XML 145 R76.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Variable Interest Entities (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) MW | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 6,082,100 |  | $ 6,775,500 |  |  |
Net Property, Plant and Equipment |  | 76,693,400 |  | 73,339,100 |  |  |
Other Noncurrent Assets |  | 13,908,500 |  | 13,288,700 |  |  |
Total Assets |  | 96,684,000 |  | 93,403,300 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 11,583,600 |  | 13,266,300 |  |  |
Noncurrent Liabilities |  | 59,772,000 |  | 55,968,700 |  |  |
Equity |  | 25,285,900 |  | 24,122,400 |  | $ 22,680,200 | $ 20,774,500
Total Liabilities and Equity |  | 96,684,000 |  | 93,403,300 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 368,900 |  | 487,800 |  |  |
Securitized Assets |  | $ 336,300 |  | 446,000 |  |  |
Equity Method Investment, Ownership Percentage |  | 50.00% |  |  |  |  |
Equity Method Investments |  | $ 1,073,600 |  | 1,276,700 |  | 1,447,500 |
Equity Method Investment Income |  | (58,500) |  | 109,400 |  | (91,700) |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 2,032,500 |  | 2,670,800 |  |  |
Generation and Marketing [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Total Assets |  | 2,598,500 |  | 4,520,100 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investments |  | 100,600 |  | 337,600 |  | 487,800 |
Equity Method Investment Income |  | 16,500 |  | 192,400 |  | 10,600 |
Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 564,300 |  | 2,031,600 |  |  |
Protected Cell Of Energy Insurance Services, Inc. [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Insurance Premium Expense to Protected Cell |  | 34,000 |  | 31,000 |  | 30,000 |
Protected Cell Of Energy Insurance Services, Inc. [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 205,300 |  | 194,500 |  |  |
Net Property, Plant and Equipment |  | 0 |  | 0 |  |  |
Other Noncurrent Assets |  | 0 |  | 300 |  |  |
Total Assets |  | 205,300 |  | 194,800 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 49,200 |  | 46,400 |  |  |
Noncurrent Liabilities |  | 91,700 |  | 79,100 |  |  |
Equity |  | 64,400 |  | 69,300 |  |  |
Total Liabilities and Equity |  | $ 205,300 |  | 194,800 |  |  |
Transource Energy [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Debt-to-Total Capitalization Maximum |  | 67.50% |  |  |  |  |
Transource Energy [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 36,900 |  | 23,500 |  |  |
Net Property, Plant and Equipment |  | 533,400 |  | 482,300 |  |  |
Other Noncurrent Assets |  | 5,100 |  | 2,700 |  |  |
Total Assets |  | 575,400 |  | 508,500 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 45,300 |  | 22,800 |  |  |
Noncurrent Liabilities |  | 241,500 |  | 218,600 |  |  |
Equity |  | 288,600 |  | 267,100 |  |  |
Total Liabilities and Equity |  | $ 575,400 |  | 508,500 |  |  |
Santa Rita East [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Noncontrolling Interest in Variable Interest Entity |  |  |  | 58,000 |  |  |
Santa Rita East [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  |  |  | 21,300 |  |  |
Net Property, Plant and Equipment |  |  |  | 421,600 |  |  |
Other Noncurrent Assets |  |  |  | 100 |  |  |
Total Assets |  |  |  | 443,000 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  |  |  | 9,600 |  |  |
Noncurrent Liabilities |  |  |  | 7,300 |  |  |
Equity |  |  |  | 426,100 |  |  |
Total Liabilities and Equity |  |  |  | 443,000 |  |  |
AEP Credit, Inc. |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Minimum Percentage of Equity AEP Provides |  | 5.00% |  |  |  |  |
Percentage Of Short Term Borrowing Needs In Excess Of Third Party Financings |  | 35.00% |  |  |  |  |
AEP Credit, Inc. | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 1,208,800 |  | 1,181,000 |  |  |
Net Property, Plant and Equipment |  | 0 |  | 0 |  |  |
Other Noncurrent Assets |  | 9,600 |  | 9,000 |  |  |
Total Assets |  | 1,218,400 |  | 1,190,000 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1,155,000 |  | 1,087,800 |  |  |
Noncurrent Liabilities |  | 900 |  | 900 |  |  |
Equity |  | 62,500 |  | 101,300 |  |  |
Total Liabilities and Equity |  | 1,218,400 |  | 1,190,000 |  |  |
Dolet Hills Lignite Co, LLC [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investment Income |  | $ (1,400) |  | (1,400) |  | (3,400) |
Ohio Valley Electric Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
AEP's Ownership In OVEC |  | 43.47% |  |  |  |  |
Approximate OVEC Generating Capacity (MWs) | MW |  | 2,400 |  |  |  |  |
Intercompany Power Agreement End Date |  | 2040 |  |  |  |  |
Outstanding Indebtedness |  | $ 1,100,000 |  | 1,100,000 |  |  |
Dry Lake Solar Project [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Noncontrolling Interest in Variable Interest Entity |  |  |  | 34,000 |  |  |
Dry Lake Solar Project [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Percentage of an Asset Acquired |  | 75.00% |  |  |  |  |
Dry Lake Solar Project [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  |  |  | 4,000 |  |  |
Net Property, Plant and Equipment |  |  |  | 142,600 |  |  |
Other Noncurrent Assets |  |  |  | 300 |  |  |
Total Assets |  |  |  | 146,900 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  |  |  | 1,000 |  |  |
Noncurrent Liabilities |  |  |  | 700 |  |  |
Equity |  |  |  | 145,200 |  |  |
Total Liabilities and Equity |  |  |  | 146,900 |  |  |
Apple Blossom and Black Oak [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Noncontrolling Interest in Variable Interest Entity |  |  |  | 94,000 |  |  |
Apple Blossom and Black Oak [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  |  |  | 8,300 |  |  |
Net Property, Plant and Equipment |  |  |  | 216,500 |  |  |
Other Noncurrent Assets |  |  |  | 13,600 |  |  |
Total Assets |  |  |  | 238,400 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  |  |  | 4,500 |  |  |
Noncurrent Liabilities |  |  |  | 5,400 |  |  |
Equity |  |  |  | 228,500 |  |  |
Total Liabilities and Equity |  |  |  | 238,400 |  |  |
Capital Contribution From Parent [Member] | Ohio Valley Electric Corporation [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | $ 4,400 |  | 4,400 |  |  |
Maximum Exposure |  | 4,400 |  | 4,400 |  |  |
Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 12,800,400 |  | 12,345,600 |  | 11,667,100 | 10,687,800
AEP's Ratio of OVEC Debt [Member] | Ohio Valley Electric Corporation [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet | [1] | 0 |  | 0 |  |  |
Maximum Exposure | [1] | 465,300 |  | 478,200 |  |  |
Total Investment [Member] | Ohio Valley Electric Corporation [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 4,400 |  | 4,400 |  |  |
Maximum Exposure |  | $ 469,700 |  | 482,600 |  |  |
Great Plains Energy Inc. [Member] | Transource Energy [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity and Voting Ownership Percentage |  | 13.50% |  |  |  |  |
Cleco Power, LLC [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Percentage of VIE Sales of Lignite Produced |  | 50.00% |  |  |  |  |
AEP Transmission Co [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 278,800 |  | 188,700 |  |  |
Net Property, Plant and Equipment |  | 14,497,700 |  | 13,339,900 |  |  |
Other Noncurrent Assets |  | 296,000 |  | 285,600 |  |  |
Total Assets |  | 15,072,500 |  | 13,814,200 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1,286,100 |  | 1,368,000 |  |  |
Noncurrent Liabilities |  | 7,453,100 |  | 6,573,200 |  |  |
Total Liabilities and Equity |  | 15,072,500 |  | 13,814,200 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 274,700 |  | 427,800 |  |  |
AEP Transmission Co [Member] | Related Party |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 107,900 |  | 82,700 |  |  |
AEP Transmission Co [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 300 |  | 300 |  |  |
AEP Transmission Co [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 269,900 |  | 286,600 |  | 267,100 |
AEP Transmission Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 17,900 |  | 31,600 |  |  |
Maximum Exposure |  | 17,900 |  | 31,600 |  |  |
Appalachian Power Co [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 1,059,000 |  | 1,259,600 |  |  |
Net Property, Plant and Equipment |  | 12,931,500 |  | 12,379,200 |  |  |
Other Noncurrent Assets |  | 1,721,400 |  | 1,583,400 |  |  |
Total Assets |  | 15,711,900 |  | 15,222,200 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1,685,900 |  | 1,390,200 |  |  |
Noncurrent Liabilities |  | 8,749,300 |  | 8,856,600 |  |  |
Equity |  | 5,276,700 |  | 4,975,400 |  | 4,647,900 | 4,344,300
Total Liabilities and Equity |  | 15,711,900 |  | 15,222,200 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 147,000 |  | 173,300 |  |  |
Securitized Assets |  | 133,400 |  | 159,600 |  |  |
Amount Of Power Purchased From OVEC |  | 121,800 |  | 119,300 |  | 104,300 |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 280,400 |  | 451,200 |  |  |
Appalachian Power Co [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 32,900 |  | 29,400 |  |  |
Appalachian Power Co [Member] | Appalachian Consumer Rate Relief Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitized Assets |  | 133,000 |  | 160,000 |  |  |
Appalachian Power Co [Member] | Appalachian Consumer Rate Relief Funding [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 13,300 |  | 13,500 |  |  |
Net Property, Plant and Equipment |  | 0 |  | 0 |  |  |
Other Noncurrent Assets |  | 138,200 | [2] | 164,600 | [3] |  |
Total Assets |  | 151,500 |  | 178,100 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 29,900 |  | 29,300 |  |  |
Noncurrent Liabilities |  | 119,700 |  | 146,900 |  |  |
Equity |  | 1,900 |  | 1,900 |  |  |
Total Liabilities and Equity |  | $ 151,500 |  | 178,100 |  |  |
Appalachian Power Co [Member] | Ohio Valley Electric Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Power Participation Ratio |  | 15.69% |  |  |  |  |
Outstanding Indebtedness |  | $ 168,000 |  | 173,000 |  |  |
Appalachian Power Co [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 324,900 |  | 347,500 |  | 313,300 |
Appalachian Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 21,100 |  | 41,500 |  |  |
Maximum Exposure |  | 21,100 |  | 41,500 |  |  |
Appalachian Power Co [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 3,185,500 |  | 2,891,100 |  | 2,534,400 | 2,248,000
Appalachian Power Co [Member] | Other Noncurrent Assets [Member] | Appalachian Consumer Rate Relief Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Intercompany Item Eliminated in Consolidation |  | 2,000 |  | 2,000 |  |  |
Appalachian Power Co [Member] | Current Liabilities [Member] | Appalachian Consumer Rate Relief Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 27,000 |  | 26,000 |  |  |
Appalachian Power Co [Member] | Noncurrent Liabilities [Member] | Appalachian Consumer Rate Relief Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 120,000 |  | 147,000 |  |  |
Indiana Michigan Power Co [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 528,000 |  | 571,800 |  |  |
Net Property, Plant and Equipment |  | 7,629,000 |  | 7,411,500 |  |  |
Other Noncurrent Assets |  | 4,651,000 |  | 4,135,600 |  |  |
Total Assets |  | 12,808,000 |  | 12,118,900 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 830,200 |  | 1,197,100 |  |  |
Noncurrent Liabilities |  | 8,837,600 |  | 7,913,500 |  |  |
Equity |  | 3,140,200 |  | 3,008,300 |  | 2,784,700 | 2,749,200
Total Liabilities and Equity |  | 12,808,000 |  | 12,118,900 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Amount Of Power Purchased From OVEC |  | 60,900 |  | 59,700 |  | 52,200 |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 225,800 |  | 173,400 |  |  |
Indiana Michigan Power Co [Member] | Related Party |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 107,300 |  | 121,500 |  |  |
Indiana Michigan Power Co [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 82,700 |  | 78,700 |  |  |
Indiana Michigan Power Co [Member] | DCC Fuel [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Payments Made by I&M to DCC Fuel |  | $ 97,000 |  | 84,000 |  | 91,000 |
Capital Lease Term |  | 54 months |  |  |  |  |
Indiana Michigan Power Co [Member] | DCC Fuel [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 81,900 |  | 90,200 |  |  |
Net Property, Plant and Equipment |  | 153,800 |  | 179,100 |  |  |
Other Noncurrent Assets |  | 81,700 |  | 94,000 |  |  |
Total Assets |  | 317,400 |  | 363,300 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 81,700 |  | 90,000 |  |  |
Noncurrent Liabilities |  | 235,700 |  | 273,300 |  |  |
Equity |  | 0 |  | 0 |  |  |
Total Liabilities and Equity |  | $ 317,400 |  | 363,300 |  |  |
Indiana Michigan Power Co [Member] | Ohio Valley Electric Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Power Participation Ratio |  | 7.85% |  |  |  |  |
Outstanding Indebtedness |  | $ 84,000 |  | 86,000 |  |  |
Indiana Michigan Power Co [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 178,400 |  | 192,400 |  | 200,900 |
Indiana Michigan Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 14,300 |  | 27,700 |  |  |
