XML 102 R62.htm IDEA: XBRL DOCUMENT v3.24.2
Revenue from Contracts with Customers (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Disaggregation of Revenue          
Revenue from Contracts with Customers $ 4,579.2 $ 4,372.5 $ 9,604.9 $ 9,063.4  
Revenues 4,579.2 4,372.5 9,604.9 9,063.4  
Revenue, Performance Obligation          
Fixed Performance Obligations 324.0   324.0    
Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 3,485.3 3,459.2 7,295.7 7,247.6  
Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 1,599.2 1,536.1 3,515.3 3,363.3  
Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 1,040.9 1,001.0 2,083.0 2,010.3  
Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 775.7 [1] 850.9 1,558.7 [2] 1,733.9 [3]  
Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 69.5 71.2 138.7 140.1  
Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 1,072.4 940.5 2,235.2 1,917.6  
Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 172.6 161.1 436.0 376.3 [3]  
Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 430.9 [4] 350.6 [5] 799.7 [6] 677.8 [7]  
Renewable Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 6.8 [1] 30.0 [8] 11.7 [2] 51.2 [3]  
Retail, Trading and Marketing Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 462.1 [9] 398.8 [8] 987.8 [10] 812.3 [11]  
Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 99.9 [12] 117.2 [13] 211.7 [14] 182.5 [15]  
Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 4,657.6 4,516.9 9,742.6 9,347.7  
Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues (78.4) (144.4) (137.7) (284.3)  
Alternative [Member]          
Disaggregation of Revenue          
Revenues (35.6) [1],[16] (15.6) [8],[17] (34.1) [2],[18] (25.6) [3],[19]  
Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 135.9 94.5 261.3 186.9  
Revenues (42.8) [1],[20] (128.8) [8],[21] (103.6) [2],[22] (258.7) [3],[23]  
2024 [Member]          
Revenue, Performance Obligation          
Fixed Performance Obligations 46.2   46.2    
2025-2026[Member]          
Revenue, Performance Obligation          
Fixed Performance Obligations 168.3   168.3    
2027-2028 [Member]          
Revenue, Performance Obligation          
Fixed Performance Obligations 84.8   84.8    
After 2028          
Revenue, Performance Obligation          
Fixed Performance Obligations 24.7   24.7    
AEP Texas Inc. [Member]          
Disaggregation of Revenue          
Revenues 539.6 461.2 1,006.0 890.7  
AEP Texas Inc. [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 1.4 1.3 2.7 2.5  
Revenue Textuals          
Affiliated Companies - Contracts with Customers 18.1   18.1   $ 23.8
AEP Texas Inc. [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 343.2 289.4 646.7 565.0  
AEP Texas Inc. [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 184.9 144.9 332.2 275.6  
AEP Texas Inc. [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 115.0 100.6 225.9 197.9  
AEP Texas Inc. [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 34.0 [24] 35.2 69.6 [25] 74.5 [26]  
AEP Texas Inc. [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 9.3 8.7 19.0 17.0  
AEP Texas Inc. [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 184.8 163.1 340.7 309.4  
AEP Texas Inc. [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [27] 0.0 [28] 0.0 [29] 0.0 [30]  
AEP Texas Inc. [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 184.8 [31] 163.1 [32] 340.7 [33] 309.4 [34]  
AEP Texas Inc. [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 10.4 [35] 10.7 [36] 19.2 [37] 20.4 [38]  
AEP Texas Inc. [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 538.4 463.2 1,006.6 894.8  
AEP Texas Inc. [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues 1.2 (2.0) (0.6) (4.1)  
AEP Texas Inc. [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues 1.2 [24],[39] (2.0) [40],[41] (0.6) [25],[42] (4.1) [26],[43]  
AEP Texas Inc. [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.5 0.5 2.6 1.1  
Revenues 0.0 [24] 0.0 [41] 0.0 [25] 0.0 [26]  
AEP Texas Inc. [Member] | Short-term Contract with Customer [Member] | Related Party          
Revenue Textuals          
Affiliated Companies - Contracts with Customers 0.2   0.2   0.0
AEP Transmission Co [Member]          
Disaggregation of Revenue          
Revenues 475.2 444.9 958.0 886.5  
AEP Transmission Co [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 394.4 365.8 783.8 723.2  
Revenue Textuals          
Affiliated Companies - Contracts with Customers 143.0   143.0   125.5
AEP Transmission Co [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
AEP Transmission Co [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
AEP Transmission Co [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
AEP Transmission Co [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [24] 0.0 0.0 [25] 0.0 [26]  
AEP Transmission Co [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
AEP Transmission Co [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 483.2 444.7 958.6 883.4  
AEP Transmission Co [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [27] 0.0 [28] 0.0 [29] 0.0 [30]  
AEP Transmission Co [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 483.2 [31] 444.7 [32] 958.6 [33] 883.4 [34]  
AEP Transmission Co [Member] | Wholesale Transmission [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 389.0 357.0 773.0 706.0  
AEP Transmission Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 6.2 [35] 4.1 [36] 14.3 [37] 7.8 [38]  
AEP Transmission Co [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 489.4 448.8 972.9 891.2  
AEP Transmission Co [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues (14.2) (3.9) (14.9) (4.7)  
AEP Transmission Co [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues (14.2) [24],[39] (3.9) [40],[41] (14.9) [25],[42] (4.7) [26],[43]  
AEP Transmission Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.4 0.0 2.8 0.0  
Revenues 0.0 [24] 0.0 [41] 0.0 [25] 0.0 [26]  
AEP Transmission Co [Member] | Short-term Contract with Customer [Member] | Related Party          
Revenue Textuals          
Affiliated Companies - Contracts with Customers 131.9   131.9   123.2
Appalachian Power Co [Member]          
Disaggregation of Revenue          
Revenues 910.2 826.5 2,003.2 1,814.2  
Revenue, Performance Obligation          
Fixed Performance Obligations 77.1   77.1    
Appalachian Power Co [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 54.8 61.1 117.9 130.7  
Revenue Textuals          
Affiliated Companies - Contracts with Customers 113.6   113.6   98.8
Appalachian Power Co [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 785.9 706.1 1,725.0 1,559.9  
Appalachian Power Co [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 364.8 324.8 891.1 795.3  
Appalachian Power Co [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 187.1 163.6 375.4 334.9  
Appalachian Power Co [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 205.9 [24] 192.5 402.3 [25] 378.3 [26]  
Appalachian Power Co [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 28.1 25.2 56.2 51.4  
Appalachian Power Co [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 117.7 108.1 249.9 229.7  
Appalachian Power Co [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 72.1 [27] 64.2 [28] 157.2 [29] 144.4 [30]  
Appalachian Power Co [Member] | Wholesale Generation [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 36.0 38.0 77.0 85.0  
Appalachian Power Co [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 45.6 [31] 43.9 [32] 92.7 [33] 85.3 [34]  
Appalachian Power Co [Member] | Wholesale Transmission [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 22.0   43.0    
Appalachian Power Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 13.1 [35] 11.8 [36] 34.8 [37] 24.8 [38]  
Appalachian Power Co [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 916.7 826.0 2,009.7 1,814.4  
Appalachian Power Co [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues (6.5) 0.5 (6.5) (0.2)  
Appalachian Power Co [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues (6.5) [24],[39] 0.5 [40],[41] (6.6) [25],[42] (0.2) [26],[43]  
Appalachian Power Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 3.7 2.9 9.3 6.5  
Revenues 0.0 [24] 0.0 [41] 0.1 [25] 0.0 [26]  
Appalachian Power Co [Member] | Short-term Contract with Customer [Member] | Related Party          
Revenue Textuals          
Affiliated Companies - Contracts with Customers 74.2   74.2   71.7
Appalachian Power Co [Member] | 2024 [Member]          
Revenue, Performance Obligation          
Fixed Performance Obligations 8.0   8.0    
Appalachian Power Co [Member] | 2025-2026[Member]          
Revenue, Performance Obligation          
Fixed Performance Obligations 32.1   32.1    
Appalachian Power Co [Member] | 2027-2028 [Member]          
Revenue, Performance Obligation          
Fixed Performance Obligations 25.4   25.4    
Appalachian Power Co [Member] | After 2028          
Revenue, Performance Obligation          
Fixed Performance Obligations 11.6   11.6    
Indiana Michigan Power Co [Member]          
Disaggregation of Revenue          
Revenues 594.3 599.2 1,261.7 1,262.2  
Revenue, Performance Obligation          
Fixed Performance Obligations 24.3   24.3    
Indiana Michigan Power Co [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 2.1 1.9 3.9 3.1  
Revenue Textuals          
Affiliated Companies - Contracts with Customers 78.8   78.8   65.0
Indiana Michigan Power Co [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 495.7 483.7 1,014.5 1,016.1  
Indiana Michigan Power Co [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 190.5 185.2 415.3 424.8  
Indiana Michigan Power Co [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 150.8 141.4 295.6 280.3  
Indiana Michigan Power Co [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 153.1 [24] 155.9 301.0 [25] 308.5 [26]  
Indiana Michigan Power Co [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 1.3 1.2 2.6 2.5  
Indiana Michigan Power Co [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 64.8 73.1 212.2 185.2  
Indiana Michigan Power Co [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 54.8 [27] 63.5 [28] 192.1 [29] 167.5 [30]  
Indiana Michigan Power Co [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 10.0 [31] 9.6 [32] 20.1 [33] 17.7 [34]  
Indiana Michigan Power Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 29.4 [35] 45.0 [36] 57.0 [37] 66.4 [38]  
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 23.0 17.0 41.0 35.0  
Indiana Michigan Power Co [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 589.9 601.8 1,283.7 1,267.7  
Indiana Michigan Power Co [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues 4.4 (2.6) (22.0) (5.5)  
Indiana Michigan Power Co [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues 0.0 [24],[39] (2.6) [40],[41] (0.5) [25],[42] (5.5) [26],[43]  
Indiana Michigan Power Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 2.1 2.4 4.9 5.5  
Revenues 4.4 [24] 0.0 [41] (21.5) [25] 0.0 [26]  
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 20.5 14.5 35.5 30.4  
Indiana Michigan Power Co [Member] | Short-term Contract with Customer [Member] | Related Party          
Revenue Textuals          
Affiliated Companies - Contracts with Customers 46.3   46.3   44.0
Indiana Michigan Power Co [Member] | 2024 [Member]          
Revenue, Performance Obligation          
Fixed Performance Obligations 2.2   2.2    
Indiana Michigan Power Co [Member] | 2025-2026[Member]          
Revenue, Performance Obligation          
Fixed Performance Obligations 8.8   8.8    
Indiana Michigan Power Co [Member] | 2027-2028 [Member]          
Revenue, Performance Obligation          
Fixed Performance Obligations 8.8   8.8    
Indiana Michigan Power Co [Member] | After 2028          
Revenue, Performance Obligation          
Fixed Performance Obligations 4.5   4.5    
Ohio Power Co [Member]          
Disaggregation of Revenue          
Revenues 896.3 879.1 1,920.1 1,913.7  
Ohio Power Co [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 5.7 8.2 11.4 15.8  
Revenue Textuals          
Affiliated Companies - Contracts with Customers 141.4   141.4   129.2
Ohio Power Co [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 834.9 807.5 1,782.2 1,789.4  
Ohio Power Co [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 465.3 429.3 1,021.8 955.3  
Ohio Power Co [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 276.1 257.8 562.2 536.3  
Ohio Power Co [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 89.0 [24] 116.8 189.5 [25] 290.4 [26]  
Ohio Power Co [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 4.5 3.6 8.7 7.4  
Ohio Power Co [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 23.6 21.0 47.4 38.9  
Ohio Power Co [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [27] 0.0 [28] 0.0 [29] 0.0 [30]  
Ohio Power Co [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 23.6 [31] 21.0 [32] 47.4 [33] 38.9 [34]  
Ohio Power Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 28.5 [35] 45.5 [36] 70.7 [37] 78.7 [38]  
Ohio Power Co [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 887.0 874.0 1,900.3 1,907.0  
Ohio Power Co [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues 9.3 5.1 19.8 6.7  
Ohio Power Co [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues 5.3 [24],[39] (0.9) [40],[41] 7.9 [25],[42] (10.4) [26],[43]  
Ohio Power Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 2.8 2.1 5.5 7.3  
Revenues 4.0 [24] 6.0 [41] 11.9 [25] 17.1 [26]  
Ohio Power Co [Member] | Short-term Contract with Customer [Member] | Related Party          
Revenue Textuals          
Affiliated Companies - Contracts with Customers 65.2   65.2   70.1
Public Service Co Of Oklahoma [Member]          
Disaggregation of Revenue          
Revenues 458.8 474.7 846.6 891.7  
Public Service Co Of Oklahoma [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 1.1 0.1 4.6 0.8  
Revenue Textuals          
Affiliated Companies - Contracts with Customers 80.9   80.9   31.0
Public Service Co Of Oklahoma [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 434.9 454.3 797.9 856.8  
Public Service Co Of Oklahoma [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 187.8 186.5 346.0 357.4  
Public Service Co Of Oklahoma [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 130.1 131.7 233.1 240.8  
Public Service Co Of Oklahoma [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 91.1 [24] 107.8 171.4 [25] 206.1 [26]  
Public Service Co Of Oklahoma [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 25.9 28.3 47.4 52.5  
Public Service Co Of Oklahoma [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 12.9 14.2 25.9 26.4  
Public Service Co Of Oklahoma [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 2.7 [27] 4.3 [28] 4.9 [29] 5.2 [30]  
Public Service Co Of Oklahoma [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 10.2 [31] 9.9 [32] 21.0 [33] 21.2 [34]  
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 12.4 [35] 7.2 [36] 24.4 [37] 9.5 [38]  
Public Service Co Of Oklahoma [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 460.2 475.7 848.2 892.7  
Public Service Co Of Oklahoma [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues (1.4) (1.0) (1.6) (1.0)  
Public Service Co Of Oklahoma [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues (1.4) [24],[39] (1.0) [40],[41] (1.6) [25],[42] (1.0) [26],[43]  
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 9.6 2.2 15.8 3.7  
Revenues 0.0 [24] 0.0 [41] 0.0 [25] 0.0 [26]  
Public Service Co Of Oklahoma [Member] | Short-term Contract with Customer [Member] | Related Party          
Revenue Textuals          
Affiliated Companies - Contracts with Customers 29.0   29.0   12.4
Southwestern Electric Power Co [Member]          
Disaggregation of Revenue          
Revenues 395.8 537.8 912.0 1,053.7  
Southwestern Electric Power Co [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 16.5 19.7 30.4 31.3  
Revenue Textuals          
Affiliated Companies - Contracts with Customers 85.4   85.4   47.2
Southwestern Electric Power Co [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 295.4 452.1 715.4 878.3  
Southwestern Electric Power Co [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 120.7 185.1 303.1 361.0  
Southwestern Electric Power Co [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 100.7 153.8 240.7 297.3  
Southwestern Electric Power Co [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 72.3 [24] 110.6 167.3 [25] 214.8 [26]  
Southwestern Electric Power Co [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 1.7 2.6 4.3 5.2  
Southwestern Electric Power Co [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 96.8 82.2 183.5 164.7  
Southwestern Electric Power Co [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 50.1 [27] 43.9 [28] 97.2 [29] 83.5 [30]  
Southwestern Electric Power Co [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 46.7 [31] 38.3 [32] 86.3 [33] 81.2 [34]  
Southwestern Electric Power Co [Member] | Wholesale Transmission [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 15.0   28.0    
Southwestern Electric Power Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 7.6 [35] 7.0 [36] 17.2 [37] 14.9 [38]  
Southwestern Electric Power Co [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 399.8 541.3 916.1 1,057.9  
Southwestern Electric Power Co [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues (4.0) (3.5) (4.1) (4.2)  
Southwestern Electric Power Co [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues (4.0) [24],[39] (3.5) [40],[41] (4.1) [25],[42] (4.2) [26],[43]  
Southwestern Electric Power Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 2.4 0.8 6.3 1.3  
Revenues 0.0 [24] 0.0 [41] 0.0 [25] 0.0 [26]  
Southwestern Electric Power Co [Member] | Short-term Contract with Customer [Member] | Related Party          
Revenue Textuals          
Affiliated Companies - Contracts with Customers 44.0   44.0   $ 27.4
Consolidation Eliminations [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Revenues (490.8) (464.2) (1,016.8) (907.9)  
Consolidation Eliminations [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers [44] (490.8) (464.2) (1,016.8) (907.9)  
Consolidation Eliminations [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers (0.1) (0.1) (0.3) (0.3)  
Consolidation Eliminations [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Consolidation Eliminations [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Consolidation Eliminations [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers (0.1) [1] (0.1) (0.3) [2] (0.3) [3]  
Consolidation Eliminations [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Consolidation Eliminations [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers (422.2) (415.9) (888.3) (817.7)  
Consolidation Eliminations [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers (0.1) 0.1 0.0 0.1 [3]  
Consolidation Eliminations [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers (397.0) [4] (402.8) [5] (815.6) [6] (804.6) [7]  
Consolidation Eliminations [Member] | Renewable Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers (1.4) [1] (3.1) [8] (2.8) [2] (3.2) [3]  
Consolidation Eliminations [Member] | Retail, Trading and Marketing Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers (23.7) [9] (10.1) [8] (69.9) [10] (10.0) [11]  
Consolidation Eliminations [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers (48.8) [12] (39.9) [13] (117.5) [14] (83.6) [15]  
Consolidation Eliminations [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers (471.1) (455.9) (1,006.1) (901.6)  
Consolidation Eliminations [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues (19.7) (8.3) (10.7) (6.3)  
Consolidation Eliminations [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues (17.3) [1],[16] (6.3) [8],[17] (16.3) [2],[18] (3.4) [3],[19]  
Consolidation Eliminations [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenues (2.4) [1],[20] (2.0) [8],[21] 5.6 [2],[22] (2.9) [3],[23]  
Consolidation Eliminations [Member] | AEP Transmission Co [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Revenues 0.0 0.0 0.0 0.0  
Consolidation Eliminations [Member] | AEP Transmission Co [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Consolidation Eliminations [Member] | AEP Transmission Co [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0   0.0    
Vertically Integrated Utilities [Member]          
Disaggregation of Revenue          
Revenues 2,619.0 2,674.5 5,566.9 5,532.3  
Vertically Integrated Utilities [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 47.0 45.5 93.7 87.0  
Vertically Integrated Utilities [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 2,307.4 2,362.5 4,867.2 4,893.4  
Vertically Integrated Utilities [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 949.0 962.0 2,161.3 2,132.4  
Vertically Integrated Utilities [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 649.8 642.7 1,294.9 1,276.1  
Vertically Integrated Utilities [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 652.8 [1] 698.9 1,299.9 [2] 1,369.2 [3]  
Vertically Integrated Utilities [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 55.8 58.9 111.1 115.7  
Vertically Integrated Utilities [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 272.0 254.9 626.8 552.4  
Vertically Integrated Utilities [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 149.0 141.4 384.9 324.2 [3]  
Vertically Integrated Utilities [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 123.0 [4] 113.5 [5] 241.9 [6] 228.2 [7]  
Vertically Integrated Utilities [Member] | Wholesale Transmission [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 41.0   83.0 80.0  
Vertically Integrated Utilities [Member] | Renewable Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [1] 0.0 [8] 0.0 [2] 0.0 [3]  
Vertically Integrated Utilities [Member] | Retail, Trading and Marketing Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [9] 0.0 [8] 0.0 [10] 0.0 [11]  
Vertically Integrated Utilities [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 47.4 [12] 61.9 [13] 107.1 [14] 94.5 [15]  
Vertically Integrated Utilities [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 2,626.8 2,679.3 5,601.1 5,540.3  
Vertically Integrated Utilities [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues (7.8) (4.8) (34.2) (8.0)  
Vertically Integrated Utilities [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues (12.1) [1],[16] (4.9) [8],[17] (12.8) [2],[18] (8.0) [3],[19]  
Vertically Integrated Utilities [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenues 4.3 [1],[20] 0.1 [8],[21] (21.4) [2],[22] 0.0 [3],[23]  
Transmission And Distribution Utilities [Member]          
Disaggregation of Revenue          
Revenues 1,435.9 1,340.2 2,926.1 2,804.4  
Transmission And Distribution Utilities [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 7.1 9.4 14.1 18.3  
Transmission And Distribution Utilities [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 1,178.0 1,096.8 2,428.8 2,354.5  
Transmission And Distribution Utilities [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 650.2 574.1 1,354.0 1,230.9  
Transmission And Distribution Utilities [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 391.1 358.3 788.1 734.2  
Transmission And Distribution Utilities [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 123.0 [1] 152.1 259.1 [2] 365.0 [3]  
Transmission And Distribution Utilities [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 13.7 12.3 27.6 24.4  
Transmission And Distribution Utilities [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 208.3 184.1 388.1 348.3  
Transmission And Distribution Utilities [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0 [3]  
Transmission And Distribution Utilities [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 208.3 [4] 184.1 [5] 388.1 [6] 348.3 [7]  
Transmission And Distribution Utilities [Member] | Renewable Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [1] 0.0 [8] 0.0 [2] 0.0 [3]  
Transmission And Distribution Utilities [Member] | Retail, Trading and Marketing Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [9] 0.0 [8] 0.0 [10] 0.0 [11]  
Transmission And Distribution Utilities [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 38.9 [12] 56.1 [13] 89.9 [14] 98.9 [15]  
Transmission And Distribution Utilities [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 1,425.2 1,337.0 2,906.8 2,801.7  
Transmission And Distribution Utilities [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues 10.7 3.2 19.3 2.7  
Transmission And Distribution Utilities [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues 6.7 [1],[16] (2.9) [8],[17] 7.4 [2],[18] (14.5) [3],[19]  
Transmission And Distribution Utilities [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenues 4.0 [1],[20] 6.1 [8],[21] 11.9 [2],[22] 17.2 [3],[23]  
AEP Transmission Holdco [Member]          
Disaggregation of Revenue          
Revenues 489.9 458.6 987.2 914.1  
AEP Transmission Holdco [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
AEP Transmission Holdco [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
AEP Transmission Holdco [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
AEP Transmission Holdco [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [1] 0.0 0.0 [2] 0.0 [3]  
AEP Transmission Holdco [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
AEP Transmission Holdco [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 496.6 455.8 985.3 905.9  
AEP Transmission Holdco [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0 [3]  
AEP Transmission Holdco [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 496.6 [4] 455.8 [5] 985.3 [6] 905.9 [7]  
AEP Transmission Holdco [Member] | Wholesale Transmission [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 393.0 360.0 780.0 712.0  
AEP Transmission Holdco [Member] | Renewable Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [1] 0.0 [8] 0.0 [2] 0.0 [3]  
AEP Transmission Holdco [Member] | Retail, Trading and Marketing Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [9] 0.0 [8] 0.0 [10] 0.0 [11]  
AEP Transmission Holdco [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 6.2 [12] 4.3 [13] 14.3 [14] 7.9 [15]  
AEP Transmission Holdco [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 502.8 460.1 999.6 913.8  
AEP Transmission Holdco [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues (12.9) (1.5) (12.4) 0.3  
AEP Transmission Holdco [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues (12.9) [1],[16] (1.5) [8],[17] (12.4) [2],[18] 0.3 [3],[19]  
AEP Transmission Holdco [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenues 0.0 [1],[20] 0.0 [8],[21] 0.0 [2],[22] 0.0 [3],[23]  
Generation And Marketing [Member]          
Disaggregation of Revenue          
Revenues 467.5 331.4 1,031.0 658.4  
Generation And Marketing [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 25.0 13.2 72.6 13.3  
Generation And Marketing [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Generation And Marketing [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Generation And Marketing [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Generation And Marketing [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [1] 0.0 0.0 [2] 0.0 [3]  
Generation And Marketing [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Generation And Marketing [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 517.4 460.4 1,122.5 927.8  
Generation And Marketing [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 23.7 19.6 51.1 52.0 [3]  
Generation And Marketing [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [4] 0.0 [5] 0.0 [6] 0.0 [7]  
Generation And Marketing [Member] | Renewable Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 8.2 [1] 33.1 [8] 14.5 [2] 54.4 [3]  
Generation And Marketing [Member] | Retail, Trading and Marketing Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 485.5 [9] 407.7 [8] 1,056.9 [10] 821.4 [11]  
Generation And Marketing [Member] | Retail, Trading and Marketing Revenues [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers 24.0   70.0 10.0  
Generation And Marketing [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 1.0 [12] 6.2 [13] 2.3 [14] 6.8 [15]  
Generation And Marketing [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 518.4 466.6 1,124.8 934.6  
Generation And Marketing [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues (50.9) (135.2) (93.8) (276.2)  
Generation And Marketing [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues 0.0 [1],[16] 0.0 [8],[17] 0.0 [2],[18] 0.0 [3],[19]  
Generation And Marketing [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenues (50.9) [1],[20] (135.2) [8],[21] (93.8) [2],[22] (276.2) [3],[23]  
Other Segments [Member]          
Disaggregation of Revenue          
Revenues [45] 57.7 32.0 110.5 62.1  
Other Segments [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers [45] 30.5 25.8 68.4 53.6  
Other Segments [Member] | Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Other Segments [Member] | Residential [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Other Segments [Member] | Commercial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Other Segments [Member] | Industrial [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [1] 0.0 0.0 [2] 0.0 [3]  
Other Segments [Member] | Other Retail [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0  
Other Segments [Member] | Wholesale and Competitive [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.3 1.2 0.8 0.9  
Other Segments [Member] | Wholesale Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 0.0 0.0 0.0 [3]  
Other Segments [Member] | Wholesale Transmission [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [4] 0.0 [5] 0.0 [6] 0.0 [7]  
Other Segments [Member] | Renewable Generation [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.0 [1] 0.0 [8] 0.0 [2] 0.0 [3]  
Other Segments [Member] | Retail, Trading and Marketing Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 0.3 [9] 1.2 [8] 0.8 [10] 0.9 [11]  
Other Segments [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 55.2 [12] 28.6 [13] 115.6 [14] 58.0 [15]  
Other Segments [Member] | Affiliated and Nonaffiliated [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers 55.5 29.8 116.4 58.9  
Other Segments [Member] | Alternative and Other [Member]          
Disaggregation of Revenue          
Revenues 2.2 2.2 (5.9) 3.2  
Other Segments [Member] | Alternative [Member]          
Disaggregation of Revenue          
Revenues 0.0 [1],[16] 0.0 [8],[17] 0.0 [2],[18] 0.0 [3],[19]  
Other Segments [Member] | Other Revenues [Member]          
Disaggregation of Revenue          
Revenue from Contracts with Customers [45] 27.2 6.2 42.1 8.5  
Revenues 2.2 [1],[20] 2.2 [8],[21] (5.9) [2],[22] 3.2 [3],[23]  
Corporate and Other | Other Revenues [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers $ 30.0 $ 26.0      
Corporate and Other | Other Revenues [Member] | Related Party          
Disaggregation of Revenue          
Revenue from Contracts with Customers     $ 79.0 $ 55.0  
[1] Amounts include affiliated and nonaffiliated revenues.
[2] Amounts include affiliated and nonaffiliated revenues.
[3] Amounts include affiliated and nonaffiliated revenues
[4] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $393 million. The affiliated revenue for Vertically Integrated Utilities was $41 million. The remaining affiliated amounts were immaterial.
[5] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $360 million. The remaining affiliated amounts were immaterial.
[6] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $780 million. The affiliated revenue for Vertically Integrated Utilities was $83 million. The remaining affiliated amounts were immaterial.
[7] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $712 million. The affiliated revenue for Vertically Integrated Utilities was $80 million. The remaining affiliated amounts were immaterial.
[8] Amounts include affiliated and nonaffiliated revenues
[9] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $24 million. The remaining affiliated amounts were immaterial.
[10] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $70 million. The remaining affiliated amounts were immaterial.
[11] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $10 million. The remaining affiliated amounts were immaterial.
[12] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $30 million. The remaining affiliated amounts were immaterial.
[13] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $26 million. The remaining affiliated amounts were immaterial.
[14] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $79 million. The remaining affiliated amounts were immaterial.
[15] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $55 million. The remaining affiliated amounts were immaterial.
[16] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.
[17] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.
[18] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.
[19] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.
[20] Generation & Marketing includes economic hedge activity.
[21] Generation & Marketing includes economic hedge activity.
[22] Generation & Marketing includes economic hedge activity.
[23] Generation & Marketing includes economic hedge activity.
[24] Amounts include affiliated and nonaffiliated revenues.
[25] Amounts include affiliated and nonaffiliated revenues.
[26] Amounts include affiliated and nonaffiliated revenues.
[27] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $36 million primarily related to the PPA with KGPCo.
[28] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $38 million primarily related to the PPA with KGPCo.
[29] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $77 million primarily related to the PPA with KGPCo. The remaining affiliated amounts were immaterial.
[30] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $85 million primarily related to the PPA with KGPCo. The remaining affiliated amounts were immaterial.
[31] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $389 million, APCo was $22 million and SWEPCo was $15 million. The remaining affiliated amounts were immaterial.
[32] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $357 million. The remaining affiliated amounts were immaterial.
[33] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $773 million, APCo was $43 million and SWEPCo was $28 million. The remaining affiliated amounts were immaterial.
[34] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $706 million. The remaining affiliated amounts were immaterial.
[35] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $23 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.
[36] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $17 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.
[37] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $41 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.
[38] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $35 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.
[39] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.
[40] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.
[41] Amounts include affiliated and nonaffiliated revenues.
[42] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.
[43] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.
[44] Represents inter-segment revenues.
[45] Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income, interest expense and other nonallocated costs.