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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | $ 19,969.7 | $ 19,454.8 | $ 19,391.7
TOTAL REVENUES | 19,721.3 | 18,982.3 | 19,639.5
Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 15,077.6 | 14,947.2 | 14,453.1
Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 7,317.6 | 7,088.4 | 6,995.9
Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 4,298.8 | 4,176.0 | 3,941.7
Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 3,173.3 | 3,389.4 | 3,254.2
Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 287.9 | 293.4 | 261.3
Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 4,466.2 | 4,078.5 | 4,440.8
Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 851.0 | 773.8 | 1,229.5
Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,611.0 | 1,476.2 | 1,380.2
Renewable Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 18.8 | 73.9 | 121.1
Retail, Trading and Marketing Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,985.4 | 1,754.6 | 1,710.0
Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 425.9 | 429.1 | 497.8
TOTAL REVENUES | 483.0 | 458.1 | 408.2
Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (248.4) | (472.5) | 247.8
Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (79.1) | (117.1) | (112.5)
Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (169.3) | (355.4) | 360.3
AEP TEXAS INC. |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,080.8 | 1,906.1 | 1,848.0
TOTAL REVENUES | 2,079.9 | 1,901.9 | 1,846.8
AEP TEXAS INC. | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,371.8 | 1,251.2 | 1,259.6
AEP TEXAS INC. | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 724.8 | 655.5 | 667.2
AEP TEXAS INC. | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 466.6 | 415.2 | 417.5
AEP TEXAS INC. | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 141.5 | 145.0 | 139.6
AEP TEXAS INC. | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 38.9 | 35.5 | 35.3
AEP TEXAS INC. | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 673.2 | 619.0 | 563.8
AEP TEXAS INC. | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEP TEXAS INC. | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 673.2 | 619.0 | 563.8
AEP TEXAS INC. | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 35.8 | 35.9 | 24.6
TOTAL REVENUES | 3.7 | 5.0 | 3.6
AEP TEXAS INC. | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (0.9) | (4.2) | (1.2)
AEP TEXAS INC. | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (0.9) | (4.2) | (1.2)
AEP TEXAS INC. | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 0.0 | 0.0 | 0.0
AEP TRANSMISSION COMPANY, LLC |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,950.5 | 1,720.6 | 1,651.7
TOTAL REVENUES | 1,890.9 | 1,672.0 | 1,624.5
AEP TRANSMISSION COMPANY, LLC | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEP TRANSMISSION COMPANY, LLC | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEP TRANSMISSION COMPANY, LLC | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEP TRANSMISSION COMPANY, LLC | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEP TRANSMISSION COMPANY, LLC | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEP TRANSMISSION COMPANY, LLC | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,924.6 | 1,703.9 | 1,643.5
AEP TRANSMISSION COMPANY, LLC | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEP TRANSMISSION COMPANY, LLC | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,924.6 | 1,703.9 | 1,643.5
AEP TRANSMISSION COMPANY, LLC | Transmission Revenues | Related Party |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,600.0 | 1,400.0 | 1,300.0
AEP TRANSMISSION COMPANY, LLC | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 25.9 | 16.7 | 8.2
AEP TRANSMISSION COMPANY, LLC | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (59.6) | (48.6) | (27.2)
AEP TRANSMISSION COMPANY, LLC | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (59.6) | (48.6) | (27.2)
AEP TRANSMISSION COMPANY, LLC | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 0.0 | 0.0 | 0.0
APPALACHIAN POWER COMPANY |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 4,038.8 | 3,740.6 | 3,520.7
TOTAL REVENUES | 4,032.6 | 3,720.7 | 3,519.9
APPALACHIAN POWER COMPANY | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 3,462.5 | 3,197.2 | 2,953.2
APPALACHIAN POWER COMPANY | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,772.0 | 1,612.9 | 1,558.7
APPALACHIAN POWER COMPANY | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 764.4 | 699.6 | 643.4
APPALACHIAN POWER COMPANY | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 813.1 | 778.4 | 664.0
APPALACHIAN POWER COMPANY | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 113.0 | 106.3 | 87.1
APPALACHIAN POWER COMPANY | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 489.1 | 469.2 | 466.9
APPALACHIAN POWER COMPANY | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 304.5 | 288.2 | 299.9
APPALACHIAN POWER COMPANY | Generation Revenues | Related Party |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 159.0 | 159.0 | 170.0
APPALACHIAN POWER COMPANY | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 184.6 | 181.0 | 167.0
APPALACHIAN POWER COMPANY | Transmission Revenues | Related Party |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 87.0 | 93.0 | 78.0
APPALACHIAN POWER COMPANY | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 87.2 | 74.2 | 100.6
TOTAL REVENUES | 15.9 | 17.3 | 18.3
APPALACHIAN POWER COMPANY | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (6.2) | (19.9) | (0.8)
APPALACHIAN POWER COMPANY | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (6.4) | (20.1) | (1.3)
APPALACHIAN POWER COMPANY | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 0.2 | 0.2 | 0.5
INDIANA MICHIGAN POWER COMPANY |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,603.5 | 2,522.3 | 2,659.7
TOTAL REVENUES | 2,572.0 | 2,535.9 | 2,669.6
INDIANA MICHIGAN POWER COMPANY | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,053.0 | 2,036.3 | 2,010.5
INDIANA MICHIGAN POWER COMPANY | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 847.2 | 841.9 | 852.4
INDIANA MICHIGAN POWER COMPANY | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 605.1 | 575.2 | 550.2
INDIANA MICHIGAN POWER COMPANY | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 595.6 | 614.2 | 602.9
INDIANA MICHIGAN POWER COMPANY | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 5.1 | 5.0 | 5.0
INDIANA MICHIGAN POWER COMPANY | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 434.5 | 365.7 | 526.8
INDIANA MICHIGAN POWER COMPANY | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 393.9 | 327.1 | 490.0
INDIANA MICHIGAN POWER COMPANY | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 40.6 | 38.6 | 36.8
INDIANA MICHIGAN POWER COMPANY | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 116.0 | 120.3 | 122.4
INDIANA MICHIGAN POWER COMPANY | Other Revenues | Related Party |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 75.0 | 68.0 | 62.0
INDIANA MICHIGAN POWER COMPANY | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (31.5) | 13.6 | 9.9
INDIANA MICHIGAN POWER COMPANY | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (7.6) | (10.9) | 10.0
INDIANA MICHIGAN POWER COMPANY | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (23.9) | 24.5 | (0.1)
OHIO POWER COMPANY |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 3,780.9 | 3,802.8 | 3,672.1
TOTAL REVENUES | 3,827.8 | 3,811.4 | 3,665.1
OHIO POWER COMPANY | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 3,522.6 | 3,547.9 | 3,363.5
OHIO POWER COMPANY | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,030.8 | 1,953.7 | 1,830.2
OHIO POWER COMPANY | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,100.7 | 1,082.0 | 947.7
OHIO POWER COMPANY | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 373.7 | 497.1 | 571.7
OHIO POWER COMPANY | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 17.4 | 15.1 | 13.9
OHIO POWER COMPANY | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 96.3 | 82.6 | 86.2
OHIO POWER COMPANY | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
OHIO POWER COMPANY | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 96.3 | 82.6 | 86.2
OHIO POWER COMPANY | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 162.0 | 172.3 | 222.4
TOTAL REVENUES | 12.1 | 12.3 | 11.0
OHIO POWER COMPANY | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 46.9 | 8.6 | (7.0)
OHIO POWER COMPANY | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 26.9 | (15.3) | (25.6)
OHIO POWER COMPANY | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 20.0 | 23.9 | 18.6
PUBLIC SERVICE COMPANY OF OKLAHOMA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,849.5 | 1,976.6 | 1,875.7
TOTAL REVENUES | 1,846.4 | 1,977.0 | 1,874.7
PUBLIC SERVICE COMPANY OF OKLAHOMA | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,758.7 | 1,905.9 | 1,780.9
PUBLIC SERVICE COMPANY OF OKLAHOMA | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 799.6 | 831.2 | 816.3
PUBLIC SERVICE COMPANY OF OKLAHOMA | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 509.5 | 538.8 | 489.2
PUBLIC SERVICE COMPANY OF OKLAHOMA | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 349.1 | 423.1 | 372.5
PUBLIC SERVICE COMPANY OF OKLAHOMA | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 100.5 | 112.8 | 102.9
PUBLIC SERVICE COMPANY OF OKLAHOMA | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 51.5 | 49.2 | 65.7
PUBLIC SERVICE COMPANY OF OKLAHOMA | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 9.4 | 11.7 | 26.5
PUBLIC SERVICE COMPANY OF OKLAHOMA | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 42.1 | 37.5 | 39.2
PUBLIC SERVICE COMPANY OF OKLAHOMA | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 39.3 | 21.5 | 29.1
TOTAL REVENUES | 19.5 | 7.4 | 6.2
PUBLIC SERVICE COMPANY OF OKLAHOMA | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (3.1) | 0.4 | (1.0)
PUBLIC SERVICE COMPANY OF OKLAHOMA | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (3.1) | 0.5 | (1.0)
PUBLIC SERVICE COMPANY OF OKLAHOMA | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 0.0 | (0.1) | 0.0
SOUTHWESTERN ELECTRIC POWER COMPANY |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,043.3 | 2,192.1 | 2,283.2
TOTAL REVENUES | 2,036.3 | 2,182.8 | 2,284.4
SOUTHWESTERN ELECTRIC POWER COMPANY | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,661.6 | 1,834.9 | 1,836.6
SOUTHWESTERN ELECTRIC POWER COMPANY | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 726.4 | 799.5 | 820.7
SOUTHWESTERN ELECTRIC POWER COMPANY | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 558.1 | 609.4 | 612.3
SOUTHWESTERN ELECTRIC POWER COMPANY | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 367.9 | 415.9 | 393.5
SOUTHWESTERN ELECTRIC POWER COMPANY | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 9.2 | 10.1 | 10.1
SOUTHWESTERN ELECTRIC POWER COMPANY | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 349.0 | 327.7 | 421.9