Maximum Exposure |  | 14,300 |  | 27,700 |  |  |
Indiana Michigan Power Co [Member] | Billings from AEP Generating Company [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 181,000 |  | 242,000 |  | 218,000 |
Indiana Michigan Power Co [Member] | Carrying Amount in AEP Generating Company's Accounts Payable [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 15,000 |  | 17,000 |  |  |
Indiana Michigan Power Co [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 2,086,600 |  | 1,963,200 |  | 1,748,500 | 1,718,700
Ohio Power Co [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 377,800 |  | 414,400 |  |  |
Net Property, Plant and Equipment |  | 9,299,900 |  | 8,609,300 |  |  |
Other Noncurrent Assets |  | 1,166,000 |  | 979,400 |  |  |
Total Assets |  | 10,843,700 |  | 10,003,100 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1,614,300 |  | 1,635,500 |  |  |
Noncurrent Liabilities |  | 5,658,100 |  | 5,279,500 |  |  |
Equity |  | 3,571,300 |  | 3,088,100 |  | 2,846,300 | 2,692,700
Total Liabilities and Equity |  | 10,843,700 |  | 10,003,100 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Amount Of Power Purchased From OVEC |  | 154,700 |  | 151,800 |  | 133,000 |
Equity Method Investment Income |  | 0 |  | (600) |  | 0 |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 320,700 |  | 337,300 |  |  |
Ohio Power Co [Member] | Related Party |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 154,200 |  | 126,100 |  |  |
Ohio Power Co [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | $ 9,700 |  | 9,800 |  |  |
Ohio Power Co [Member] | Ohio Valley Electric Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
AEP's Ownership In OVEC |  | 4.30% |  |  |  |  |
Power Participation Ratio |  | 19.93% |  |  |  |  |
Outstanding Indebtedness |  | $ 213,000 |  | 219,000 |  |  |
Ohio Power Co [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 269,500 |  | 272,500 |  | 234,900 |
Ohio Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 19,000 |  | 31,100 |  |  |
Maximum Exposure |  | 19,000 |  | 31,100 |  |  |
Ohio Power Co [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 2,237,300 |  | 1,929,100 |  | 1,686,300 | 1,532,700
Public Service Co Of Oklahoma [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 469,500 |  | 491,500 |  |  |
Net Property, Plant and Equipment |  | 6,112,300 |  | 5,626,500 |  |  |
Other Noncurrent Assets |  | 753,100 |  | 847,900 |  |  |
Total Assets |  | 7,334,900 |  | 6,965,900 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 559,000 |  | 842,700 |  |  |
Noncurrent Liabilities |  | 4,205,300 |  | 3,704,100 |  |  |
Equity |  | 2,570,600 |  | 2,419,100 |  | 2,291,600 | 1,545,600
Total Liabilities and Equity |  | 7,334,900 |  | 6,965,900 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 159,300 |  | 202,900 |  |  |
Public Service Co Of Oklahoma [Member] | Related Party |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 56,700 |  | 76,700 |  |  |
Public Service Co Of Oklahoma [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 4,900 |  | 5,000 |  |  |
Public Service Co Of Oklahoma [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 138,600 |  | 142,300 |  | 123,700 |
Public Service Co Of Oklahoma [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 10,600 |  | 17,700 |  |  |
Maximum Exposure |  | 10,600 |  | 17,700 |  |  |
Public Service Co Of Oklahoma [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 1,374,300 |  | 1,218,000 |  | 1,095,400 | 974,300
Southwestern Electric Power Co [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 541,300 |  | 812,200 |  |  |
Net Property, Plant and Equipment |  | 8,558,400 |  | 8,262,200 |  |  |
Other Noncurrent Assets |  | 1,457,900 |  | 1,304,400 |  |  |
Total Assets |  | 10,557,600 |  | 10,378,800 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 686,900 |  | 947,700 |  |  |
Noncurrent Liabilities |  | 6,100,300 |  | 5,756,300 |  |  |
Equity |  | 3,770,400 |  | 3,674,800 |  | 3,149,800 | 2,627,700
Total Liabilities and Equity |  | 10,557,600 |  | 10,378,800 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investment Income |  | (1,400) |  | (1,400) |  | (3,400) |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 198,900 |  | 213,100 |  |  |
Southwestern Electric Power Co [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 23,900 |  | 9,300 |  |  |
