8
|
Interest Expense |
(190.9)
|
(188.5)
|
(192.3)
|
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS) |
516.6
|
568.2
|
534.9
|
Income Tax Expense (Credit) |
185.3
|
199.1
|
194.3
|
NET INCOME (LOSS) |
331.3
|
369.1
|
340.6
|
Indiana Michigan Power Co [Member] |
|
|
|
Revenues |
|
|
|
Vertically Integrated Utilities |
2,042.5
|
2,062.3
|
2,073.3
|
Sales to AEP Affiliates |
1.8
|
26.2
|
27.4
|
Other Revenues - Affiliated |
62.6
|
62.1
|
78.8
|
Other Revenues |
14.3
|
17.0
|
6.7
|
TOTAL REVENUES |
2,121.2
|
2,167.6
|
2,186.2
|
Expenses |
|
|
|
Fuel and Other Consumables Used for Electric Generation |
295.1
|
284.1
|
336.3
|
Purchased Electricity for Resale |
152.2
|
198.7
|
195.8
|
Purchased Electricity from AEP Affiliates |
223.9
|
228.6
|
232.1
|
Other Operation |
585.2
|
572.0
|
553.4
|
Maintenance |
208.4
|
205.6
|
212.0
|
Asset Impairments and Other Related Charges |
0.0
|
10.5
|
0.0
|
Depreciation and Amortization |
210.9
|
191.7
|
198.4
|
Taxes Other Than Income Taxes |
92.2
|
94.8
|
88.3
|
TOTAL EXPENSES |
1,767.9
|
1,786.0
|
1,816.3
|
OPERATING INCOME (LOSS) |
353.3
|
381.6
|
369.9
|
Other Income (Expense): |
|
|
|
Interest Income |
1.8
|
1.2
|
1.3
|
Carrying Costs Income |
12.7
|
10.1
|
8.3
|
Allowance for Equity Funds Used During Construction |
11.1
|
15.3
|
11.6
|
Interest Expense |
(110.8)
|
(100.8)
|
(90.2)
|
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS) |
268.1
|
307.4
|
300.9
|
Income Tax Expense (Credit) |
81.4
|
67.5
|
96.1
|
NET INCOME (LOSS) |
186.7
|
239.9
|
204.8
|
Ohio Power Co [Member] |
|
|
|
Revenues |
|
|
|
Transmission and Distribution Utilities |
2,853.5
|
2,930.1
|
3,056.1
|
Sales to AEP Affiliates |
24.4
|
17.3
|
84.1
|
Other Revenues |
6.0
|
6.5
|
8.5
|
TOTAL REVENUES |
2,883.9
|
2,953.9
|
3,148.7
|
Expenses |
|
|
|
Purchased Electricity for Resale |
705.9
|
663.1
|
635.0
|
Purchased Electricity from AEP Affiliates |
108.5
|
141.9
|
527.1
|
Generation Deferrals |
0.0
|
(82.7)
|
(30.7)
|
Amortization of Generation Deferrals |
229.2
|
242.9
|
169.1
|
Other Operation |
511.5
|
706.8
|
630.3
|
Maintenance |
141.2
|
148.0
|
166.8
|
Depreciation and Amortization |
225.9
|
238.6
|
217.5
|
Taxes Other Than Income Taxes |
391.5
|
386.8
|
372.8
|
TOTAL EXPENSES |
2,313.7
|
2,445.4
|
2,687.9
|
OPERATING INCOME (LOSS) |
570.2
|
508.5
|
460.8
|
Other Income (Expense): |
|
|
|
Interest Income |
4.9
|
3.8
|
5.6
|
Carrying Costs Income |
3.6
|
19.9
|
11.8
|
Allowance for Equity Funds Used During Construction |
6.4
|
6.0
|
8.8
|
Interest Expense |
(101.9)
|
(112.2)
|
(127.8)
|
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS) |
483.2
|
426.0
|
359.2
|
Income Tax Expense (Credit) |
159.3
|
143.8
|
126.5
|
NET INCOME (LOSS) |
323.9
|
282.2
|
232.7
|
Public Service Co Of Oklahoma [Member] |
|
|
|
Revenues |
|
|
|
Vertically Integrated Utilities |
1,417.5
|
1,242.8
|
1,331.4
|
Sales to AEP Affiliates |
4.3
|
2.6
|
4.6
|
Other Revenues |
5.4
|
4.4
|
3.2
|
TOTAL REVENUES |
1,427.2
|
1,249.8
|
1,339.2
|
Expenses |
|
|
|
Fuel and Other Consumables Used for Electric Generation |
134.5
|
44.8
|
301.4
|
Purchased Electricity for Resale |
514.9
|
441.2
|
316.9
|
Purchased Electricity from AEP Affiliates |
0.0
|
3.7
|
0.0
|
Other Operation |
311.7
|
288.5
|
268.4
|
Maintenance |
120.3
|
106.9
|
104.6
|
Depreciation and Amortization |
130.4
|
130.2
|
117.5
|
Taxes Other Than Income Taxes |
40.5
|
35.8
|
37.2
|
TOTAL EXPENSES |
1,252.3
|
1,051.1
|
1,146.0
|
OPERATING INCOME (LOSS) |
174.9
|
198.7
|
193.2
|
Other Income (Expense): |
|
|
|
Interest Income |
0.1
|
0.7
|
0.4
|
Allowance for Equity Funds Used During Construction |
0.5
|
6.2
|
8.8
|
Interest Expense |
(53.4)
|
(51.2)
|
(58.6)
|
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS) |
122.1
|
154.4
|
143.8
|
Income Tax Expense (Credit) |
50.1
|
54.4
|
51.3
|
NET INCOME (LOSS) |
72.0
|
100.0
|
92.5
|
Southwestern Electric Power Co [Member] |
|
|
|
Revenues |
|
|
|
Vertically Integrated Utilities |
1,752.1
|
1,721.5
|
1,762.3
|
Sales to AEP Affiliates |
25.9
|
24.5
|
16.6
|
Other Revenues |
1.9
|
2.0
|
2.0
|
TOTAL REVENUES |
1,779.9
|
1,748.0
|
1,780.9
|
Expenses |
|
|
|
Fuel and Other Consumables Used for Electric Generation |
496.1
|
517.8
|
570.6
|
Purchased Electricity for Resale |
168.7
|
142.4
|
110.6
|
Other Operation |
314.6
|
331.7
|
294.5
|
Maintenance |
143.5
|
149.7
|
155.9
|
Asset Impairments and Other Related Charges |
33.6
|
0.0
|
0.0
|
Depreciation and Amortization |
217.4
|
196.5
|
192.0
|
Taxes Other Than Income Taxes |
98.3
|
88.8
|
88.1
|
TOTAL EXPENSES |
1,472.2
|
1,426.9
|
1,411.7
|
OPERATING INCOME (LOSS) |
307.7
|
321.1
|
369.2
|
Other Income (Expense): |
|
|
|
Interest Income |
2.7
|
1.5
|
1.2
|
Allowance for Equity Funds Used During Construction |
2.4
|
11.0
|
26.4
|
Interest Expense |
(123.4)
|
(119.7)
|
(119.9)
|
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS) |
189.4
|
213.9
|
276.9
|
Income Tax Expense (Credit) |
48.1
|
52.1
|
84.8
|
Equity Earnings (Loss) of Unconsolidated Subsidiaries |
(3.8)
|
7.9
|
3.9
|
NET INCOME (LOSS) |
137.5
|
169.7
|
196.0
|
Net Income Attributable to Noncontrolling Interests |
12.8
|
4.1
|
3.7
|
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS |
$ 124.7
|
$ 165.6
|
$ 192.3
|