v3.26.3
REVENUE (Tables)
9 Months Ended
Sep. 30, 2026
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue
The following table represents a disaggregation of revenue from contracts with regulated transmission customers for the three and nine months ended September 30, 2026, and 2025, by transmission owner:
Revenues from Contracts with Customers by Transmission Asset OwnerFor the Three Months Ended September 30,For the Nine Months Ended September 30,
2026202520262025
(In millions)
ATSI$261 $273 $837 $792 
TrAIL65 66 189 197 
MAIT148 121 435 365 
Total Revenue from Contracts with Customers474 460 1,461 1,354 
Other revenue unrelated to contracts with customers
5 4 19 13 
Total revenues$479 $464 $1,480 $1,367