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Variable Interest Entities (Tables) | 12 Months Ended
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Dec. 31, 2023
Consolidated Assets And Liabilities Of Variable Interest Entities |
December 31, 2023
| Consolidated VIEs
| SWEPCo Sabine |  | I&M DCC Fuel |  | AEP Texas Transition Funding |  | AEP Texas Restoration Funding |  | APCo Appalachian Consumer Rate Relief Funding |  | AEP Credit |  | Protected Cell of EIS |  | Transource Energy
| (in millions)
ASSETS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current Assets | $ | 4.2 |  |  | $ | 81.9 |  |  | $ | 25.5 |  |  | $ | 27.5 |  |  | $ | 13.3 |  |  | $ | 1,208.8 |  |  | $ | 205.3 |  |  | $ | 36.9 |
Net Property, Plant and Equipment | — |  |  | 153.8 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 533.4 |
Other Noncurrent Assets | 150.7 |  | 81.7 |  | 71.4 |  | (a) | 145.6 |  | (b) | 138.2 | (c) | 9.6 |  |  | — |  |  | 5.1 |
Total Assets | $ | 154.9 |  |  | $ | 317.4 |  |  | $ | 96.9 |  |  | $ | 173.1 |  |  | $ | 151.5 |  |  | $ | 1,218.4 |  |  | $ | 205.3 |  |  | $ | 575.4 |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current Liabilities | $ | 19.9 |  |  | $ | 81.7 |  |  | $ | 75.5 |  |  | $ | 36.8 |  |  | $ | 29.9 |  |  | $ | 1,155.0 |  |  | $ | 49.2 |  |  | $ | 45.3 |
Noncurrent Liabilities | 134.8 |  |  | 235.7 |  |  | 17.0 |  | 135.1 |  |  | 119.7 |  | 0.9 |  | 91.7 |  |  | 241.5 |
Equity | 0.2 |  | — |  |  | 4.4 |  | 1.2 |  | 1.9 |  | 62.5 |  |  | 64.4 |  |  | 288.6 |
Total Liabilities and Equity | $ | 154.9 |  |  | $ | 317.4 |  |  | $ | 96.9 |  |  | $ | 173.1 |  |  | $ | 151.5 |  |  | $ | 1,218.4 |  |  | $ | 205.3 |  |  | $ | 575.4 |
(a)Includes an intercompany item eliminated in consolidation of $8 million. (b)Includes an intercompany item eliminated in consolidation of $6 million. (c)Includes an intercompany item eliminated in consolidation of $2 million.
American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
December 31, 2022
| Registrant Subsidiaries |
| SWEPCo Sabine |  | I&M DCC Fuel |  | AEP Texas Transition Funding |  | AEP Texas Restoration Funding |  | APCo Appalachian Consumer Rate Relief Funding |
| (in millions) |
ASSETS |  |  |  |  |  |  |  |  |  |
Current Assets | $ | 108.3 |  |  | $ | 90.2 |  |  | $ | 27.0 |  |  | $ | 21.1 |  |  | $ | 13.5 |  |
Net Property, Plant and Equipment | 7.2 |  |  | 179.1 |  |  | — |  |  | — |  |  | — |  |
Other Noncurrent Assets | 130.0 |  |  | 94.0 |  |  | 140.9 |  | (a) | 168.8 |  | (b) | 164.6 |  | (c)
Total Assets | $ | 245.5 |  |  | $ | 363.3 |  |  | $ | 167.9 |  |  | $ | 189.9 |  |  | $ | 178.1 |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |  |  |
Current Liabilities | $ | 25.4 |  |  | $ | 90.0 |  |  | $ | 73.2 |  |  | $ | 31.3 |  |  | $ | 29.3 |  |
Noncurrent Liabilities | 219.4 |  |  | 273.3 |  |  | 90.4 |  |  | 157.4 |  |  | 146.9 |  |
Equity | 0.7 |  |  | — |  |  | 4.3 |  |  | 1.2 |  |  | 1.9 |  |
Total Liabilities and Equity | $ | 245.5 |  |  | $ | 363.3 |  |  | $ | 167.9 |  |  | $ | 189.9 |  |  | $ | 178.1 |  |
(a)Includes an intercompany item eliminated in consolidation of $16 million. (b)Includes an intercompany item eliminated in consolidation of $7 million. (c)Includes an intercompany item eliminated in consolidation of $2 million.
American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
December 31, 2022
| Other Consolidated VIEs
| AEP Credit |  | Protected Cell of EIS |  | Transource Energy |  |  |  | Apple Blossom and Black Oak |  | Santa Rita East |  | Dry Lake
| (in millions) |  |
ASSETS |  |  |  |  |  |  |  |  |  |  |  |  |
Current Assets | $ | 1,181.0 |  |  | $ | 194.5 |  |  | $ | 23.5 |  |  |  |  | $ | 8.3 |  |  | $ | 21.3 |  |  | $ | 4.0 |
Net Property, Plant and Equipment | — |  |  | — |  |  | 482.3 |  |  |  |  | 216.5 |  |  | 421.6 |  |  | 142.6 |
Other Noncurrent Assets | 9.0 |  |  | 0.3 |  |  | 2.7 |  |  |  |  | 13.6 |  |  | 0.1 |  |  | 0.3 |
Total Assets | $ | 1,190.0 |  |  | $ | 194.8 |  |  | $ | 508.5 |  |  |  |  | $ | 238.4 |  |  | $ | 443.0 |  |  | $ | 146.9 |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |  |  |  |  |  |
Current Liabilities | $ | 1,087.8 |  |  | $ | 46.4 |  |  | $ | 22.8 |  |  |  |  | $ | 4.5 |  |  | $ | 9.6 |  |  | $ | 1.0 |
Noncurrent Liabilities | 0.9 |  |  | 79.1 |  |  | 218.6 |  |  |  |  | 5.4 |  |  | 7.3 |  |  | 0.7 |
Equity | 101.3 |  |  | 69.3 |  |  | 267.1 |  |  |  |  | 228.5 |  |  | 426.1 |  |  | 145.2 |
Total Liabilities and Equity | $ | 1,190.0 |  |  | $ | 194.8 |  |  | $ | 508.5 |  |  |  |  | $ | 238.4 |  |  | $ | 443.0 |  |  | $ | 146.9 |
SWEPCo's Investment In DHLC |
| December 31,
| 2023 |  | 2022
| As Reported on the Balance Sheet |  | Maximum Exposure |  | As Reported on the Balance Sheet |  | Maximum Exposure
| (in millions)
Capital Contribution from SWEPCo | $ | 7.6 |  |  | $ | 7.6 |  |  | $ | 7.6 |  |  | $ | 7.6 |
Retained Earnings | 0.4 |  |  | 0.4 |  |  | 0.4 |  |  | 0.4 |
SWEPCo’s Share of Obligations | — |  |  | 19.2 |  |  | — |  |  | 36.8 |
Total Investment in DHLC | $ | 8.0 |  |  | $ | 27.2 |  |  | $ | 8.0 |  |  | $ | 44.8 |
AEP's Investment In OVEC |
| December 31,
| 2023 |  | 2022
| As Reported on the Balance Sheet |  | Maximum Exposure |  | As Reported on the Balance Sheet |  | Maximum Exposure
| (in millions)
Capital Contribution from AEP | $ | 4.4 |  |  | $ | 4.4 |  |  | $ | 4.4 |  |  | $ | 4.4 |
AEP’s Share of OVEC Debt (a) | — |  |  | 465.3 |  |  | — |  |  | 478.2 |
Total Investment in OVEC | $ | 4.4 |  |  | $ | 469.7 |  |  | $ | 4.4 |  |  | $ | 482.6 |
(a)Based on the Registrants’ power participation ratios, APCo, I&M and OPCo’s share of OVEC debt was $168 million, $84 million and $213 million as of December 31, 2023, respectively and $173 million, $86 million and $219 million as of December 31, 2022, respectively.
Purchased Power from OVEC |
|  | Years Ended December 31,
Company |  | 2023 |  | 2022 |  | 2021
|  | (in millions)
APCo |  | $ | 121.8 |  |  | $ | 119.3 |  |  | $ | 104.3 |
I&M |  | 60.9 |  |  | 59.7 |  |  | 52.2 |
OPCo |  | 154.7 |  |  | 151.8 |  |  | 133.0 |
Billings from Significant Variable Interest |
|  | Years Ended December 31,
Company |  | 2023 |  | 2022 |  | 2021
|  | (in millions)
AEP Texas |  | $ | 228.5 |  |  | $ | 236.8 |  |  | $ | 206.9 |
AEPTCo |  | 269.9 |  |  | 286.6 |  |  | 267.1 |
APCo |  | 324.9 |  |  | 347.5 |  |  | 313.3 |
I&M |  | 178.4 |  |  | 192.4 |  |  | 200.9 |
OPCo |  | 269.5 |  |  | 272.5 |  |  | 234.9 |
PSO |  | 138.6 |  |  | 142.3 |  |  | 123.7 |
SWEPCo |  | 185.1 |  |  | 192.5 |  |  | 168.6 |
Carrying Amount and Classification of Variable Interest in Accounts Payable |
|  | December 31,
|  | 2023 |  | 2022
Company |  | As Reported on the Balance Sheet |  | Maximum Exposure |  | As Reported on the Balance Sheet |  | Maximum Exposure
|  | (in millions)
AEP Texas |  | $ | 15.1 |  |  | $ | 15.1 |  |  | $ | 27.8 |  |  | $ | 27.8 |
AEPTCo |  | 17.9 |  |  | 17.9 |  |  | 31.6 |  |  | 31.6 |
APCo |  | 21.1 |  |  | 21.1 |  |  | 41.5 |  |  | 41.5 |
I&M |  | 14.3 |  |  | 14.3 |  |  | 27.7 |  |  | 27.7 |
OPCo |  | 19.0 |  |  | 19.0 |  |  | 31.1 |  |  | 31.1 |
PSO |  | 10.6 |  |  | 10.6 |  |  | 17.7 |  |  | 17.7 |
SWEPCo |  | 12.7 |  |  | 12.7 |  |  | 23.8 |  |  | 23.8 |

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- Definition AEP's investment in OVEC. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Billings from significant variable interest entity. + References No definition available. + Details
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Period Type: | duration

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- Definition The carrying amount and classification of variable interest in accounts payable. + References No definition available. + Details
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Namespace Prefix: | aep_
Data Type: | dtr-types1:textBlockItemType
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- Definition Schedule of consolidated assets and liabilities of variable interest entities. + References No definition available. + Details
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Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
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- Definition Tabular disclosure of purchased power from OVEC. + References No definition available. + Details
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Namespace Prefix: | aep_
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Balance Type: | na
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- Definition SWEPCo's investment in DHLC. + References No definition available. + Details
Name: | aep_SWEPCosInvestmentInDHLCTableTextBlock
Namespace Prefix: | aep_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration