Year Ended December 31, 2019 AEP Texas AEPTCo APCo I&M OPCo PSO SWEPCo (in millions) Retail Revenues: Residential Revenues $ 571.5  $ —  $ 1,266.9  $ 730.0  $ 1,502.0  $ 650.2  $ 638.6  Commercial Revenues 411.5  —  559.9  494.2  738.5  388.5  485.4  Industrial Revenues 129.4  —  592.2  550.7  299.9  303.5  338.7  Other Retail Revenues 29.9  —  75.2  7.3  13.1  81.6  9.0  Total Retail Revenues 1,142.3  —  2,494.2  1,782.2  2,553.5  1,423.8  1,471.7  Wholesale Revenues: Generation Revenues (a) —  —  251.5  402.4  —  39.5  194.7  Transmission Revenues (b) 379.2  1,025.5  103.6  25.1  56.0  27.5  106.7  Total Wholesale Revenues 379.2  1,025.5  355.1  427.5  56.0  67.0  301.4  Other Revenues from Contracts with Customers (c) 30.1  16.6  61.8  98.4  139.3  22.0  26.1  Total Revenues from Contracts with Customers 1,551.6  1,042.1  2,911.1  2,308.1  2,748.8  1,512.8  1,799.2  Other Revenues: Alternative Revenues (d) 0.6  (20.7) 13.6  (1.4) 31.7  (31.0) (48.3) Other Revenues (d) 157.1  —  —  —  17.1  —  —  Total Other Revenues 157.7  (20.7) 13.6  (1.4) 48.8  (31.0) (48.3) Total Revenues $ 1,709.3  $ 1,021.4  $ 2,924.7  $ 2,306.7  $ 2,797.6  $ 1,481.8  $ 1,750.9  (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 $782 million. The remaining affiliated amounts were immaterial. (c) Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $73 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial. (d) Amounts include affiliated and nonaffiliated revenues. 412