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 101,000 |  | 168,000 |  | 162,000 |
Guarantees Of Mine Reclamation Amount |  | 155,000 |  |  |  |  |
Estimated Final Cost Mine Reclamation |  | 144,000 |  |  |  |  |
Amount Collected Through Rider For Final Mine Closure And Reclamation Costs |  | $ 92,000 |  |  |  |  |
Reclamation Complete Date |  | 2037 |  |  |  |  |
Amount Recorded In ARO For Final Mine Closure And Reclamation Costs |  | $ 134,000 |  |  |  |  |
Amount Recorded In Other Noncurrent Assets For Final Mine Closure And Reclamation Costs |  | 76,000 |  |  |  |  |
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member] | Related Party |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 34,000 |  |  |  |  |
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 4,200 |  | 108,300 |  |  |
Net Property, Plant and Equipment |  | 0 |  | 7,200 |  |  |
Other Noncurrent Assets |  | 150,700 |  | 130,000 |  |  |
Total Assets |  | 154,900 |  | 245,500 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 19,900 |  | 25,400 |  |  |
Noncurrent Liabilities |  | 134,800 |  | 219,400 |  |  |
Equity |  | 200 |  | 700 |  |  |
Total Liabilities and Equity |  | $ 154,900 |  | 245,500 |  |  |
Southwestern Electric Power Co [Member] | Dolet Hills Lignite Co, LLC [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  |  |  |  |  | 47,000 |
Percentage of VIE Sales of Lignite Produced |  | 50.00% |  |  |  |  |
Percentage of DHLCs Debt Guaranteed by Each SWEPCo and CLECO |  | 50.00% |  |  |  |  |
Percentage of Management Fee Received by SWEPCo from DHLC |  | 100.00% |  |  |  |  |
Equity Method Investment Income |  | $ (1,400) |  | (1,400) |  | (3,400) |
Dividends |  | 1,000 |  | 25,000 |  | 0 |
Southwestern Electric Power Co [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 185,100 |  | 192,500 |  | 168,600 |
Southwestern Electric Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 12,700 |  | 23,800 |  |  |
Maximum Exposure |  | 12,700 |  | 23,800 |  |  |
Southwestern Electric Power Co [Member] | Capital Contribution From Parent [Member] | Dolet Hills Lignite Co, LLC [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 7,600 |  | 7,600 |  |  |
Maximum Exposure |  | 7,600 |  | 7,600 |  |  |
Southwestern Electric Power Co [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 2,281,300 |  | 2,236,000 |  | 2,050,900 | 1,811,900
Southwestern Electric Power Co [Member] | Retained Earnings [Member] | Dolet Hills Lignite Co, LLC [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 400 |  | 400 |  |  |
Maximum Exposure |  | 400 |  | 400 |  |  |
Southwestern Electric Power Co [Member] | SWEPCo's Share of Obligations [Member] | Dolet Hills Lignite Co, LLC [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 0 |  | 0 |  |  |
Maximum Exposure |  | 19,200 |  | 36,800 |  |  |
Southwestern Electric Power Co [Member] | Total Investment [Member] | Dolet Hills Lignite Co, LLC [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 8,000 |  | 8,000 |  |  |
Maximum Exposure |  | $ 27,200 |  | 44,800 |  |  |
AEP Generating Co [Member] | Rockport Generating Plant |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Jointly Owned Utility Plant, Proportionate Ownership Share |  | 50.00% |  |  |  |  |
Transource Energy [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity and Voting Ownership Percentage |  | 86.50% |  |  |  |  |
AEP Texas Inc. [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 520,100 |  | 446,900 |  |  |
Net Property, Plant and Equipment |  | 12,774,000 |  | 11,681,600 |  |  |
Other Noncurrent Assets |  | 696,600 |  | 763,700 |  |  |
Total Assets |  | 13,990,700 |  | 12,892,200 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 749,400 |  | 1,043,800 |  |  |
Noncurrent Liabilities |  | 8,445,200 |  | 7,944,100 |  |  |
Equity |  | 4,796,100 |  | 3,904,300 |  | 3,594,200 | 3,206,000
Total Liabilities and Equity |  | 13,990,700 |  | 12,892,200 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 221,800 |  | 314,400 |  |  |
Securitized Assets |  | 202,900 |  | 286,400 |  |  |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 192,300 |  | 331,000 |  |  |
AEP Texas Inc. [Member] | Related Party |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo |  | 27,700 |  | 34,700 |  |  |
AEP Texas Inc. [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 1,800 |  | 1,200 |  |  |
