Income Taxes (Details) - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
| Federal: |
|
|
|
|
| Current |
|
$ (116.7)
|
$ 113.1
|
$ (27.8)
|
| Deferred |
|
115.9
|
(88.8)
|
182.6
|
| Total Federal |
|
(0.8)
|
24.3
|
154.8
|
| Current |
|
69.0
|
26.6
|
6.0
|
| Deferred |
|
(13.6)
|
(45.5)
|
(45.3)
|
| Total State and Local |
|
55.4
|
(18.9)
|
(39.3)
|
| Income Tax Expense (Benefit): |
|
|
|
|
| Income Tax Expense (Benefit) |
|
54.6
|
5.4
|
115.5
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Net Income |
|
2,212.6
|
2,305.6
|
2,488.1
|
| Less: Equity Earnings |
|
(58.5)
|
109.4
|
(91.7)
|
| Income Tax Expense (Benefit) |
|
54.6
|
5.4
|
115.5
|
| Pretax Income |
|
2,265.8
|
2,309.6
|
2,600.2
|
| Income Taxes on Pretax Income at Statutory Rate (21%) |
|
$ 475.8
|
$ 485.0
|
$ 546.0
|
| Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |
|
21.00%
|
21.00%
|
21.00%
|
| Reconciliation of Federal Statutory Rate and Amount of Taxes Reported |
|
|
|
|
| Depreciation |
|
$ 26.0
|
$ 17.1
|
$ 25.9
|
| Investment Tax Credit Amortization |
|
(50.3)
|
(14.3)
|
(22.0)
|
| Production Tax Credits |
|
(175.2)
|
(197.1)
|
(98.8)
|
| State and Local Income Taxes, Net |
|
43.7
|
(14.0)
|
39.4
|
| Removal Costs |
|
(22.0)
|
(26.5)
|
(20.0)
|
| AFUDC |
|
(39.8)
|
(29.3)
|
(30.6)
|
| Effective Income Tax Rate Reconciliation, Parent Company Loss Benefit |
|
|
|
0.0
|
| Increase Decrease in Income Taxes Due to Tax Reserve Adjustments |
[1] |
|
|
(55.1)
|
| Tax Reform Excess ADIT Reversal |
|
(151.1)
|
(214.5)
|
(255.6)
|
| Remeasurement of Excess ADIT |
|
(46.0)
|
|
|
| Federal Return to Provision |
|
0.0
|
(17.4)
|
(1.6)
|
| Disallowance Cost |
|
0.0
|
|
|
| Other |
|
(6.5)
|
16.4
|
(12.1)
|
| Income Tax Expense (Benefit) |
|
$ 54.6
|
$ 5.4
|
$ 115.5
|
| Effective Income Tax Rate |
|
2.40%
|
0.20%
|
4.40%
|
| Net Deferred Tax Liability and Significant Temporary Differences |
|
|
|
|
| Deferred Tax Assets |
|
$ 3,216.1
|
$ 3,567.4
|
|
| Deferred Tax Liabilities |
|
(12,631.8)
|
(12,464.3)
|
|
| Property Related Temporary Differences |
|
(7,779.7)
|
(7,788.1)
|
|
| Amounts Due from Customers for Future Federal Income Taxes |
|
900.1
|
962.7
|
|
| Deferred State Income Taxes |
|
(1,222.8)
|
(1,049.3)
|
|
| Securitized Assets |
|
(79.9)
|
(98.9)
|
|
| Regulatory Assets |
|
(768.9)
|
(865.2)
|
|
| Accrued Nuclear Decommissioning |
|
(776.5)
|
(632.7)
|
|
| Net Operating Loss Carryforward |
|
148.0
|
132.4
|
|
| Deferred Tax Assets, Tax Credit Carryforwards [Abstract] |
|
|
|
|
| Tax Credit Carryforward |
|
321.9
|
612.0
|
|
| Operating Lease Liability |
|
131.1
|
142.9
|
|
| Investment in Partnership |
|
(293.1)
|
(338.9)
|
|
| All Other, Net |
|
4.1
|
44.8
|
|
| Net Deferred Tax Liabilities |
|
(9,415.7)
|
(8,896.9)
|
|
| Tax Contingency [Abstract] |
|
|
|
|
| Unrecognized Tax Benefits, if Recognized - Amount |
|
13.0
|
23.0
|
$ 14.0
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Valuation Allowance |
|
|
(28.2)
|
|
| Income Tax Expense (Benefit) |
|
54.6
|
5.4
|
115.5
|
| Operating Income (Loss) |
|
$ (3,556.2)
|
(3,482.7)
|
(3,411.3)
|
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |
|
|
|
|
| corporate alternative minimum tax |
|
15.00%
|
|
|
| Production Tax Credit Proceeds |
|
$ 102.0
|
|
|
| Deferred Revenue |
|
|
7.1
|
|
| Liability, Retirement and Postemployment Benefits |
|
|
2.5
|
|
| Minimum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2036
|
|
|
| Maximum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2041
|
|
|
| AEP Texas Inc. [Member] |
|
|
|
|
| Federal: |
|
|
|
|
| Current |
|
$ 19.8
|
29.0
|
(1.2)
|
| Deferred |
|
63.5
|
41.4
|
40.5
|
| Total Federal |
|
83.3
|
70.4
|
39.3
|
| Current |
|
2.7
|
2.2
|
3.0
|
| Deferred |
|
(0.1)
|
0.0
|
0.8
|
| Total State and Local |
|
2.6
|
2.2
|
3.8
|
| Income Tax Expense (Benefit): |
|
|
|
|
| Income Tax Expense (Benefit) |
|
85.9
|
72.6
|
43.1
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Net Income |
|
370.4
|
307.9
|
289.8
|
| Income Tax Expense (Benefit) |
|
85.9
|
72.6
|
43.1
|
| Pretax Income |
|
456.3
|
380.5
|
332.9
|
| Income Taxes on Pretax Income at Statutory Rate (21%) |
|
95.8
|
79.9
|
69.9
|
| Reconciliation of Federal Statutory Rate and Amount of Taxes Reported |
|
|
|
|
| Depreciation |
|
0.6
|
0.0
|
0.0
|
| Investment Tax Credit Amortization |
|
(0.7)
|
0.0
|
0.0
|
| Production Tax Credits |
|
0.0
|
0.0
|
0.0
|
| State and Local Income Taxes, Net |
|
2.1
|
1.7
|
2.4
|
| Removal Costs |
|
0.0
|
0.0
|
0.0
|
| AFUDC |
|
(6.0)
|
(4.1)
|
(4.5)
|
| Effective Income Tax Rate Reconciliation, Parent Company Loss Benefit |
|
|
|
(3.2)
|
| Increase Decrease in Income Taxes Due to Tax Reserve Adjustments |
|
|
|
0.0
|
| Tax Reform Excess ADIT Reversal |
|
(6.0)
|
(5.5)
|
(21.3)
|
| Remeasurement of Excess ADIT |
|
0.0
|
|
|
| Federal Return to Provision |
|
(0.1)
|
0.0
|
0.0
|
| Disallowance Cost |
|
0.0
|
|
|
| Other |
|
0.2
|
0.6
|
(0.2)
|
| Income Tax Expense (Benefit) |
|
$ 85.9
|
$ 72.6
|
$ 43.1
|
| Effective Income Tax Rate |
|
18.80%
|
19.10%
|
12.90%
|
| Net Deferred Tax Liability and Significant Temporary Differences |
|
|
|
|
| Deferred Tax Assets |
|
$ 173.6
|
$ 177.0
|
|
| Deferred Tax Liabilities |
|
(1,401.4)
|
(1,321.2)
|
|
| Property Related Temporary Differences |
|
(1,227.1)
|
(1,130.7)
|
|
| Amounts Due from Customers for Future Federal Income Taxes |
|
109.3
|
111.0
|
|
| Deferred State Income Taxes |
|
(41.5)
|
(36.6)
|
|
| Securitized Assets |
|
(45.6)
|
(65.0)
|
|
| Regulatory Assets |
|
(57.6)
|
(48.9)
|
|
| Accrued Nuclear Decommissioning |
|
0.0
|
0.0
|
|
| Net Operating Loss Carryforward |
|
0.0
|
0.0
|
|
| Deferred Tax Assets, Tax Credit Carryforwards [Abstract] |
|
|
|
|
| Tax Credit Carryforward |
|
13.7
|
0.0
|
|
| Operating Lease Liability |
|
16.6
|
20.3
|
|
| Investment in Partnership |
|
0.0
|
0.0
|
|
| All Other, Net |
|
4.4
|
5.7
|
|
| Net Deferred Tax Liabilities |
|
(1,227.8)
|
(1,144.2)
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Valuation Allowance |
|
|
0.0
|
|
| Income Tax Expense (Benefit) |
|
85.9
|
72.6
|
$ 43.1
|
| Operating Income (Loss) |
|
$ (639.1)
|
(549.2)
|
(476.0)
|
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |
|
|
|
|
| Deferred Revenue |
|
|
0.0
|
|
| Liability, Retirement and Postemployment Benefits |
|
|
0.0
|
|
| AEP Texas Inc. [Member] | Minimum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2036
|
|
|
| AEP Texas Inc. [Member] | Maximum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2041
|
|
|
| AEP Transmission Co [Member] |
|
|
|
|
| Federal: |
|
|
|
|
| Current |
|
$ 93.9
|
98.0
|
69.8
|
| Deferred |
|
52.3
|
46.0
|
54.1
|
| Total Federal |
|
146.2
|
144.0
|
123.9
|
| Current |
|
9.1
|
8.8
|
5.8
|
| Deferred |
|
(8.2)
|
16.3
|
14.4
|
| Total State and Local |
|
0.9
|
25.1
|
20.2
|
| Income Tax Expense (Benefit): |
|
|
|
|
| Income Tax Expense (Benefit) |
|
147.1
|
169.1
|
144.1
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Net Income |
|
614.2
|
594.2
|
591.7
|
| Income Tax Expense (Benefit) |
|
147.1
|
169.1
|
144.1
|
| Pretax Income |
|
761.3
|
763.3
|
735.8
|
| Income Taxes on Pretax Income at Statutory Rate (21%) |
|
159.9
|
160.3
|
154.5
|
| Reconciliation of Federal Statutory Rate and Amount of Taxes Reported |
|
|
|
|
| Depreciation |
|
2.4
|
0.0
|
0.0
|
| Investment Tax Credit Amortization |
|
0.0
|
0.0
|
0.0
|
| Production Tax Credits |
|
0.0
|
0.0
|
0.0
|
| State and Local Income Taxes, Net |
|
0.7
|
19.8
|
19.8
|
| Removal Costs |
|
0.0
|
0.0
|
0.0
|
| AFUDC |
|
(17.5)
|
(14.8)
|
(14.1)
|
| Effective Income Tax Rate Reconciliation, Parent Company Loss Benefit |
|
|
|
(18.3)
|
| Increase Decrease in Income Taxes Due to Tax Reserve Adjustments |
|
|
|
0.0
|
| Tax Reform Excess ADIT Reversal |
|
1.7
|
0.0
|
0.0
|
| Remeasurement of Excess ADIT |
|
0.0
|
|
|
| Federal Return to Provision |
|
0.0
|
0.0
|
0.0
|
| Disallowance Cost |
|
0.0
|
|
|
| Other |
|
(0.1)
|
3.8
|
2.2
|
| Income Tax Expense (Benefit) |
|
$ 147.1
|
$ 169.1
|
$ 144.1
|
| Effective Income Tax Rate |
|
19.30%
|
22.20%
|
19.60%
|
| Net Deferred Tax Liability and Significant Temporary Differences |
|
|
|
|
| Deferred Tax Assets |
|
$ 188.1
|
$ 165.0
|
|
| Deferred Tax Liabilities |
|
(1,335.8)
|
(1,221.5)
|
|
| Property Related Temporary Differences |
|
(1,134.6)
|
(1,081.5)
|
|
| Amounts Due from Customers for Future Federal Income Taxes |
|
119.0
|
118.5
|
|
| Deferred State Income Taxes |
|
(155.4)
|
(108.1)
|
|
| Securitized Assets |
|
0.0
|
0.0
|
|
| Regulatory Assets |
|
(7.6)
|
(1.1)
|
|
| Accrued Nuclear Decommissioning |
|
0.0
|
0.0
|
|
| Net Operating Loss Carryforward |
|
3.9
|
5.5
|
|
| Deferred Tax Assets, Tax Credit Carryforwards [Abstract] |
|
|
|
|
| Tax Credit Carryforward |
|
0.0
|
0.2
|
|
| Operating Lease Liability |
|
0.3
|
0.3
|
|
| Investment in Partnership |
|
0.0
|
0.0
|
|
| All Other, Net |
|
26.7
|
9.8
|
|
| Net Deferred Tax Liabilities |
|
(1,147.7)
|
(1,056.5)
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Valuation Allowance |
|
|
(0.1)
|
|
| Income Tax Expense (Benefit) |
|
147.1
|
169.1
|
$ 144.1
|
| Operating Income (Loss) |
|
$ (865.6)
|
(853.7)
|
(809.3)
|
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |
|
|
|
|
| Deferred Revenue |
|
|
0.0
|
|
| Liability, Retirement and Postemployment Benefits |
|
|
0.0
|
|
| AEP Transmission Co [Member] | Minimum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2036
|
|
|
| AEP Transmission Co [Member] | Maximum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2041
|
|
|
| Appalachian Power Co [Member] |
|
|
|
|
| Federal: |
|
|
|
|
| Current |
|
$ 62.2
|
(61.0)
|
5.0
|
| Deferred |
|
(60.5)
|
86.6
|
14.9
|
| Total Federal |
|
1.7
|
25.6
|
19.9
|
| Current |
|
6.3
|
(0.4)
|
2.2
|
| Deferred |
|
6.2
|
(7.0)
|
0.0
|
| Total State and Local |
|
12.5
|
(7.4)
|
2.2
|
| Income Tax Expense (Benefit): |
|
|
|
|
| Income Tax Expense (Benefit) |
|
14.2
|
18.2
|
22.1
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Net Income |
|
294.4
|
394.2
|
348.9
|
| Income Tax Expense (Benefit) |
|
14.2
|
18.2
|
22.1
|
| Pretax Income |
|
308.6
|
412.4
|
371.0
|
| Income Taxes on Pretax Income at Statutory Rate (21%) |
|
64.8
|
86.6
|
77.9
|
| Reconciliation of Federal Statutory Rate and Amount of Taxes Reported |
|
|
|
|
| Depreciation |
|
9.9
|
4.7
|
11.7
|
| Investment Tax Credit Amortization |
|
0.0
|
0.0
|
0.0
|
| Production Tax Credits |
|
(0.1)
|
0.0
|
0.0
|
| State and Local Income Taxes, Net |
|
9.9
|
(5.9)
|
2.1
|
| Removal Costs |
|
(5.1)
|
(9.8)
|
(7.3)
|
| AFUDC |
|
(5.5)
|
(3.7)
|
(4.6)
|
| Effective Income Tax Rate Reconciliation, Parent Company Loss Benefit |
|
|
|
0.0
|
| Increase Decrease in Income Taxes Due to Tax Reserve Adjustments |
[1] |
|
|
4.5
|
| Tax Reform Excess ADIT Reversal |
|
(17.3)
|
(50.9)
|
(60.5)
|
| Remeasurement of Excess ADIT |
|
(46.0)
|
|
|
| Federal Return to Provision |
|
3.4
|
(2.8)
|
(1.6)
|
| Disallowance Cost |
|
0.0
|
|
|
| Other |
|
0.2
|
0.0
|
(0.1)
|
| Income Tax Expense (Benefit) |
|
$ 14.2
|
$ 18.2
|
$ 22.1
|
| Effective Income Tax Rate |
|
4.60%
|
4.40%
|
6.00%
|
| Net Deferred Tax Liability and Significant Temporary Differences |
|
|
|
|
| Deferred Tax Assets |
|
$ 473.0
|
$ 510.3
|
|
| Deferred Tax Liabilities |
|
(2,484.9)
|
(2,502.5)
|
|
| Property Related Temporary Differences |
|
(1,556.0)
|
(1,509.8)
|
|
| Amounts Due from Customers for Future Federal Income Taxes |
|
143.4
|
163.0
|
|
| Deferred State Income Taxes |
|
(308.4)
|
(318.5)
|
|
| Securitized Assets |
|
(29.2)
|
(33.9)
|
|
| Regulatory Assets |
|
(257.4)
|
(301.2)
|
|
| Accrued Nuclear Decommissioning |
|
0.0
|
0.0
|
|
| Net Operating Loss Carryforward |
|
0.0
|
0.0
|
|
| Deferred Tax Assets, Tax Credit Carryforwards [Abstract] |
|
|
|
|
| Tax Credit Carryforward |
|
0.1
|
0.0
|
|
| Operating Lease Liability |
|
15.1
|
15.6
|
|
| Investment in Partnership |
|
(0.1)
|
0.0
|
|
| All Other, Net |
|
(19.4)
|
(7.4)
|
|
| Net Deferred Tax Liabilities |
|
(2,011.9)
|
(1,992.2)
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Valuation Allowance |
|
|
0.0
|
|
| Income Tax Expense (Benefit) |
|
14.2
|
18.2
|
$ 22.1
|
| Operating Income (Loss) |
|
$ (531.0)
|
(602.1)
|
(549.4)
|
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |
|
|
|
|
| Deferred Revenue |
|
|
0.0
|
|
| Liability, Retirement and Postemployment Benefits |
|
|
0.0
|
|
| Appalachian Power Co [Member] | Minimum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2036
|
|
|
| Appalachian Power Co [Member] | Maximum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2041
|
|
|
| Indiana Michigan Power Co [Member] |
|
|
|
|
| Federal: |
|
|
|
|
| Current |
|
$ 93.2
|
43.4
|
26.9
|
| Deferred |
|
(56.9)
|
(51.3)
|
(35.5)
|
| Total Federal |
|
36.3
|
(7.9)
|
(8.6)
|
| Current |
|
21.1
|
10.9
|
(0.6)
|
| Deferred |
|
1.2
|
1.2
|
(1.4)
|
| Total State and Local |
|
22.3
|
12.1
|
(2.0)
|
| Income Tax Expense (Benefit): |
|
|
|
|
| Income Tax Expense (Benefit) |
|
58.6
|
4.2
|
(10.6)
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Net Income |
|
335.9
|
324.7
|
279.8
|
| Income Tax Expense (Benefit) |
|
58.6
|
4.2
|
(10.6)
|
| Pretax Income |
|
394.5
|
328.9
|
269.2
|
| Income Taxes on Pretax Income at Statutory Rate (21%) |
|
82.8
|
69.1
|
56.5
|
| Reconciliation of Federal Statutory Rate and Amount of Taxes Reported |
|
|
|
|
| Depreciation |
|
6.4
|
2.9
|
3.5
|
| Investment Tax Credit Amortization |
|
(1.6)
|
(3.1)
|
(6.4)
|
| Production Tax Credits |
|
0.0
|
0.0
|
0.0
|
| State and Local Income Taxes, Net |
|
17.5
|
9.6
|
(1.3)
|
| Removal Costs |
|
(11.8)
|
(12.4)
|
(9.7)
|
| AFUDC |
|
(2.3)
|
(2.1)
|
(2.7)
|
| Effective Income Tax Rate Reconciliation, Parent Company Loss Benefit |
|
|
|
(2.8)
|
| Increase Decrease in Income Taxes Due to Tax Reserve Adjustments |
|
|
|
0.0
|
| Tax Reform Excess ADIT Reversal |
|
(30.0)
|
(54.0)
|
(46.3)
|
| Remeasurement of Excess ADIT |
|
0.0
|
|
|
| Federal Return to Provision |
|
(2.5)
|
(6.2)
|
(0.6)
|
| Disallowance Cost |
|
0.0
|
|
|
| Other |
|
0.1
|
0.4
|
(0.8)
|
| Income Tax Expense (Benefit) |
|
$ 58.6
|
$ 4.2
|
$ (10.6)
|
| Effective Income Tax Rate |
|
14.90%
|
1.30%
|
(3.90%)
|
| Net Deferred Tax Liability and Significant Temporary Differences |
|
|
|
|
| Deferred Tax Assets |
|
$ 1,014.1
|
$ 933.7
|
|
| Deferred Tax Liabilities |
|
(2,184.0)
|
(2,090.7)
|
|
| Property Related Temporary Differences |
|
(298.1)
|
(398.0)
|
|
| Amounts Due from Customers for Future Federal Income Taxes |
|
103.2
|
114.3
|
|
| Deferred State Income Taxes |
|
(238.1)
|
(227.0)
|
|
| Securitized Assets |
|
0.0
|
0.0
|
|
| Regulatory Assets |
|
32.3
|
(29.5)
|
|
| Accrued Nuclear Decommissioning |
|
(776.5)
|
(632.7)
|
|
| Net Operating Loss Carryforward |
|
0.0
|
0.0
|
|
| Deferred Tax Assets, Tax Credit Carryforwards [Abstract] |
|
|
|
|
| Tax Credit Carryforward |
|
7.2
|
0.0
|
|
| Operating Lease Liability |
|
10.8
|
13.6
|
|
| Investment in Partnership |
|
0.0
|
0.0
|
|
| All Other, Net |
|
(10.7)
|
2.3
|
|
| Net Deferred Tax Liabilities |
|
(1,169.9)
|
(1,157.0)
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Valuation Allowance |
|
|
0.0
|
|
| Income Tax Expense (Benefit) |
|
58.6
|
4.2
|
$ (10.6)
|
| Operating Income (Loss) |
|
$ (487.7)
|
(419.9)
|
(357.9)
|
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |
|
|
|
|
| Deferred Revenue |
|
|
0.0
|
|
| Liability, Retirement and Postemployment Benefits |
|
|
0.0
|
|
| Indiana Michigan Power Co [Member] | Minimum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2036
|
|
|
| Indiana Michigan Power Co [Member] | Maximum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2041
|
|
|
| Ohio Power Co [Member] |
|
|
|
|
| Federal: |
|
|
|
|
| Current |
|
$ 46.6
|
(27.0)
|
6.8
|
| Deferred |
|
2.8
|
73.3
|
25.2
|
| Total Federal |
|
49.4
|
46.3
|
32.0
|
| Current |
|
(0.3)
|
(0.3)
|
(3.1)
|
| Deferred |
|
5.2
|
(1.8)
|
5.5
|
| Total State and Local |
|
4.9
|
(2.1)
|
2.4
|
| Income Tax Expense (Benefit): |
|
|
|
|
| Income Tax Expense (Benefit) |
|
54.3
|
44.2
|
34.4
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Net Income |
|
328.2
|
287.8
|
253.6
|
| Less: Equity Earnings |
|
0.0
|
(0.6)
|
0.0
|
| Income Tax Expense (Benefit) |
|
54.3
|
44.2
|
34.4
|
| Pretax Income |
|
382.5
|
331.4
|
288.0
|
| Income Taxes on Pretax Income at Statutory Rate (21%) |
|
80.3
|
69.6
|
60.5
|
| Reconciliation of Federal Statutory Rate and Amount of Taxes Reported |
|
|
|
|
| Depreciation |
|
2.6
|
3.0
|
2.2
|
| Investment Tax Credit Amortization |
|
0.0
|
0.0
|
0.0
|
| Production Tax Credits |
|
0.0
|
0.0
|
0.0
|
| State and Local Income Taxes, Net |
|
3.9
|
(1.6)
|
0.0
|
| Removal Costs |
|
0.0
|
0.0
|
0.0
|
| AFUDC |
|
(3.6)
|
(2.9)
|
(2.3)
|
| Effective Income Tax Rate Reconciliation, Parent Company Loss Benefit |
|
|
|
0.0
|
| Increase Decrease in Income Taxes Due to Tax Reserve Adjustments |
[1] |
|
|
8.9
|
| Tax Reform Excess ADIT Reversal |
|
(28.9)
|
(27.5)
|
(32.6)
|
| Remeasurement of Excess ADIT |
|
0.0
|
|
|
| Federal Return to Provision |
|
(0.4)
|
3.5
|
(1.2)
|
| Disallowance Cost |
|
0.0
|
|
|
| Other |
|
0.4
|
0.1
|
(1.1)
|
| Income Tax Expense (Benefit) |
|
$ 54.3
|
$ 44.2
|
$ 34.4
|
| Effective Income Tax Rate |
|
14.20%
|
13.30%
|
11.90%
|
| Net Deferred Tax Liability and Significant Temporary Differences |
|
|
|
|
| Deferred Tax Assets |
|
$ 271.4
|
$ 218.8
|
|
| Deferred Tax Liabilities |
|
(1,424.1)
|
(1,319.9)
|
|
| Property Related Temporary Differences |
|
(1,162.1)
|
(1,133.8)
|
|
| Amounts Due from Customers for Future Federal Income Taxes |
|
104.5
|
112.6
|
|
| Deferred State Income Taxes |
|
(68.8)
|
(59.6)
|
|
| Securitized Assets |
|
(5.1)
|
0.0
|
|
| Regulatory Assets |
|
(83.5)
|
(57.6)
|
|
| Accrued Nuclear Decommissioning |
|
0.0
|
0.0
|
|
| Net Operating Loss Carryforward |
|
2.6
|
0.0
|
|
| Deferred Tax Assets, Tax Credit Carryforwards [Abstract] |
|
|
|
|
| Tax Credit Carryforward |
|
41.0
|
0.0
|
|
| Operating Lease Liability |
|
14.6
|
15.5
|
|
| Investment in Partnership |
|
(0.7)
|
0.0
|
|
| All Other, Net |
|
4.8
|
21.8
|
|
| Net Deferred Tax Liabilities |
|
(1,152.7)
|
(1,101.1)
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Valuation Allowance |
|
|
0.0
|
|
| Income Tax Expense (Benefit) |
|
54.3
|
44.2
|
$ 34.4
|
| Operating Income (Loss) |
|
$ (469.9)
|
(413.7)
|
(385.2)
|
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |
|
|
|
|
| Deferred Revenue |
|
|
0.0
|
|
| Liability, Retirement and Postemployment Benefits |
|
|
0.0
|
|
| Ohio Power Co [Member] | Minimum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2036
|
|
|
| Ohio Power Co [Member] | Maximum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2041
|
|
|
| Public Service Co Of Oklahoma [Member] |
|
|
|
|
| Federal: |
|
|
|
|
| Current |
|
$ (60.8)
|
(3.3)
|
(109.6)
|
| Deferred |
|
2.9
|
(50.5)
|
105.6
|
| Total Federal |
|
(57.9)
|
(53.8)
|
(4.0)
|
| Current |
|
0.3
|
0.0
|
0.0
|
| Deferred |
|
4.0
|
4.6
|
8.1
|
| Total State and Local |
|
4.3
|
4.6
|
8.1
|
| Income Tax Expense (Benefit): |
|
|
|
|
| Income Tax Expense (Benefit) |
|
(53.6)
|
(49.2)
|
4.1
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Net Income |
|
208.8
|
167.6
|
141.1
|
| Income Tax Expense (Benefit) |
|
(53.6)
|
(49.2)
|
4.1
|
| Pretax Income |
|
155.2
|
118.4
|
145.2
|
| Income Taxes on Pretax Income at Statutory Rate (21%) |
|
32.6
|
24.9
|
30.5
|
| Reconciliation of Federal Statutory Rate and Amount of Taxes Reported |
|
|
|
|
| Depreciation |
|
0.4
|
0.0
|
0.0
|
| Investment Tax Credit Amortization |
|
(1.4)
|
(1.6)
|
(1.8)
|
| Production Tax Credits |
|
(64.3)
|
(47.7)
|
(6.0)
|
| State and Local Income Taxes, Net |
|
3.5
|
4.3
|
6.4
|
| Removal Costs |
|
0.0
|
0.0
|
0.0
|
| AFUDC |
|
(1.8)
|
0.0
|
0.0
|
| Effective Income Tax Rate Reconciliation, Parent Company Loss Benefit |
|
|
|
0.0
|
| Increase Decrease in Income Taxes Due to Tax Reserve Adjustments |
|
|
|
0.0
|
| Tax Reform Excess ADIT Reversal |
|
(23.3)
|
(25.4)
|
(25.4)
|
| Remeasurement of Excess ADIT |
|
0.0
|
|
|
| Federal Return to Provision |
|
0.6
|
(3.7)
|
0.7
|
| Disallowance Cost |
|
0.0
|
|
|
| Other |
|
0.1
|
0.0
|
(0.3)
|
| Income Tax Expense (Benefit) |
|
$ (53.6)
|
$ (49.2)
|
$ 4.1
|
| Effective Income Tax Rate |
|
(34.50%)
|
(41.60%)
|
2.80%
|
| Net Deferred Tax Liability and Significant Temporary Differences |
|
|
|
|
| Deferred Tax Assets |
|
$ 282.3
|
$ 225.0
|
|
| Deferred Tax Liabilities |
|
(1,113.5)
|
(1,013.6)
|
|
| Property Related Temporary Differences |
|
(817.2)
|
(763.3)
|
|
| Amounts Due from Customers for Future Federal Income Taxes |
|
88.6
|
96.0
|
|
| Deferred State Income Taxes |
|
(122.6)
|
(81.9)
|
|
| Securitized Assets |
|
0.0
|
0.0
|
|
| Regulatory Assets |
|
(83.8)
|
(140.2)
|
|
| Accrued Nuclear Decommissioning |
|
0.0
|
0.0
|
|
| Net Operating Loss Carryforward |
|
25.3
|
25.8
|
|
| Deferred Tax Assets, Tax Credit Carryforwards [Abstract] |
|
|
|
|
| Tax Credit Carryforward |
|
53.8
|
54.3
|
|
| Operating Lease Liability |
|
23.6
|
0.0
|
|
| Investment in Partnership |
|
0.0
|
0.0
|
|
| All Other, Net |
|
1.1
|
20.7
|
|
| Net Deferred Tax Liabilities |
|
(831.2)
|
(788.6)
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Valuation Allowance |
|
|
0.0
|
|
| Income Tax Expense (Benefit) |
|
(53.6)
|
(49.2)
|
$ 4.1
|
| Operating Income (Loss) |
|
$ (234.3)
|
(180.8)
|
(192.9)
|
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |
|
|
|
|
| Deferred Revenue |
|
|
0.0
|
|
| Liability, Retirement and Postemployment Benefits |
|
|
0.0
|
|
| Public Service Co Of Oklahoma [Member] | Minimum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2036
|
|
|
| Public Service Co Of Oklahoma [Member] | Maximum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2041
|
|
|
| Southwestern Electric Power Co [Member] |
|
|
|
|
| Federal: |
|
|
|
|
| Current |
|
$ (88.1)
|
(32.3)
|
(16.7)
|
| Deferred |
|
59.9
|
13.4
|
26.2
|
| Total Federal |
|
(28.2)
|
(18.9)
|
9.5
|
| Current |
|
1.0
|
(1.8)
|
0.4
|
| Deferred |
|
(6.1)
|
(4.5)
|
(10.5)
|
| Total State and Local |
|
(5.1)
|
(6.3)
|
(10.1)
|
| Income Tax Expense (Benefit): |
|
|
|
|
| Income Tax Expense (Benefit) |
|
(33.3)
|
(25.2)
|
(0.6)
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Net Income |
|
223.8
|
294.3
|
242.1
|
| Less: Equity Earnings |
|
(1.4)
|
(1.4)
|
(3.4)
|
| Income Tax Expense (Benefit) |
|
(33.3)
|
(25.2)
|
(0.6)
|
| Pretax Income |
|
189.1
|
267.7
|
238.1
|
| Income Taxes on Pretax Income at Statutory Rate (21%) |
|
39.7
|
56.2
|
50.0
|
| Reconciliation of Federal Statutory Rate and Amount of Taxes Reported |
|
|
|
|
| Depreciation |
|
2.1
|
2.3
|
1.8
|
| Investment Tax Credit Amortization |
|
(0.2)
|
0.0
|
0.0
|
| Production Tax Credits |
|
(67.1)
|
(57.1)
|
(7.2)
|
| State and Local Income Taxes, Net |
|
(4.0)
|
(4.9)
|
(8.0)
|
| Removal Costs |
|
0.0
|
0.0
|
0.0
|
| AFUDC |
|
(2.4)
|
0.0
|
0.0
|
| Effective Income Tax Rate Reconciliation, Parent Company Loss Benefit |
|
|
|
0.0
|
| Increase Decrease in Income Taxes Due to Tax Reserve Adjustments |
|
|
|
0.0
|
| Tax Reform Excess ADIT Reversal |
|
(12.6)
|
(14.8)
|
(31.1)
|
| Remeasurement of Excess ADIT |
|
0.0
|
|
|
| Federal Return to Provision |
|
1.0
|
0.0
|
0.0
|
| Disallowance Cost |
|
12.0
|
|
|
| Other |
|
(1.8)
|
(6.9)
|
(6.1)
|
| Income Tax Expense (Benefit) |
|
$ (33.3)
|
$ (25.2)
|
$ (0.6)
|
| Effective Income Tax Rate |
|
(17.60%)
|
(9.40%)
|
(0.30%)
|
| Net Deferred Tax Liability and Significant Temporary Differences |
|
|
|
|
| Deferred Tax Assets |
|
$ 441.5
|
$ 374.9
|
|
| Deferred Tax Liabilities |
|
(1,620.8)
|
(1,464.6)
|
|
| Property Related Temporary Differences |
|
(1,087.2)
|
(1,053.8)
|
|
| Amounts Due from Customers for Future Federal Income Taxes |
|
142.5
|
146.2
|
|
| Deferred State Income Taxes |
|
(238.6)
|
(208.7)
|
|
| Securitized Assets |
|
0.0
|
0.0
|
|
| Regulatory Assets |
|
(143.4)
|
(114.1)
|
|
| Accrued Nuclear Decommissioning |
|
0.0
|
0.0
|
|
| Net Operating Loss Carryforward |
|
47.5
|
42.7
|
|
| Deferred Tax Assets, Tax Credit Carryforwards [Abstract] |
|
|
|
|
| Tax Credit Carryforward |
|
68.6
|
66.0
|
|
| Operating Lease Liability |
|
26.3
|
0.0
|
|
| Investment in Partnership |
|
(1.3)
|
0.0
|
|
| All Other, Net |
|
6.3
|
32.0
|
|
| Net Deferred Tax Liabilities |
|
(1,179.3)
|
(1,089.7)
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Valuation Allowance |
|
|
0.0
|
|
| Income Tax Expense (Benefit) |
|
(33.3)
|
(25.2)
|
$ (0.6)
|
| Operating Income (Loss) |
|
$ (292.3)
|
(370.0)
|
(339.5)
|
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |
|
|
|
|
| Deferred Revenue |
|
|
0.0
|
|
| Liability, Retirement and Postemployment Benefits |
|
|
0.0
|
|
| Southwestern Electric Power Co [Member] | Minimum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2036
|
|
|
| Southwestern Electric Power Co [Member] | Maximum [Member] |
|
|
|
|
| Income Taxes (Textuals) [Abstract] |
|
|
|
|
| Tax Credit Carryforward, Expiration Date |
|
Dec. 31, 2041
|
|
|
| Arkansas |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 259.3
|
|
|
| Arkansas | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2024
|
|
|
| Arkansas | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2033
|
|
|
| Arkansas | Southwestern Electric Power Co [Member] | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2024
|
|
|
| Arkansas | Southwestern Electric Power Co [Member] | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2033
|
|
|
| Kentucky |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 204.1
|
|
|
| Kentucky | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2030
|
|
|
| Kentucky | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2037
|
|
|
| Louisiana |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 629.2
|
|
|
| Louisiana | Southwestern Electric Power Co [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
619.1
|
|
|
| Oklahoma |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 877.9
|
|
|
| Oklahoma | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2037
|
|
|
| Oklahoma | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2037
|
|
|
| Oklahoma | Public Service Co Of Oklahoma [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 947.1
|
|
|
| Oklahoma | Public Service Co Of Oklahoma [Member] | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2037
|
|
|
| Oklahoma | Public Service Co Of Oklahoma [Member] | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2037
|
|
|
| Tennessee |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 47.7
|
|
|
| Tennessee | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2032
|
|
|
| Tennessee | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2038
|
|
|
| Ohio Municipal |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 1,954.8
|
|
|
| Ohio Municipal | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2024
|
|
|
| Ohio Municipal | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2028
|
|
|
| Ohio Municipal | Ohio Power Co [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 152.3
|
|
|
| Ohio Municipal | Ohio Power Co [Member] | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2024
|
|
|
| Ohio Municipal | Ohio Power Co [Member] | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2028
|
|
|
| Colorado |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 80.8
|
|
|
| Pennsylvania | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2030
|
|
|
| Pennsylvania | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2043
|
|
|
| Illinois |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 54.4
|
|
|
| Federal |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
321.9
|
|
|
| Federal | AEP Texas Inc. [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
13.7
|
|
|
| Federal | Appalachian Power Co [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
0.1
|
|
|
| Federal | Indiana Michigan Power Co [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
7.2
|
|
|
| Federal | Ohio Power Co [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
41.0
|
|
|
| Federal | Public Service Co Of Oklahoma [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
53.8
|
|
|
| Federal | Southwestern Electric Power Co [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
68.6
|
|
|
| State and Local Jurisdiction |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
40.0
|
|
|
| State and Local Jurisdiction | AEP Texas Inc. [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
0.0
|
|
|
| State and Local Jurisdiction | Appalachian Power Co [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
0.0
|
|
|
| State and Local Jurisdiction | Indiana Michigan Power Co [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
0.0
|
|
|
| State and Local Jurisdiction | Ohio Power Co [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
0.0
|
|
|
| State and Local Jurisdiction | Public Service Co Of Oklahoma [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
40.0
|
|
|
| State and Local Jurisdiction | Southwestern Electric Power Co [Member] |
|
|
|
|
| Tax Credit Carryforward |
|
|
|
|
| Tax Credit Carryforward, Amount |
|
0.0
|
|
|
| MICHIGAN |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 45.6
|
|
|
| MICHIGAN | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2030
|
|
|
| MICHIGAN | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2032
|
|
|
| PENNSYLVANIA |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 47.8
|
|
|
| ILLINOIS | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2039
|
|
|
| ILLINOIS | Maximum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2041
|
|
|
| Arkansas | Southwestern Electric Power Co [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Net Income Tax Operating Loss Carryforward |
|
$ 258.9
|
|
|
| COLORADO | Minimum [Member] |
|
|
|
|
| Net Income Tax Operating Loss Carryforwards |
|
|
|
|
| Operating Loss Carryforwards, Expiration Date |
|
Dec. 31, 2041
|
|
|
| Dolet Hills Lignite Co, LLC [Member] |
|
|
|
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Less: Equity Earnings |
|
$ (1.4)
|
(1.4)
|
(3.4)
|
| Dolet Hills Lignite Co, LLC [Member] | Southwestern Electric Power Co [Member] |
|
|
|
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Less: Equity Earnings |
|
(1.4)
|
(1.4)
|
(3.4)
|
| Investment funds | AEP Texas Inc. [Member] |
|
|
|
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Less: Equity Earnings |
|
0.0
|
0.0
|
0.0
|
| Investment funds | AEP Transmission Co [Member] |
|
|
|
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Less: Equity Earnings |
|
0.0
|
0.0
|
0.0
|
| Investment funds | Appalachian Power Co [Member] |
|
|
|
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Less: Equity Earnings |
|
0.0
|
0.0
|
0.0
|
| Investment funds | Indiana Michigan Power Co [Member] |
|
|
|
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Less: Equity Earnings |
|
0.0
|
0.0
|
0.0
|
| Investment funds | Ohio Power Co [Member] |
|
|
|
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Less: Equity Earnings |
|
0.0
|
(0.6)
|
0.0
|
| Investment funds | Public Service Co Of Oklahoma [Member] |
|
|
|
|
| Reconciliation of Federal Income Taxes and Amount of Income Tax Reported |
|
|
|
|
| Less: Equity Earnings |
|
$ 0.0
|
$ 0.0
|
$ 0.0
|
|
|