SOUTHWESTERN ELECTRIC POWER COMPANY | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 176.9 | 176.9 | 273.2
SOUTHWESTERN ELECTRIC POWER COMPANY | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 172.1 | 150.8 | 148.7
SOUTHWESTERN ELECTRIC POWER COMPANY | Transmission Revenues | Related Party |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 65.0 | 73.0 | 51.0
SOUTHWESTERN ELECTRIC POWER COMPANY | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 32.7 | 29.5 | 24.7
TOTAL REVENUES | 7.5 | 2.4 | 1.9
SOUTHWESTERN ELECTRIC POWER COMPANY | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (7.0) | (9.3) | 1.2
SOUTHWESTERN ELECTRIC POWER COMPANY | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (7.0) | (9.4) | 1.2
SOUTHWESTERN ELECTRIC POWER COMPANY | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 0.0 | 0.1 | 0.0
Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL REVENUES | 21,500.5 | 20,523.5 | 21,133.4
Operating Segments | AEP TRANSMISSION COMPANY, LLC |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL REVENUES | 1,890.9 | 1,672.0 | 1,624.5
Corporate and Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 186.0 | 152.1 | 100.8
TOTAL REVENUES | 183.1 | 168.0 | 109.9
Corporate and Other | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Corporate and Other | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Corporate and Other | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Corporate and Other | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Corporate and Other | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Corporate and Other | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1.3 | 0.6 | 6.9
Corporate and Other | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Corporate and Other | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Corporate and Other | Renewable Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Corporate and Other | Retail, Trading and Marketing Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1.3 | 0.6 | 6.9
Corporate and Other | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 184.7 | 151.5 | 93.9
Corporate and Other | Other Revenues | Related Party |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 137.0 | 100.0 |
Corporate and Other | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (2.9) | 15.9 | 9.1
Corporate and Other | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 0.0 | 0.0 | 0.0
Corporate and Other | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (2.9) | 15.9 | 9.1
Corporate and Other | AEP TRANSMISSION COMPANY, LLC |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL REVENUES | 0.0 | 0.0 | 0.0
Reconciling Adjustments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | (1,935.3) | (1,668.4) | (1,537.0)
TOTAL REVENUES | (1,962.3) | (1,709.2) | (1,603.8)
Reconciling Adjustments | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | (0.9) | (0.9) | (0.9)
Reconciling Adjustments | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Reconciling Adjustments | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Reconciling Adjustments | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | (0.9) | (0.9) | (0.9)
Reconciling Adjustments | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Reconciling Adjustments | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | (1,720.9) | (1,507.2) | (1,431.3)
Reconciling Adjustments | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
Reconciling Adjustments | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | (1,620.1) | (1,418.3) | (1,413.2)
Reconciling Adjustments | Renewable Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | (4.4) | (6.7) | (8.0)
Reconciling Adjustments | Retail, Trading and Marketing Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | (96.4) | (82.2) | (10.1)
Reconciling Adjustments | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | (213.5) | (160.3) | (104.8)
Reconciling Adjustments | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (27.0) | (40.8) | (66.8)
Reconciling Adjustments | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (29.8) | (25.5) | (57.7)
Reconciling Adjustments | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 2.8 | (15.3) | (9.1)
Reconciling Adjustments | AEP TRANSMISSION COMPANY, LLC |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL REVENUES | 0.0 | 0.0 | 0.0
VIU | Transmission Revenues | Related Party |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 177.0 | 205.0 |
VIU | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 11,642.2 | 11,459.9 | 11,473.3
TOTAL REVENUES | 11,596.6 | 11,449.5 | 11,477.5
VIU | Operating Segments | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 10,183.8 | 10,149.0 | 9,831.1
VIU | Operating Segments | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 4,561.9 | 4,479.3 | 4,498.6
VIU | Operating Segments | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,731.4 | 2,678.8 | 2,576.5
VIU | Operating Segments | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,659.0 | 2,748.2 | 2,543.8
VIU | Operating Segments | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 231.5 | 242.7 | 212.2
VIU | Operating Segments | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,231.1 | 1,106.5 | 1,401.1
VIU | Operating Segments | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 747.8 | 662.5 | 958.3
VIU | Operating Segments | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 483.3 | 444.0 | 442.8
VIU | Operating Segments | Renewable Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
VIU | Operating Segments | Retail, Trading and Marketing Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
VIU | Operating Segments | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 227.3 | 204.4 | 241.1
VIU | Operating Segments | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (45.6) | (10.4) | 4.2
VIU | Operating Segments | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (22.0) | (35.0) | 3.8
VIU | Operating Segments | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (23.6) | 24.6 | 0.4
T&D | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 5,861.7 | 5,708.8 | 5,520.2
TOTAL REVENUES | 5,907.7 | 5,713.3 | 5,512.0
T&D | Operating Segments | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 4,894.7 | 4,799.1 | 4,622.9
T&D | Operating Segments | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,755.7 | 2,609.1 | 2,497.3
T&D | Operating Segments | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,567.4 | 1,497.2 | 1,365.2
T&D | Operating Segments | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 515.2 | 642.1 | 711.3
T&D | Operating Segments | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 56.4 | 50.7 | 49.1
T&D | Operating Segments | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 769.5 | 701.6 | 650.0
T&D | Operating Segments | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
T&D | Operating Segments | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 769.5 | 701.6 | 650.0
T&D | Operating Segments | Renewable Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
T&D | Operating Segments | Retail, Trading and Marketing Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
T&D | Operating Segments | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 197.5 | 208.1 | 247.3
T&D | Operating Segments | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 46.0 | 4.5 | (8.2)
T&D | Operating Segments | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 26.0 | (19.5) | (26.8)
T&D | Operating Segments | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 20.0 | 24.0 | 18.6
AEPTHCo | Transmission Revenues | Related Party |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,600.0 | 1,500.0 | 1,300.0
AEPTHCo | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,004.1 | 1,765.7 | 1,708.8
TOTAL REVENUES | 1,950.8 | 1,728.5 | 1,677.0
AEPTHCo | Operating Segments | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEPTHCo | Operating Segments | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEPTHCo | Operating Segments | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEPTHCo | Operating Segments | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEPTHCo | Operating Segments | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEPTHCo | Operating Segments | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,978.3 | 1,748.9 | 1,700.6
AEPTHCo | Operating Segments | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEPTHCo | Operating Segments | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 1,978.3 | 1,748.9 | 1,700.6
AEPTHCo | Operating Segments | Renewable Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEPTHCo | Operating Segments | Retail, Trading and Marketing Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
AEPTHCo | Operating Segments | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 25.8 | 16.8 | 8.2
AEPTHCo | Operating Segments | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (53.3) | (37.2) | (31.8)
AEPTHCo | Operating Segments | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (53.3) | (37.1) | (31.8)
AEPTHCo | Operating Segments | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 0.0 | (0.1) | 0.0
G&M | Retail, Trading and Marketing Revenues | Related Party |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 96.0 | 82.0 | 59.0
G&M | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,211.0 | 2,036.7 | 2,125.6
TOTAL REVENUES | 2,045.4 | 1,632.2 | 2,466.9
G&M | Operating Segments | Total Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
G&M | Operating Segments | Residential Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
G&M | Operating Segments | Commercial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
G&M | Operating Segments | Industrial Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
G&M | Operating Segments | Other Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
G&M | Operating Segments | Total Wholesale and Competitive Retail Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,206.9 | 2,028.1 | 2,113.5
G&M | Operating Segments | Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 103.2 | 111.3 | 271.2
G&M | Operating Segments | Transmission Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 0.0 | 0.0 | 0.0
G&M | Operating Segments | Renewable Generation Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 23.2 | 80.6 | 129.1
G&M | Operating Segments | Retail, Trading and Marketing Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 2,080.5 | 1,836.2 | 1,713.2
G&M | Operating Segments | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues from Contracts with Customers | 4.1 | 8.6 | 12.1
G&M | Operating Segments | Total Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | (165.6) | (404.5) | 341.3
G&M | Operating Segments | Alternative Revenue Programs |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | 0.0 | 0.0 | 0.0
G&M | Operating Segments | Other Revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Other Revenues | $ (165.6) | $ (404.5) | $ 341.3

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