AEP Texas Inc. [Member] | AEP Texas Central Transition Funding Co [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitized Assets |  | 64,000 |  | 125,000 |  |  |
AEP Texas Inc. [Member] | AEP Texas Central Transition Funding Co [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 25,500 |  | 27,000 |  |  |
Net Property, Plant and Equipment |  | 0 |  | 0 |  |  |
Other Noncurrent Assets |  | 71,400 | [4] | 140,900 | [5] |  |
Total Assets |  | 96,900 |  | 167,900 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 75,500 |  | 73,200 |  |  |
Noncurrent Liabilities |  | 17,000 |  | 90,400 |  |  |
Equity |  | 4,400 |  | 4,300 |  |  |
Total Liabilities and Equity |  | 96,900 |  | 167,900 |  |  |
AEP Texas Inc. [Member] | Restoration Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitized Assets |  | 139,000 |  | 161,000 |  |  |
AEP Texas Inc. [Member] | Restoration Funding [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 27,500 |  | 21,100 |  |  |
Net Property, Plant and Equipment |  | 0 |  | 0 |  |  |
Other Noncurrent Assets |  | 145,600 | [6] | 168,800 | [7] |  |
Total Assets |  | 173,100 |  | 189,900 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 36,800 |  | 31,300 |  |  |
Noncurrent Liabilities |  | 135,100 |  | 157,400 |  |  |
Equity |  | 1,200 |  | 1,200 |  |  |
Total Liabilities and Equity |  | 173,100 |  | 189,900 |  |  |
AEP Texas Inc. [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 228,500 |  | 236,800 |  | 206,900 |
AEP Texas Inc. [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member] |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  |  |  |  |  |
As Reported on the Balance Sheet |  | 15,100 |  | 27,800 |  |  |
Maximum Exposure |  | 15,100 |  | 27,800 |  |  |
AEP Texas Inc. [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 2,725,100 |  | 2,354,700 |  | 2,046,800 | $ 1,757,000
AEP Texas Inc. [Member] | Other Noncurrent Assets [Member] | AEP Texas Central Transition Funding Co [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Intercompany Item Eliminated in Consolidation |  | 8,000 |  | 16,000 |  |  |
AEP Texas Inc. [Member] | Other Noncurrent Assets [Member] | Restoration Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Intercompany Item Eliminated in Consolidation |  | 6,000 |  | 7,000 |  |  |
AEP Texas Inc. [Member] | Current Liabilities [Member] | AEP Texas Central Transition Funding Co [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 72,000 |  | 70,000 |  |  |
AEP Texas Inc. [Member] | Current Liabilities [Member] | Restoration Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 24,000 |  | 24,000 |  |  |
AEP Texas Inc. [Member] | Noncurrent Liabilities [Member] | AEP Texas Central Transition Funding Co [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  |  |  | 71,000 |  |  |
AEP Texas Inc. [Member] | Noncurrent Liabilities [Member] | Restoration Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | $ 126,000 |  | 150,000 |  |  |
Parent Company [Member] | Ohio Valley Electric Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
AEP's Ownership In OVEC |  | 39.17% |  |  |  |  |
Joint Venture Wind Farms [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investments |  |  |  | 247,000 |  |  |
Equity Method Investment Income |  | $ (278) |  | (194,000) |  | (12,000) |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity |  |  |  | 62,000 |  |  |
Berkshire Hathaway [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 50.00% |  |  |  |  |
AEP Transmission Holdco [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 50.00% |  |  |  |  |
BP Wind Energy [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 50.00% |  |  |  |  |
ETT [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investments |  | $ 811,000 |  | 762,000 |  |  |
Equity Method Investment Income |  | $ 74,000 |  | $ 74,000 |  | $ 66,000 |
[1] | 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.
[2] | Includes an intercompany item eliminated in consolidation of $2 million.
[3] | Includes an intercompany item eliminated in consolidation of $2 million.
[4] | Includes an intercompany item eliminated in consolidation of $8 million.
[5] | Includes an intercompany item eliminated in consolidation of $16 million.
[6] | Includes an intercompany item eliminated in consolidation of $6 million.
[7] | Includes an intercompany item eliminated in consolidation of $7 million.

X
- Definition Total amount collected through a rider for final mine closure and reclamation costs. + References No definition available. + Details
Name: | aep_AmountCollectedThroughRiderForFinalMineClosureAndReclamationCosts
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of power purchased by the Registrant Subsidiaries from OVEC. + References No definition available. + Details
Name: | aep_AmountOfPowerPurchasedFromOVEC
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount recorded for final mine closure and reclamation costs in asset retirement obligations. + References No definition available. + Details
Name: | aep_AssetRetirementObligationsMineCloseARONoncurrent
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount recorded for final mine closure and reclamation costs in deferred charges and other noncurrent assets. + References No definition available. + Details
Name: | aep_AssetRetirementObligationsMineCloseOtherAssetsNoncurrent
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Billings from VIE. + References No definition available. + Details
Name: | aep_BillingsFromVie
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Capital lease payments made by I&M to DCC Fuel. + References No definition available. + Details
Name: | aep_CapitalLeasePaymentsMade
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Capital Lease Terms Maximum + References No definition available. + Details
Name: | aep_CapitalLeaseTermsMaximum
Namespace Prefix: | aep_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents the ownership percentage of all cost-method investments. + References No definition available. + Details
Name: | aep_CostMethodInvestmentOwnershipPercentage
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Transource Energy's credit facility agreement debt-to-total capitalization percentage maximum. + References No definition available. + Details
Name: | aep_DebttoTotalCapitalizationMaximum
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Equity And Voting Ownership Percentage + References No definition available. + Details
Name: | aep_EquityAndVotingOwnershipPercentage
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Guarantees of mine reclamation, amount. + References No definition available. + Details
Name: | aep_GuaranteesOfMineReclamationAmount
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Insurance premium expense to protected cell. + References No definition available. + Details
Name: | aep_InsurancePremiumExpenseToProtectedCell
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Intercompany power agreement end date related to OVEC. + References No definition available. + Details
Name: | aep_IntercompanyPowerAgreementEndDate
Namespace Prefix: | aep_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum percentage of equity AEP Parent provides to AEP Credit. + References No definition available. + Details
Name: | aep_MinimumPercentageOfEquityAepProvides
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Outstanding Indebtedness + References No definition available. + Details
Name: | aep_OutstandingIndebtedness
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of an asset acquired when AEP does not purchase the entire asset. + References No definition available. + Details
Name: | aep_PercentageOfAnAssetAcquired
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of short-term borrowing needs in excess of third party financings provided by AEP to AEP Credit. + References No definition available. + Details
Name: | aep_PercentageOfShortTermBorrowingNeedsInExcessOfThirdPartyFinancings
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of DHLCs debt guaranteed by each SWEPCo and CLECO. + References No definition available. + Details
Name: | aep_PercentageOfVieDebtGuaranteed
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of management fee received by SWEPCo from DHLC. + References No definition available. + Details
Name: | aep_PercentageOfVieManagementFeeReceived
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of VIE sales of lignite produced. + References No definition available. + Details
Name: | aep_PercentageOfVieSalesOfLigniteProduced
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Power participation ratio + References No definition available. + Details
Name: | aep_PowerParticipationRatio
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Reclamation Complete Date related to Sabine. + References No definition available. + Details
Name: | aep_ReclamationCompleteDate
Namespace Prefix: | aep_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of unearned revenue that will be recognized over a future period of time consistent with the repayment of Transition Funding III's bond principal balance. + References No definition available. + Details
Name: | aep_UnearnedRevenue
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Generating capacity of utility plants. + References No definition available. + Details
Name: | aep_UtilityPlantGenerationCapacity
Namespace Prefix: | aep_
Data Type: | dtr-types1:powerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Variable Interest Carrying Amount Assets. + References No definition available. + Details
Name: | aep_VariableInterestCarryingAmountAssetsAbstract
Namespace Prefix: | aep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Variable Interest Carrying Amount Liabilities And Equity. + References No definition available. + Details
Name: | aep_VariableInterestCarryingAmountLiabilitiesAndEquityAbstract
Namespace Prefix: | aep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | aep_VariableInterestEntitiesTextualsAbstract
Namespace Prefix: | aep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_AccountsPayableCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (bb) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481231/810-10-45-25 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-28 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480167/946-830-55-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(8)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(18)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 13: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 23: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481404/852-10-50-7 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 26: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (bb) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481231/810-10-45-25 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-28 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(9)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 20: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481404/852-10-50-7 + Details
Name: | us-gaap_AssetsCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (bb) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481231/810-10-45-25 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-28 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481404/852-10-50-7 + Details
Name: | us-gaap_AssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 2 -SubTopic 405 -Topic 942 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481071/942-405-45-2 + Details
Name: | us-gaap_Dividends
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + Details
Name: | us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481664/323-10-45-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(10)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 25 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-25 + Details
Name: | us-gaap_EquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481664/323-10-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(f)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 + Details
Name: | us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of investment in equity method investee and investment in and advance to affiliate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(18)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportionate share of interest (percent) in a jointly owned utility plant. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479960/980-360-S99-1 + Details
Name: | us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(25)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-28 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(23)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(32)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LiabilitiesAndStockholdersEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481231/810-10-45-25 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (bb) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-28 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-5 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 19: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481404/852-10-50-7 Reference 20: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481404/852-10-50-7 Reference 21: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.21) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LiabilitiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of obligation due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481231/810-10-45-25 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (bb) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-28 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B Reference 18: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481404/852-10-50-7 Reference 19: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481404/852-10-50-7 Reference 20: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(23)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 21: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 201.5-02(24)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 22: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 201.5-02(25)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 23: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 201.5-02(26)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of a reclamation and mine closing liability that is associated with a legal obligation for the closure and reclamation of a mine including the removal of buildings, equipment, machinery and other physical remnants of mining, closure of tailings impoundments, leach pads and other mine features, and contouring, covering and revegetation of waste rock piles and other disturbed areas. + References No definition available. + Details
Name: | us-gaap_MineReclamationAndClosingLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Portion of equity (net assets) in a variable interest entity (VIE) not attributable, directly or indirectly, to the parent entity. That is, this is the portion of equity in a VIE that is attributable to the noncontrolling interest (previously referred to as minority interest). + References No definition available. + Details
Name: | us-gaap_NoncontrollingInterestInVariableInterestEntity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 360 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480842/942-360-50-1 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
Name: | us-gaap_SecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value of the regulatory asset that represents capitalized stranded costs that have been securitized (financed with debt) and are expected to be recoverable through a transition charge after one year (or beyond the operating cycle if longer). A transition charge is a charge approved by a regulator that allows deregulated utilities to recover investments in certain assets, such as power plants, over a transition period leading into a deregulated market. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 860 -SubTopic 10 -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481239/860-10-55-7 + Details
Name: | us-gaap_SecuritizedRegulatoryTransitionAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483421/250-10-45-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 23 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483421/250-10-45-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483421/250-10-45-5 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 5 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479654/326-10-65-5 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 65 -Paragraph 6 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480528/815-20-65-6 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 65 -Paragraph 6 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480528/815-20-65-6 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 65 -Paragraph 6 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480528/815-20-65-6 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 65 -Paragraph 6 -Subparagraph (h)(1)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480528/815-20-65-6 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 65 -Paragraph 6 -Subparagraph (h)(1)(iv) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480528/815-20-65-6 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 65 -Paragraph 6 -Subparagraph (i)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480528/815-20-65-6 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 848 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (a)(3)(iii)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483550/848-10-65-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 105 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479343/105-10-65-6 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 105 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 6 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479343/105-10-65-6 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (f)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480016/944-40-65-2 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (f)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480016/944-40-65-2 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 8 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482615/740-10-65-8 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 8 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482615/740-10-65-8 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 4 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479654/326-10-65-4 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 15 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480336/718-10-65-15 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 15 -Subparagraph (f)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480336/718-10-65-15 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 15 -Subparagraph (f)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480336/718-10-65-15 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-1 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 1 -Subparagraph (e)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480175/815-40-65-1 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-7 Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482765/220-10-50-5 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481674/830-30-50-1 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481694/830-30-45-17 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481694/830-30-45-20 Reference 29: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480167/946-830-55-11 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 205 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480767/946-205-45-3 Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481004/946-505-50-3 Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1 Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.6-05(4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-2 Reference 34: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(4)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-3 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-3 Reference 36: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-3 Reference 37: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 38: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 39: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 Reference 40: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-28 Reference 41: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481231/810-10-45-15 Reference 42: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 16 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481231/810-10-45-16 Reference 43: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4I -Publisher FASB -URI https://asc.fasb.org//1943274/2147481175/810-10-55-4I + Details
Name: | us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph b -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-6 + Details
Name: | us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=aep_GenerationAndMarketingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap_UnregulatedOperationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_ProtectedCellOfEnergyInsuranceServicesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_VariableInterestEntitiesAxis=aep_VariableInterestEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_TransourceEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_SantaRitaEastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_AepCreditIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_DoletHillsLigniteCoLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_OhioValleyElectricCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_DryLakeSolarProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_AppleBlossomAndBlackOakMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=aep_CapitalContributionFromParentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=aep_AEPsRatioofOVECDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=aep_TotalInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_GreatPlainsEnergyInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_ClecoPowerLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_AEPTransmissionCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedAndNonrelatedPartyStatusAxis=us-gaap_RelatedPartyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_BillingsFromAepServiceCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_CarryingAmountInAepServiceCorporationsAccountsPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_AppalachianPowerCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_AppalachianConsumerRateReliefFundingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=aep_CurrentLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=aep_NoncurrentLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_IndianaMichiganPowerCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_DccFuelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_BillingsFromAepGeneratingCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_CarryingAmountInAepGeneratingCompanysAccountsPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_OhioPowerCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_PublicServiceCoOfOklahomaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_SouthwesternElectricPowerCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_SabineMiningCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=aep_SWEPCosShareofObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_AepGeneratingCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_JointlyOwnedUtilityPlantAxis=aep_RockportGeneratingPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_TransourceEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_AEPTexasInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_AEPTexasCentralTransitionFundingCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_RestorationFundingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_EquityMethodOwnershipAxis=aep_JVWindFarmsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_EquityMethodOwnershipAxis=aep_BerkshireHathawayMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_EquityMethodOwnershipAxis=aep_AEPTransmissionHoldcoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_EquityMethodOwnershipAxis=aep_BPWindEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_EquityMethodOwnershipAxis=aep_ETTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |