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Revenue from Contracts with Customers | 12 Months Ended
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Dec. 31, 2023
Revenue from Contracts with Customers | REVENUE FROM CONTRACTS WITH CUSTOMERS The disclosures in this note apply to all Registrants, unless indicated otherwise. Disaggregated Revenues from Contracts with Customers The table below represents AEP’s reportable segment revenues from contracts with customers, net of respective provisions for refund, by type of revenue:
|  | Year Ended December 31, 2023
|  | Vertically Integrated Utilities |  | Transmission and Distribution Utilities |  | AEP Transmission Holdco |  | Generation & Marketing |  | Corporate and Other |  | Reconciling Adjustments |  | AEP Consolidated
|  | (in millions)
Retail Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Revenues |  | $ | 4,479.3 |  |  | $ | 2,609.1 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 7,088.4 |
Commercial Revenues |  | 2,678.8 |  |  | 1,497.2 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 4,176.0 |
Industrial Revenues (a) |  | 2,748.2 |  |  | 642.1 |  |  | — |  |  | — |  |  | — |  |  | (0.9) |  |  | 3,389.4 |
Other Retail Revenues |  | 242.7 |  |  | 50.7 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 293.4 |
Total Retail Revenues |  | 10,149.0 |  |  | 4,799.1 |  |  | — |  |  | — |  |  | — |  |  | (0.9) |  |  | 14,947.2 |
Wholesale and Competitive Retail Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Generation Revenues |  | 662.5 |  |  | — |  |  | — |  |  | 111.3 |  |  | — |  |  | — |  |  | 773.8 |
Transmission Revenues (b) |  | 444.0 |  |  | 701.6 |  |  | 1,748.9 |  |  | — |  |  | — |  |  | (1,418.3) |  |  | 1,476.2 |
Renewable Generation Revenues (a) |  | — |  |  | — |  |  | — |  |  | 80.6 |  |  | — |  |  | (6.7) |  |  | 73.9 |
Retail, Trading and Marketing Revenues (c) |  | — |  |  | — |  |  | — |  |  | 1,836.2 |  |  | 0.6 |  |  | (82.2) |  |  | 1,754.6 |
Total Wholesale and Competitive Retail Revenues |  | 1,106.5 |  |  | 701.6 |  |  | 1,748.9 |  |  | 2,028.1 |  |  | 0.6 |  |  | (1,507.2) |  |  | 4,078.5 |
Other Revenues from Contracts with Customers (d) |  | 204.4 |  |  | 208.1 |  |  | 16.8 |  |  | 8.6 |  |  | 151.5 |  |  | (160.3) |  |  | 429.1 |
Total Revenues from Contracts with Customers |  | 11,459.9 |  |  | 5,708.8 |  |  | 1,765.7 |  |  | 2,036.7 |  |  | 152.1 |  |  | (1,668.4) |  |  | 19,454.8 |
Other Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Alternative Revenue Programs (e) |  | (35.0) |  |  | (19.5) |  |  | (37.1) |  |  | — |  |  | — |  |  | (25.5) |  |  | (117.1) |
Other Revenues (a) (f) |  | 24.6 |  |  | 24.0 |  |  | (0.1) |  |  | (404.5) |  |  | 15.9 |  |  | (15.3) |  |  | (355.4) |
Total Other Revenues |  | (10.4) |  |  | 4.5 |  |  | (37.2) |  |  | (404.5) |  |  | 15.9 |  |  | (40.8) |  |  | (472.5) |
Total Revenues |  | $ | 11,449.5 |  |  | $ | 5,713.3 |  |  | $ | 1,728.5 |  |  | $ | 1,632.2 |  |  | $ | 168.0 |  |  | $ | (1,709.2) |  |  | $ | 18,982.3 |
(a)Amounts include affiliated and nonaffiliated revenues. (b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1.5 billion and Vertically Integrated Utilities was $205 million. The remaining affiliated amounts were immaterial. (c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $82 million. The remaining affiliated amounts were immaterial. (d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $100 million. The remaining affiliated amounts were immaterial. (e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues. (f)Generation & Marketing includes economic hedge activity.
|  | Year Ended December 31, 2022
|  | Vertically Integrated Utilities |  | Transmission and Distribution Utilities |  | AEP Transmission Holdco |  | Generation & Marketing |  | Corporate and Other |  | Reconciling Adjustments |  | AEP Consolidated
|  | (in millions)
Retail Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Revenues |  | $ | 4,498.6 |  |  | $ | 2,497.3 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 6,995.9 |
Commercial Revenues |  | 2,576.5 |  |  | 1,365.2 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3,941.7 |
Industrial Revenues (a) |  | 2,543.8 |  |  | 711.3 |  |  | — |  |  | — |  |  | — |  |  | (0.9) |  |  | 3,254.2 |
Other Retail Revenues |  | 212.2 |  |  | 49.1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 261.3 |
Total Retail Revenues |  | 9,831.1 |  |  | 4,622.9 |  |  | — |  |  | — |  |  | — |  |  | (0.9) |  |  | 14,453.1 |
Wholesale and Competitive Retail Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Generation Revenues |  | 958.3 |  |  | — |  |  | — |  |  | 271.2 |  |  | — |  |  | — |  |  | 1,229.5 |
Transmission Revenues (b) |  | 442.8 |  |  | 650.0 |  |  | 1,700.6 |  |  | — |  |  | — |  |  | (1,413.2) |  |  | 1,380.2 |
Renewable Generation Revenues (a) |  | — |  |  | — |  |  | — |  |  | 129.1 |  |  | — |  |  | (8.0) |  |  | 121.1 |
Retail, Trading and Marketing Revenues (a) |  | — |  |  | — |  |  | — |  |  | 1,713.2 |  |  | 6.9 |  |  | (10.1) |  |  | 1,710.0 |
Total Wholesale and Competitive Retail Revenues |  | 1,401.1 |  |  | 650.0 |  |  | 1,700.6 |  |  | 2,113.5 |  |  | 6.9 |  |  | (1,431.3) |  |  | 4,440.8 |
Other Revenues from Contracts with Customers (c) |  | 241.1 |  |  | 247.3 |  |  | 8.2 |  |  | 12.1 |  |  | 93.9 |  |  | (104.8) |  |  | 497.8 |
Total Revenues from Contracts with Customers |  | 11,473.3 |  |  | 5,520.2 |  |  | 1,708.8 |  |  | 2,125.6 |  |  | 100.8 |  |  | (1,537.0) |  |  | 19,391.7 |
Other Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Alternative Revenue Programs (d) |  | 3.8 |  |  | (26.8) |  |  | (31.8) |  |  | — |  |  | — |  |  | (57.7) |  |  | (112.5) |
Other Revenues (a) (e) |  | 0.4 |  |  | 18.6 |  |  | — |  |  | 341.3 |  |  | 9.1 |  |  | (9.1) |  |  | 360.3 |
Total Other Revenues |  | 4.2 |  |  | (8.2) |  |  | (31.8) |  |  | 341.3 |  |  | 9.1 |  |  | (66.8) |  |  | 247.8 |
Total Revenues |  | $ | 11,477.5 |  |  | $ | 5,512.0 |  |  | $ | 1,677.0 |  |  | $ | 2,466.9 |  |  | $ | 109.9 |  |  | $ | (1,603.8) |  |  | $ | 19,639.5 |
(a)Amounts include affiliated and nonaffiliated revenues. (b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1.3 billion. The remaining affiliated amounts were immaterial. (c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $59 million. The remaining affiliated amounts were immaterial. (d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues. (e)Generation & Marketing includes economic hedge activity.
|  | Year Ended December 31, 2021
|  | Vertically Integrated Utilities |  | Transmission and Distribution Utilities |  | AEP Transmission Holdco |  | Generation & Marketing |  | Corporate and Other |  | Reconciling Adjustments |  | AEP Consolidated
|  | (in millions)
Retail Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Revenues |  | $ | 3,952.6 |  |  | $ | 2,138.2 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 6,090.8 |
Commercial Revenues |  | 2,208.5 |  |  | 1,081.2 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3,289.7 |
Industrial Revenues |  | 2,168.2 |  |  | 395.2 |  |  | — |  |  | — |  |  | — |  |  | (0.8) |  |  | 2,562.6 |
Other Retail Revenues |  | 170.6 |  |  | 43.9 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 214.5 |
Total Retail Revenues |  | 8,499.9 |  |  | 3,658.5 |  |  | — |  |  | — |  |  | — |  |  | (0.8) |  |  | 12,157.6 |
Wholesale and Competitive Retail Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Generation Revenues |  | 942.6 |  |  | — |  |  | — |  |  | 137.9 |  |  | — |  |  | — |  |  | 1,080.5 |
Transmission Revenues (a) |  | 355.5 |  |  | 572.4 |  |  | 1,456.4 |  |  | — |  |  | — |  |  | (1,206.0) |  |  | 1,178.3 |
Renewable Generation Revenues (b) |  | — |  |  | — |  |  | — |  |  | 86.9 |  |  | — |  |  | (3.6) |  |  | 83.3 |
Retail, Trading and Marketing Revenues (c) |  | — |  |  | — |  |  | — |  |  | 1,722.6 |  |  | 1.4 |  |  | (51.6) |  |  | 1,672.4 |
Total Wholesale and Competitive Retail Revenues |  | 1,298.1 |  |  | 572.4 |  |  | 1,456.4 |  |  | 1,947.4 |  |  | 1.4 |  |  | (1,261.2) |  |  | 4,014.5 |
Other Revenues from Contracts with Customers (b) |  | 187.5 |  |  | 194.2 |  |  | 17.1 |  |  | 7.2 |  |  | 60.1 |  |  | (115.2) |  |  | 350.9 |
Total Revenues from Contracts with Customers |  | 9,985.5 |  |  | 4,425.1 |  |  | 1,473.5 |  |  | 1,954.6 |  |  | 61.5 |  |  | (1,377.2) |  |  | 16,523.0 |
Other Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Alternative Revenue Programs (d) |  | 13.5 |  |  | 48.8 |  |  | 52.7 |  |  | — |  |  | — |  |  | (73.6) |  |  | 41.4 |
Other Revenues (b) (e) |  | (0.5) |  |  | 19.0 |  |  | — |  |  | 209.1 |  |  | 10.7 |  |  | (10.7) |  |  | 227.6 |
Total Other Revenues |  | 13.0 |  |  | 67.8 |  |  | 52.7 |  |  | 209.1 |  |  | 10.7 |  |  | (84.3) |  |  | 269.0 |
Total Revenues |  | $ | 9,998.5 |  |  | $ | 4,492.9 |  |  | $ | 1,526.2 |  |  | $ | 2,163.7 |  |  | $ | 72.2 |  |  | $ | (1,461.5) |  |  | $ | 16,792.0 |
(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1.1 billion. The remaining affiliated amounts were immaterial. (b)Amounts include affiliated and nonaffiliated revenues. (c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $52 million. The remaining affiliated amounts were immaterial. (d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues. (e)Generation & Marketing includes economic hedge activity. The table below represents revenues from contracts with customers, net of respective provisions for refund, by type of revenue for the Registrant Subsidiaries:
|  | Year Ended December 31, 2023
|  | AEP Texas |  | AEPTCo |  | APCo |  | I&M |  | OPCo |  | PSO |  | SWEPCo
|  | (in millions)
Retail Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Revenues |  | $ | 655.5 |  |  | $ | — |  |  | $ | 1,612.9 |  |  | $ | 841.9 |  |  | $ | 1,953.7 |  |  | $ | 831.2 |  |  | $ | 799.5 |
Commercial Revenues |  | 415.2 |  |  | — |  |  | 699.6 |  |  | 575.2 |  |  | 1,082.0 |  |  | 538.8 |  |  | 609.4 |
Industrial Revenues (a) |  | 145.0 |  |  | — |  |  | 778.4 |  |  | 614.2 |  |  | 497.1 |  |  | 423.1 |  |  | 415.9 |
Other Retail Revenues |  | 35.5 |  |  | — |  |  | 106.3 |  |  | 5.0 |  |  | 15.1 |  |  | 112.8 |  |  | 10.1 |
Total Retail Revenues |  | 1,251.2 |  |  | — |  |  | 3,197.2 |  |  | 2,036.3 |  |  | 3,547.9 |  |  | 1,905.9 |  |  | 1,834.9 |
Wholesale Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Generation Revenues (b) |  | — |  |  | — |  |  | 288.2 |  |  | 327.1 |  |  | — |  |  | 11.7 |  |  | 176.9 |
Transmission Revenues (c) |  | 619.0 |  |  | 1,703.9 |  |  | 181.0 |  |  | 38.6 |  |  | 82.6 |  |  | 37.5 |  |  | 150.8 |
Total Wholesale Revenues |  | 619.0 |  |  | 1,703.9 |  |  | 469.2 |  |  | 365.7 |  |  | 82.6 |  |  | 49.2 |  |  | 327.7 |
Other Revenues from Contracts with Customers (d) |  | 35.9 |  |  | 16.7 |  |  | 74.2 |  |  | 120.3 |  |  | 172.3 |  |  | 21.5 |  |  | 29.5 |
Total Revenues from Contracts with Customers |  | 1,906.1 |  |  | 1,720.6 |  |  | 3,740.6 |  |  | 2,522.3 |  |  | 3,802.8 |  |  | 1,976.6 |  |  | 2,192.1 |
Other Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Alternative Revenue Programs (e) |  | (4.2) |  |  | (48.6) |  |  | (20.1) |  |  | (10.9) |  |  | (15.3) |  |  | 0.5 |  |  | (9.4) |
Other Revenues (a) |  | — |  |  | — |  |  | 0.2 |  |  | 24.5 |  |  | 23.9 |  |  | (0.1) |  |  | 0.1 |
Total Other Revenues |  | (4.2) |  |  | (48.6) |  |  | (19.9) |  |  | 13.6 |  |  | 8.6 |  |  | 0.4 |  |  | (9.3) |
Total Revenues |  | $ | 1,901.9 |  |  | $ | 1,672.0 |  |  | $ | 3,720.7 |  |  | $ | 2,535.9 |  |  | $ | 3,811.4 |  |  | $ | 1,977.0 |  |  | $ | 2,182.8 |
(a)Amounts include affiliated and nonaffiliated revenues. (b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $159 million primarily relating to the PPA with KGPCo. The remaining affiliated amounts were immaterial. (c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $1.4 billion, APCo was $93 million and SWEPCo was $73 million. The remaining affiliated amounts were immaterial. (d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $68 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial. (e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.
|  | Year Ended December 31, 2022
|  | AEP Texas |  | AEPTCo |  | APCo |  | I&M |  | OPCo |  | PSO |  | SWEPCo
|  | (in millions)
Retail Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Revenues |  | $ | 667.2 |  |  | $ | — |  |  | $ | 1,558.7 |  |  | $ | 852.4 |  |  | $ | 1,830.2 |  |  | $ | 816.3 |  |  | $ | 820.7 |
Commercial Revenues |  | 417.5 |  |  | — |  |  | 643.4 |  |  | 550.2 |  |  | 947.7 |  |  | 489.2 |  |  | 612.3 |
Industrial Revenues (a) |  | 139.6 |  |  | — |  |  | 664.0 |  |  | 602.9 |  |  | 571.7 |  |  | 372.5 |  |  | 393.5 |
Other Retail Revenues |  | 35.3 |  |  | — |  |  | 87.1 |  |  | 5.0 |  |  | 13.9 |  |  | 102.9 |  |  | 10.1 |
Total Retail Revenues |  | 1,259.6 |  |  | — |  |  | 2,953.2 |  |  | 2,010.5 |  |  | 3,363.5 |  |  | 1,780.9 |  |  | 1,836.6 |
Wholesale Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Generation Revenues (b) |  | — |  |  | — |  |  | 299.9 |  |  | 490.0 |  |  | — |  |  | 26.5 |  |  | 273.2 |
Transmission Revenues (c) |  | 563.8 |  |  | 1,643.5 |  |  | 167.0 |  |  | 36.8 |  |  | 86.2 |  |  | 39.2 |  |  | 148.7 |
Total Wholesale Revenues |  | 563.8 |  |  | 1,643.5 |  |  | 466.9 |  |  | 526.8 |  |  | 86.2 |  |  | 65.7 |  |  | 421.9 |
Other Revenues from Contracts with Customers (d) |  | 24.6 |  |  | 8.2 |  |  | 100.6 |  |  | 122.4 |  |  | 222.4 |  |  | 29.1 |  |  | 24.7 |
Total Revenues from Contracts with Customers |  | 1,848.0 |  |  | 1,651.7 |  |  | 3,520.7 |  |  | 2,659.7 |  |  | 3,672.1 |  |  | 1,875.7 |  |  | 2,283.2 |
Other Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Alternative Revenue Programs (e) |  | (1.2) |  |  | (27.2) |  |  | (1.3) |  |  | 10.0 |  |  | (25.6) |  |  | (1.0) |  |  | 1.2 |
Other Revenues (a) |  | — |  |  | — |  |  | 0.5 |  |  | (0.1) |  |  | 18.6 |  |  | — |  |  | — |
Total Other Revenues |  | (1.2) |  |  | (27.2) |  |  | (0.8) |  |  | 9.9 |  |  | (7.0) |  |  | (1.0) |  |  | 1.2 |
Total Revenues |  | $ | 1,846.8 |  |  | $ | 1,624.5 |  |  | $ | 3,519.9 |  |  | $ | 2,669.6 |  |  | $ | 3,665.1 |  |  | $ | 1,874.7 |  |  | $ | 2,284.4 |
(a)Amounts include affiliated and nonaffiliated revenues. (b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $170 million primarily relating to the PPA with KGPCo. The remaining affiliated amounts were immaterial. (c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $1.3 billion, APCo was $78 million and SWEPCo was $51 million. The remaining affiliated amounts were immaterial. (d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $62 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial. (e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.
|  | Year Ended December 31, 2021
|  | AEP Texas |  | AEPTCo |  | APCo |  | I&M |  | OPCo |  | PSO |  | SWEPCo
|  | (in millions)
Retail Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Revenues |  | $ | 550.3 |  |  | $ | — |  |  | $ | 1,379.6 |  |  | $ | 805.4 |  |  | $ | 1,587.9 |  |  | $ | 651.9 |  |  | $ | 709.5 |
Commercial Revenues |  | 358.5 |  |  | — |  |  | 556.3 |  |  | 507.2 |  |  | 722.7 |  |  | 378.9 |  |  | 529.3 |
Industrial Revenues |  | 108.9 |  |  | — |  |  | 584.3 |  |  | 557.0 |  |  | 286.3 |  |  | 274.1 |  |  | 344.4 |
Other Retail Revenues |  | 31.3 |  |  | — |  |  | 70.8 |  |  | 5.2 |  |  | 12.6 |  |  | 77.7 |  |  | 10.0 |
Total Retail Revenues |  | 1,049.0 |  |  | — |  |  | 2,591.0 |  |  | 1,874.8 |  |  | 2,609.5 |  |  | 1,382.6 |  |  | 1,593.2 |
Wholesale Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Generation Revenues (a) |  | — |  |  | — |  |  | 302.7 |  |  | 318.1 |  |  | — |  |  | 22.9 |  |  | 386.6 |
Transmission Revenues (b) |  | 497.5 |  |  | 1,393.9 |  |  | 128.8 |  |  | 33.7 |  |  | 74.9 |  |  | 37.5 |  |  | 122.7 |
Total Wholesale Revenues |  | 497.5 |  |  | 1,393.9 |  |  | 431.5 |  |  | 351.8 |  |  | 74.9 |  |  | 60.4 |  |  | 509.3 |
Other Revenues from Contracts with Customers (c) |  | 41.2 |  |  | 17.0 |  |  | 70.4 |  |  | 104.1 |  |  | 153.1 |  |  | 31.3 |  |  | 23.5 |
Total Revenues from Contracts with Customers |  | 1,587.7 |  |  | 1,410.9 |  |  | 3,092.9 |  |  | 2,330.7 |  |  | 2,837.5 |  |  | 1,474.3 |  |  | 2,126.0 |
Other Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Alternative Revenue Programs (d) |  | 6.1 |  |  | 58.4 |  |  | 12.3 |  |  | (4.0) |  |  | 42.6 |  |  | 0.1 |  |  | 5.8 |
Other Revenues (e) |  | — |  |  | — |  |  | — |  |  | — |  |  | 19.0 |  |  | — |  |  | — |
Total Other Revenues |  | 6.1 |  |  | 58.4 |  |  | 12.3 |  |  | (4.0) |  |  | 61.6 |  |  | 0.1 |  |  | 5.8 |
Total Revenues |  | $ | 1,593.8 |  |  | $ | 1,469.3 |  |  | $ | 3,105.2 |  |  | $ | 2,326.7 |  |  | $ | 2,899.1 |  |  | $ | 1,474.4 |  |  | $ | 2,131.8 |
(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $129 million primarily relating to the PPA with KGPCo. The remaining affiliated amounts were immaterial. (b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $1.1 billion. The remaining affiliated amounts were immaterial. (c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $60 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial. (d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues. (e)Amounts include affiliated and nonaffiliated revenues. Performance Obligations AEP has performance obligations as part of its normal course of business. A performance obligation is a promise to transfer a distinct good or service, or a series of distinct goods or services that are substantially the same and have the same pattern of transfer to a customer. The invoice practical expedient within the accounting guidance for “Revenue from Contracts with Customers” allows for the recognition of revenue from performance obligations in the amount of consideration to which there is a right to invoice the customer and when the amount for which there is a right to invoice corresponds directly to the value transferred to the customer. The purpose of the invoice practical expedient is to depict an entity’s measure of progress toward completion of the performance obligation within a contract and can only be applied to performance obligations that are satisfied over time and when the invoice is representative of services provided to date. AEP subsidiaries elected to apply the invoice practical expedient to recognize revenue for performance obligations satisfied over time as the invoices from the respective revenue streams are representative of services or goods provided to date to the customer. Performance obligations for AEP’s subsidiaries are summarized as follows: Retail Revenues AEP’s subsidiaries within the Vertically Integrated Utilities and Transmission and Distribution Utilities segments have performance obligations to generate, transmit and distribute electricity for sale to rate-regulated retail customers. The performance obligation to deliver electricity is satisfied over time as the customer simultaneously receives and consumes the benefits provided. Revenues are variable as they are subject to the customer’s usage requirements. Rate-regulated retail customers typically have the right to discontinue receiving service at will, therefore these contracts between AEP’s subsidiaries and their customers for rate-regulated services are generally limited to the services requested and received to date for such arrangements. Retail customers are generally billed on a monthly basis, and payment is typically due within 15 to 20 days after the issuance of the invoice. Payments from REPs are due to AEP Texas within 35 days. Wholesale Revenues - Generation AEP’s subsidiaries within the Vertically Integrated Utilities and Generation & Marketing segments have performance obligations to sell electricity to wholesale customers from generation assets in PJM, SPP and ERCOT. The performance obligation to deliver electricity from generation assets is satisfied over time as the customer simultaneously receives and consumes the benefits provided. Wholesale generation revenues are variable as they are subject to the customer’s usage requirements. AEP’s subsidiaries within the Vertically Integrated Utilities and Generation & Marketing segments also have performance obligations to stand ready in order to promote grid reliability. Stand ready services are sold into PJM’s RPM capacity market. RPM entails a base auction and at least three incremental auctions for a specific PJM delivery year, with the incremental auctions spanning three years. The performance obligation to stand ready is satisfied over time and the consideration for which is variable until the occurrence of the final incremental auction, at which point the performance obligation becomes fixed. Payments from the RTO for stand ready services are typically received within one week from the issuance of the invoice, which is typically issued weekly. Gross margin resulting from generation sales within the Vertically Integrated Utilities segment are primarily subject to margin sharing agreements with customers and vary by state, where the revenues are reflected gross in the disaggregated revenues tables above. APCo has a performance obligation to supply wholesale electricity to KGPCo through a PPA. The FERC regulates the cost-based wholesale power transactions between APCo and KGPCo. The purchased power agreement includes a component for the recovery of transmission costs under the FERC OATT. The transmission cost component of purchased power is cost-based and regulated by the Tennessee Regulatory Authority. APCo’s performance obligation under the purchased power agreement is satisfied over time as KGPCo simultaneously receives and consumes the wholesale electricity. APCo’s revenues from the purchased power agreement are presented within the Generation Revenues line in the disaggregated revenues tables above. Wholesale Revenues - Transmission AEP’s subsidiaries within the Vertically Integrated Utilities, Transmission and Distribution Utilities and AEP Transmission Holdco segments have performance obligations to transmit electricity to wholesale customers through assets owned and operated by AEP subsidiaries. The performance obligation to provide transmission services in PJM, SPP and ERCOT is partially fixed for a period of one year or less. Payments from the RTO for transmission services are typically received within one week from the issuance of the invoice, which is issued monthly for SPP and ERCOT and weekly for PJM. AEP subsidiaries within the PJM and SPP regions collect revenues through transmission formula rates. The FERC-approved rates establish the annual transmission revenue requirement (ATRR) and transmission service rates for transmission owners. The formula rates establish rates for a one year period and also include a true-up calculation for the prior year’s billings, allowing for over/under-recovery of the transmission owner’s ATRR. The annual true-ups meet the definition of alternative revenues in accordance with the accounting guidance for “Regulated Operations,” and are therefore presented as such in the disaggregated revenues tables above. AEP subsidiaries within the ERCOT region collect revenues through a combination of base rates and interim Transmission Costs of Services filings that are approved by the PUCT. The AEP East Companies are parties to the TA, which defines how transmission costs are allocated among the AEP East Companies on a 12-month average coincident peak basis. PSO, SWEPCo and AEPSC are parties to the TCA by and among PSO, SWEPCo and AEPSC, in connection with the operation of the transmission assets of the two AEP utility subsidiaries. AEPTCo is a transmission owner within the PJM and SPP regions providing transmission services to affiliates in accordance with the OATT, TA and TCA. Affiliate revenues as a result of the respective TA and the TCA are reflected as Transmission Revenues in the disaggregated revenues tables above. Marketing, Competitive Retail and Renewable Revenues AEP’s subsidiaries within the Generation & Marketing segment have performance obligations to deliver electricity to competitive retail and wholesale customers. Performance obligations for marketing, competitive retail and renewable offtake sales are satisfied over time as the customer simultaneously receives and consumes the benefits provided. Revenues are primarily variable as they are subject to customer’s usage requirements; however, certain contracts mandate a delivery of a set quantity of electricity at a predetermined price, resulting in a fixed performance obligation. Payment terms under marketing arrangements typically follow standard Edison Electric Institute and International Swaps and Derivatives Association terms, which call for payment in 20 days. Payments for competitive retail and offtake arrangements for renewable assets range from 15 to 60 days and are dependent on the product sold, location and the creditworthiness of customer. Invoices for marketing arrangements, competitive retail and offtake arrangements for renewable assets are issued monthly. Fixed Performance Obligations (Applies to AEP, APCo and I&M) The following table represents the Registrants’ remaining fixed performance obligations satisfied over time as of December 31, 2023. Fixed performance obligations primarily include electricity sales for fixed amounts of energy and stand ready services into PJM’s RPM market. The Registrants elected to apply the exemption to not disclose the value of unsatisfied performance obligations for contracts with an original expected term of one year or less. Due to the annual establishment of revenue requirements, transmission revenues are excluded from the table below. The Registrant Subsidiaries amounts shown in the table below include affiliated and nonaffiliated revenues.
Company |  | 2024 |  | 2025-2026 |  | 2027-2028 |  | After 2028 |  | Total
|  | (in millions)
AEP |  | $ | 84.4 |  |  | $ | 167.2 |  |  | $ | 84.4 |  |  | $ | 27.3 |  |  | $ | 363.3 |
APCo |  | 16.1 |  |  | 32.2 |  |  | 23.2 |  |  | 11.7 |  |  | 83.2 |
I&M |  | 4.4 |  |  | 8.8 |  |  | 8.8 |  |  | 4.5 |  |  | 26.5 |
Contract Assets and Liabilities Contract assets are recognized when the Registrants have a right to consideration that is conditional upon the occurrence of an event other than the passage of time, such as future performance under a contract. The Registrants did not have any material contract assets as of December 31, 2023 and 2022. When the Registrants receive consideration, or such consideration is unconditionally due from a customer prior to transferring goods or services to the customer under the terms of a sales contract, they recognize a contract liability on the balance sheet in the amount of that consideration. Revenue for such consideration is subsequently recognized in the period or periods in which the remaining performance obligations in the contract are satisfied. The Registrants’ contract liabilities typically arise from services provided under joint use agreements for utility poles. The Registrants did not have any material contract liabilities as of December 31, 2023 and 2022. Accounts Receivable from Contracts with Customers Accounts receivable from contracts with customers are presented on the Registrants’ balance sheets within the Accounts Receivable - Customers line item. The Registrants’ balances for receivables from contracts that are not recognized in accordance with the accounting guidance for “Revenue from Contracts with Customers” included in Accounts Receivable - Customers were not material as of December 31, 2023 and 2022. See “Securitized Accounts Receivable - AEP Credit” section of Note 14 for additional information. The following table represents the amount of affiliated accounts receivable from contracts with customers included in Accounts Receivable - Affiliated Companies on the Registrant Subsidiaries’ balance sheets:
Years Ended December 31, |  | AEP Texas |  | AEPTCo |  | APCo |  | I&M |  | OPCo |  | PSO |  | SWEPCo
|  | (in millions)
2023 |  | $ | — |  |  | $ | 123.2 |  |  | $ | 71.7 |  |  | $ | 44.0 |  |  | $ | 70.1 |  |  | $ | 12.4 |  |  | $ | 27.4 |
2022 |  | 0.1 |  | 113.8 |  | 64.5 |  | 75.3 |  | 49.9 |  | 18.8 |  | 19.1
Contract Costs Contract costs to obtain or fulfill a contract for AEP subsidiaries within the Generation & Marketing segment are accounted for under the guidance for “Other Assets and Deferred Costs” and presented as a single asset and are neither bifurcated nor reclassified between current and noncurrent assets on the Registrants’ balance sheets. Contract costs to acquire a contract are amortized in a manner consistent with the transfer of goods or services to the customer in Other Operation on the Registrants’ income statements. The Registrants did not have material contract costs as of December 31, 2023 and 2022.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-9 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-15 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-13 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org//606/tableOfContent + Details
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